Merge pull request #440 from databasus/develop

FIX (local storage): Add fallback for file movement via renaming to s…

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,44 @@
+---
+name: Bug Report
+about: Report a bug or unexpected behavior in Databasus
+labels: bug
+---
+
+## Databasus version (screenshot)
+
+It is displayed in the bottom left corner of the Databasus UI. Please attach screenshot, not just version text
+
+<!-- e.g. 1.4.2 -->
+
+## Operating system and architecture
+
+<!-- e.g. Ubuntu 22.04 x64, macOS 14 ARM, Windows 11 x64 -->
+
+## Database type and version (optional, for DB-related bugs)
+
+<!-- e.g. PostgreSQL 16 in Docker, MySQL 8.0 installed on server, MariaDB 11.4 in AWS Cloud -->
+
+## Describe the bug (please write manually, do not ask AI to summarize)
+
+**What happened:**
+
+**What I expected:**
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Have you asked AI how to solve the issue?
+
+<!-- Using AI to diagnose issues before filing a bug report helps narrow down root causes. -->
+
+- [ ] Claude Sonnet 4.6 or newer
+- [ ] ChatGPT 5.2 or newer
+- [ ] No
+
+
+## Additional context / logs
+
+<!-- Screenshots, error messages, relevant log output, etc. -->

.github/workflows/ci-release.yml

@@ -11,7 +11,7 @@ jobs:
   lint-backend:
     runs-on: self-hosted
     container:
-      image: golang:1.24.9
+      image: golang:1.26.1
       volumes:
         - /runner-cache/go-pkg:/go/pkg/mod
         - /runner-cache/go-build:/root/.cache/go-build
@@ -32,7 +32,7 @@ jobs:
 
       - name: Install golangci-lint
         run: |
-          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.7.2
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.11.3
           echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
 
       - name: Install swag for swagger generation
@@ -86,6 +86,39 @@ jobs:
           cd frontend
           npm run build
 
+  lint-agent:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.26.1"
+          cache-dependency-path: agent/go.sum
+
+      - name: Download Go modules
+        run: |
+          cd agent
+          go mod download
+
+      - name: Install golangci-lint
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.11.3
+          echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+
+      - name: Run golangci-lint
+        run: |
+          cd agent
+          golangci-lint run
+
+      - name: Verify go mod tidy
+        run: |
+          cd agent
+          go mod tidy
+          git diff --exit-code go.mod go.sum || (echo "go mod tidy made changes, please run 'go mod tidy' and commit the changes" && exit 1)
+
   test-frontend:
     runs-on: ubuntu-latest
     needs: [lint-frontend]
@@ -108,11 +141,55 @@ jobs:
           cd frontend
           npm run test
 
+  test-agent:
+    runs-on: ubuntu-latest
+    needs: [lint-agent]
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.26.1"
+          cache-dependency-path: agent/go.sum
+
+      - name: Download Go modules
+        run: |
+          cd agent
+          go mod download
+
+      - name: Run Go tests
+        run: |
+          cd agent
+          go test -count=1 -failfast ./internal/...
+
+  e2e-agent:
+    runs-on: ubuntu-latest
+    needs: [lint-agent]
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Run e2e tests
+        run: |
+          cd agent
+          make e2e
+
+      - name: Cleanup
+        if: always()
+        run: |
+          cd agent/e2e
+          docker compose down -v --rmi local || true
+          rm -rf artifacts || true
+
+  # Self-hosted: performant high-frequency CPU is used to start many containers and run tests fast. Tests
+  # step is bottle-neck, because we need a lot of containers and cannot parallelize tests due to shared resources
   test-backend:
     runs-on: self-hosted
     needs: [lint-backend]
     container:
-      image: golang:1.24.9
+      image: golang:1.26.1
       options: --privileged -v /var/run/docker.sock:/var/run/docker.sock --add-host=host.docker.internal:host-gateway
       volumes:
         - /runner-cache/go-pkg:/go/pkg/mod
@@ -407,7 +484,7 @@ jobs:
       - name: Run database migrations
         run: |
           cd backend
-          go install github.com/pressly/goose/v3/cmd/goose@latest
+          go install github.com/pressly/goose/v3/cmd/goose@v3.24.3
           goose up
 
       - name: Run Go tests
@@ -441,7 +518,7 @@ jobs:
     runs-on: self-hosted
     container:
       image: node:20
-    needs: [test-backend, test-frontend]
+    needs: [test-backend, test-frontend, test-agent, e2e-agent]
     if: ${{ github.ref == 'refs/heads/main' && !contains(github.event.head_commit.message, '[skip-release]') }}
     outputs:
       should_release: ${{ steps.version_bump.outputs.should_release }}
@@ -534,7 +611,7 @@ jobs:
 
   build-only:
     runs-on: self-hosted
-    needs: [test-backend, test-frontend]
+    needs: [test-backend, test-frontend, test-agent, e2e-agent]
     if: ${{ github.ref == 'refs/heads/main' && contains(github.event.head_commit.message, '[skip-release]') }}
     steps:
       - name: Clean workspace

.gitignore

@@ -5,6 +5,7 @@ databasus-data/
 .env
 pgdata/
 docker-compose.yml
+!agent/e2e/docker-compose.yml
 node_modules/
 .idea
 /articles
@@ -12,3 +13,4 @@ node_modules/
 .DS_Store
 /scripts
 .vscode/settings.json
+.claude

.pre-commit-config.yaml

@@ -41,3 +41,20 @@ repos:
         language: system
         files: ^backend/.*\.go$
         pass_filenames: false
+
+  # Agent checks
+  - repo: local
+    hooks:
+      - id: agent-format-and-lint
+        name: Agent Format & Lint (golangci-lint)
+        entry: bash -c "cd agent && golangci-lint fmt ./internal/... ./cmd/... && golangci-lint run ./internal/... ./cmd/..."
+        language: system
+        files: ^agent/.*\.go$
+        pass_filenames: false
+
+      - id: agent-go-mod-tidy
+        name: Agent Go Mod Tidy
+        entry: bash -c "cd agent && go mod tidy"
+        language: system
+        files: ^agent/.*\.go$
+        pass_filenames: false

AGENTS.md

@@ -1,35 +1,37 @@
 # Agent Rules and Guidelines
 
-This document contains all coding standards, conventions and best practices recommended for the Databasus project.
+This document contains all coding standards, conventions and best practices recommended for the TgTaps project.
 This is NOT a strict set of rules, but a set of recommendations to help you write better code.
 
 ---
 
 ## Table of Contents
 
-- [Engineering Philosophy](#engineering-philosophy)
-- [Backend Guidelines](#backend-guidelines)
-  - [Code Style](#code-style)
+- [Engineering philosophy](#engineering-philosophy)
+- [Backend guidelines](#backend-guidelines)
+  - [Code style](#code-style)
+  - [Boolean naming](#boolean-naming)
+  - [Add reasonable new lines between logical statements](#add-reasonable-new-lines-between-logical-statements)
   - [Comments](#comments)
   - [Controllers](#controllers)
-  - [Dependency Injection (DI)](#dependency-injection-di)
+  - [Dependency injection (DI)](#dependency-injection-di)
   - [Migrations](#migrations)
   - [Refactoring](#refactoring)
   - [Testing](#testing)
-  - [Time Handling](#time-handling)
-  - [CRUD Examples](#crud-examples)
-- [Frontend Guidelines](#frontend-guidelines)
-  - [React Component Structure](#react-component-structure)
+  - [Time handling](#time-handling)
+  - [CRUD examples](#crud-examples)
+- [Frontend guidelines](#frontend-guidelines)
+  - [React component structure](#react-component-structure)
 
 ---
 
-## Engineering Philosophy
+## Engineering philosophy
 
 **Think like a skeptical senior engineer and code reviewer. Don't just do what was asked—also think about what should have been asked.**
 
 ⚠️ **Balance vigilance with pragmatism:** Catch real issues, not theoretical ones. Don't let perfect be the enemy of good.
 
-### Task Context Assessment:
+### Task context assessment:
 
 **First, assess the task scope:**
 
@@ -38,7 +40,7 @@ This is NOT a strict set of rules, but a set of recommendations to help you writ
 - **Complex** (architecture, security, performance-critical): Full analysis required
 - **Unclear** (ambiguous requirements): Always clarify assumptions first
 
-### For Non-Trivial Tasks:
+### For non-trivial tasks:
 
 1. **Restate the objective and list assumptions** (explicit + implicit)
    - If any assumption is shaky, call it out clearly
@@ -71,7 +73,7 @@ This is NOT a strict set of rules, but a set of recommendations to help you writ
    - Patch the answer accordingly
    - Verify edge cases are handled
 
-### Application Guidelines:
+### Application guidelines:
 
 **Scale your response to the task:**
 
@@ -84,9 +86,9 @@ This is NOT a strict set of rules, but a set of recommendations to help you writ
 
 ---
 
-## Backend Guidelines
+## Backend guidelines
 
-### Code Style
+### Code style
 
 **Always place private methods to the bottom of file**
 
@@ -94,7 +96,7 @@ This rule applies to ALL Go files including tests, services, controllers, reposi
 
 In Go, exported (public) functions/methods start with uppercase letters, while unexported (private) ones start with lowercase letters.
 
-#### Structure Order:
+#### Structure order:
 
 1. Type definitions and constants
 2. Public methods/functions (uppercase)
@@ -227,7 +229,7 @@ func (c *ProjectController) extractProjectID(ctx *gin.Context) uuid.UUID {
 }
 ```
 
-#### Key Points:
+#### Key points:
 
 - **Exported/Public** = starts with uppercase letter (CreateUser, GetProject)
 - **Unexported/Private** = starts with lowercase letter (validateUser, handleError)
@@ -237,13 +239,13 @@ func (c *ProjectController) extractProjectID(ctx *gin.Context) uuid.UUID {
 
 ---
 
-### Boolean Naming
+### Boolean naming
 
 **Always prefix boolean variables with verbs like `is`, `has`, `was`, `should`, `can`, etc.**
 
 This makes the code more readable and clearly indicates that the variable represents a true/false state.
 
-#### Good Examples:
+#### Good examples:
 
 ```go
 type User struct {
@@ -265,7 +267,7 @@ wasCompleted := false
 hasPermission := checkPermissions()
 ```
 
-#### Bad Examples:
+#### Bad examples:
 
 ```go
 type User struct {
@@ -286,7 +288,7 @@ completed := false   // Should be: wasCompleted
 permission := true   // Should be: hasPermission
 ```
 
-#### Common Boolean Prefixes:
+#### Common boolean prefixes:
 
 - **is** - current state (IsActive, IsValid, IsEnabled)
 - **has** - possession or presence (HasAccess, HasPermission, HasError)
@@ -297,6 +299,167 @@ permission := true   // Should be: hasPermission
 
 ---
 
+### Add reasonable new lines between logical statements
+
+**Add blank lines between logical blocks to improve code readability.**
+
+Separate different logical operations within a function with blank lines. This makes the code flow clearer and helps identify distinct steps in the logic.
+
+#### Guidelines:
+
+- Add blank line before final `return` statement
+- Add blank line after variable declarations before using them
+- Add blank line between error handling and subsequent logic
+- Add blank line between different logical operations
+
+#### Bad example (without spacing):
+
+```go
+func (t *Task) BeforeSave(tx *gorm.DB) error {
+	if len(t.Messages) > 0 {
+		messagesBytes, err := json.Marshal(t.Messages)
+		if err != nil {
+			return err
+		}
+		t.MessagesJSON = string(messagesBytes)
+	}
+	return nil
+}
+
+func (t *Task) AfterFind(tx *gorm.DB) error {
+	if t.MessagesJSON != "" {
+		var messages []onewin_dto.TaskCompletionMessage
+		if err := json.Unmarshal([]byte(t.MessagesJSON), &messages); err != nil {
+			return err
+		}
+		t.Messages = messages
+	}
+	return nil
+}
+```
+
+#### Good example (with proper spacing):
+
+```go
+func (t *Task) BeforeSave(tx *gorm.DB) error {
+	if len(t.Messages) > 0 {
+		messagesBytes, err := json.Marshal(t.Messages)
+		if err != nil {
+			return err
+		}
+
+		t.MessagesJSON = string(messagesBytes)
+	}
+
+	return nil
+}
+
+func (t *Task) AfterFind(tx *gorm.DB) error {
+	if t.MessagesJSON != "" {
+		var messages []onewin_dto.TaskCompletionMessage
+		if err := json.Unmarshal([]byte(t.MessagesJSON), &messages); err != nil {
+			return err
+		}
+
+		t.Messages = messages
+	}
+
+	return nil
+}
+```
+
+#### More examples:
+
+**Service method with multiple operations:**
+
+```go
+func (s *UserService) CreateUser(request *CreateUserRequest) (*User, error) {
+	// Validate input
+	if err := s.validateUserRequest(request); err != nil {
+		return nil, err
+	}
+
+	// Create user entity
+	user := &User{
+		ID:    uuid.New(),
+		Name:  request.Name,
+		Email: request.Email,
+	}
+
+	// Save to database
+	if err := s.repository.Create(user); err != nil {
+		return nil, err
+	}
+
+	// Send notification
+	s.notificationService.SendWelcomeEmail(user.Email)
+
+	return user, nil
+}
+```
+
+**Repository method with query building:**
+
+```go
+func (r *Repository) GetFiltered(filters *Filters) ([]*Entity, error) {
+	query := storage.GetDb().Model(&Entity{})
+
+	if filters.Status != "" {
+		query = query.Where("status = ?", filters.Status)
+	}
+
+	if filters.CreatedAfter != nil {
+		query = query.Where("created_at > ?", filters.CreatedAfter)
+	}
+
+	var entities []*Entity
+	if err := query.Find(&entities).Error; err != nil {
+		return nil, err
+	}
+
+	return entities, nil
+}
+```
+
+**Repository method with error handling:**
+
+Bad (without spacing):
+
+```go
+func (r *Repository) FindById(id uuid.UUID) (*models.Task, error) {
+	var task models.Task
+	result := storage.GetDb().Where("id = ?", id).First(&task)
+	if result.Error != nil {
+		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
+			return nil, errors.New("task not found")
+		}
+		return nil, result.Error
+	}
+	return &task, nil
+}
+```
+
+Good (with proper spacing):
+
+```go
+func (r *Repository) FindById(id uuid.UUID) (*models.Task, error) {
+	var task models.Task
+
+	result := storage.GetDb().Where("id = ?", id).First(&task)
+	if result.Error != nil {
+		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
+			return nil, errors.New("task not found")
+		}
+
+		return nil, result.Error
+	}
+
+	return &task, nil
+}
+```
+
+---
+
 ### Comments
 
 #### Guidelines
@@ -305,13 +468,14 @@ permission := true   // Should be: hasPermission
 2. **Functions and variables should have meaningful names** - Code should be self-documenting
 3. **Comments for unclear code only** - Only add comments when code logic isn't immediately clear
 
-#### Key Principles:
+#### Key principles:
 
 - **Code should tell a story** - Use descriptive variable and function names
 - **Comments explain WHY, not WHAT** - The code shows what happens, comments explain business logic or complex decisions
 - **Prefer refactoring over commenting** - If code needs explaining, consider making it clearer instead
 - **API documentation is required** - Swagger comments for all HTTP endpoints are mandatory
 - **Complex algorithms deserve comments** - Mathematical formulas, business rules, or non-obvious optimizations
+- **Do not write summary sections in .md files unless directly requested** - Avoid adding "Summary" or "Conclusion" sections at the end of documentation files unless the user explicitly asks for them
 
 #### Example of useless comments:
 
@@ -343,7 +507,7 @@ func CreateValidLogItems(count int, uniqueID string) []logs_receiving.LogItemReq
 
 ### Controllers
 
-#### Controller Guidelines:
+#### Controller guidelines:
 
 1. **When we write controller:**
    - We combine all routes to single controller
@@ -475,7 +639,7 @@ func (c *AuditLogController) GetUserAuditLogs(ctx *gin.Context) {
 
 ---
 
-### Dependency Injection (DI)
+### Dependency injection (DI)
 
 For DI files use **implicit fields declaration styles** (especially for controllers, services, repositories, use cases, etc., not simple data structures).
 
@@ -503,7 +667,7 @@ var orderController = &OrderController{
 
 **This is needed to avoid forgetting to update DI style when we add new dependency.**
 
-#### Force Such Usage
+#### Force such usage
 
 Please force such usage if file look like this (see some services\controllers\repos definitions and getters):
 
@@ -549,13 +713,13 @@ func GetOrderRepository() *repositories.OrderRepository {
 }
 ```
 
-#### SetupDependencies() Pattern
+#### SetupDependencies() pattern
 
 **All `SetupDependencies()` functions must use sync.Once to ensure idempotent execution.**
 
 This pattern allows `SetupDependencies()` to be safely called multiple times (especially in tests) while ensuring the actual setup logic executes only once.
 
-**Implementation Pattern:**
+**Implementation pattern:**
 
 ```go
 package feature
@@ -588,7 +752,7 @@ func SetupDependencies() {
 }
 ```
 
-**Why This Pattern:**
+**Why this pattern:**
 
 - **Tests can call multiple times**: Test setup often calls `SetupDependencies()` multiple times without issues
 - **Thread-safe**: Works correctly with concurrent calls (nanoseconds or seconds apart)
@@ -604,13 +768,13 @@ func SetupDependencies() {
 
 ---
 
-### Background Services
+### Background services
 
 **All background service `Run()` methods must panic if called multiple times to prevent corrupted states.**
 
 Background services run infinite loops and must never be started twice on the same instance. Multiple calls indicate a serious bug that would cause duplicate goroutines, resource leaks, and data corruption.
 
-**Implementation Pattern:**
+**Implementation pattern:**
 
 ```go
 package feature
@@ -654,14 +818,14 @@ func (s *BackgroundService) Run(ctx context.Context) {
 }
 ```
 
-**Why Panic Instead of Warning:**
+**Why panic instead of warning:**
 
 - **Prevents corruption**: Multiple `Run()` calls would create duplicate goroutines consuming resources
 - **Fails fast**: Catches critical bugs immediately in tests and production
 - **Clear indication**: Panic clearly indicates a serious programming error
 - **Applies everywhere**: Same protection in tests and production
 
-**When This Applies:**
+**When this applies:**
 
 - All background services with infinite loops
 - Registry services (BackupNodesRegistry, RestoreNodesRegistry)
@@ -727,14 +891,14 @@ You can shortify, make more readable, improve code quality, etc. Common logic ca
 
 **After writing tests, always launch them and verify that they pass.**
 
-#### Test Naming Format
+#### Test naming format
 
 Use these naming patterns:
 
 - `Test_WhatWeDo_WhatWeExpect`
 - `Test_WhatWeDo_WhichConditions_WhatWeExpect`
 
-#### Examples from Real Codebase:
+#### Examples from real codebase:
 
 - `Test_CreateApiKey_WhenUserIsProjectOwner_ApiKeyCreated`
 - `Test_UpdateProject_WhenUserIsProjectAdmin_ProjectUpdated`
@@ -742,22 +906,22 @@ Use these naming patterns:
 - `Test_GetProjectAuditLogs_WithDifferentUserRoles_EnforcesPermissionsCorrectly`
 - `Test_ProjectLifecycleE2E_CompletesSuccessfully`
 
-#### Testing Philosophy
+#### Testing philosophy
 
-**Prefer Controllers Over Unit Tests:**
+**Prefer controllers over unit tests:**
 
 - Test through HTTP endpoints via controllers whenever possible
 - Avoid testing repositories, services in isolation - test via API instead
 - Only use unit tests for complex model logic when no API exists
 - Name test files `controller_test.go` or `service_test.go`, not `integration_test.go`
 
-**Extract Common Logic to Testing Utilities:**
+**Extract common logic to testing utilities:**
 
 - Create `testing.go` or `testing/testing.go` files for shared test utilities
 - Extract router creation, user setup, models creation helpers (in API, not just structs creation)
 - Reuse common patterns across different test files
 
-**Refactor Existing Tests:**
+**Refactor existing tests:**
 
 - When working with existing tests, always look for opportunities to refactor and improve
 - Extract repetitive setup code to common utilities
@@ -766,7 +930,7 @@ Use these naming patterns:
 - Consolidate similar test patterns across different test files
 - Make tests more readable and maintainable for other developers
 
-**Clean Up Test Data:**
+**Clean up test data:**
 
 - If the feature supports cleanup operations (DELETE endpoints, cleanup methods), use them in tests
 - Clean up resources after test execution to avoid test data pollution
@@ -803,7 +967,7 @@ func Test_BackupLifecycle_CreateAndDelete(t *testing.T) {
 }
 ```
 
-#### Testing Utilities Structure
+#### Testing utilities structure
 
 **Create `testing.go` or `testing/testing.go` files with common utilities:**
 
@@ -839,7 +1003,7 @@ func AddMemberToProject(project *projects_models.Project, member *users_dto.Sign
 }
 ```
 
-#### Controller Test Examples
+#### Controller test examples
 
 **Permission-based testing:**
 
@@ -906,7 +1070,7 @@ func Test_ProjectLifecycleE2E_CompletesSuccessfully(t *testing.T) {
 
 ---
 
-### Time Handling
+### Time handling
 
 **Always use `time.Now().UTC()` instead of `time.Now()`**
 
@@ -914,7 +1078,7 @@ This ensures consistent timezone handling across the application.
 
 ---
 
-### CRUD Examples
+### CRUD examples
 
 This is an example of complete CRUD implementation structure:
 
@@ -1578,9 +1742,9 @@ func createTimedLog(db *gorm.DB, userID *uuid.UUID, message string, createdAt ti
 
 ---
 
-## Frontend Guidelines
+## Frontend guidelines
 
-### React Component Structure
+### React component structure
 
 Write React components with the following structure:
 
@@ -1614,7 +1778,7 @@ export const ReactComponent = ({ someValue }: Props): JSX.Element => {
 }
 ```
 
-#### Structure Order:
+#### Structure order:
 
 1. **Props interface** - Define component props
 2. **Helper functions** (outside component) - Pure utility functions

CLAUDE.md

@@ -0,0 +1 @@
+Look at @AGENTS.md

Dockerfile

@@ -22,7 +22,7 @@ RUN npm run build
 
 # ========= BUILD BACKEND =========
 # Backend build stage
-FROM --platform=$BUILDPLATFORM golang:1.24.9 AS backend-build
+FROM --platform=$BUILDPLATFORM golang:1.26.1 AS backend-build
 
 # Make TARGET args available early so tools built here match the final image arch
 ARG TARGETOS
@@ -66,13 +66,52 @@ RUN CGO_ENABLED=0 \
   go build -o /app/main ./cmd/main.go
 
 
+# ========= BUILD AGENT =========
+# Builds the databasus-agent CLI binary for BOTH x86_64 and ARM64.
+# Both architectures are always built because:
+# - Databasus server runs on one arch (e.g. amd64)
+# - The agent runs on remote PostgreSQL servers that may be on a
+#   different arch (e.g. arm64)
+# - The backend serves the correct binary based on the agent's
+#   ?arch= query parameter
+#
+# We cross-compile from the build platform (no QEMU needed) because the
+# agent is pure Go with zero C dependencies.
+# CGO_ENABLED=0 produces fully static binaries — no glibc/musl dependency,
+# so the agent runs on any Linux distro (Alpine, Debian, Ubuntu, RHEL, etc.).
+# APP_VERSION is baked into the binary via -ldflags so the agent can
+# compare its version against the server and auto-update when needed.
+FROM --platform=$BUILDPLATFORM golang:1.26.1 AS agent-build
+
+ARG APP_VERSION=dev
+
+WORKDIR /agent
+
+COPY agent/go.mod ./
+RUN go mod download
+
+COPY agent/ ./
+
+# Build for x86_64 (amd64) — static binary, no glibc dependency
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -ldflags "-X main.Version=${APP_VERSION}" \
+    -o /agent-binaries/databasus-agent-linux-amd64 ./cmd/main.go
+
+# Build for ARM64 (arm64) — static binary, no glibc dependency
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm64 \
+    go build -ldflags "-X main.Version=${APP_VERSION}" \
+    -o /agent-binaries/databasus-agent-linux-arm64 ./cmd/main.go
+
+
 # ========= RUNTIME =========
 FROM debian:bookworm-slim
 
 # Add version metadata to runtime image
 ARG APP_VERSION=dev
+ARG TARGETARCH
 LABEL org.opencontainers.image.version=$APP_VERSION
 ENV APP_VERSION=$APP_VERSION
+ENV CONTAINER_ARCH=$TARGETARCH
 
 # Set production mode for Docker containers
 ENV ENV_MODE=production
@@ -218,6 +257,10 @@ COPY backend/migrations ./migrations
 # Copy UI files
 COPY --from=backend-build /app/ui/build ./ui/build
 
+# Copy agent binaries (both architectures) — served by the backend
+# at GET /api/v1/system/agent?arch=amd64|arm64
+COPY --from=agent-build /agent-binaries ./agent-binaries
+
 # Copy .env file (with fallback to .env.production.example)
 COPY backend/.env* /app/
 RUN if [ ! -f /app/.env ]; then \
@@ -268,14 +311,19 @@ window.__RUNTIME_CONFIG__ = {
   IS_CLOUD: '\${IS_CLOUD:-false}',
   GITHUB_CLIENT_ID: '\${GITHUB_CLIENT_ID:-}',
   GOOGLE_CLIENT_ID: '\${GOOGLE_CLIENT_ID:-}',
-  IS_EMAIL_CONFIGURED: '\$IS_EMAIL_CONFIGURED'
+  IS_EMAIL_CONFIGURED: '\$IS_EMAIL_CONFIGURED',
+  CLOUDFLARE_TURNSTILE_SITE_KEY: '\${CLOUDFLARE_TURNSTILE_SITE_KEY:-}',
+  CONTAINER_ARCH: '\${CONTAINER_ARCH:-unknown}'
 };
 JSEOF
 
-# Inject analytics script if provided
+# Inject analytics script if provided (only if not already injected)
 if [ -n "\${ANALYTICS_SCRIPT:-}" ]; then
-  echo "Injecting analytics script..."
-  sed -i "s#</head>#  \${ANALYTICS_SCRIPT}\n  </head>#" /app/ui/build/index.html
+  if ! grep -q "rybbit.databasus.com" /app/ui/build/index.html 2>/dev/null; then
+    echo "Injecting analytics script..."
+    sed -i "s#</head>#  \${ANALYTICS_SCRIPT}\\
+  </head>#" /app/ui/build/index.html
+  fi
 fi
 
 # Ensure proper ownership of data directory
@@ -390,6 +438,8 @@ fi
 # Create database and set password for postgres user
 echo "Setting up database and user..."
 gosu postgres \$PG_BIN/psql -p 5437 -h localhost -d postgres << 'SQL'
+
+# We use stub password, because internal DB is not exposed outside container
 ALTER USER postgres WITH PASSWORD 'Q1234567';
 SELECT 'CREATE DATABASE databasus OWNER postgres'
 WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'databasus')
@@ -428,6 +478,8 @@ fi
 exec ./main
 EOF
 
+LABEL org.opencontainers.image.source="https://github.com/databasus/databasus"
+
 RUN chmod +x /app/start.sh
 
 EXPOSE 4005
@@ -436,4 +488,4 @@ EXPOSE 4005
 VOLUME ["/databasus-data"]
 
 ENTRYPOINT ["/app/start.sh"]
-CMD []
+CMD []

README.md

@@ -2,7 +2,7 @@
   <img src="assets/logo.svg" alt="Databasus Logo" width="250"/>
 
   <h3>Backup tool for PostgreSQL, MySQL and MongoDB</h3>
-  <p>Databasus is a free, open source and self-hosted tool to backup databases (with focus on PostgreSQL). Make backups with different storages (S3, Google Drive, FTP, etc.) and notifications about progress (Slack, Discord, Telegram, etc.). Previously known as Postgresus (see migration guide).</p>
+  <p>Databasus is a free, open source and self-hosted tool to backup databases (with focus on PostgreSQL). Make backups with different storages (S3, Google Drive, FTP, etc.) and notifications about progress (Slack, Discord, Telegram, etc.)</p>
   
   <!-- Badges -->
    [![PostgreSQL](https://img.shields.io/badge/PostgreSQL-336791?logo=postgresql&logoColor=white)](https://www.postgresql.org/)
@@ -11,7 +11,7 @@
   [![MongoDB](https://img.shields.io/badge/MongoDB-47A248?logo=mongodb&logoColor=white)](https://www.mongodb.com/)
   <br />
   [![Apache 2.0 License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
-  [![Docker Pulls](https://img.shields.io/docker/pulls/rostislavdugin/postgresus?color=brightgreen)](https://hub.docker.com/r/rostislavdugin/postgresus)
+  [![Docker Pulls](https://img.shields.io/docker/pulls/databasus/databasus?color=brightgreen)](https://hub.docker.com/r/databasus/databasus)
   [![Platform](https://img.shields.io/badge/platform-linux%20%7C%20macos%20%7C%20windows-lightgrey)](https://github.com/databasus/databasus)
   [![Self Hosted](https://img.shields.io/badge/self--hosted-yes-brightgreen)](https://github.com/databasus/databasus)
   [![Open Source](https://img.shields.io/badge/open%20source-❤️-red)](https://github.com/databasus/databasus)
@@ -31,8 +31,6 @@
   <img src="assets/dashboard-dark.svg" alt="Databasus Dark Dashboard" width="800" style="margin-bottom: 10px;"/>
 
   <img src="assets/dashboard.svg" alt="Databasus Dashboard" width="800"/>
-  
- 
 </div>
 
 ---
@@ -43,7 +41,7 @@
 
 - **PostgreSQL**: 12, 13, 14, 15, 16, 17 and 18
 - **MySQL**: 5.7, 8 and 9
-- **MariaDB**: 10 and 11
+- **MariaDB**: 10, 11 and 12
 - **MongoDB**: 4, 5, 6, 7 and 8
 
 ### 🔄 **Scheduled backups**
@@ -52,6 +50,13 @@
 - **Precise timing**: run backups at specific times (e.g., 4 AM during low traffic)
 - **Smart compression**: 4-8x space savings with balanced compression (~20% overhead)
 
+### 🗑️ **Retention policies**
+
+- **Time period**: Keep backups for a fixed duration (e.g., 7 days, 3 months, 1 year)
+- **Count**: Keep a fixed number of the most recent backups (e.g., last 30)
+- **GFS (Grandfather-Father-Son)**: Layered retention — keep hourly, daily, weekly, monthly and yearly backups independently for fine-grained long-term history (enterprises requirement)
+- **Size limits**: Set per-backup and total storage size caps to control storage usage
+
 ### 🗄️ **Multiple storage destinations** <a href="https://databasus.com/storages">(view supported)</a>
 
 - **Local storage**: Keep backups on your VPS/server
@@ -71,6 +76,8 @@
 - **Encryption for secrets**: Any sensitive data is encrypted and never exposed, even in logs or error messages
 - **Read-only user**: Databasus uses a read-only user by default for backups and never stores anything that can modify your data
 
+It is also important for Databasus that you are able to decrypt and restore backups from storages (local, S3, etc.) without Databasus itself. To do so, read our guide on [how to recover directly from storage](https://databasus.com/how-to-recover-without-databasus). We avoid "vendor lock-in" even to open source tool!
+
 ### 👥 **Suitable for teams** <a href="https://databasus.com/access-management">(docs)</a>
 
 - **Workspaces**: Group databases, notifiers and storages for different projects or teams
@@ -220,8 +227,9 @@ For more options (NodePort, TLS, HTTPRoute for Gateway API), see the [Helm chart
 3. **Configure schedule**: Choose from hourly, daily, weekly, monthly or cron intervals
 4. **Set database connection**: Enter your database credentials and connection details
 5. **Choose storage**: Select where to store your backups (local, S3, Google Drive, etc.)
-6. **Add notifications** (optional): Configure email, Telegram, Slack, or webhook notifications
-7. **Save and start**: Databasus will validate settings and begin the backup schedule
+6. **Configure retention policy**: Choose time period, count or GFS to control how long backups are kept
+7. **Add notifications** (optional): Configure email, Telegram, Slack, or webhook notifications
+8. **Save and start**: Databasus will validate settings and begin the backup schedule
 
 ### 🔑 Resetting password <a href="https://databasus.com/password">(docs)</a>
 
@@ -233,66 +241,37 @@ docker exec -it databasus ./main --new-password="YourNewSecurePassword123" --ema
 
 Replace `admin` with the actual email address of the user whose password you want to reset.
 
+### 💾 Backuping Databasus itself
+
+After installation, it is also recommended to <a href="https://databasus.com/faq/#backup-databasus">backup your Databasus itself</a> or, at least, to copy secret key used for encryption (30 seconds is needed). So you are able to restore from your encrypted backups if you lose access to the server with Databasus or it is corrupted.
+
 ---
 
 ## 📝 License
 
 This project is licensed under the Apache 2.0 License - see the [LICENSE](LICENSE) file for details
 
----
-
 ## 🤝 Contributing
 
 Contributions are welcome! Read the <a href="https://databasus.com/contribute">contributing guide</a> for more details, priorities and rules. If you want to contribute but don't know where to start, message me on Telegram [@rostislav_dugin](https://t.me/rostislav_dugin)
 
 Also you can join our large community of developers, DBAs and DevOps engineers on Telegram [@databasus_community](https://t.me/databasus_community).
 
---
-
-## 📖 Migration guide
-
-Databasus is the new name for Postgresus. You can stay with latest version of Postgresus if you wish. If you want to migrate - follow installation steps for Databasus itself.
-
-Just renaming an image is not enough as Postgresus and Databasus use different data folders and internal database naming.
-
-You can put a new Databasus image with updated volume near the old Postgresus and run it (stop Postgresus before):
-
-```
-services:
-  databasus:
-    container_name: databasus
-    image: databasus/databasus:latest
-    ports:
-      - "4005:4005"
-    volumes:
-      - ./databasus-data:/databasus-data
-    restart: unless-stopped
-```
-
-Then manually move databases from Postgresus to Databasus.
-
-### Why was Postgresus renamed to Databasus?
-
-Databasus has been developed since 2023. It was internal tool to backup production and home projects databases. In start of 2025 it was released as open source project on GitHub. By the end of 2025 it became popular and the time for renaming has come in December 2025.
-
-It was an important step for the project to grow. Actually, there are a couple of reasons:
-
-1. Postgresus is no longer a little tool that just adds UI for pg_dump for little projects. It became a tool both for individual users, DevOps, DBAs, teams, companies and even large enterprises. Tens of thousands of users use Postgresus every day. Postgresus grew into a reliable backup management tool. Initial positioning is no longer suitable: the project is not just a UI wrapper, it's a solid backup management system now (despite it's still easy to use).
-
-2. New databases are supported: although the primary focus is PostgreSQL (with 100% support in the most efficient way) and always will be, Databasus added support for MySQL, MariaDB and MongoDB. Later more databases will be supported.
-
-3. Trademark issue: "postgres" is a trademark of PostgreSQL Inc. and cannot be used in the project name. So for safety and legal reasons, we had to rename the project.
-
 ## AI disclaimer
 
 There have been questions about AI usage in project development in issues and discussions. As the project focuses on security, reliability and production usage, it's important to explain how AI is used in the development process.
 
+First of all, we are proud to say that Databasus has been accepted into both [Claude for Open Source](https://claude.com/contact-sales/claude-for-oss) by Anthropic and [Codex for Open Source](https://developers.openai.com/codex/community/codex-for-oss/) by OpenAI in March 2026. For us it is one more signal that the project was recognized as important open-source software and was as critical infrastructure worth supporting independently by two of the world's leading AI companies. Read more at [databasus.com/faq](https://databasus.com/faq#oss-programs).
+
+Despite of this, we have the following rules how AI is used in the development process:
+
 AI is used as a helper for:
 
 - verification of code quality and searching for vulnerabilities
 - cleaning up and improving documentation, comments and code
 - assistance during development
 - double-checking PRs and commits after human review
+- additional security analysis of PRs via Codex Security
 
 AI is not used for:
 

agent/.env.example

@@ -0,0 +1 @@
+ENV_MODE=development

agent/.gitignore

@@ -0,0 +1,24 @@
+main
+.env
+docker-compose.yml
+!e2e/docker-compose.yml
+pgdata
+pgdata_test/
+mysqldata/
+mariadbdata/
+main.exe
+swagger/
+swagger/*
+swagger/docs.go
+swagger/swagger.json
+swagger/swagger.yaml
+postgresus-backend.exe
+databasus-backend.exe
+ui/build/*
+pgdata-for-restore/
+temp/
+cmd.exe
+temp/
+valkey-data/
+victoria-logs-data/
+databasus.json

agent/.golangci.yml

@@ -0,0 +1,41 @@
+version: "2"
+
+run:
+  timeout: 5m
+  tests: false
+  concurrency: 4
+
+linters:
+  default: standard
+  enable:
+    - funcorder
+    - bodyclose
+    - errorlint
+    - gocritic
+    - unconvert
+    - misspell
+    - errname
+    - noctx
+    - modernize
+
+  settings:
+    errcheck:
+      check-type-assertions: true
+
+formatters:
+  enable:
+    - gofumpt
+    - golines
+    - gci
+
+  settings:
+    golines:
+      max-len: 120
+    gofumpt:
+      module-path: databasus-agent
+      extra-rules: true
+    gci:
+      sections:
+        - standard
+        - default
+        - localmodule

agent/Makefile

@@ -0,0 +1,26 @@
+.PHONY: run build test lint e2e e2e-clean
+
+# Usage: make run ARGS="start --pg-host localhost"
+run:
+	go run cmd/main.go $(ARGS)
+
+build:
+	CGO_ENABLED=0 go build -ldflags "-X main.Version=$(VERSION)" -o databasus-agent ./cmd/main.go
+
+test:
+	go test -count=1 -failfast ./internal/...
+
+lint:
+	golangci-lint fmt ./cmd/... ./internal/... ./e2e/... && golangci-lint run ./cmd/... ./internal/... ./e2e/...
+
+e2e:
+	cd e2e && docker compose build
+	cd e2e && docker compose run --rm e2e-agent-builder
+	cd e2e && docker compose up -d e2e-postgres e2e-mock-server
+	cd e2e && docker compose run --rm e2e-agent-runner
+	cd e2e && docker compose run --rm e2e-agent-docker
+	cd e2e && docker compose down -v
+
+e2e-clean:
+	cd e2e && docker compose down -v --rmi local
+	rm -rf e2e/artifacts

agent/cmd/main.go

@@ -0,0 +1,170 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log/slog"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"databasus-agent/internal/config"
+	"databasus-agent/internal/features/start"
+	"databasus-agent/internal/features/upgrade"
+	"databasus-agent/internal/logger"
+)
+
+var Version = "dev"
+
+func main() {
+	if len(os.Args) < 2 {
+		printUsage()
+		os.Exit(1)
+	}
+
+	switch os.Args[1] {
+	case "start":
+		runStart(os.Args[2:])
+	case "stop":
+		runStop()
+	case "status":
+		runStatus()
+	case "restore":
+		runRestore(os.Args[2:])
+	case "version":
+		fmt.Println(Version)
+	default:
+		fmt.Fprintf(os.Stderr, "unknown command: %s\n", os.Args[1])
+		printUsage()
+		os.Exit(1)
+	}
+}
+
+func runStart(args []string) {
+	fs := flag.NewFlagSet("start", flag.ExitOnError)
+
+	isDebug := fs.Bool("debug", false, "Enable debug logging")
+	isSkipUpdate := fs.Bool("skip-update", false, "Skip auto-update check")
+
+	cfg := &config.Config{}
+	cfg.LoadFromJSONAndArgs(fs, args)
+
+	if err := cfg.SaveToJSON(); err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to save config: %v\n", err)
+	}
+
+	logger.Init(*isDebug)
+	log := logger.GetLogger()
+
+	isDev := checkIsDevelopment()
+	runUpdateCheck(cfg.DatabasusHost, *isSkipUpdate, isDev, log)
+
+	if err := start.Run(cfg, log); err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+}
+
+func runStop() {
+	logger.Init(false)
+	logger.GetLogger().Info("stop: stub — not yet implemented")
+}
+
+func runStatus() {
+	logger.Init(false)
+	logger.GetLogger().Info("status: stub — not yet implemented")
+}
+
+func runRestore(args []string) {
+	fs := flag.NewFlagSet("restore", flag.ExitOnError)
+
+	targetDir := fs.String("target-dir", "", "Target pgdata directory")
+	backupID := fs.String("backup-id", "", "Full backup UUID (optional)")
+	targetTime := fs.String("target-time", "", "PITR target time in RFC3339 (optional)")
+	isYes := fs.Bool("yes", false, "Skip confirmation prompt")
+	isDebug := fs.Bool("debug", false, "Enable debug logging")
+	isSkipUpdate := fs.Bool("skip-update", false, "Skip auto-update check")
+
+	cfg := &config.Config{}
+	cfg.LoadFromJSONAndArgs(fs, args)
+
+	if err := cfg.SaveToJSON(); err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to save config: %v\n", err)
+	}
+
+	logger.Init(*isDebug)
+	log := logger.GetLogger()
+
+	isDev := checkIsDevelopment()
+	runUpdateCheck(cfg.DatabasusHost, *isSkipUpdate, isDev, log)
+
+	log.Info("restore: stub — not yet implemented",
+		"targetDir", *targetDir,
+		"backupId", *backupID,
+		"targetTime", *targetTime,
+		"yes", *isYes,
+	)
+}
+
+func printUsage() {
+	fmt.Fprintln(os.Stderr, "Usage: databasus-agent <command> [flags]")
+	fmt.Fprintln(os.Stderr, "")
+	fmt.Fprintln(os.Stderr, "Commands:")
+	fmt.Fprintln(os.Stderr, "  start    Start the agent (WAL archiving + basebackups)")
+	fmt.Fprintln(os.Stderr, "  stop     Stop a running agent")
+	fmt.Fprintln(os.Stderr, "  status   Show agent status")
+	fmt.Fprintln(os.Stderr, "  restore  Restore a database from backup")
+	fmt.Fprintln(os.Stderr, "  version  Print agent version")
+}
+
+func runUpdateCheck(host string, isSkipUpdate, isDev bool, log *slog.Logger) {
+	if isSkipUpdate {
+		return
+	}
+
+	if host == "" {
+		return
+	}
+
+	if err := upgrade.CheckAndUpdate(host, Version, isDev, log); err != nil {
+		log.Error("Auto-update failed", "error", err)
+		os.Exit(1)
+	}
+}
+
+func checkIsDevelopment() bool {
+	dir, err := os.Getwd()
+	if err != nil {
+		return false
+	}
+
+	for range 3 {
+		if data, err := os.ReadFile(filepath.Join(dir, ".env")); err == nil {
+			return parseEnvMode(data)
+		}
+
+		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
+			return false
+		}
+
+		dir = filepath.Dir(dir)
+	}
+
+	return false
+}
+
+func parseEnvMode(data []byte) bool {
+	for line := range strings.SplitSeq(string(data), "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		parts := strings.SplitN(line, "=", 2)
+		if len(parts) == 2 && strings.TrimSpace(parts[0]) == "ENV_MODE" {
+			return strings.TrimSpace(parts[1]) == "development"
+		}
+	}
+
+	return false
+}

agent/e2e/.gitignore

@@ -0,0 +1 @@
+artifacts/

agent/e2e/Dockerfile.agent-builder

@@ -0,0 +1,13 @@
+# Builds agent binaries with different versions so
+# we can test upgrade behavior (v1 -> v2)
+FROM golang:1.26.1-alpine AS build
+WORKDIR /src
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 go build -ldflags "-X main.Version=v1.0.0" -o /out/agent-v1 ./cmd/main.go
+RUN CGO_ENABLED=0 go build -ldflags "-X main.Version=v2.0.0" -o /out/agent-v2 ./cmd/main.go
+
+FROM alpine:3.21
+COPY --from=build /out/ /out/
+CMD ["cp", "-v", "/out/agent-v1", "/out/agent-v2", "/artifacts/"]

agent/e2e/Dockerfile.agent-docker

@@ -0,0 +1,8 @@
+# Runs pg_basebackup-via-docker-exec test (test 5) which tests
+# that the agent can connect to Postgres inside Docker container
+FROM docker:27-cli
+
+RUN apk add --no-cache bash curl
+
+WORKDIR /tmp
+ENTRYPOINT []

agent/e2e/Dockerfile.agent-runner

@@ -0,0 +1,14 @@
+# Runs upgrade and host-mode pg_basebackup tests (tests 1-4). Needs
+# Postgres client tools to be installed inside the system
+FROM debian:bookworm-slim
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+      ca-certificates curl gnupg2 postgresql-common && \
+    /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh -y && \
+    apt-get install -y --no-install-recommends \
+      postgresql-client-17 && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /tmp
+ENTRYPOINT []

agent/e2e/Dockerfile.mock-server

@@ -0,0 +1,10 @@
+# Mock databasus API server for version checks and binary downloads. Just
+# serves static responses and files from the `artifacts` directory.
+FROM golang:1.26.1-alpine AS build
+WORKDIR /app
+COPY mock-server/main.go .
+RUN CGO_ENABLED=0 go build -o mock-server main.go
+
+FROM alpine:3.21
+COPY --from=build /app/mock-server /usr/local/bin/mock-server
+ENTRYPOINT ["mock-server"]

agent/e2e/docker-compose.yml

@@ -0,0 +1,64 @@
+services:
+  e2e-agent-builder:
+    build:
+      context: ..
+      dockerfile: e2e/Dockerfile.agent-builder
+    volumes:
+      - ./artifacts:/artifacts
+    container_name: e2e-agent-builder
+
+  e2e-postgres:
+    image: postgres:17
+    environment:
+      POSTGRES_DB: testdb
+      POSTGRES_USER: testuser
+      POSTGRES_PASSWORD: testpassword
+    container_name: e2e-agent-postgres
+    command: postgres -c wal_level=replica -c max_wal_senders=3
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U testuser -d testdb"]
+      interval: 2s
+      timeout: 5s
+      retries: 30
+
+  e2e-mock-server:
+    build:
+      context: .
+      dockerfile: Dockerfile.mock-server
+    volumes:
+      - ./artifacts:/artifacts:ro
+    container_name: e2e-mock-server
+    healthcheck:
+      test: ["CMD", "wget", "-q", "--spider", "http://localhost:4050/health"]
+      interval: 2s
+      timeout: 5s
+      retries: 10
+
+  e2e-agent-runner:
+    build:
+      context: .
+      dockerfile: Dockerfile.agent-runner
+    volumes:
+      - ./artifacts:/opt/agent/artifacts:ro
+      - ./scripts:/opt/agent/scripts:ro
+    depends_on:
+      e2e-postgres:
+        condition: service_healthy
+      e2e-mock-server:
+        condition: service_healthy
+    container_name: e2e-agent-runner
+    command: ["bash", "/opt/agent/scripts/run-all.sh", "host"]
+
+  e2e-agent-docker:
+    build:
+      context: .
+      dockerfile: Dockerfile.agent-docker
+    volumes:
+      - ./artifacts:/opt/agent/artifacts:ro
+      - ./scripts:/opt/agent/scripts:ro
+      - /var/run/docker.sock:/var/run/docker.sock
+    depends_on:
+      e2e-postgres:
+        condition: service_healthy
+    container_name: e2e-agent-docker
+    command: ["bash", "/opt/agent/scripts/run-all.sh", "docker"]

agent/e2e/mock-server/main.go

@@ -0,0 +1,84 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"sync"
+)
+
+type server struct {
+	mu         sync.RWMutex
+	version    string
+	binaryPath string
+}
+
+func main() {
+	version := "v2.0.0"
+	binaryPath := "/artifacts/agent-v2"
+	port := "4050"
+
+	s := &server{version: version, binaryPath: binaryPath}
+
+	http.HandleFunc("/api/v1/system/version", s.handleVersion)
+	http.HandleFunc("/api/v1/system/agent", s.handleAgentDownload)
+	http.HandleFunc("/mock/set-version", s.handleSetVersion)
+	http.HandleFunc("/health", s.handleHealth)
+
+	addr := ":" + port
+	log.Printf("Mock server starting on %s (version=%s, binary=%s)", addr, version, binaryPath)
+
+	if err := http.ListenAndServe(addr, nil); err != nil {
+		log.Fatalf("Server failed: %v", err)
+	}
+}
+
+func (s *server) handleVersion(w http.ResponseWriter, r *http.Request) {
+	s.mu.RLock()
+	v := s.version
+	s.mu.RUnlock()
+
+	log.Printf("GET /api/v1/system/version -> %s", v)
+
+	w.Header().Set("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(map[string]string{"version": v})
+}
+
+func (s *server) handleAgentDownload(w http.ResponseWriter, r *http.Request) {
+	s.mu.RLock()
+	path := s.binaryPath
+	s.mu.RUnlock()
+
+	log.Printf("GET /api/v1/system/agent (arch=%s) -> serving %s", r.URL.Query().Get("arch"), path)
+
+	http.ServeFile(w, r, path)
+}
+
+func (s *server) handleSetVersion(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "POST only", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var body struct {
+		Version string `json:"version"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	s.mu.Lock()
+	s.version = body.Version
+	s.mu.Unlock()
+
+	log.Printf("POST /mock/set-version -> %s", body.Version)
+
+	_, _ = fmt.Fprintf(w, "version set to %s", body.Version)
+}
+
+func (s *server) handleHealth(w http.ResponseWriter, _ *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	_, _ = w.Write([]byte("ok"))
+}

agent/e2e/scripts/run-all.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+set -euo pipefail
+
+MODE="${1:-host}"
+SCRIPT_DIR="$(dirname "$0")"
+PASSED=0
+FAILED=0
+
+run_test() {
+  local name="$1"
+  local script="$2"
+
+  echo ""
+  echo "========================================"
+  echo "  $name"
+  echo "========================================"
+
+  if bash "$script"; then
+    echo "  PASSED: $name"
+    PASSED=$((PASSED + 1))
+  else
+    echo "  FAILED: $name"
+    FAILED=$((FAILED + 1))
+  fi
+}
+
+if [ "$MODE" = "host" ]; then
+  run_test "Test 1: Upgrade success (v1 -> v2)" "$SCRIPT_DIR/test-upgrade-success.sh"
+  run_test "Test 2: Upgrade skip (version matches)" "$SCRIPT_DIR/test-upgrade-skip.sh"
+  run_test "Test 3: pg_basebackup in PATH" "$SCRIPT_DIR/test-pg-host-path.sh"
+  run_test "Test 4: pg_basebackup via bindir" "$SCRIPT_DIR/test-pg-host-bindir.sh"
+
+elif [ "$MODE" = "docker" ]; then
+  run_test "Test 5: pg_basebackup via docker exec" "$SCRIPT_DIR/test-pg-docker-exec.sh"
+
+else
+  echo "Unknown mode: $MODE (expected 'host' or 'docker')"
+  exit 1
+fi
+
+echo ""
+echo "========================================"
+echo "  Results: $PASSED passed, $FAILED failed"
+echo "========================================"
+
+if [ "$FAILED" -gt 0 ]; then
+  exit 1
+fi

agent/e2e/scripts/test-pg-docker-exec.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+set -euo pipefail
+
+ARTIFACTS="/opt/agent/artifacts"
+AGENT="/tmp/test-agent"
+PG_CONTAINER="e2e-agent-postgres"
+
+# Copy agent binary
+cp "$ARTIFACTS/agent-v1" "$AGENT"
+chmod +x "$AGENT"
+
+# Verify docker CLI works and PG container is accessible
+if ! docker exec "$PG_CONTAINER" pg_basebackup --version > /dev/null 2>&1; then
+  echo "FAIL: Cannot reach pg_basebackup inside container $PG_CONTAINER (test setup issue)"
+  exit 1
+fi
+
+# Run start with --skip-update and pg-type=docker
+echo "Running agent start (pg_basebackup via docker exec)..."
+OUTPUT=$("$AGENT" start \
+  --skip-update \
+  --databasus-host http://e2e-mock-server:4050 \
+  --db-id test-db-id \
+  --token test-token \
+  --pg-host e2e-postgres \
+  --pg-port 5432 \
+  --pg-user testuser \
+  --pg-password testpassword \
+  --wal-dir /tmp/wal \
+  --pg-type docker \
+  --pg-docker-container-name "$PG_CONTAINER" 2>&1)
+
+EXIT_CODE=$?
+echo "$OUTPUT"
+
+if [ "$EXIT_CODE" -ne 0 ]; then
+  echo "FAIL: Agent exited with code $EXIT_CODE"
+  exit 1
+fi
+
+if ! echo "$OUTPUT" | grep -q "pg_basebackup verified (docker)"; then
+  echo "FAIL: Expected output to contain 'pg_basebackup verified (docker)'"
+  exit 1
+fi
+
+if ! echo "$OUTPUT" | grep -q "PostgreSQL connection verified"; then
+  echo "FAIL: Expected output to contain 'PostgreSQL connection verified'"
+  exit 1
+fi
+
+echo "pg_basebackup found via docker exec and DB connection verified"

agent/e2e/scripts/test-pg-host-bindir.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+set -euo pipefail
+
+ARTIFACTS="/opt/agent/artifacts"
+AGENT="/tmp/test-agent"
+CUSTOM_BIN_DIR="/opt/pg/bin"
+
+# Copy agent binary
+cp "$ARTIFACTS/agent-v1" "$AGENT"
+chmod +x "$AGENT"
+
+# Move pg_basebackup out of PATH into custom directory
+mkdir -p "$CUSTOM_BIN_DIR"
+cp "$(which pg_basebackup)" "$CUSTOM_BIN_DIR/pg_basebackup"
+
+# Hide the system one by prepending an empty dir to PATH
+export PATH="/opt/empty-path:$PATH"
+mkdir -p /opt/empty-path
+
+# Verify pg_basebackup is NOT directly callable from default location
+# (we copied it, but the original is still there in debian — so we test
+# that the agent uses the custom dir, not PATH, by checking the output)
+
+# Run start with --skip-update and custom bin dir
+echo "Running agent start (pg_basebackup via --pg-host-bin-dir)..."
+OUTPUT=$("$AGENT" start \
+  --skip-update \
+  --databasus-host http://e2e-mock-server:4050 \
+  --db-id test-db-id \
+  --token test-token \
+  --pg-host e2e-postgres \
+  --pg-port 5432 \
+  --pg-user testuser \
+  --pg-password testpassword \
+  --wal-dir /tmp/wal \
+  --pg-type host \
+  --pg-host-bin-dir "$CUSTOM_BIN_DIR" 2>&1)
+
+EXIT_CODE=$?
+echo "$OUTPUT"
+
+if [ "$EXIT_CODE" -ne 0 ]; then
+  echo "FAIL: Agent exited with code $EXIT_CODE"
+  exit 1
+fi
+
+if ! echo "$OUTPUT" | grep -q "pg_basebackup verified"; then
+  echo "FAIL: Expected output to contain 'pg_basebackup verified'"
+  exit 1
+fi
+
+if ! echo "$OUTPUT" | grep -q "PostgreSQL connection verified"; then
+  echo "FAIL: Expected output to contain 'PostgreSQL connection verified'"
+  exit 1
+fi
+
+echo "pg_basebackup found via custom bin dir and DB connection verified"

agent/e2e/scripts/test-pg-host-path.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+set -euo pipefail
+
+ARTIFACTS="/opt/agent/artifacts"
+AGENT="/tmp/test-agent"
+
+# Copy agent binary
+cp "$ARTIFACTS/agent-v1" "$AGENT"
+chmod +x "$AGENT"
+
+# Verify pg_basebackup is in PATH
+if ! which pg_basebackup > /dev/null 2>&1; then
+  echo "FAIL: pg_basebackup not found in PATH (test setup issue)"
+  exit 1
+fi
+
+# Run start with --skip-update and pg-type=host
+echo "Running agent start (pg_basebackup in PATH)..."
+OUTPUT=$("$AGENT" start \
+  --skip-update \
+  --databasus-host http://e2e-mock-server:4050 \
+  --db-id test-db-id \
+  --token test-token \
+  --pg-host e2e-postgres \
+  --pg-port 5432 \
+  --pg-user testuser \
+  --pg-password testpassword \
+  --wal-dir /tmp/wal \
+  --pg-type host 2>&1)
+
+EXIT_CODE=$?
+echo "$OUTPUT"
+
+if [ "$EXIT_CODE" -ne 0 ]; then
+  echo "FAIL: Agent exited with code $EXIT_CODE"
+  exit 1
+fi
+
+if ! echo "$OUTPUT" | grep -q "pg_basebackup verified"; then
+  echo "FAIL: Expected output to contain 'pg_basebackup verified'"
+  exit 1
+fi
+
+if ! echo "$OUTPUT" | grep -q "PostgreSQL connection verified"; then
+  echo "FAIL: Expected output to contain 'PostgreSQL connection verified'"
+  exit 1
+fi
+
+echo "pg_basebackup found in PATH and DB connection verified"

agent/e2e/scripts/test-upgrade-skip.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+set -euo pipefail
+
+ARTIFACTS="/opt/agent/artifacts"
+AGENT="/tmp/test-agent"
+
+# Set mock server to return v1.0.0 (same as agent)
+curl -sf -X POST http://e2e-mock-server:4050/mock/set-version \
+  -H "Content-Type: application/json" \
+  -d '{"version":"v1.0.0"}'
+
+# Copy v1 binary to writable location
+cp "$ARTIFACTS/agent-v1" "$AGENT"
+chmod +x "$AGENT"
+
+# Verify initial version
+VERSION=$("$AGENT" version)
+if [ "$VERSION" != "v1.0.0" ]; then
+  echo "FAIL: Expected initial version v1.0.0, got $VERSION"
+  exit 1
+fi
+
+# Run start — agent should see version matches and skip upgrade
+echo "Running agent start (expecting upgrade skip)..."
+OUTPUT=$("$AGENT" start \
+  --databasus-host http://e2e-mock-server:4050 \
+  --db-id test-db-id \
+  --token test-token \
+  --pg-host e2e-postgres \
+  --pg-port 5432 \
+  --pg-user testuser \
+  --pg-password testpassword \
+  --wal-dir /tmp/wal \
+  --pg-type host 2>&1) || true
+
+echo "$OUTPUT"
+
+# Verify output contains "up to date"
+if ! echo "$OUTPUT" | grep -qi "up to date"; then
+  echo "FAIL: Expected output to contain 'up to date'"
+  exit 1
+fi
+
+# Verify binary is still v1
+VERSION=$("$AGENT" version)
+if [ "$VERSION" != "v1.0.0" ]; then
+  echo "FAIL: Expected version v1.0.0 (unchanged), got $VERSION"
+  exit 1
+fi
+
+echo "Upgrade correctly skipped, version still $VERSION"

agent/e2e/scripts/test-upgrade-success.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+set -euo pipefail
+
+ARTIFACTS="/opt/agent/artifacts"
+AGENT="/tmp/test-agent"
+
+# Ensure mock server returns v2.0.0
+curl -sf -X POST http://e2e-mock-server:4050/mock/set-version \
+  -H "Content-Type: application/json" \
+  -d '{"version":"v2.0.0"}'
+
+# Copy v1 binary to writable location
+cp "$ARTIFACTS/agent-v1" "$AGENT"
+chmod +x "$AGENT"
+
+# Verify initial version
+VERSION=$("$AGENT" version)
+if [ "$VERSION" != "v1.0.0" ]; then
+  echo "FAIL: Expected initial version v1.0.0, got $VERSION"
+  exit 1
+fi
+echo "Initial version: $VERSION"
+
+# Run start — agent will:
+# 1. Fetch version from mock (v2.0.0 != v1.0.0)
+# 2. Download v2 binary from mock
+# 3. Replace itself on disk
+# 4. Re-exec with same args
+# 5. Re-exec'd v2 fetches version (v2.0.0 == v2.0.0) → skips update
+# 6. Proceeds to start → verifies pg_basebackup + DB → exits 0 (stub)
+echo "Running agent start (expecting upgrade v1 -> v2)..."
+OUTPUT=$("$AGENT" start \
+  --databasus-host http://e2e-mock-server:4050 \
+  --db-id test-db-id \
+  --token test-token \
+  --pg-host e2e-postgres \
+  --pg-port 5432 \
+  --pg-user testuser \
+  --pg-password testpassword \
+  --wal-dir /tmp/wal \
+  --pg-type host 2>&1) || true
+
+echo "$OUTPUT"
+
+# Verify binary on disk is now v2
+VERSION=$("$AGENT" version)
+if [ "$VERSION" != "v2.0.0" ]; then
+  echo "FAIL: Expected upgraded version v2.0.0, got $VERSION"
+  exit 1
+fi
+
+echo "Binary upgraded successfully to $VERSION"

agent/go.mod

@@ -0,0 +1,19 @@
+module databasus-agent
+
+go 1.26.1
+
+require (
+	github.com/jackc/pgx/v5 v5.8.0
+	github.com/stretchr/testify v1.11.1
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rogpeppe/go-internal v1.14.1 // indirect
+	golang.org/x/text v0.29.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

agent/go.sum

@@ -0,0 +1,35 @@
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.8.0 h1:TYPDoleBBme0xGSAX3/+NujXXtpZn9HBONkQC7IEZSo=
+github.com/jackc/pgx/v5 v5.8.0/go.mod h1:QVeDInX2m9VyzvNeiCJVjCkNFqzsNb43204HshNSZKw=
+github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
+github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
+github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
+golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
+golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

agent/internal/config/config.go

@@ -0,0 +1,267 @@
+package config
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"os"
+
+	"databasus-agent/internal/logger"
+)
+
+var log = logger.GetLogger()
+
+const configFileName = "databasus.json"
+
+type Config struct {
+	DatabasusHost          string `json:"databasusHost"`
+	DbID                   string `json:"dbId"`
+	Token                  string `json:"token"`
+	PgHost                 string `json:"pgHost"`
+	PgPort                 int    `json:"pgPort"`
+	PgUser                 string `json:"pgUser"`
+	PgPassword             string `json:"pgPassword"`
+	PgType                 string `json:"pgType"`
+	PgHostBinDir           string `json:"pgHostBinDir"`
+	PgDockerContainerName  string `json:"pgDockerContainerName"`
+	WalDir                 string `json:"walDir"`
+	IsDeleteWalAfterUpload *bool  `json:"deleteWalAfterUpload"`
+
+	flags parsedFlags
+}
+
+// LoadFromJSONAndArgs reads databasus.json into the struct
+// and overrides JSON values with any explicitly provided CLI flags.
+func (c *Config) LoadFromJSONAndArgs(fs *flag.FlagSet, args []string) {
+	c.loadFromJSON()
+	c.applyDefaults()
+	c.initSources()
+
+	c.flags.databasusHost = fs.String(
+		"databasus-host",
+		"",
+		"Databasus server URL (e.g. http://your-server:4005)",
+	)
+	c.flags.dbID = fs.String("db-id", "", "Database ID")
+	c.flags.token = fs.String("token", "", "Agent token")
+	c.flags.pgHost = fs.String("pg-host", "", "PostgreSQL host")
+	c.flags.pgPort = fs.Int("pg-port", 0, "PostgreSQL port")
+	c.flags.pgUser = fs.String("pg-user", "", "PostgreSQL user")
+	c.flags.pgPassword = fs.String("pg-password", "", "PostgreSQL password")
+	c.flags.pgType = fs.String("pg-type", "", "PostgreSQL type: host or docker")
+	c.flags.pgHostBinDir = fs.String("pg-host-bin-dir", "", "Path to PG bin directory (host mode)")
+	c.flags.pgDockerContainerName = fs.String("pg-docker-container-name", "", "Docker container name (docker mode)")
+	c.flags.walDir = fs.String("wal-dir", "", "Path to WAL queue directory")
+
+	if err := fs.Parse(args); err != nil {
+		os.Exit(1)
+	}
+
+	c.applyFlags()
+	log.Info("========= Loading config ============")
+	c.logConfigSources()
+	log.Info("========= Config has been loaded ====")
+}
+
+// SaveToJSON writes the current struct to databasus.json.
+func (c *Config) SaveToJSON() error {
+	data, err := json.MarshalIndent(c, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(configFileName, data, 0o644)
+}
+
+func (c *Config) loadFromJSON() {
+	data, err := os.ReadFile(configFileName)
+	if err != nil {
+		if os.IsNotExist(err) {
+			log.Info("No databasus.json found, will create on save")
+			return
+		}
+
+		log.Warn("Failed to read databasus.json", "error", err)
+
+		return
+	}
+
+	if err := json.Unmarshal(data, c); err != nil {
+		log.Warn("Failed to parse databasus.json", "error", err)
+
+		return
+	}
+
+	log.Info("Configuration loaded from " + configFileName)
+}
+
+func (c *Config) applyDefaults() {
+	if c.PgPort == 0 {
+		c.PgPort = 5432
+	}
+
+	if c.PgType == "" {
+		c.PgType = "host"
+	}
+
+	if c.IsDeleteWalAfterUpload == nil {
+		v := true
+		c.IsDeleteWalAfterUpload = &v
+	}
+}
+
+func (c *Config) initSources() {
+	c.flags.sources = map[string]string{
+		"databasus-host":           "not configured",
+		"db-id":                    "not configured",
+		"token":                    "not configured",
+		"pg-host":                  "not configured",
+		"pg-port":                  "not configured",
+		"pg-user":                  "not configured",
+		"pg-password":              "not configured",
+		"pg-type":                  "not configured",
+		"pg-host-bin-dir":          "not configured",
+		"pg-docker-container-name": "not configured",
+		"wal-dir":                  "not configured",
+		"delete-wal-after-upload":  "not configured",
+	}
+
+	if c.DatabasusHost != "" {
+		c.flags.sources["databasus-host"] = configFileName
+	}
+
+	if c.DbID != "" {
+		c.flags.sources["db-id"] = configFileName
+	}
+
+	if c.Token != "" {
+		c.flags.sources["token"] = configFileName
+	}
+
+	if c.PgHost != "" {
+		c.flags.sources["pg-host"] = configFileName
+	}
+
+	// PgPort always has a value after applyDefaults
+	c.flags.sources["pg-port"] = configFileName
+
+	if c.PgUser != "" {
+		c.flags.sources["pg-user"] = configFileName
+	}
+
+	if c.PgPassword != "" {
+		c.flags.sources["pg-password"] = configFileName
+	}
+
+	// PgType always has a value after applyDefaults
+	c.flags.sources["pg-type"] = configFileName
+
+	if c.PgHostBinDir != "" {
+		c.flags.sources["pg-host-bin-dir"] = configFileName
+	}
+
+	if c.PgDockerContainerName != "" {
+		c.flags.sources["pg-docker-container-name"] = configFileName
+	}
+
+	if c.WalDir != "" {
+		c.flags.sources["wal-dir"] = configFileName
+	}
+
+	// IsDeleteWalAfterUpload always has a value after applyDefaults
+	c.flags.sources["delete-wal-after-upload"] = configFileName
+}
+
+func (c *Config) applyFlags() {
+	if c.flags.databasusHost != nil && *c.flags.databasusHost != "" {
+		c.DatabasusHost = *c.flags.databasusHost
+		c.flags.sources["databasus-host"] = "command line args"
+	}
+
+	if c.flags.dbID != nil && *c.flags.dbID != "" {
+		c.DbID = *c.flags.dbID
+		c.flags.sources["db-id"] = "command line args"
+	}
+
+	if c.flags.token != nil && *c.flags.token != "" {
+		c.Token = *c.flags.token
+		c.flags.sources["token"] = "command line args"
+	}
+
+	if c.flags.pgHost != nil && *c.flags.pgHost != "" {
+		c.PgHost = *c.flags.pgHost
+		c.flags.sources["pg-host"] = "command line args"
+	}
+
+	if c.flags.pgPort != nil && *c.flags.pgPort != 0 {
+		c.PgPort = *c.flags.pgPort
+		c.flags.sources["pg-port"] = "command line args"
+	}
+
+	if c.flags.pgUser != nil && *c.flags.pgUser != "" {
+		c.PgUser = *c.flags.pgUser
+		c.flags.sources["pg-user"] = "command line args"
+	}
+
+	if c.flags.pgPassword != nil && *c.flags.pgPassword != "" {
+		c.PgPassword = *c.flags.pgPassword
+		c.flags.sources["pg-password"] = "command line args"
+	}
+
+	if c.flags.pgType != nil && *c.flags.pgType != "" {
+		c.PgType = *c.flags.pgType
+		c.flags.sources["pg-type"] = "command line args"
+	}
+
+	if c.flags.pgHostBinDir != nil && *c.flags.pgHostBinDir != "" {
+		c.PgHostBinDir = *c.flags.pgHostBinDir
+		c.flags.sources["pg-host-bin-dir"] = "command line args"
+	}
+
+	if c.flags.pgDockerContainerName != nil && *c.flags.pgDockerContainerName != "" {
+		c.PgDockerContainerName = *c.flags.pgDockerContainerName
+		c.flags.sources["pg-docker-container-name"] = "command line args"
+	}
+
+	if c.flags.walDir != nil && *c.flags.walDir != "" {
+		c.WalDir = *c.flags.walDir
+		c.flags.sources["wal-dir"] = "command line args"
+	}
+}
+
+func (c *Config) logConfigSources() {
+	log.Info("databasus-host", "value", c.DatabasusHost, "source", c.flags.sources["databasus-host"])
+	log.Info("db-id", "value", c.DbID, "source", c.flags.sources["db-id"])
+	log.Info("token", "value", maskSensitive(c.Token), "source", c.flags.sources["token"])
+	log.Info("pg-host", "value", c.PgHost, "source", c.flags.sources["pg-host"])
+	log.Info("pg-port", "value", c.PgPort, "source", c.flags.sources["pg-port"])
+	log.Info("pg-user", "value", c.PgUser, "source", c.flags.sources["pg-user"])
+	log.Info("pg-password", "value", maskSensitive(c.PgPassword), "source", c.flags.sources["pg-password"])
+	log.Info("pg-type", "value", c.PgType, "source", c.flags.sources["pg-type"])
+	log.Info("pg-host-bin-dir", "value", c.PgHostBinDir, "source", c.flags.sources["pg-host-bin-dir"])
+	log.Info(
+		"pg-docker-container-name",
+		"value",
+		c.PgDockerContainerName,
+		"source",
+		c.flags.sources["pg-docker-container-name"],
+	)
+	log.Info("wal-dir", "value", c.WalDir, "source", c.flags.sources["wal-dir"])
+	log.Info(
+		"delete-wal-after-upload",
+		"value",
+		fmt.Sprintf("%v", *c.IsDeleteWalAfterUpload),
+		"source",
+		c.flags.sources["delete-wal-after-upload"],
+	)
+}
+
+func maskSensitive(value string) string {
+	if value == "" {
+		return "(not set)"
+	}
+
+	visibleLen := max(len(value)/4, 1)
+
+	return value[:visibleLen] + "***"
+}

agent/internal/config/config_test.go

@@ -0,0 +1,301 @@
+package config
+
+import (
+	"encoding/json"
+	"flag"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_LoadFromJSONAndArgs_ValuesLoadedFromJSON(t *testing.T) {
+	dir := setupTempDir(t)
+	writeConfigJSON(t, dir, Config{
+		DatabasusHost: "http://json-host:4005",
+		DbID:          "json-db-id",
+		Token:         "json-token",
+	})
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{})
+
+	assert.Equal(t, "http://json-host:4005", cfg.DatabasusHost)
+	assert.Equal(t, "json-db-id", cfg.DbID)
+	assert.Equal(t, "json-token", cfg.Token)
+}
+
+func Test_LoadFromJSONAndArgs_ValuesLoadedFromArgs_WhenNoJSON(t *testing.T) {
+	setupTempDir(t)
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{
+		"--databasus-host", "http://arg-host:4005",
+		"--db-id", "arg-db-id",
+		"--token", "arg-token",
+	})
+
+	assert.Equal(t, "http://arg-host:4005", cfg.DatabasusHost)
+	assert.Equal(t, "arg-db-id", cfg.DbID)
+	assert.Equal(t, "arg-token", cfg.Token)
+}
+
+func Test_LoadFromJSONAndArgs_ArgsOverrideJSON(t *testing.T) {
+	dir := setupTempDir(t)
+	writeConfigJSON(t, dir, Config{
+		DatabasusHost: "http://json-host:4005",
+		DbID:          "json-db-id",
+		Token:         "json-token",
+	})
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{
+		"--databasus-host", "http://arg-host:9999",
+		"--db-id", "arg-db-id-override",
+		"--token", "arg-token-override",
+	})
+
+	assert.Equal(t, "http://arg-host:9999", cfg.DatabasusHost)
+	assert.Equal(t, "arg-db-id-override", cfg.DbID)
+	assert.Equal(t, "arg-token-override", cfg.Token)
+}
+
+func Test_LoadFromJSONAndArgs_PartialArgsOverrideJSON(t *testing.T) {
+	dir := setupTempDir(t)
+	writeConfigJSON(t, dir, Config{
+		DatabasusHost: "http://json-host:4005",
+		DbID:          "json-db-id",
+		Token:         "json-token",
+	})
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{
+		"--databasus-host", "http://arg-host-only:4005",
+	})
+
+	assert.Equal(t, "http://arg-host-only:4005", cfg.DatabasusHost)
+	assert.Equal(t, "json-db-id", cfg.DbID)
+	assert.Equal(t, "json-token", cfg.Token)
+}
+
+func Test_SaveToJSON_ConfigSavedCorrectly(t *testing.T) {
+	setupTempDir(t)
+
+	deleteWal := true
+	cfg := &Config{
+		DatabasusHost:          "http://save-host:4005",
+		DbID:                   "save-db-id",
+		Token:                  "save-token",
+		IsDeleteWalAfterUpload: &deleteWal,
+	}
+
+	err := cfg.SaveToJSON()
+	require.NoError(t, err)
+
+	saved := readConfigJSON(t)
+
+	assert.Equal(t, "http://save-host:4005", saved.DatabasusHost)
+	assert.Equal(t, "save-db-id", saved.DbID)
+	assert.Equal(t, "save-token", saved.Token)
+}
+
+func Test_SaveToJSON_AfterArgsOverrideJSON_SavedFileContainsMergedValues(t *testing.T) {
+	dir := setupTempDir(t)
+	writeConfigJSON(t, dir, Config{
+		DatabasusHost: "http://json-host:4005",
+		DbID:          "json-db-id",
+		Token:         "json-token",
+	})
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{
+		"--databasus-host", "http://override-host:9999",
+	})
+
+	err := cfg.SaveToJSON()
+	require.NoError(t, err)
+
+	saved := readConfigJSON(t)
+
+	assert.Equal(t, "http://override-host:9999", saved.DatabasusHost)
+	assert.Equal(t, "json-db-id", saved.DbID)
+	assert.Equal(t, "json-token", saved.Token)
+}
+
+func Test_LoadFromJSONAndArgs_PgFieldsLoadedFromJSON(t *testing.T) {
+	dir := setupTempDir(t)
+	deleteWal := false
+	writeConfigJSON(t, dir, Config{
+		DatabasusHost:          "http://json-host:4005",
+		DbID:                   "json-db-id",
+		Token:                  "json-token",
+		PgHost:                 "pg-json-host",
+		PgPort:                 5433,
+		PgUser:                 "pg-json-user",
+		PgPassword:             "pg-json-pass",
+		PgType:                 "docker",
+		PgHostBinDir:           "/usr/bin",
+		PgDockerContainerName:  "pg-container",
+		WalDir:                 "/opt/wal",
+		IsDeleteWalAfterUpload: &deleteWal,
+	})
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{})
+
+	assert.Equal(t, "pg-json-host", cfg.PgHost)
+	assert.Equal(t, 5433, cfg.PgPort)
+	assert.Equal(t, "pg-json-user", cfg.PgUser)
+	assert.Equal(t, "pg-json-pass", cfg.PgPassword)
+	assert.Equal(t, "docker", cfg.PgType)
+	assert.Equal(t, "/usr/bin", cfg.PgHostBinDir)
+	assert.Equal(t, "pg-container", cfg.PgDockerContainerName)
+	assert.Equal(t, "/opt/wal", cfg.WalDir)
+	assert.Equal(t, false, *cfg.IsDeleteWalAfterUpload)
+}
+
+func Test_LoadFromJSONAndArgs_PgFieldsLoadedFromArgs(t *testing.T) {
+	setupTempDir(t)
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{
+		"--pg-host", "arg-pg-host",
+		"--pg-port", "5433",
+		"--pg-user", "arg-pg-user",
+		"--pg-password", "arg-pg-pass",
+		"--pg-type", "docker",
+		"--pg-host-bin-dir", "/custom/bin",
+		"--pg-docker-container-name", "my-pg",
+		"--wal-dir", "/var/wal",
+	})
+
+	assert.Equal(t, "arg-pg-host", cfg.PgHost)
+	assert.Equal(t, 5433, cfg.PgPort)
+	assert.Equal(t, "arg-pg-user", cfg.PgUser)
+	assert.Equal(t, "arg-pg-pass", cfg.PgPassword)
+	assert.Equal(t, "docker", cfg.PgType)
+	assert.Equal(t, "/custom/bin", cfg.PgHostBinDir)
+	assert.Equal(t, "my-pg", cfg.PgDockerContainerName)
+	assert.Equal(t, "/var/wal", cfg.WalDir)
+}
+
+func Test_LoadFromJSONAndArgs_PgArgsOverrideJSON(t *testing.T) {
+	dir := setupTempDir(t)
+	writeConfigJSON(t, dir, Config{
+		PgHost: "json-host",
+		PgPort: 5432,
+		PgUser: "json-user",
+		PgType: "host",
+		WalDir: "/json/wal",
+	})
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{
+		"--pg-host", "arg-host",
+		"--pg-port", "5433",
+		"--pg-user", "arg-user",
+		"--pg-type", "docker",
+		"--pg-docker-container-name", "my-container",
+		"--wal-dir", "/arg/wal",
+	})
+
+	assert.Equal(t, "arg-host", cfg.PgHost)
+	assert.Equal(t, 5433, cfg.PgPort)
+	assert.Equal(t, "arg-user", cfg.PgUser)
+	assert.Equal(t, "docker", cfg.PgType)
+	assert.Equal(t, "my-container", cfg.PgDockerContainerName)
+	assert.Equal(t, "/arg/wal", cfg.WalDir)
+}
+
+func Test_LoadFromJSONAndArgs_DefaultsApplied_WhenNoJSONAndNoArgs(t *testing.T) {
+	setupTempDir(t)
+
+	cfg := &Config{}
+	fs := flag.NewFlagSet("test", flag.ContinueOnError)
+	cfg.LoadFromJSONAndArgs(fs, []string{})
+
+	assert.Equal(t, 5432, cfg.PgPort)
+	assert.Equal(t, "host", cfg.PgType)
+	require.NotNil(t, cfg.IsDeleteWalAfterUpload)
+	assert.Equal(t, true, *cfg.IsDeleteWalAfterUpload)
+}
+
+func Test_SaveToJSON_PgFieldsSavedCorrectly(t *testing.T) {
+	setupTempDir(t)
+
+	deleteWal := false
+	cfg := &Config{
+		DatabasusHost:          "http://host:4005",
+		DbID:                   "db-id",
+		Token:                  "token",
+		PgHost:                 "pg-host",
+		PgPort:                 5433,
+		PgUser:                 "pg-user",
+		PgPassword:             "pg-pass",
+		PgType:                 "docker",
+		PgHostBinDir:           "/usr/bin",
+		PgDockerContainerName:  "pg-container",
+		WalDir:                 "/opt/wal",
+		IsDeleteWalAfterUpload: &deleteWal,
+	}
+
+	err := cfg.SaveToJSON()
+	require.NoError(t, err)
+
+	saved := readConfigJSON(t)
+
+	assert.Equal(t, "pg-host", saved.PgHost)
+	assert.Equal(t, 5433, saved.PgPort)
+	assert.Equal(t, "pg-user", saved.PgUser)
+	assert.Equal(t, "pg-pass", saved.PgPassword)
+	assert.Equal(t, "docker", saved.PgType)
+	assert.Equal(t, "/usr/bin", saved.PgHostBinDir)
+	assert.Equal(t, "pg-container", saved.PgDockerContainerName)
+	assert.Equal(t, "/opt/wal", saved.WalDir)
+	require.NotNil(t, saved.IsDeleteWalAfterUpload)
+	assert.Equal(t, false, *saved.IsDeleteWalAfterUpload)
+}
+
+func setupTempDir(t *testing.T) string {
+	t.Helper()
+
+	origDir, err := os.Getwd()
+	require.NoError(t, err)
+
+	dir := t.TempDir()
+	require.NoError(t, os.Chdir(dir))
+
+	t.Cleanup(func() { os.Chdir(origDir) })
+
+	return dir
+}
+
+func writeConfigJSON(t *testing.T, dir string, cfg Config) {
+	t.Helper()
+
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	require.NoError(t, err)
+
+	require.NoError(t, os.WriteFile(dir+"/"+configFileName, data, 0o644))
+}
+
+func readConfigJSON(t *testing.T) Config {
+	t.Helper()
+
+	data, err := os.ReadFile(configFileName)
+	require.NoError(t, err)
+
+	var cfg Config
+	require.NoError(t, json.Unmarshal(data, &cfg))
+
+	return cfg
+}

agent/internal/config/dto.go

@@ -0,0 +1,17 @@
+package config
+
+type parsedFlags struct {
+	databasusHost         *string
+	dbID                  *string
+	token                 *string
+	pgHost                *string
+	pgPort                *int
+	pgUser                *string
+	pgPassword            *string
+	pgType                *string
+	pgHostBinDir          *string
+	pgDockerContainerName *string
+	walDir                *string
+
+	sources map[string]string
+}

agent/internal/features/start/start.go

@@ -0,0 +1,179 @@
+package start
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log/slog"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+
+	"databasus-agent/internal/config"
+)
+
+const (
+	pgBasebackupVerifyTimeout = 10 * time.Second
+	dbVerifyTimeout           = 10 * time.Second
+)
+
+func Run(cfg *config.Config, log *slog.Logger) error {
+	if err := validateConfig(cfg); err != nil {
+		return err
+	}
+
+	if err := verifyPgBasebackup(cfg, log); err != nil {
+		return err
+	}
+
+	if err := verifyDatabase(cfg, log); err != nil {
+		return err
+	}
+
+	log.Info("start: stub — not yet implemented",
+		"dbId", cfg.DbID,
+		"hasToken", cfg.Token != "",
+	)
+
+	return nil
+}
+
+func validateConfig(cfg *config.Config) error {
+	if cfg.DatabasusHost == "" {
+		return errors.New("argument databasus-host is required")
+	}
+
+	if cfg.DbID == "" {
+		return errors.New("argument db-id is required")
+	}
+
+	if cfg.Token == "" {
+		return errors.New("argument token is required")
+	}
+
+	if cfg.PgHost == "" {
+		return errors.New("argument pg-host is required")
+	}
+
+	if cfg.PgPort <= 0 {
+		return errors.New("argument pg-port must be a positive number")
+	}
+
+	if cfg.PgUser == "" {
+		return errors.New("argument pg-user is required")
+	}
+
+	if cfg.PgType != "host" && cfg.PgType != "docker" {
+		return fmt.Errorf("argument pg-type must be 'host' or 'docker', got '%s'", cfg.PgType)
+	}
+
+	if cfg.WalDir == "" {
+		return errors.New("argument wal-dir is required")
+	}
+
+	if cfg.PgType == "docker" && cfg.PgDockerContainerName == "" {
+		return errors.New("argument pg-docker-container-name is required when pg-type is 'docker'")
+	}
+
+	return nil
+}
+
+func verifyPgBasebackup(cfg *config.Config, log *slog.Logger) error {
+	switch cfg.PgType {
+	case "host":
+		return verifyPgBasebackupHost(cfg, log)
+	case "docker":
+		return verifyPgBasebackupDocker(cfg, log)
+	default:
+		return fmt.Errorf("unexpected pg-type: %s", cfg.PgType)
+	}
+}
+
+func verifyPgBasebackupHost(cfg *config.Config, log *slog.Logger) error {
+	binary := "pg_basebackup"
+	if cfg.PgHostBinDir != "" {
+		binary = filepath.Join(cfg.PgHostBinDir, "pg_basebackup")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), pgBasebackupVerifyTimeout)
+	defer cancel()
+
+	output, err := exec.CommandContext(ctx, binary, "--version").CombinedOutput()
+	if err != nil {
+		if cfg.PgHostBinDir != "" {
+			return fmt.Errorf(
+				"pg_basebackup not found at '%s': %w. Verify pg-host-bin-dir is correct",
+				binary, err,
+			)
+		}
+
+		return fmt.Errorf(
+			"pg_basebackup not found in PATH: %w. Install PostgreSQL client tools or set pg-host-bin-dir",
+			err,
+		)
+	}
+
+	log.Info("pg_basebackup verified", "version", strings.TrimSpace(string(output)))
+
+	return nil
+}
+
+func verifyPgBasebackupDocker(cfg *config.Config, log *slog.Logger) error {
+	ctx, cancel := context.WithTimeout(context.Background(), pgBasebackupVerifyTimeout)
+	defer cancel()
+
+	output, err := exec.CommandContext(ctx,
+		"docker", "exec", cfg.PgDockerContainerName,
+		"pg_basebackup", "--version",
+	).CombinedOutput()
+	if err != nil {
+		return fmt.Errorf(
+			"pg_basebackup not available in container '%s': %w. "+
+				"Check that the container is running and pg_basebackup is installed inside it",
+			cfg.PgDockerContainerName, err,
+		)
+	}
+
+	log.Info("pg_basebackup verified (docker)",
+		"container", cfg.PgDockerContainerName,
+		"version", strings.TrimSpace(string(output)),
+	)
+
+	return nil
+}
+
+func verifyDatabase(cfg *config.Config, log *slog.Logger) error {
+	connStr := fmt.Sprintf(
+		"host=%s port=%d user=%s password=%s dbname=postgres sslmode=disable",
+		cfg.PgHost, cfg.PgPort, cfg.PgUser, cfg.PgPassword,
+	)
+
+	ctx, cancel := context.WithTimeout(context.Background(), dbVerifyTimeout)
+	defer cancel()
+
+	conn, err := pgx.Connect(ctx, connStr)
+	if err != nil {
+		return fmt.Errorf(
+			"failed to connect to PostgreSQL at %s:%d as user '%s': %w",
+			cfg.PgHost, cfg.PgPort, cfg.PgUser, err,
+		)
+	}
+	defer func() { _ = conn.Close(ctx) }()
+
+	if err := conn.Ping(ctx); err != nil {
+		return fmt.Errorf("PostgreSQL ping failed at %s:%d: %w",
+			cfg.PgHost, cfg.PgPort, err,
+		)
+	}
+
+	log.Info("PostgreSQL connection verified",
+		"host", cfg.PgHost,
+		"port", cfg.PgPort,
+		"user", cfg.PgUser,
+	)
+
+	return nil
+}

agent/internal/features/upgrade/dto.go

@@ -0,0 +1,5 @@
+package upgrade
+
+type versionResponse struct {
+	Version string `json:"version"`
+}

agent/internal/features/upgrade/upgrader.go

@@ -0,0 +1,154 @@
+package upgrade
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+	"syscall"
+	"time"
+)
+
+func CheckAndUpdate(databasusHost, currentVersion string, isDev bool, log *slog.Logger) error {
+	if isDev {
+		log.Info("Skipping update check (development mode)")
+		return nil
+	}
+
+	serverVersion, err := fetchServerVersion(databasusHost, log)
+	if err != nil {
+		return fmt.Errorf(
+			"unable to check version, please verify Databasus server is available at %s: %w",
+			databasusHost,
+			err,
+		)
+	}
+
+	if serverVersion == currentVersion {
+		log.Info("Agent version is up to date", "version", currentVersion)
+		return nil
+	}
+
+	log.Info("Updating agent...", "current", currentVersion, "target", serverVersion)
+
+	selfPath, err := os.Executable()
+	if err != nil {
+		return fmt.Errorf("failed to determine executable path: %w", err)
+	}
+
+	tempPath := selfPath + ".update"
+
+	defer func() {
+		_ = os.Remove(tempPath)
+	}()
+
+	if err := downloadBinary(databasusHost, tempPath); err != nil {
+		return fmt.Errorf("failed to download update: %w", err)
+	}
+
+	if err := os.Chmod(tempPath, 0o755); err != nil {
+		return fmt.Errorf("failed to set permissions on update: %w", err)
+	}
+
+	if err := verifyBinary(tempPath, serverVersion); err != nil {
+		return fmt.Errorf("update verification failed: %w", err)
+	}
+
+	if err := os.Rename(tempPath, selfPath); err != nil {
+		return fmt.Errorf("failed to replace binary (try --skip-update if this persists): %w", err)
+	}
+
+	log.Info("Update complete, re-executing...")
+
+	return syscall.Exec(selfPath, os.Args, os.Environ())
+}
+
+func fetchServerVersion(host string, log *slog.Logger) (string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	client := &http.Client{Timeout: 10 * time.Second}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, host+"/api/v1/system/version", nil)
+	if err != nil {
+		return "", err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		log.Warn("Could not reach server for update check, continuing", "error", err)
+		return "", err
+	}
+	defer func() { _ = resp.Body.Close() }()
+
+	if resp.StatusCode != http.StatusOK {
+		log.Warn(
+			"Server returned non-OK status for version check, continuing",
+			"status",
+			resp.StatusCode,
+		)
+		return "", fmt.Errorf("status %d", resp.StatusCode)
+	}
+
+	var ver versionResponse
+	if err := json.NewDecoder(resp.Body).Decode(&ver); err != nil {
+		log.Warn("Failed to parse server version response, continuing", "error", err)
+		return "", err
+	}
+
+	return ver.Version, nil
+}
+
+func downloadBinary(host, destPath string) error {
+	url := fmt.Sprintf("%s/api/v1/system/agent?arch=%s", host, runtime.GOARCH)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Minute)
+	defer cancel()
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return err
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = resp.Body.Close() }()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("server returned %d for agent download", resp.StatusCode)
+	}
+
+	f, err := os.Create(destPath)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = f.Close() }()
+
+	_, err = io.Copy(f, resp.Body)
+
+	return err
+}
+
+func verifyBinary(binaryPath, expectedVersion string) error {
+	cmd := exec.CommandContext(context.Background(), binaryPath, "version")
+
+	output, err := cmd.Output()
+	if err != nil {
+		return fmt.Errorf("binary failed to execute: %w", err)
+	}
+
+	got := strings.TrimSpace(string(output))
+	if got != expectedVersion {
+		return fmt.Errorf("version mismatch: expected %q, got %q", expectedVersion, got)
+	}
+
+	return nil
+}

agent/internal/logger/logger.go

@@ -0,0 +1,45 @@
+package logger
+
+import (
+	"log/slog"
+	"os"
+	"sync"
+	"time"
+)
+
+var (
+	loggerInstance *slog.Logger
+	once           sync.Once
+)
+
+func Init(isDebug bool) {
+	level := slog.LevelInfo
+	if isDebug {
+		level = slog.LevelDebug
+	}
+
+	once.Do(func() {
+		loggerInstance = slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
+			Level: level,
+			ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+				if a.Key == slog.TimeKey {
+					a.Value = slog.StringValue(time.Now().Format("2006/01/02 15:04:05"))
+				}
+				if a.Key == slog.LevelKey {
+					return slog.Attr{}
+				}
+
+				return a
+			},
+		}))
+	})
+}
+
+// GetLogger returns a singleton slog.Logger that logs to the console
+func GetLogger() *slog.Logger {
+	if loggerInstance == nil {
+		Init(false)
+	}
+
+	return loggerInstance
+}

backend/.env.development.example

@@ -11,6 +11,9 @@ VICTORIA_LOGS_PASSWORD=devpassword
 # tests
 TEST_LOCALHOST=localhost
 IS_SKIP_EXTERNAL_RESOURCES_TESTS=false
+# cloudflare turnstile
+CLOUDFLARE_TURNSTILE_SITE_KEY=
+CLOUDFLARE_TURNSTILE_SECRET_KEY=
 # db
 DATABASE_DSN=host=dev-db user=postgres password=Q1234567 dbname=databasus port=5437 sslmode=disable
 DATABASE_URL=postgres://postgres:Q1234567@dev-db:5437/databasus?sslmode=disable

backend/.golangci.yml

@@ -7,6 +7,16 @@ run:
 
 linters:
   default: standard
+  enable:
+    - funcorder
+    - bodyclose
+    - errorlint
+    - gocritic
+    - unconvert
+    - misspell
+    - errname
+    - noctx
+    - modernize
 
   settings:
     errcheck:
@@ -14,6 +24,18 @@ linters:
 
 formatters:
   enable:
-    - gofmt
+    - gofumpt
     - golines
-    - goimports
+    - gci
+
+  settings:
+    golines:
+      max-len: 120
+    gofumpt:
+      module-path: databasus-backend
+      extra-rules: true
+    gci:
+      sections:
+        - standard
+        - default
+        - localmodule

backend/cmd/main.go

@@ -12,11 +12,18 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/gin-contrib/cors"
+	"github.com/gin-contrib/gzip"
+	"github.com/gin-gonic/gin"
+	swaggerFiles "github.com/swaggo/files"
+	ginSwagger "github.com/swaggo/gin-swagger"
+
 	"databasus-backend/internal/config"
 	"databasus-backend/internal/features/audit_logs"
-	"databasus-backend/internal/features/backups/backups"
 	"databasus-backend/internal/features/backups/backups/backuping"
+	backups_controllers "databasus-backend/internal/features/backups/backups/controllers"
 	backups_download "databasus-backend/internal/features/backups/backups/download"
+	backups_services "databasus-backend/internal/features/backups/backups/services"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
 	"databasus-backend/internal/features/disk"
@@ -27,7 +34,9 @@ import (
 	"databasus-backend/internal/features/restores"
 	"databasus-backend/internal/features/restores/restoring"
 	"databasus-backend/internal/features/storages"
+	system_agent "databasus-backend/internal/features/system/agent"
 	system_healthcheck "databasus-backend/internal/features/system/healthcheck"
+	system_version "databasus-backend/internal/features/system/version"
 	task_cancellation "databasus-backend/internal/features/tasks/cancellation"
 	users_controllers "databasus-backend/internal/features/users/controllers"
 	users_middleware "databasus-backend/internal/features/users/middleware"
@@ -38,12 +47,6 @@ import (
 	files_utils "databasus-backend/internal/util/files"
 	"databasus-backend/internal/util/logger"
 	_ "databasus-backend/swagger" // swagger docs
-
-	"github.com/gin-contrib/cors"
-	"github.com/gin-contrib/gzip"
-	"github.com/gin-gonic/gin"
-	swaggerFiles "github.com/swaggo/files"
-	ginSwagger "github.com/swaggo/gin-swagger"
 )
 
 // @title Databasus Backend API
@@ -80,7 +83,6 @@ func main() {
 		config.GetEnv().TempFolder,
 		config.GetEnv().DataFolder,
 	})
-
 	if err != nil {
 		log.Error("Failed to ensure directories", "error", err)
 		os.Exit(1)
@@ -147,7 +149,7 @@ func handlePasswordReset(log *slog.Logger) {
 	resetPassword(*email, *newPassword, log)
 }
 
-func resetPassword(email string, newPassword string, log *slog.Logger) {
+func resetPassword(email, newPassword string, log *slog.Logger) {
 	log.Info("Resetting password...")
 
 	userService := users_services.GetUserService()
@@ -209,7 +211,11 @@ func setUpRoutes(r *gin.Engine) {
 	userController := users_controllers.GetUserController()
 	userController.RegisterRoutes(v1)
 	system_healthcheck.GetHealthcheckController().RegisterRoutes(v1)
-	backups.GetBackupController().RegisterPublicRoutes(v1)
+	system_version.GetVersionController().RegisterRoutes(v1)
+	system_agent.GetAgentController().RegisterRoutes(v1)
+	backups_controllers.GetBackupController().RegisterPublicRoutes(v1)
+	backups_controllers.GetPostgresWalBackupController().RegisterRoutes(v1)
+	databases.GetDatabaseController().RegisterPublicRoutes(v1)
 
 	// Setup auth middleware
 	userService := users_services.GetUserService()
@@ -226,7 +232,7 @@ func setUpRoutes(r *gin.Engine) {
 	notifiers.GetNotifierController().RegisterRoutes(protected)
 	storages.GetStorageController().RegisterRoutes(protected)
 	databases.GetDatabaseController().RegisterRoutes(protected)
-	backups.GetBackupController().RegisterRoutes(protected)
+	backups_controllers.GetBackupController().RegisterRoutes(protected)
 	restores.GetRestoreController().RegisterRoutes(protected)
 	healthcheck_config.GetHealthcheckConfigController().RegisterRoutes(protected)
 	healthcheck_attempt.GetHealthcheckAttemptController().RegisterRoutes(protected)
@@ -238,7 +244,7 @@ func setUpRoutes(r *gin.Engine) {
 
 func setUpDependencies() {
 	databases.SetupDependencies()
-	backups.SetupDependencies()
+	backups_services.SetupDependencies()
 	restores.SetupDependencies()
 	healthcheck_config.SetupDependencies()
 	audit_logs.SetupDependencies()
@@ -347,7 +353,9 @@ func generateSwaggerDocs(log *slog.Logger) {
 		return
 	}
 
-	cmd := exec.Command("swag", "init", "-d", currentDir, "-g", "cmd/main.go", "-o", "swagger")
+	cmd := exec.CommandContext(
+		context.Background(), "swag", "init", "-d", currentDir, "-g", "cmd/main.go", "-o", "swagger",
+	)
 
 	output, err := cmd.CombinedOutput()
 	if err != nil {
@@ -361,7 +369,7 @@ func generateSwaggerDocs(log *slog.Logger) {
 func runMigrations(log *slog.Logger) {
 	log.Info("Running database migrations...")
 
-	cmd := exec.Command("goose", "-dir", "./migrations", "up")
+	cmd := exec.CommandContext(context.Background(), "goose", "-dir", "./migrations", "up")
 	cmd.Env = append(
 		os.Environ(),
 		"GOOSE_DRIVER=postgres",

backend/go.mod

@@ -1,6 +1,6 @@
 module databasus-backend
 
-go 1.24.9
+go 1.26.1
 
 require (
 	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.20.0

backend/internal/config/config.go

@@ -1,9 +1,6 @@
 package config
 
 import (
-	env_utils "databasus-backend/internal/util/env"
-	"databasus-backend/internal/util/logger"
-	"databasus-backend/internal/util/tools"
 	"os"
 	"path/filepath"
 	"strings"
@@ -11,6 +8,10 @@ import (
 
 	"github.com/ilyakaznacheev/cleanenv"
 	"github.com/joho/godotenv"
+
+	env_utils "databasus-backend/internal/util/env"
+	"databasus-backend/internal/util/logger"
+	"databasus-backend/internal/util/tools"
 )
 
 var log = logger.GetLogger()
@@ -29,7 +30,7 @@ type EnvVariables struct {
 	MongodbInstallDir    string            `env:"MONGODB_INSTALL_DIR"`
 
 	// Internal database
-	DatabaseDsn string `env:"DATABASE_DSN"    required:"true"`
+	DatabaseDsn string `env:"DATABASE_DSN" required:"true"`
 	// Internal Valkey
 	ValkeyHost     string `env:"VALKEY_HOST"     required:"true"`
 	ValkeyPort     string `env:"VALKEY_PORT"     required:"true"`
@@ -104,6 +105,10 @@ type EnvVariables struct {
 	GoogleClientID     string `env:"GOOGLE_CLIENT_ID"`
 	GoogleClientSecret string `env:"GOOGLE_CLIENT_SECRET"`
 
+	// Cloudflare Turnstile
+	CloudflareTurnstileSecretKey string `env:"CLOUDFLARE_TURNSTILE_SECRET_KEY"`
+	CloudflareTurnstileSiteKey   string `env:"CLOUDFLARE_TURNSTILE_SITE_KEY"`
+
 	// testing Telegram
 	TestTelegramBotToken string `env:"TEST_TELEGRAM_BOT_TOKEN"`
 	TestTelegramChatID   string `env:"TEST_TELEGRAM_CHAT_ID"`
@@ -120,6 +125,7 @@ type EnvVariables struct {
 	SMTPPort     int    `env:"SMTP_PORT"`
 	SMTPUser     string `env:"SMTP_USER"`
 	SMTPPassword string `env:"SMTP_PASSWORD"`
+	SMTPFrom     string `env:"SMTP_FROM"`
 
 	// Application URL (optional) - used for email links
 	DatabasusURL string `env:"DATABASUS_URL"`

backend/internal/features/audit_logs/background_service_test.go

@@ -1,17 +1,17 @@
 package audit_logs
 
 import (
-	"databasus-backend/internal/storage"
 	"fmt"
 	"testing"
 	"time"
 
-	user_enums "databasus-backend/internal/features/users/enums"
-	users_testing "databasus-backend/internal/features/users/testing"
-
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
 	"gorm.io/gorm"
+
+	user_enums "databasus-backend/internal/features/users/enums"
+	users_testing "databasus-backend/internal/features/users/testing"
+	"databasus-backend/internal/storage"
 )
 
 func Test_CleanOldAuditLogs_DeletesLogsOlderThanOneYear(t *testing.T) {

backend/internal/features/audit_logs/controller.go

@@ -4,10 +4,10 @@ import (
 	"errors"
 	"net/http"
 
-	user_models "databasus-backend/internal/features/users/models"
-
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
+
+	user_models "databasus-backend/internal/features/users/models"
 )
 
 type AuditLogController struct {

backend/internal/features/audit_logs/controller_test.go

@@ -6,15 +6,15 @@ import (
 	"testing"
 	"time"
 
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+
 	user_enums "databasus-backend/internal/features/users/enums"
 	users_middleware "databasus-backend/internal/features/users/middleware"
 	users_services "databasus-backend/internal/features/users/services"
 	users_testing "databasus-backend/internal/features/users/testing"
 	test_utils "databasus-backend/internal/util/testing"
-
-	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
-	"github.com/stretchr/testify/assert"
 )
 
 func Test_GetGlobalAuditLogs_WithDifferentUserRoles_EnforcesPermissionsCorrectly(t *testing.T) {

backend/internal/features/audit_logs/di.go

@@ -8,14 +8,18 @@ import (
 	"databasus-backend/internal/util/logger"
 )
 
-var auditLogRepository = &AuditLogRepository{}
-var auditLogService = &AuditLogService{
-	auditLogRepository,
-	logger.GetLogger(),
-}
+var (
+	auditLogRepository = &AuditLogRepository{}
+	auditLogService    = &AuditLogService{
+		auditLogRepository,
+		logger.GetLogger(),
+	}
+)
+
 var auditLogController = &AuditLogController{
 	auditLogService,
 }
+
 var auditLogBackgroundService = &AuditLogBackgroundService{
 	auditLogService: auditLogService,
 	logger:          logger.GetLogger(),

backend/internal/features/audit_logs/repository.go

@@ -1,10 +1,11 @@
 package audit_logs
 
 import (
-	"databasus-backend/internal/storage"
 	"time"
 
 	"github.com/google/uuid"
+
+	"databasus-backend/internal/storage"
 )
 
 type AuditLogRepository struct{}
@@ -21,7 +22,7 @@ func (r *AuditLogRepository) GetGlobal(
 	limit, offset int,
 	beforeDate *time.Time,
 ) ([]*AuditLogDTO, error) {
-	var auditLogs = make([]*AuditLogDTO, 0)
+	auditLogs := make([]*AuditLogDTO, 0)
 
 	sql := `
 		SELECT 
@@ -37,7 +38,7 @@ func (r *AuditLogRepository) GetGlobal(
 		LEFT JOIN users u ON al.user_id = u.id
 		LEFT JOIN workspaces w ON al.workspace_id = w.id`
 
-	args := []interface{}{}
+	args := []any{}
 
 	if beforeDate != nil {
 		sql += " WHERE al.created_at < ?"
@@ -57,7 +58,7 @@ func (r *AuditLogRepository) GetByUser(
 	limit, offset int,
 	beforeDate *time.Time,
 ) ([]*AuditLogDTO, error) {
-	var auditLogs = make([]*AuditLogDTO, 0)
+	auditLogs := make([]*AuditLogDTO, 0)
 
 	sql := `
 		SELECT 
@@ -74,7 +75,7 @@ func (r *AuditLogRepository) GetByUser(
 		LEFT JOIN workspaces w ON al.workspace_id = w.id
 		WHERE al.user_id = ?`
 
-	args := []interface{}{userID}
+	args := []any{userID}
 
 	if beforeDate != nil {
 		sql += " AND al.created_at < ?"
@@ -94,7 +95,7 @@ func (r *AuditLogRepository) GetByWorkspace(
 	limit, offset int,
 	beforeDate *time.Time,
 ) ([]*AuditLogDTO, error) {
-	var auditLogs = make([]*AuditLogDTO, 0)
+	auditLogs := make([]*AuditLogDTO, 0)
 
 	sql := `
 		SELECT 
@@ -111,7 +112,7 @@ func (r *AuditLogRepository) GetByWorkspace(
 		LEFT JOIN workspaces w ON al.workspace_id = w.id
 		WHERE al.workspace_id = ?`
 
-	args := []interface{}{workspaceID}
+	args := []any{workspaceID}
 
 	if beforeDate != nil {
 		sql += " AND al.created_at < ?"

backend/internal/features/audit_logs/service.go

@@ -4,10 +4,10 @@ import (
 	"log/slog"
 	"time"
 
+	"github.com/google/uuid"
+
 	user_enums "databasus-backend/internal/features/users/enums"
 	user_models "databasus-backend/internal/features/users/models"
-
-	"github.com/google/uuid"
 )
 
 type AuditLogService struct {

backend/internal/features/audit_logs/service_test.go

@@ -4,11 +4,11 @@ import (
 	"testing"
 	"time"
 
-	user_enums "databasus-backend/internal/features/users/enums"
-	users_testing "databasus-backend/internal/features/users/testing"
-
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
+
+	user_enums "databasus-backend/internal/features/users/enums"
+	users_testing "databasus-backend/internal/features/users/testing"
 )
 
 func Test_AuditLogs_WorkspaceSpecificLogs(t *testing.T) {

backend/internal/features/backups/backups/backuping/backuper.go

@@ -1,7 +1,9 @@
 package backuping
 
 import (
+	"bytes"
 	"context"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"log/slog"
@@ -196,7 +198,7 @@ func (n *BackuperNode) MakeBackup(backupID uuid.UUID, isCallNotifier bool) {
 
 	backupMetadata, err := n.createBackupUseCase.Execute(
 		ctx,
-		backup.ID,
+		backup,
 		backupConfig,
 		database,
 		storage,
@@ -263,7 +265,7 @@ func (n *BackuperNode) MakeBackup(backupID uuid.UUID, isCallNotifier bool) {
 			// Delete partial backup from storage
 			storage, storageErr := n.storageService.GetStorageByID(backup.StorageID)
 			if storageErr == nil {
-				if deleteErr := storage.DeleteFile(n.fieldEncryptor, backup.ID); deleteErr != nil {
+				if deleteErr := storage.DeleteFile(n.fieldEncryptor, backup.FileName); deleteErr != nil {
 					n.logger.Error(
 						"Failed to delete partial backup file",
 						"backupId",
@@ -311,6 +313,13 @@ func (n *BackuperNode) MakeBackup(backupID uuid.UUID, isCallNotifier bool) {
 
 	// Update backup with encryption metadata if provided
 	if backupMetadata != nil {
+		backupMetadata.BackupID = backup.ID
+
+		if err := backupMetadata.Validate(); err != nil {
+			n.logger.Error("Failed to validate backup metadata", "error", err)
+			return
+		}
+
 		backup.EncryptionSalt = backupMetadata.EncryptionSalt
 		backup.EncryptionIV = backupMetadata.EncryptionIV
 		backup.Encryption = backupMetadata.Encryption
@@ -321,6 +330,39 @@ func (n *BackuperNode) MakeBackup(backupID uuid.UUID, isCallNotifier bool) {
 		return
 	}
 
+	// Save metadata file to storage
+	if backupMetadata != nil {
+		metadataJSON, err := json.Marshal(backupMetadata)
+		if err != nil {
+			n.logger.Error("Failed to marshal backup metadata to JSON",
+				"backupId", backup.ID,
+				"error", err,
+			)
+		} else {
+			metadataReader := bytes.NewReader(metadataJSON)
+			metadataFileName := backup.FileName + ".metadata"
+
+			if err := storage.SaveFile(
+				context.Background(),
+				n.fieldEncryptor,
+				n.logger,
+				metadataFileName,
+				metadataReader,
+			); err != nil {
+				n.logger.Error("Failed to save backup metadata file to storage",
+					"backupId", backup.ID,
+					"fileName", metadataFileName,
+					"error", err,
+				)
+			} else {
+				n.logger.Info("Backup metadata file saved successfully",
+					"backupId", backup.ID,
+					"fileName", metadataFileName,
+				)
+			}
+		}
+	}
+
 	// Update database last backup time
 	now := time.Now().UTC()
 	if updateErr := n.databaseService.SetLastBackupTime(databaseID, now); updateErr != nil {

backend/internal/features/backups/backups/backuping/backuper_test.go

@@ -5,6 +5,9 @@ import (
 	"testing"
 	"time"
 
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -14,9 +17,6 @@ import (
 	users_testing "databasus-backend/internal/features/users/testing"
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
 	cache_utils "databasus-backend/internal/util/cache"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/mock"
 )
 
 func Test_BackupExecuted_NotificationSent(t *testing.T) {

backend/internal/features/backups/backups/backuping/cleaner.go

@@ -18,7 +18,8 @@ import (
 )
 
 const (
-	cleanerTickerInterval = 1 * time.Minute
+	cleanerTickerInterval   = 1 * time.Minute
+	recentBackupGracePeriod = 60 * time.Minute
 )
 
 type BackupCleaner struct {
@@ -51,8 +52,8 @@ func (c *BackupCleaner) Run(ctx context.Context) {
 			case <-ctx.Done():
 				return
 			case <-ticker.C:
-				if err := c.cleanOldBackups(); err != nil {
-					c.logger.Error("Failed to clean old backups", "error", err)
+				if err := c.cleanByRetentionPolicy(); err != nil {
+					c.logger.Error("Failed to clean backups by retention policy", "error", err)
 				}
 
 				if err := c.cleanExceededBackups(); err != nil {
@@ -79,8 +80,7 @@ func (c *BackupCleaner) DeleteBackup(backup *backups_core.Backup) error {
 		return err
 	}
 
-	err = storage.DeleteFile(c.fieldEncryptor, backup.ID)
-	if err != nil {
+	if err := storage.DeleteFile(c.fieldEncryptor, backup.FileName); err != nil {
 		// we do not return error here, because sometimes clean up performed
 		// before unavailable storage removal or change - therefore we should
 		// proceed even in case of error. It's possible that some S3 or
@@ -88,6 +88,11 @@ func (c *BackupCleaner) DeleteBackup(backup *backups_core.Backup) error {
 		c.logger.Error("Failed to delete backup file", "error", err)
 	}
 
+	metadataFileName := backup.FileName + ".metadata"
+	if err := storage.DeleteFile(c.fieldEncryptor, metadataFileName); err != nil {
+		c.logger.Error("Failed to delete backup metadata file", "error", err)
+	}
+
 	return c.backupRepository.DeleteByID(backup.ID)
 }
 
@@ -95,49 +100,30 @@ func (c *BackupCleaner) AddBackupRemoveListener(listener backups_core.BackupRemo
 	c.backupRemoveListeners = append(c.backupRemoveListeners, listener)
 }
 
-func (c *BackupCleaner) cleanOldBackups() error {
+func (c *BackupCleaner) cleanByRetentionPolicy() error {
 	enabledBackupConfigs, err := c.backupConfigService.GetBackupConfigsWithEnabledBackups()
 	if err != nil {
 		return err
 	}
 
 	for _, backupConfig := range enabledBackupConfigs {
-		backupStorePeriod := backupConfig.StorePeriod
+		var cleanErr error
 
-		if backupStorePeriod == period.PeriodForever {
-			continue
+		switch backupConfig.RetentionPolicyType {
+		case backups_config.RetentionPolicyTypeCount:
+			cleanErr = c.cleanByCount(backupConfig)
+		case backups_config.RetentionPolicyTypeGFS:
+			cleanErr = c.cleanByGFS(backupConfig)
+		default:
+			cleanErr = c.cleanByTimePeriod(backupConfig)
 		}
 
-		storeDuration := backupStorePeriod.ToDuration()
-		dateBeforeBackupsShouldBeDeleted := time.Now().UTC().Add(-storeDuration)
-
-		oldBackups, err := c.backupRepository.FindBackupsBeforeDate(
-			backupConfig.DatabaseID,
-			dateBeforeBackupsShouldBeDeleted,
-		)
-		if err != nil {
+		if cleanErr != nil {
 			c.logger.Error(
-				"Failed to find old backups for database",
-				"databaseId",
-				backupConfig.DatabaseID,
-				"error",
-				err,
-			)
-			continue
-		}
-
-		for _, backup := range oldBackups {
-			if err := c.DeleteBackup(backup); err != nil {
-				c.logger.Error("Failed to delete old backup", "backupId", backup.ID, "error", err)
-				continue
-			}
-
-			c.logger.Info(
-				"Deleted old backup",
-				"backupId",
-				backup.ID,
-				"databaseId",
-				backupConfig.DatabaseID,
+				"Failed to clean backups by retention policy",
+				"databaseId", backupConfig.DatabaseID,
+				"policy", backupConfig.RetentionPolicyType,
+				"error", cleanErr,
 			)
 		}
 	}
@@ -174,6 +160,158 @@ func (c *BackupCleaner) cleanExceededBackups() error {
 	return nil
 }
 
+func (c *BackupCleaner) cleanByTimePeriod(backupConfig *backups_config.BackupConfig) error {
+	if backupConfig.RetentionTimePeriod == "" {
+		return nil
+	}
+
+	if backupConfig.RetentionTimePeriod == period.PeriodForever {
+		return nil
+	}
+
+	storeDuration := backupConfig.RetentionTimePeriod.ToDuration()
+	dateBeforeBackupsShouldBeDeleted := time.Now().UTC().Add(-storeDuration)
+
+	oldBackups, err := c.backupRepository.FindBackupsBeforeDate(
+		backupConfig.DatabaseID,
+		dateBeforeBackupsShouldBeDeleted,
+	)
+	if err != nil {
+		return fmt.Errorf(
+			"failed to find old backups for database %s: %w",
+			backupConfig.DatabaseID,
+			err,
+		)
+	}
+
+	for _, backup := range oldBackups {
+		if isRecentBackup(backup) {
+			continue
+		}
+
+		if err := c.DeleteBackup(backup); err != nil {
+			c.logger.Error("Failed to delete old backup", "backupId", backup.ID, "error", err)
+			continue
+		}
+
+		c.logger.Info(
+			"Deleted old backup",
+			"backupId", backup.ID,
+			"databaseId", backupConfig.DatabaseID,
+		)
+	}
+
+	return nil
+}
+
+func (c *BackupCleaner) cleanByCount(backupConfig *backups_config.BackupConfig) error {
+	if backupConfig.RetentionCount <= 0 {
+		return nil
+	}
+
+	completedBackups, err := c.backupRepository.FindByDatabaseIdAndStatus(
+		backupConfig.DatabaseID,
+		backups_core.BackupStatusCompleted,
+	)
+	if err != nil {
+		return fmt.Errorf(
+			"failed to find completed backups for database %s: %w",
+			backupConfig.DatabaseID,
+			err,
+		)
+	}
+
+	// completedBackups are ordered newest first; delete everything beyond position RetentionCount
+	if len(completedBackups) <= backupConfig.RetentionCount {
+		return nil
+	}
+
+	toDelete := completedBackups[backupConfig.RetentionCount:]
+	for _, backup := range toDelete {
+		if isRecentBackup(backup) {
+			continue
+		}
+
+		if err := c.DeleteBackup(backup); err != nil {
+			c.logger.Error(
+				"Failed to delete backup by count policy",
+				"backupId",
+				backup.ID,
+				"error",
+				err,
+			)
+			continue
+		}
+
+		c.logger.Info(
+			"Deleted backup by count policy",
+			"backupId", backup.ID,
+			"databaseId", backupConfig.DatabaseID,
+			"retentionCount", backupConfig.RetentionCount,
+		)
+	}
+
+	return nil
+}
+
+func (c *BackupCleaner) cleanByGFS(backupConfig *backups_config.BackupConfig) error {
+	if backupConfig.RetentionGfsHours <= 0 && backupConfig.RetentionGfsDays <= 0 &&
+		backupConfig.RetentionGfsWeeks <= 0 && backupConfig.RetentionGfsMonths <= 0 &&
+		backupConfig.RetentionGfsYears <= 0 {
+		return nil
+	}
+
+	completedBackups, err := c.backupRepository.FindByDatabaseIdAndStatus(
+		backupConfig.DatabaseID,
+		backups_core.BackupStatusCompleted,
+	)
+	if err != nil {
+		return fmt.Errorf(
+			"failed to find completed backups for database %s: %w",
+			backupConfig.DatabaseID,
+			err,
+		)
+	}
+
+	keepSet := buildGFSKeepSet(
+		completedBackups,
+		backupConfig.RetentionGfsHours,
+		backupConfig.RetentionGfsDays,
+		backupConfig.RetentionGfsWeeks,
+		backupConfig.RetentionGfsMonths,
+		backupConfig.RetentionGfsYears,
+	)
+
+	for _, backup := range completedBackups {
+		if keepSet[backup.ID] {
+			continue
+		}
+
+		if isRecentBackup(backup) {
+			continue
+		}
+
+		if err := c.DeleteBackup(backup); err != nil {
+			c.logger.Error(
+				"Failed to delete backup by GFS policy",
+				"backupId",
+				backup.ID,
+				"error",
+				err,
+			)
+			continue
+		}
+
+		c.logger.Info(
+			"Deleted backup by GFS policy",
+			"backupId", backup.ID,
+			"databaseId", backupConfig.DatabaseID,
+		)
+	}
+
+	return nil
+}
+
 func (c *BackupCleaner) cleanExceededBackupsForDatabase(
 	databaseID uuid.UUID,
 	limitperDbMB int64,
@@ -210,6 +348,21 @@ func (c *BackupCleaner) cleanExceededBackupsForDatabase(
 		}
 
 		backup := oldestBackups[0]
+		if isRecentBackup(backup) {
+			c.logger.Warn(
+				"Oldest backup is too recent to delete, stopping size cleanup",
+				"databaseId",
+				databaseID,
+				"backupId",
+				backup.ID,
+				"totalSizeMB",
+				backupsTotalSizeMB,
+				"limitMB",
+				limitperDbMB,
+			)
+			break
+		}
+
 		if err := c.DeleteBackup(backup); err != nil {
 			c.logger.Error(
 				"Failed to delete exceeded backup",
@@ -240,3 +393,128 @@ func (c *BackupCleaner) cleanExceededBackupsForDatabase(
 
 	return nil
 }
+
+func isRecentBackup(backup *backups_core.Backup) bool {
+	return time.Since(backup.CreatedAt) < recentBackupGracePeriod
+}
+
+// buildGFSKeepSet determines which backups to retain under the GFS rotation scheme.
+// Backups must be sorted newest-first. A backup can fill multiple slots simultaneously
+// (e.g. the newest backup of a year also fills the monthly, weekly, daily, and hourly slot).
+func buildGFSKeepSet(
+	backups []*backups_core.Backup,
+	hours, days, weeks, months, years int,
+) map[uuid.UUID]bool {
+	keep := make(map[uuid.UUID]bool)
+
+	if len(backups) == 0 {
+		return keep
+	}
+
+	hoursSeen := make(map[string]bool)
+	daysSeen := make(map[string]bool)
+	weeksSeen := make(map[string]bool)
+	monthsSeen := make(map[string]bool)
+	yearsSeen := make(map[string]bool)
+
+	hoursKept, daysKept, weeksKept, monthsKept, yearsKept := 0, 0, 0, 0, 0
+
+	// Compute per-level time-window cutoffs so higher-frequency slots
+	// cannot absorb backups that belong to lower-frequency levels.
+	ref := backups[0].CreatedAt
+
+	rawHourlyCutoff := ref.Add(-time.Duration(hours) * time.Hour)
+	rawDailyCutoff := ref.Add(-time.Duration(days) * 24 * time.Hour)
+	rawWeeklyCutoff := ref.Add(-time.Duration(weeks) * 7 * 24 * time.Hour)
+	rawMonthlyCutoff := ref.AddDate(0, -months, 0)
+	rawYearlyCutoff := ref.AddDate(-years, 0, 0)
+
+	// Hierarchical capping: each level's window cannot extend further back
+	// than the nearest active lower-frequency level's window.
+	yearlyCutoff := rawYearlyCutoff
+
+	monthlyCutoff := rawMonthlyCutoff
+	if years > 0 {
+		monthlyCutoff = laterOf(monthlyCutoff, yearlyCutoff)
+	}
+
+	weeklyCutoff := rawWeeklyCutoff
+	if months > 0 {
+		weeklyCutoff = laterOf(weeklyCutoff, monthlyCutoff)
+	} else if years > 0 {
+		weeklyCutoff = laterOf(weeklyCutoff, yearlyCutoff)
+	}
+
+	dailyCutoff := rawDailyCutoff
+	switch {
+	case weeks > 0:
+		dailyCutoff = laterOf(dailyCutoff, weeklyCutoff)
+	case months > 0:
+		dailyCutoff = laterOf(dailyCutoff, monthlyCutoff)
+	case years > 0:
+		dailyCutoff = laterOf(dailyCutoff, yearlyCutoff)
+	}
+
+	hourlyCutoff := rawHourlyCutoff
+	switch {
+	case days > 0:
+		hourlyCutoff = laterOf(hourlyCutoff, dailyCutoff)
+	case weeks > 0:
+		hourlyCutoff = laterOf(hourlyCutoff, weeklyCutoff)
+	case months > 0:
+		hourlyCutoff = laterOf(hourlyCutoff, monthlyCutoff)
+	case years > 0:
+		hourlyCutoff = laterOf(hourlyCutoff, yearlyCutoff)
+	}
+
+	for _, backup := range backups {
+		t := backup.CreatedAt
+
+		hourKey := t.Format("2006-01-02-15")
+		dayKey := t.Format("2006-01-02")
+		weekYear, week := t.ISOWeek()
+		weekKey := fmt.Sprintf("%d-%02d", weekYear, week)
+		monthKey := t.Format("2006-01")
+		yearKey := t.Format("2006")
+
+		if hours > 0 && hoursKept < hours && !hoursSeen[hourKey] && t.After(hourlyCutoff) {
+			keep[backup.ID] = true
+			hoursSeen[hourKey] = true
+			hoursKept++
+		}
+
+		if days > 0 && daysKept < days && !daysSeen[dayKey] && t.After(dailyCutoff) {
+			keep[backup.ID] = true
+			daysSeen[dayKey] = true
+			daysKept++
+		}
+
+		if weeks > 0 && weeksKept < weeks && !weeksSeen[weekKey] && t.After(weeklyCutoff) {
+			keep[backup.ID] = true
+			weeksSeen[weekKey] = true
+			weeksKept++
+		}
+
+		if months > 0 && monthsKept < months && !monthsSeen[monthKey] && t.After(monthlyCutoff) {
+			keep[backup.ID] = true
+			monthsSeen[monthKey] = true
+			monthsKept++
+		}
+
+		if years > 0 && yearsKept < years && !yearsSeen[yearKey] && t.After(yearlyCutoff) {
+			keep[backup.ID] = true
+			yearsSeen[yearKey] = true
+			yearsKept++
+		}
+	}
+
+	return keep
+}
+
+func laterOf(a, b time.Time) time.Time {
+	if a.After(b) {
+		return a
+	}
+
+	return b
+}

backend/internal/features/backups/backups/backuping/cleaner_test.go

@@ -4,6 +4,9 @@ import (
 	"testing"
 	"time"
 
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -15,12 +18,9 @@ import (
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
 	"databasus-backend/internal/storage"
 	"databasus-backend/internal/util/period"
-
-	"github.com/google/uuid"
-	"github.com/stretchr/testify/assert"
 )
 
-func Test_CleanOldBackups_DeletesBackupsOlderThanStorePeriod(t *testing.T) {
+func Test_CleanOldBackups_DeletesBackupsOlderThanRetentionTimePeriod(t *testing.T) {
 	router := CreateTestRouter()
 	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
 	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
@@ -41,21 +41,20 @@ func Test_CleanOldBackups_DeletesBackupsOlderThanStorePeriod(t *testing.T) {
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create backup interval
 	interval := createTestInterval()
 
 	backupConfig := &backups_config.BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
-		StorageID:        &storage.ID,
-		BackupIntervalID: interval.ID,
-		BackupInterval:   interval,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
 	}
 	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
 	assert.NoError(t, err)
 
-	// Create backups with different ages
 	now := time.Now().UTC()
 	oldBackup1 := &backups_core.Backup{
 		ID:           uuid.New(),
@@ -63,7 +62,7 @@ func Test_CleanOldBackups_DeletesBackupsOlderThanStorePeriod(t *testing.T) {
 		StorageID:    storage.ID,
 		Status:       backups_core.BackupStatusCompleted,
 		BackupSizeMb: 10,
-		CreatedAt:    now.Add(-10 * 24 * time.Hour), // 10 days old
+		CreatedAt:    now.Add(-10 * 24 * time.Hour),
 	}
 	oldBackup2 := &backups_core.Backup{
 		ID:           uuid.New(),
@@ -71,7 +70,7 @@ func Test_CleanOldBackups_DeletesBackupsOlderThanStorePeriod(t *testing.T) {
 		StorageID:    storage.ID,
 		Status:       backups_core.BackupStatusCompleted,
 		BackupSizeMb: 10,
-		CreatedAt:    now.Add(-8 * 24 * time.Hour), // 8 days old
+		CreatedAt:    now.Add(-8 * 24 * time.Hour),
 	}
 	recentBackup := &backups_core.Backup{
 		ID:           uuid.New(),
@@ -79,7 +78,7 @@ func Test_CleanOldBackups_DeletesBackupsOlderThanStorePeriod(t *testing.T) {
 		StorageID:    storage.ID,
 		Status:       backups_core.BackupStatusCompleted,
 		BackupSizeMb: 10,
-		CreatedAt:    now.Add(-3 * 24 * time.Hour), // 3 days old
+		CreatedAt:    now.Add(-3 * 24 * time.Hour),
 	}
 
 	err = backupRepository.Save(oldBackup1)
@@ -89,19 +88,17 @@ func Test_CleanOldBackups_DeletesBackupsOlderThanStorePeriod(t *testing.T) {
 	err = backupRepository.Save(recentBackup)
 	assert.NoError(t, err)
 
-	// Run cleanup
 	cleaner := GetBackupCleaner()
-	err = cleaner.cleanOldBackups()
+	err = cleaner.cleanByRetentionPolicy()
 	assert.NoError(t, err)
 
-	// Verify old backups deleted, recent backup remains
 	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
 	assert.NoError(t, err)
 	assert.Equal(t, 1, len(remainingBackups))
 	assert.Equal(t, recentBackup.ID, remainingBackups[0].ID)
 }
 
-func Test_CleanOldBackups_SkipsDatabaseWithForeverStorePeriod(t *testing.T) {
+func Test_CleanOldBackups_SkipsDatabaseWithForeverRetentionPeriod(t *testing.T) {
 	router := CreateTestRouter()
 	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
 	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
@@ -122,38 +119,35 @@ func Test_CleanOldBackups_SkipsDatabaseWithForeverStorePeriod(t *testing.T) {
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create backup interval
 	interval := createTestInterval()
 
 	backupConfig := &backups_config.BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodForever,
-		StorageID:        &storage.ID,
-		BackupIntervalID: interval.ID,
-		BackupInterval:   interval,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodForever,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
 	}
 	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
 	assert.NoError(t, err)
 
-	// Create very old backup
 	oldBackup := &backups_core.Backup{
 		ID:           uuid.New(),
 		DatabaseID:   database.ID,
 		StorageID:    storage.ID,
 		Status:       backups_core.BackupStatusCompleted,
 		BackupSizeMb: 10,
-		CreatedAt:    time.Now().UTC().Add(-365 * 24 * time.Hour), // 1 year old
+		CreatedAt:    time.Now().UTC().Add(-365 * 24 * time.Hour),
 	}
 	err = backupRepository.Save(oldBackup)
 	assert.NoError(t, err)
 
-	// Run cleanup
 	cleaner := GetBackupCleaner()
-	err = cleaner.cleanOldBackups()
+	err = cleaner.cleanByRetentionPolicy()
 	assert.NoError(t, err)
 
-	// Verify backup still exists
 	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
 	assert.NoError(t, err)
 	assert.Equal(t, 1, len(remainingBackups))
@@ -181,22 +175,21 @@ func Test_CleanExceededBackups_WhenUnderLimit_NoBackupsDeleted(t *testing.T) {
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create backup interval
 	interval := createTestInterval()
 
 	backupConfig := &backups_config.BackupConfig{
 		DatabaseID:            database.ID,
 		IsBackupsEnabled:      true,
-		StorePeriod:           period.PeriodForever,
+		RetentionPolicyType:   backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   period.PeriodForever,
 		StorageID:             &storage.ID,
-		MaxBackupsTotalSizeMB: 100, // 100 MB limit
+		MaxBackupsTotalSizeMB: 100,
 		BackupIntervalID:      interval.ID,
 		BackupInterval:        interval,
 	}
 	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
 	assert.NoError(t, err)
 
-	// Create 3 backups totaling 50MB (under limit)
 	for i := 0; i < 3; i++ {
 		backup := &backups_core.Backup{
 			ID:           uuid.New(),
@@ -210,12 +203,10 @@ func Test_CleanExceededBackups_WhenUnderLimit_NoBackupsDeleted(t *testing.T) {
 		assert.NoError(t, err)
 	}
 
-	// Run cleanup
 	cleaner := GetBackupCleaner()
 	err = cleaner.cleanExceededBackups()
 	assert.NoError(t, err)
 
-	// Verify all backups remain
 	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
 	assert.NoError(t, err)
 	assert.Equal(t, 3, len(remainingBackups))
@@ -242,22 +233,21 @@ func Test_CleanExceededBackups_WhenOverLimit_DeletesOldestBackups(t *testing.T)
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create backup interval
 	interval := createTestInterval()
 
 	backupConfig := &backups_config.BackupConfig{
 		DatabaseID:            database.ID,
 		IsBackupsEnabled:      true,
-		StorePeriod:           period.PeriodForever,
+		RetentionPolicyType:   backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   period.PeriodForever,
 		StorageID:             &storage.ID,
-		MaxBackupsTotalSizeMB: 30, // 30 MB limit
+		MaxBackupsTotalSizeMB: 30,
 		BackupIntervalID:      interval.ID,
 		BackupInterval:        interval,
 	}
 	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
 	assert.NoError(t, err)
 
-	// Create 5 backups of 10MB each (total 50MB, over 30MB limit)
 	now := time.Now().UTC()
 	var backupIDs []uuid.UUID
 	for i := 0; i < 5; i++ {
@@ -267,33 +257,30 @@ func Test_CleanExceededBackups_WhenOverLimit_DeletesOldestBackups(t *testing.T)
 			StorageID:    storage.ID,
 			Status:       backups_core.BackupStatusCompleted,
 			BackupSizeMb: 10,
-			CreatedAt:    now.Add(-time.Duration(4-i) * time.Hour), // Oldest first
+			CreatedAt:    now.Add(-time.Duration(4-i) * time.Hour),
 		}
 		err = backupRepository.Save(backup)
 		assert.NoError(t, err)
 		backupIDs = append(backupIDs, backup.ID)
 	}
 
-	// Run cleanup
 	cleaner := GetBackupCleaner()
 	err = cleaner.cleanExceededBackups()
 	assert.NoError(t, err)
 
-	// Verify 2 oldest backups deleted, 3 newest remain
 	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
 	assert.NoError(t, err)
 	assert.Equal(t, 3, len(remainingBackups))
 
-	// Check that the newest 3 backups remain
 	remainingIDs := make(map[uuid.UUID]bool)
 	for _, backup := range remainingBackups {
 		remainingIDs[backup.ID] = true
 	}
-	assert.False(t, remainingIDs[backupIDs[0]]) // Oldest deleted
-	assert.False(t, remainingIDs[backupIDs[1]]) // 2nd oldest deleted
-	assert.True(t, remainingIDs[backupIDs[2]])  // 3rd remains
-	assert.True(t, remainingIDs[backupIDs[3]])  // 4th remains
-	assert.True(t, remainingIDs[backupIDs[4]])  // Newest remains
+	assert.False(t, remainingIDs[backupIDs[0]])
+	assert.False(t, remainingIDs[backupIDs[1]])
+	assert.True(t, remainingIDs[backupIDs[2]])
+	assert.True(t, remainingIDs[backupIDs[3]])
+	assert.True(t, remainingIDs[backupIDs[4]])
 }
 
 func Test_CleanExceededBackups_SkipsInProgressBackups(t *testing.T) {
@@ -317,15 +304,15 @@ func Test_CleanExceededBackups_SkipsInProgressBackups(t *testing.T) {
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create backup interval
 	interval := createTestInterval()
 
 	backupConfig := &backups_config.BackupConfig{
 		DatabaseID:            database.ID,
 		IsBackupsEnabled:      true,
-		StorePeriod:           period.PeriodForever,
+		RetentionPolicyType:   backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   period.PeriodForever,
 		StorageID:             &storage.ID,
-		MaxBackupsTotalSizeMB: 50, // 50 MB limit
+		MaxBackupsTotalSizeMB: 50,
 		BackupIntervalID:      interval.ID,
 		BackupInterval:        interval,
 	}
@@ -334,7 +321,6 @@ func Test_CleanExceededBackups_SkipsInProgressBackups(t *testing.T) {
 
 	now := time.Now().UTC()
 
-	// Create 3 completed backups of 30MB each
 	completedBackups := make([]*backups_core.Backup, 3)
 	for i := 0; i < 3; i++ {
 		backup := &backups_core.Backup{
@@ -350,7 +336,6 @@ func Test_CleanExceededBackups_SkipsInProgressBackups(t *testing.T) {
 		completedBackups[i] = backup
 	}
 
-	// Create 1 in-progress backup (should be excluded from size calculation and deletion)
 	inProgressBackup := &backups_core.Backup{
 		ID:           uuid.New(),
 		DatabaseID:   database.ID,
@@ -362,19 +347,14 @@ func Test_CleanExceededBackups_SkipsInProgressBackups(t *testing.T) {
 	err = backupRepository.Save(inProgressBackup)
 	assert.NoError(t, err)
 
-	// Run cleanup
 	cleaner := GetBackupCleaner()
 	err = cleaner.cleanExceededBackups()
 	assert.NoError(t, err)
 
-	// Verify: only completed backups deleted, in-progress remains
 	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
 	assert.NoError(t, err)
-
-	// Should have in-progress + 1 completed (total 40MB completed + 10MB in-progress)
 	assert.GreaterOrEqual(t, len(remainingBackups), 2)
 
-	// Verify in-progress backup still exists
 	var inProgressFound bool
 	for _, backup := range remainingBackups {
 		if backup.ID == inProgressBackup.ID {
@@ -406,22 +386,21 @@ func Test_CleanExceededBackups_WithZeroLimit_SkipsDatabase(t *testing.T) {
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create backup interval
 	interval := createTestInterval()
 
 	backupConfig := &backups_config.BackupConfig{
 		DatabaseID:            database.ID,
 		IsBackupsEnabled:      true,
-		StorePeriod:           period.PeriodForever,
+		RetentionPolicyType:   backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   period.PeriodForever,
 		StorageID:             &storage.ID,
-		MaxBackupsTotalSizeMB: 0, // No size limit
+		MaxBackupsTotalSizeMB: 0,
 		BackupIntervalID:      interval.ID,
 		BackupInterval:        interval,
 	}
 	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
 	assert.NoError(t, err)
 
-	// Create large backups
 	for i := 0; i < 10; i++ {
 		backup := &backups_core.Backup{
 			ID:           uuid.New(),
@@ -435,12 +414,10 @@ func Test_CleanExceededBackups_WithZeroLimit_SkipsDatabase(t *testing.T) {
 		assert.NoError(t, err)
 	}
 
-	// Run cleanup
 	cleaner := GetBackupCleaner()
 	err = cleaner.cleanExceededBackups()
 	assert.NoError(t, err)
 
-	// Verify all backups remain
 	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
 	assert.NoError(t, err)
 	assert.Equal(t, 10, len(remainingBackups))
@@ -467,7 +444,6 @@ func Test_GetTotalSizeByDatabase_CalculatesCorrectly(t *testing.T) {
 		workspaces_testing.RemoveTestWorkspace(workspace, router)
 	}()
 
-	// Create completed backups
 	completedBackup1 := &backups_core.Backup{
 		ID:           uuid.New(),
 		DatabaseID:   database.ID,
@@ -484,7 +460,6 @@ func Test_GetTotalSizeByDatabase_CalculatesCorrectly(t *testing.T) {
 		BackupSizeMb: 20.3,
 		CreatedAt:    time.Now().UTC(),
 	}
-	// Create failed backup (should be included)
 	failedBackup := &backups_core.Backup{
 		ID:           uuid.New(),
 		DatabaseID:   database.ID,
@@ -493,7 +468,6 @@ func Test_GetTotalSizeByDatabase_CalculatesCorrectly(t *testing.T) {
 		BackupSizeMb: 5.2,
 		CreatedAt:    time.Now().UTC(),
 	}
-	// Create in-progress backup (should be excluded)
 	inProgressBackup := &backups_core.Backup{
 		ID:           uuid.New(),
 		DatabaseID:   database.ID,
@@ -512,25 +486,215 @@ func Test_GetTotalSizeByDatabase_CalculatesCorrectly(t *testing.T) {
 	err = backupRepository.Save(inProgressBackup)
 	assert.NoError(t, err)
 
-	// Calculate total size
 	totalSize, err := backupRepository.GetTotalSizeByDatabase(database.ID)
 	assert.NoError(t, err)
-
-	// Should be 10.5 + 20.3 + 5.2 = 36.0 (excluding in-progress 100)
 	assert.InDelta(t, 36.0, totalSize, 0.1)
 }
 
-// Mock listener for testing
-type mockBackupRemoveListener struct {
-	onBeforeBackupRemove func(*backups_core.Backup) error
-}
+func Test_CleanByCount_KeepsNewestNBackups_DeletesOlder(t *testing.T) {
+	router := CreateTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	storage := storages.CreateTestStorage(workspace.ID)
+	notifier := notifiers.CreateTestNotifier(workspace.ID)
+	database := databases.CreateTestDatabase(workspace.ID, storage, notifier)
 
-func (m *mockBackupRemoveListener) OnBeforeBackupRemove(backup *backups_core.Backup) error {
-	if m.onBeforeBackupRemove != nil {
-		return m.onBeforeBackupRemove(backup)
+	defer func() {
+		backups, _ := backupRepository.FindByDatabaseID(database.ID)
+		for _, backup := range backups {
+			backupRepository.DeleteByID(backup.ID)
+		}
+
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		notifiers.RemoveTestNotifier(notifier)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	interval := createTestInterval()
+
+	backupConfig := &backups_config.BackupConfig{
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeCount,
+		RetentionCount:      3,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
+	}
+	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	now := time.Now().UTC()
+	var backupIDs []uuid.UUID
+	for i := 0; i < 5; i++ {
+		backup := &backups_core.Backup{
+			ID:           uuid.New(),
+			DatabaseID:   database.ID,
+			StorageID:    storage.ID,
+			Status:       backups_core.BackupStatusCompleted,
+			BackupSizeMb: 10,
+			CreatedAt: now.Add(
+				-time.Duration(4-i) * time.Hour,
+			), // oldest first in loop, newest = i=4
+		}
+		err = backupRepository.Save(backup)
+		assert.NoError(t, err)
+		backupIDs = append(backupIDs, backup.ID)
 	}
 
-	return nil
+	cleaner := GetBackupCleaner()
+	err = cleaner.cleanByRetentionPolicy()
+	assert.NoError(t, err)
+
+	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+	assert.Equal(t, 3, len(remainingBackups))
+
+	remainingIDs := make(map[uuid.UUID]bool)
+	for _, backup := range remainingBackups {
+		remainingIDs[backup.ID] = true
+	}
+	assert.False(t, remainingIDs[backupIDs[0]], "Oldest backup should be deleted")
+	assert.False(t, remainingIDs[backupIDs[1]], "2nd oldest backup should be deleted")
+	assert.True(t, remainingIDs[backupIDs[2]], "3rd backup should remain")
+	assert.True(t, remainingIDs[backupIDs[3]], "4th backup should remain")
+	assert.True(t, remainingIDs[backupIDs[4]], "Newest backup should remain")
+}
+
+func Test_CleanByCount_WhenUnderLimit_NoBackupsDeleted(t *testing.T) {
+	router := CreateTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	storage := storages.CreateTestStorage(workspace.ID)
+	notifier := notifiers.CreateTestNotifier(workspace.ID)
+	database := databases.CreateTestDatabase(workspace.ID, storage, notifier)
+
+	defer func() {
+		backups, _ := backupRepository.FindByDatabaseID(database.ID)
+		for _, backup := range backups {
+			backupRepository.DeleteByID(backup.ID)
+		}
+
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		notifiers.RemoveTestNotifier(notifier)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	interval := createTestInterval()
+
+	backupConfig := &backups_config.BackupConfig{
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeCount,
+		RetentionCount:      10,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
+	}
+	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	for i := 0; i < 5; i++ {
+		backup := &backups_core.Backup{
+			ID:           uuid.New(),
+			DatabaseID:   database.ID,
+			StorageID:    storage.ID,
+			Status:       backups_core.BackupStatusCompleted,
+			BackupSizeMb: 10,
+			CreatedAt:    time.Now().UTC().Add(-time.Duration(i) * time.Hour),
+		}
+		err = backupRepository.Save(backup)
+		assert.NoError(t, err)
+	}
+
+	cleaner := GetBackupCleaner()
+	err = cleaner.cleanByRetentionPolicy()
+	assert.NoError(t, err)
+
+	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+	assert.Equal(t, 5, len(remainingBackups))
+}
+
+func Test_CleanByCount_DoesNotDeleteInProgressBackups(t *testing.T) {
+	router := CreateTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	storage := storages.CreateTestStorage(workspace.ID)
+	notifier := notifiers.CreateTestNotifier(workspace.ID)
+	database := databases.CreateTestDatabase(workspace.ID, storage, notifier)
+
+	defer func() {
+		backups, _ := backupRepository.FindByDatabaseID(database.ID)
+		for _, backup := range backups {
+			backupRepository.DeleteByID(backup.ID)
+		}
+
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		notifiers.RemoveTestNotifier(notifier)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	interval := createTestInterval()
+
+	backupConfig := &backups_config.BackupConfig{
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeCount,
+		RetentionCount:      2,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
+	}
+	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	now := time.Now().UTC()
+
+	for i := 0; i < 3; i++ {
+		backup := &backups_core.Backup{
+			ID:           uuid.New(),
+			DatabaseID:   database.ID,
+			StorageID:    storage.ID,
+			Status:       backups_core.BackupStatusCompleted,
+			BackupSizeMb: 10,
+			CreatedAt:    now.Add(-time.Duration(3-i) * time.Hour),
+		}
+		err = backupRepository.Save(backup)
+		assert.NoError(t, err)
+	}
+
+	inProgressBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusInProgress,
+		BackupSizeMb: 5,
+		CreatedAt:    now,
+	}
+	err = backupRepository.Save(inProgressBackup)
+	assert.NoError(t, err)
+
+	cleaner := GetBackupCleaner()
+	err = cleaner.cleanByRetentionPolicy()
+	assert.NoError(t, err)
+
+	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+
+	var inProgressFound bool
+	for _, backup := range remainingBackups {
+		if backup.ID == inProgressBackup.ID {
+			inProgressFound = true
+		}
+	}
+	assert.True(t, inProgressFound, "In-progress backup should not be deleted by count policy")
 }
 
 // Test_DeleteBackup_WhenStorageDeleteFails_BackupStillRemovedFromDatabase verifies resilience
@@ -579,6 +743,267 @@ func Test_DeleteBackup_WhenStorageDeleteFails_BackupStillRemovedFromDatabase(t *
 	assert.Nil(t, deletedBackup)
 }
 
+func Test_CleanByTimePeriod_SkipsRecentBackup_EvenIfOlderThanRetention(t *testing.T) {
+	router := CreateTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	storage := storages.CreateTestStorage(workspace.ID)
+	notifier := notifiers.CreateTestNotifier(workspace.ID)
+	database := databases.CreateTestDatabase(workspace.ID, storage, notifier)
+
+	defer func() {
+		backups, _ := backupRepository.FindByDatabaseID(database.ID)
+		for _, backup := range backups {
+			backupRepository.DeleteByID(backup.ID)
+		}
+
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		notifiers.RemoveTestNotifier(notifier)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	interval := createTestInterval()
+
+	// Retention period is 1 day — any backup older than 1 day should be deleted.
+	// But the recent backup was created only 30 minutes ago and must be preserved.
+	backupConfig := &backups_config.BackupConfig{
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodDay,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
+	}
+	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	now := time.Now().UTC()
+
+	oldBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 10,
+		CreatedAt:    now.Add(-2 * 24 * time.Hour),
+	}
+	recentBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 10,
+		CreatedAt:    now.Add(-30 * time.Minute),
+	}
+
+	err = backupRepository.Save(oldBackup)
+	assert.NoError(t, err)
+	err = backupRepository.Save(recentBackup)
+	assert.NoError(t, err)
+
+	cleaner := GetBackupCleaner()
+	err = cleaner.cleanByRetentionPolicy()
+	assert.NoError(t, err)
+
+	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+	assert.Equal(t, 1, len(remainingBackups))
+	assert.Equal(t, recentBackup.ID, remainingBackups[0].ID)
+}
+
+func Test_CleanByCount_SkipsRecentBackup_EvenIfOverLimit(t *testing.T) {
+	router := CreateTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	storage := storages.CreateTestStorage(workspace.ID)
+	notifier := notifiers.CreateTestNotifier(workspace.ID)
+	database := databases.CreateTestDatabase(workspace.ID, storage, notifier)
+
+	defer func() {
+		backups, _ := backupRepository.FindByDatabaseID(database.ID)
+		for _, backup := range backups {
+			backupRepository.DeleteByID(backup.ID)
+		}
+
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		notifiers.RemoveTestNotifier(notifier)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	interval := createTestInterval()
+
+	// Retention count is 2 — 4 backups exist so 2 should be deleted.
+	// The oldest backup in the "excess" tail was made 30 min ago — it must be preserved.
+	backupConfig := &backups_config.BackupConfig{
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: backups_config.RetentionPolicyTypeCount,
+		RetentionCount:      2,
+		StorageID:           &storage.ID,
+		BackupIntervalID:    interval.ID,
+		BackupInterval:      interval,
+	}
+	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	now := time.Now().UTC()
+
+	oldBackup1 := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 10,
+		CreatedAt:    now.Add(-5 * time.Hour),
+	}
+	oldBackup2 := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 10,
+		CreatedAt:    now.Add(-3 * time.Hour),
+	}
+	// This backup is 3rd newest and would normally be deleted — but it is recent.
+	recentExcessBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 10,
+		CreatedAt:    now.Add(-30 * time.Minute),
+	}
+	newestBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 10,
+		CreatedAt:    now.Add(-10 * time.Minute),
+	}
+
+	for _, b := range []*backups_core.Backup{oldBackup1, oldBackup2, recentExcessBackup, newestBackup} {
+		err = backupRepository.Save(b)
+		assert.NoError(t, err)
+	}
+
+	cleaner := GetBackupCleaner()
+	err = cleaner.cleanByRetentionPolicy()
+	assert.NoError(t, err)
+
+	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+
+	remainingIDs := make(map[uuid.UUID]bool)
+	for _, backup := range remainingBackups {
+		remainingIDs[backup.ID] = true
+	}
+
+	assert.False(t, remainingIDs[oldBackup1.ID], "Oldest non-recent backup should be deleted")
+	assert.False(t, remainingIDs[oldBackup2.ID], "2nd oldest non-recent backup should be deleted")
+	assert.True(
+		t,
+		remainingIDs[recentExcessBackup.ID],
+		"Recent backup must be preserved despite being over limit",
+	)
+	assert.True(t, remainingIDs[newestBackup.ID], "Newest backup should be preserved")
+}
+
+func Test_CleanExceededBackups_SkipsRecentBackup_WhenOverTotalSizeLimit(t *testing.T) {
+	router := CreateTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	storage := storages.CreateTestStorage(workspace.ID)
+	notifier := notifiers.CreateTestNotifier(workspace.ID)
+	database := databases.CreateTestDatabase(workspace.ID, storage, notifier)
+
+	defer func() {
+		backups, _ := backupRepository.FindByDatabaseID(database.ID)
+		for _, backup := range backups {
+			backupRepository.DeleteByID(backup.ID)
+		}
+
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		notifiers.RemoveTestNotifier(notifier)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	interval := createTestInterval()
+
+	// Total size limit is 10 MB. We have two backups of 8 MB each (16 MB total).
+	// The oldest backup was created 30 minutes ago — within the grace period.
+	// The cleaner must stop and leave both backups intact.
+	backupConfig := &backups_config.BackupConfig{
+		DatabaseID:            database.ID,
+		IsBackupsEnabled:      true,
+		RetentionPolicyType:   backups_config.RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   period.PeriodForever,
+		StorageID:             &storage.ID,
+		MaxBackupsTotalSizeMB: 10,
+		BackupIntervalID:      interval.ID,
+		BackupInterval:        interval,
+	}
+	_, err := backups_config.GetBackupConfigService().SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	now := time.Now().UTC()
+
+	olderRecentBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 8,
+		CreatedAt:    now.Add(-30 * time.Minute),
+	}
+	newerRecentBackup := &backups_core.Backup{
+		ID:           uuid.New(),
+		DatabaseID:   database.ID,
+		StorageID:    storage.ID,
+		Status:       backups_core.BackupStatusCompleted,
+		BackupSizeMb: 8,
+		CreatedAt:    now.Add(-10 * time.Minute),
+	}
+
+	err = backupRepository.Save(olderRecentBackup)
+	assert.NoError(t, err)
+	err = backupRepository.Save(newerRecentBackup)
+	assert.NoError(t, err)
+
+	cleaner := GetBackupCleaner()
+	err = cleaner.cleanExceededBackups()
+	assert.NoError(t, err)
+
+	remainingBackups, err := backupRepository.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+	assert.Equal(
+		t,
+		2,
+		len(remainingBackups),
+		"Both recent backups must be preserved even though total size exceeds limit",
+	)
+}
+
+// Mock listener for testing
+type mockBackupRemoveListener struct {
+	onBeforeBackupRemove func(*backups_core.Backup) error
+}
+
+func (m *mockBackupRemoveListener) OnBeforeBackupRemove(backup *backups_core.Backup) error {
+	if m.onBeforeBackupRemove != nil {
+		return m.onBeforeBackupRemove(backup)
+	}
+
+	return nil
+}
+
 func createTestInterval() *intervals.Interval {
 	timeOfDay := "04:00"
 	interval := &intervals.Interval{

backend/internal/features/backups/backups/backuping/di.go

@@ -25,24 +25,24 @@ var backupRepository = &backups_core.BackupRepository{}
 var taskCancelManager = tasks_cancellation.GetTaskCancelManager()
 
 var backupCleaner = &BackupCleaner{
-	backupRepository:      backupRepository,
-	storageService:        storages.GetStorageService(),
-	backupConfigService:   backups_config.GetBackupConfigService(),
-	fieldEncryptor:        encryption.GetFieldEncryptor(),
-	logger:                logger.GetLogger(),
-	backupRemoveListeners: []backups_core.BackupRemoveListener{},
-	runOnce:               sync.Once{},
-	hasRun:                atomic.Bool{},
+	backupRepository,
+	storages.GetStorageService(),
+	backups_config.GetBackupConfigService(),
+	encryption.GetFieldEncryptor(),
+	logger.GetLogger(),
+	[]backups_core.BackupRemoveListener{},
+	sync.Once{},
+	atomic.Bool{},
 }
 
 var backupNodesRegistry = &BackupNodesRegistry{
-	client:            cache_utils.GetValkeyClient(),
-	logger:            logger.GetLogger(),
-	timeout:           cache_utils.DefaultCacheTimeout,
-	pubsubBackups:     cache_utils.NewPubSubManager(),
-	pubsubCompletions: cache_utils.NewPubSubManager(),
-	runOnce:           sync.Once{},
-	hasRun:            atomic.Bool{},
+	cache_utils.GetValkeyClient(),
+	logger.GetLogger(),
+	cache_utils.DefaultCacheTimeout,
+	cache_utils.NewPubSubManager(),
+	cache_utils.NewPubSubManager(),
+	sync.Once{},
+	atomic.Bool{},
 }
 
 func getNodeID() uuid.UUID {
@@ -50,34 +50,35 @@ func getNodeID() uuid.UUID {
 }
 
 var backuperNode = &BackuperNode{
-	databaseService:     databases.GetDatabaseService(),
-	fieldEncryptor:      encryption.GetFieldEncryptor(),
-	workspaceService:    workspaces_services.GetWorkspaceService(),
-	backupRepository:    backupRepository,
-	backupConfigService: backups_config.GetBackupConfigService(),
-	storageService:      storages.GetStorageService(),
-	notificationSender:  notifiers.GetNotifierService(),
-	backupCancelManager: taskCancelManager,
-	backupNodesRegistry: backupNodesRegistry,
-	logger:              logger.GetLogger(),
-	createBackupUseCase: usecases.GetCreateBackupUsecase(),
-	nodeID:              getNodeID(),
-	lastHeartbeat:       time.Time{},
-	runOnce:             sync.Once{},
-	hasRun:              atomic.Bool{},
+	databases.GetDatabaseService(),
+	encryption.GetFieldEncryptor(),
+	workspaces_services.GetWorkspaceService(),
+	backupRepository,
+	backups_config.GetBackupConfigService(),
+	storages.GetStorageService(),
+	notifiers.GetNotifierService(),
+	taskCancelManager,
+	backupNodesRegistry,
+	logger.GetLogger(),
+	usecases.GetCreateBackupUsecase(),
+	getNodeID(),
+	time.Time{},
+	sync.Once{},
+	atomic.Bool{},
 }
 
 var backupsScheduler = &BackupsScheduler{
-	backupRepository:      backupRepository,
-	backupConfigService:   backups_config.GetBackupConfigService(),
-	taskCancelManager:     taskCancelManager,
-	backupNodesRegistry:   backupNodesRegistry,
-	lastBackupTime:        time.Now().UTC(),
-	logger:                logger.GetLogger(),
-	backupToNodeRelations: make(map[uuid.UUID]BackupToNodeRelation),
-	backuperNode:          backuperNode,
-	runOnce:               sync.Once{},
-	hasRun:                atomic.Bool{},
+	backupRepository,
+	backups_config.GetBackupConfigService(),
+	taskCancelManager,
+	backupNodesRegistry,
+	databases.GetDatabaseService(),
+	time.Now().UTC(),
+	logger.GetLogger(),
+	make(map[uuid.UUID]BackupToNodeRelation),
+	backuperNode,
+	sync.Once{},
+	atomic.Bool{},
 }
 
 func GetBackupsScheduler() *BackupsScheduler {

backend/internal/features/backups/backups/backuping/mocks.go

@@ -6,14 +6,15 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/mock"
+
 	common "databasus-backend/internal/features/backups/backups/common"
+	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
 	"databasus-backend/internal/features/notifiers"
 	"databasus-backend/internal/features/storages"
-
-	"github.com/google/uuid"
-	"github.com/stretchr/testify/mock"
 )
 
 type MockNotificationSender struct {
@@ -32,7 +33,7 @@ type CreateFailedBackupUsecase struct{}
 
 func (uc *CreateFailedBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -46,7 +47,7 @@ type CreateSuccessBackupUsecase struct{}
 
 func (uc *CreateSuccessBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -65,7 +66,7 @@ type CreateLargeBackupUsecase struct{}
 
 func (uc *CreateLargeBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -84,7 +85,7 @@ type CreateProgressiveBackupUsecase struct{}
 
 func (uc *CreateProgressiveBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -124,7 +125,7 @@ type CreateMediumBackupUsecase struct{}
 
 func (uc *CreateMediumBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -152,7 +153,7 @@ func NewMockTrackingBackupUsecase() *MockTrackingBackupUsecase {
 
 func (m *MockTrackingBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -162,7 +163,7 @@ func (m *MockTrackingBackupUsecase) Execute(
 
 	// Send backup ID to channel (non-blocking)
 	select {
-	case m.calledBackupIDs <- backupID:
+	case m.calledBackupIDs <- backup.ID:
 	default:
 	}
 

backend/internal/features/backups/backups/backuping/registry.go

@@ -10,10 +10,10 @@ import (
 	"sync/atomic"
 	"time"
 
-	cache_utils "databasus-backend/internal/util/cache"
-
 	"github.com/google/uuid"
 	"github.com/valkey-io/valkey-go"
+
+	cache_utils "databasus-backend/internal/util/cache"
 )
 
 const (
@@ -415,7 +415,7 @@ func (r *BackupNodesRegistry) UnsubscribeNodeForBackupsAssignments() error {
 	return nil
 }
 
-func (r *BackupNodesRegistry) PublishBackupCompletion(nodeID uuid.UUID, backupID uuid.UUID) error {
+func (r *BackupNodesRegistry) PublishBackupCompletion(nodeID, backupID uuid.UUID) error {
 	ctx := context.Background()
 
 	message := BackupCompletionMessage{
@@ -437,7 +437,7 @@ func (r *BackupNodesRegistry) PublishBackupCompletion(nodeID uuid.UUID, backupID
 }
 
 func (r *BackupNodesRegistry) SubscribeForBackupsCompletions(
-	handler func(nodeID uuid.UUID, backupID uuid.UUID),
+	handler func(nodeID, backupID uuid.UUID),
 ) error {
 	ctx := context.Background()
 

backend/internal/features/backups/backups/backuping/registry_test.go

@@ -9,11 +9,11 @@ import (
 	"testing"
 	"time"
 
-	cache_utils "databasus-backend/internal/util/cache"
-	"databasus-backend/internal/util/logger"
-
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
+
+	cache_utils "databasus-backend/internal/util/cache"
+	"databasus-backend/internal/util/logger"
 )
 
 func Test_HearthbeatNodeInRegistry_RegistersNodeWithTTL(t *testing.T) {
@@ -903,7 +903,7 @@ func Test_SubscribeForBackupsCompletions_ReceivesCompletedBackups(t *testing.T)
 
 	receivedBackupID := make(chan uuid.UUID, 1)
 	receivedNodeID := make(chan uuid.UUID, 1)
-	handler := func(nodeID uuid.UUID, backupID uuid.UUID) {
+	handler := func(nodeID, backupID uuid.UUID) {
 		receivedNodeID <- nodeID
 		receivedBackupID <- backupID
 	}
@@ -940,7 +940,7 @@ func Test_SubscribeForBackupsCompletions_ParsesJsonCorrectly(t *testing.T) {
 	defer registry.UnsubscribeForBackupsCompletions()
 
 	receivedBackups := make(chan uuid.UUID, 2)
-	handler := func(nodeID uuid.UUID, backupID uuid.UUID) {
+	handler := func(nodeID, backupID uuid.UUID) {
 		receivedBackups <- backupID
 	}
 
@@ -969,7 +969,7 @@ func Test_SubscribeForBackupsCompletions_HandlesInvalidJson(t *testing.T) {
 	defer registry.UnsubscribeForBackupsCompletions()
 
 	receivedBackupID := make(chan uuid.UUID, 1)
-	handler := func(nodeID uuid.UUID, backupID uuid.UUID) {
+	handler := func(nodeID, backupID uuid.UUID) {
 		receivedBackupID <- backupID
 	}
 
@@ -997,7 +997,7 @@ func Test_UnsubscribeForBackupsCompletions_StopsReceivingMessages(t *testing.T)
 	backupID2 := uuid.New()
 
 	receivedBackupID := make(chan uuid.UUID, 2)
-	handler := func(nodeID uuid.UUID, backupID uuid.UUID) {
+	handler := func(nodeID, backupID uuid.UUID) {
 		receivedBackupID <- backupID
 	}
 
@@ -1032,7 +1032,7 @@ func Test_SubscribeForBackupsCompletions_WhenAlreadySubscribed_ReturnsError(t *t
 	registry := createTestRegistry()
 	defer registry.UnsubscribeForBackupsCompletions()
 
-	handler := func(nodeID uuid.UUID, backupID uuid.UUID) {}
+	handler := func(nodeID, backupID uuid.UUID) {}
 
 	err := registry.SubscribeForBackupsCompletions(handler)
 	assert.NoError(t, err)
@@ -1064,9 +1064,9 @@ func Test_MultipleSubscribers_EachReceivesCompletionMessages(t *testing.T) {
 	receivedBackups2 := make(chan uuid.UUID, 3)
 	receivedBackups3 := make(chan uuid.UUID, 3)
 
-	handler1 := func(nodeID uuid.UUID, backupID uuid.UUID) { receivedBackups1 <- backupID }
-	handler2 := func(nodeID uuid.UUID, backupID uuid.UUID) { receivedBackups2 <- backupID }
-	handler3 := func(nodeID uuid.UUID, backupID uuid.UUID) { receivedBackups3 <- backupID }
+	handler1 := func(nodeID, backupID uuid.UUID) { receivedBackups1 <- backupID }
+	handler2 := func(nodeID, backupID uuid.UUID) { receivedBackups2 <- backupID }
+	handler3 := func(nodeID, backupID uuid.UUID) { receivedBackups3 <- backupID }
 
 	err := registry1.SubscribeForBackupsCompletions(handler1)
 	assert.NoError(t, err)

backend/internal/features/backups/backups/backuping/scheduler.go

@@ -13,6 +13,7 @@ import (
 	"databasus-backend/internal/config"
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_config "databasus-backend/internal/features/backups/config"
+	"databasus-backend/internal/features/databases"
 	task_cancellation "databasus-backend/internal/features/tasks/cancellation"
 )
 
@@ -27,6 +28,7 @@ type BackupsScheduler struct {
 	backupConfigService *backups_config.BackupConfigService
 	taskCancelManager   *task_cancellation.TaskCancelManager
 	backupNodesRegistry *BackupNodesRegistry
+	databaseService     *databases.DatabaseService
 
 	lastBackupTime time.Time
 	logger         *slog.Logger
@@ -103,28 +105,38 @@ func (s *BackupsScheduler) IsSchedulerRunning() bool {
 	return s.lastBackupTime.After(time.Now().UTC().Add(-schedulerHealthcheckThreshold))
 }
 
-func (s *BackupsScheduler) StartBackup(databaseID uuid.UUID, isCallNotifier bool) {
-	backupConfig, err := s.backupConfigService.GetBackupConfigByDbId(databaseID)
+func (s *BackupsScheduler) IsBackupNodesAvailable() bool {
+	nodes, err := s.backupNodesRegistry.GetAvailableNodes()
+	if err != nil {
+		s.logger.Error("Failed to get available nodes for health check", "error", err)
+		return false
+	}
+
+	return len(nodes) > 0
+}
+
+func (s *BackupsScheduler) StartBackup(database *databases.Database, isCallNotifier bool) {
+	backupConfig, err := s.backupConfigService.GetBackupConfigByDbId(database.ID)
 	if err != nil {
 		s.logger.Error("Failed to get backup config by database ID", "error", err)
 		return
 	}
 
 	if backupConfig.StorageID == nil {
-		s.logger.Error("Backup config storage ID is nil", "databaseId", databaseID)
+		s.logger.Error("Backup config storage ID is nil", "databaseId", database.ID)
 		return
 	}
 
 	// Check for existing in-progress backups
 	inProgressBackups, err := s.backupRepository.FindByDatabaseIdAndStatus(
-		databaseID,
+		database.ID,
 		backups_core.BackupStatusInProgress,
 	)
 	if err != nil {
 		s.logger.Error(
 			"Failed to check for in-progress backups",
 			"databaseId",
-			databaseID,
+			database.ID,
 			"error",
 			err,
 		)
@@ -135,7 +147,7 @@ func (s *BackupsScheduler) StartBackup(databaseID uuid.UUID, isCallNotifier bool
 		s.logger.Warn(
 			"Backup already in progress for database, skipping new backup",
 			"databaseId",
-			databaseID,
+			database.ID,
 			"existingBackupId",
 			inProgressBackups[0].ID,
 		)
@@ -154,15 +166,20 @@ func (s *BackupsScheduler) StartBackup(databaseID uuid.UUID, isCallNotifier bool
 		return
 	}
 
-	fmt.Println("make backup")
+	backupID := uuid.New()
+	timestamp := time.Now().UTC()
+
 	backup := &backups_core.Backup{
+		ID:           backupID,
 		DatabaseID:   backupConfig.DatabaseID,
 		StorageID:    *backupConfig.StorageID,
 		Status:       backups_core.BackupStatusInProgress,
 		BackupSizeMb: 0,
-		CreatedAt:    time.Now().UTC(),
+		CreatedAt:    timestamp,
 	}
 
+	backup.GenerateFilename(database.Name)
+
 	if err := s.backupRepository.Save(backup); err != nil {
 		s.logger.Error(
 			"Failed to save backup",
@@ -214,8 +231,8 @@ func (s *BackupsScheduler) StartBackup(databaseID uuid.UUID, isCallNotifier bool
 		s.backupToNodeRelations[*leastBusyNodeID] = relation
 	} else {
 		s.backupToNodeRelations[*leastBusyNodeID] = BackupToNodeRelation{
-			NodeID:     *leastBusyNodeID,
-			BackupsIDs: []uuid.UUID{backup.ID},
+			*leastBusyNodeID,
+			[]uuid.UUID{backup.ID},
 		}
 	}
 
@@ -319,7 +336,13 @@ func (s *BackupsScheduler) runPendingBackups() error {
 				backupConfig.BackupInterval.Interval,
 			)
 
-			s.StartBackup(backupConfig.DatabaseID, remainedBackupTryCount == 1)
+			database, err := s.databaseService.GetDatabaseByID(backupConfig.DatabaseID)
+			if err != nil {
+				s.logger.Error("Failed to get database by ID", "error", err)
+				continue
+			}
+
+			s.StartBackup(database, remainedBackupTryCount == 1)
 			continue
 		}
 	}
@@ -418,7 +441,7 @@ func (s *BackupsScheduler) calculateLeastBusyNode() (*uuid.UUID, error) {
 	return &bestNode.ID, nil
 }
 
-func (s *BackupsScheduler) onBackupCompleted(nodeID uuid.UUID, backupID uuid.UUID) {
+func (s *BackupsScheduler) onBackupCompleted(nodeID, backupID uuid.UUID) {
 	// Verify this task is actually a backup (registry contains multiple task types)
 	_, err := s.backupRepository.FindByID(backupID)
 	if err != nil {

backend/internal/features/backups/backups/backuping/scheduler_test.go

@@ -1,6 +1,12 @@
 package backuping
 
 import (
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -12,11 +18,6 @@ import (
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
 	cache_utils "databasus-backend/internal/util/cache"
 	"databasus-backend/internal/util/period"
-	"testing"
-	"time"
-
-	"github.com/google/uuid"
-	"github.com/stretchr/testify/assert"
 )
 
 func Test_RunPendingBackups_WhenLastBackupWasYesterday_CreatesNewBackup(t *testing.T) {
@@ -57,7 +58,8 @@ func Test_RunPendingBackups_WhenLastBackupWasYesterday_CreatesNewBackup(t *testi
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -126,7 +128,8 @@ func Test_RunPendingBackups_WhenLastBackupWasRecentlyCompleted_SkipsBackup(t *te
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -194,7 +197,8 @@ func Test_RunPendingBackups_WhenLastBackupFailedAndRetriesDisabled_SkipsBackup(t
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 	backupConfig.IsRetryIfFailed = false
@@ -266,7 +270,8 @@ func Test_RunPendingBackups_WhenLastBackupFailedAndRetriesEnabled_CreatesNewBack
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 	backupConfig.IsRetryIfFailed = true
@@ -339,7 +344,8 @@ func Test_RunPendingBackups_WhenFailedBackupsExceedMaxRetries_SkipsBackup(t *tes
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 	backupConfig.IsRetryIfFailed = true
@@ -410,7 +416,8 @@ func Test_RunPendingBackups_WhenBackupsDisabled_SkipsBackup(t *testing.T) {
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = false
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -479,7 +486,8 @@ func Test_CheckDeadNodesAndFailBackups_WhenNodeDies_FailsBackupAndCleansUpRegist
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -492,7 +500,7 @@ func Test_CheckDeadNodesAndFailBackups_WhenNodeDies_FailsBackupAndCleansUpRegist
 	assert.NoError(t, err)
 
 	// Scheduler assigns backup to mock node
-	GetBackupsScheduler().StartBackup(database.ID, false)
+	GetBackupsScheduler().StartBackup(database, false)
 	time.Sleep(100 * time.Millisecond)
 
 	backups, err := backupRepository.FindByDatabaseID(database.ID)
@@ -582,7 +590,8 @@ func Test_OnBackupCompleted_WhenTaskIsNotBackup_SkipsProcessing(t *testing.T) {
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -595,7 +604,7 @@ func Test_OnBackupCompleted_WhenTaskIsNotBackup_SkipsProcessing(t *testing.T) {
 	assert.NoError(t, err)
 
 	// Start a backup and assign it to the node
-	GetBackupsScheduler().StartBackup(database.ID, false)
+	GetBackupsScheduler().StartBackup(database, false)
 	time.Sleep(100 * time.Millisecond)
 
 	backups, err := backupRepository.FindByDatabaseID(database.ID)
@@ -759,7 +768,8 @@ func Test_FailBackupsInProgress_WhenSchedulerStarts_CancelsBackupsAndUpdatesStat
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -872,7 +882,8 @@ func Test_StartBackup_WhenBackupCompletes_DecrementsActiveTaskCount(t *testing.T
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -892,7 +903,7 @@ func Test_StartBackup_WhenBackupCompletes_DecrementsActiveTaskCount(t *testing.T
 	t.Logf("Initial active tasks: %d", initialActiveTasks)
 
 	// Start backup
-	scheduler.StartBackup(database.ID, false)
+	scheduler.StartBackup(database, false)
 
 	// Wait for backup to complete
 	WaitForBackupCompletion(t, database.ID, 0, 10*time.Second)
@@ -975,7 +986,8 @@ func Test_StartBackup_WhenBackupFails_DecrementsActiveTaskCount(t *testing.T) {
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -995,7 +1007,7 @@ func Test_StartBackup_WhenBackupFails_DecrementsActiveTaskCount(t *testing.T) {
 	t.Logf("Initial active tasks: %d", initialActiveTasks)
 
 	// Start backup
-	scheduler.StartBackup(database.ID, false)
+	scheduler.StartBackup(database, false)
 
 	// Wait for backup to fail
 	WaitForBackupCompletion(t, database.ID, 0, 10*time.Second)
@@ -1069,7 +1081,8 @@ func Test_StartBackup_WhenBackupAlreadyInProgress_SkipsNewBackup(t *testing.T) {
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 
@@ -1088,7 +1101,7 @@ func Test_StartBackup_WhenBackupAlreadyInProgress_SkipsNewBackup(t *testing.T) {
 	assert.NoError(t, err)
 
 	// Try to start a new backup - should be skipped
-	GetBackupsScheduler().StartBackup(database.ID, false)
+	GetBackupsScheduler().StartBackup(database, false)
 
 	time.Sleep(200 * time.Millisecond)
 
@@ -1140,7 +1153,8 @@ func Test_RunPendingBackups_WhenLastBackupFailedWithIsSkipRetry_SkipsBackupEvenW
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig.IsBackupsEnabled = true
-	backupConfig.StorePeriod = period.PeriodWeek
+	backupConfig.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig.RetentionTimePeriod = period.PeriodWeek
 	backupConfig.Storage = storage
 	backupConfig.StorageID = &storage.ID
 	backupConfig.IsRetryIfFailed = true
@@ -1242,7 +1256,8 @@ func Test_StartBackup_When2BackupsStartedForDifferentDatabases_BothUseCasesAreCa
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig1.IsBackupsEnabled = true
-	backupConfig1.StorePeriod = period.PeriodWeek
+	backupConfig1.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig1.RetentionTimePeriod = period.PeriodWeek
 	backupConfig1.Storage = storage
 	backupConfig1.StorageID = &storage.ID
 
@@ -1259,7 +1274,8 @@ func Test_StartBackup_When2BackupsStartedForDifferentDatabases_BothUseCasesAreCa
 		TimeOfDay: &timeOfDay,
 	}
 	backupConfig2.IsBackupsEnabled = true
-	backupConfig2.StorePeriod = period.PeriodWeek
+	backupConfig2.RetentionPolicyType = backups_config.RetentionPolicyTypeTimePeriod
+	backupConfig2.RetentionTimePeriod = period.PeriodWeek
 	backupConfig2.Storage = storage
 	backupConfig2.StorageID = &storage.ID
 
@@ -1268,10 +1284,10 @@ func Test_StartBackup_When2BackupsStartedForDifferentDatabases_BothUseCasesAreCa
 
 	// Start 2 backups simultaneously
 	t.Log("Starting backup for database1")
-	scheduler.StartBackup(database1.ID, false)
+	scheduler.StartBackup(database1, false)
 
 	t.Log("Starting backup for database2")
-	scheduler.StartBackup(database2.ID, false)
+	scheduler.StartBackup(database2, false)
 
 	// Wait up to 10 seconds for both backups to complete
 	t.Log("Waiting for both backups to complete...")

backend/internal/features/backups/backups/backuping/testing.go

@@ -8,6 +8,9 @@ import (
 	"testing"
 	"time"
 
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	"databasus-backend/internal/features/backups/backups/usecases"
 	backups_config "databasus-backend/internal/features/backups/config"
@@ -19,9 +22,6 @@ import (
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
 	"databasus-backend/internal/util/encryption"
 	"databasus-backend/internal/util/logger"
-
-	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
 )
 
 func CreateTestRouter() *gin.Engine {

backend/internal/features/backups/backups/common/dto.go

@@ -1,17 +1,38 @@
 package common
 
-import backups_config "databasus-backend/internal/features/backups/config"
+import (
+	"errors"
 
-type BackupType string
+	"github.com/google/uuid"
 
-const (
-	BackupTypeDefault   BackupType = "DEFAULT"   // For MySQL, MongoDB, PostgreSQL legacy (-Fc)
-	BackupTypeDirectory BackupType = "DIRECTORY" // PostgreSQL directory type (-Fd)
+	backups_config "databasus-backend/internal/features/backups/config"
 )
 
 type BackupMetadata struct {
-	EncryptionSalt *string
-	EncryptionIV   *string
-	Encryption     backups_config.BackupEncryption
-	Type           BackupType
+	BackupID       uuid.UUID                       `json:"backupId"`
+	EncryptionSalt *string                         `json:"encryptionSalt"`
+	EncryptionIV   *string                         `json:"encryptionIV"`
+	Encryption     backups_config.BackupEncryption `json:"encryption"`
+}
+
+func (m *BackupMetadata) Validate() error {
+	if m.BackupID == uuid.Nil {
+		return errors.New("backup ID is required")
+	}
+
+	if m.Encryption == "" {
+		return errors.New("encryption is required")
+	}
+
+	if m.Encryption == backups_config.BackupEncryptionEncrypted {
+		if m.EncryptionSalt == nil {
+			return errors.New("encryption salt is required when encryption is enabled")
+		}
+
+		if m.EncryptionIV == nil {
+			return errors.New("encryption IV is required when encryption is enabled")
+		}
+	}
+
+	return nil
 }

backend/internal/features/backups/backups/common/interfaces.go

@@ -7,6 +7,10 @@ type CountingWriter struct {
 	BytesWritten int64
 }
 
+func NewCountingWriter(writer io.Writer) *CountingWriter {
+	return &CountingWriter{Writer: writer}
+}
+
 func (cw *CountingWriter) Write(p []byte) (n int, err error) {
 	n, err = cw.Writer.Write(p)
 	cw.BytesWritten += int64(n)
@@ -16,7 +20,3 @@ func (cw *CountingWriter) Write(p []byte) (n int, err error) {
 func (cw *CountingWriter) GetBytesWritten() int64 {
 	return cw.BytesWritten
 }
-
-func NewCountingWriter(writer io.Writer) *CountingWriter {
-	return &CountingWriter{Writer: writer}
-}

backend/internal/features/backups/backups/controllers/controller.go

@@ -1,11 +1,8 @@
-package backups
+package backups_controllers
 
 import (
 	"context"
-	backups_core "databasus-backend/internal/features/backups/backups/core"
-	backups_download "databasus-backend/internal/features/backups/backups/download"
-	"databasus-backend/internal/features/databases"
-	users_middleware "databasus-backend/internal/features/users/middleware"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -13,10 +10,18 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
+
+	backups_core "databasus-backend/internal/features/backups/backups/core"
+	backups_download "databasus-backend/internal/features/backups/backups/download"
+	backups_dto "databasus-backend/internal/features/backups/backups/dto"
+	backups_services "databasus-backend/internal/features/backups/backups/services"
+	"databasus-backend/internal/features/databases"
+	users_middleware "databasus-backend/internal/features/users/middleware"
+	files_utils "databasus-backend/internal/util/files"
 )
 
 type BackupController struct {
-	backupService *BackupService
+	backupService *backups_services.BackupService
 }
 
 func (c *BackupController) RegisterRoutes(router *gin.RouterGroup) {
@@ -41,7 +46,7 @@ func (c *BackupController) RegisterPublicRoutes(router *gin.RouterGroup) {
 // @Param database_id query string true "Database ID"
 // @Param limit query int false "Number of items per page" default(10)
 // @Param offset query int false "Offset for pagination" default(0)
-// @Success 200 {object} GetBackupsResponse
+// @Success 200 {object} backups_dto.GetBackupsResponse
 // @Failure 400
 // @Failure 401
 // @Failure 500
@@ -53,7 +58,7 @@ func (c *BackupController) GetBackups(ctx *gin.Context) {
 		return
 	}
 
-	var request GetBackupsRequest
+	var request backups_dto.GetBackupsRequest
 	if err := ctx.ShouldBindQuery(&request); err != nil {
 		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 		return
@@ -80,7 +85,7 @@ func (c *BackupController) GetBackups(ctx *gin.Context) {
 // @Tags backups
 // @Accept json
 // @Produce json
-// @Param request body MakeBackupRequest true "Backup creation data"
+// @Param request body backups_dto.MakeBackupRequest true "Backup creation data"
 // @Success 200 {object} map[string]string
 // @Failure 400
 // @Failure 401
@@ -93,7 +98,7 @@ func (c *BackupController) MakeBackup(ctx *gin.Context) {
 		return
 	}
 
-	var request MakeBackupRequest
+	var request backups_dto.MakeBackupRequest
 	if err := ctx.ShouldBindJSON(&request); err != nil {
 		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 		return
@@ -194,7 +199,7 @@ func (c *BackupController) GenerateDownloadToken(ctx *gin.Context) {
 
 	response, err := c.backupService.GenerateDownloadToken(user, id)
 	if err != nil {
-		if err == backups_download.ErrDownloadAlreadyInProgress {
+		if errors.Is(err, backups_download.ErrDownloadAlreadyInProgress) {
 			ctx.JSON(
 				http.StatusConflict,
 				gin.H{
@@ -245,7 +250,7 @@ func (c *BackupController) GetFile(ctx *gin.Context) {
 
 	downloadToken, rateLimiter, err := c.backupService.ValidateDownloadToken(token)
 	if err != nil {
-		if err == backups_download.ErrDownloadAlreadyInProgress {
+		if errors.Is(err, backups_download.ErrDownloadAlreadyInProgress) {
 			ctx.JSON(
 				http.StatusConflict,
 				gin.H{
@@ -304,16 +309,11 @@ func (c *BackupController) GetFile(ctx *gin.Context) {
 	_, err = io.Copy(ctx.Writer, rateLimitedReader)
 	if err != nil {
 		fmt.Printf("Error streaming file: %v\n", err)
-		return
 	}
 
 	c.backupService.WriteAuditLogForDownload(downloadToken.UserID, backup, database)
 }
 
-type MakeBackupRequest struct {
-	DatabaseID uuid.UUID `json:"database_id" binding:"required"`
-}
-
 func (c *BackupController) generateBackupFilename(
 	backup *backups_core.Backup,
 	database *databases.Database,
@@ -322,7 +322,7 @@ func (c *BackupController) generateBackupFilename(
 	timestamp := backup.CreatedAt.Format("2006-01-02_15-04-05")
 
 	// Sanitize database name for filename (replace spaces and special chars)
-	safeName := sanitizeFilename(database.Name)
+	safeName := files_utils.SanitizeFilename(database.Name)
 
 	// Determine extension based on database type
 	extension := c.getBackupExtension(database.Type)
@@ -346,33 +346,6 @@ func (c *BackupController) getBackupExtension(
 	}
 }
 
-func sanitizeFilename(name string) string {
-	// Replace characters that are invalid in filenames
-	replacer := map[rune]rune{
-		' ':  '_',
-		'/':  '-',
-		'\\': '-',
-		':':  '-',
-		'*':  '-',
-		'?':  '-',
-		'"':  '-',
-		'<':  '-',
-		'>':  '-',
-		'|':  '-',
-	}
-
-	result := make([]rune, 0, len(name))
-	for _, char := range name {
-		if replacement, exists := replacer[char]; exists {
-			result = append(result, replacement)
-		} else {
-			result = append(result, char)
-		}
-	}
-
-	return string(result)
-}
-
 func (c *BackupController) startDownloadHeartbeat(ctx context.Context, userID uuid.UUID) {
 	ticker := time.NewTicker(backups_download.GetDownloadHeartbeatInterval())
 	defer ticker.Stop()

backend/internal/features/backups/backups/controllers/controller_test.go

@@ -1,4 +1,4 @@
-package backups
+package backups_controllers
 
 import (
 	"context"
@@ -7,6 +7,8 @@ import (
 	"io"
 	"log/slog"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"testing"
@@ -18,13 +20,18 @@ import (
 
 	"databasus-backend/internal/config"
 	audit_logs "databasus-backend/internal/features/audit_logs"
+	"databasus-backend/internal/features/backups/backups/backuping"
+	backups_common "databasus-backend/internal/features/backups/backups/common"
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_download "databasus-backend/internal/features/backups/backups/download"
+	backups_dto "databasus-backend/internal/features/backups/backups/dto"
+	backups_services "databasus-backend/internal/features/backups/backups/services"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
 	"databasus-backend/internal/features/databases/databases/postgresql"
 	"databasus-backend/internal/features/storages"
 	local_storage "databasus-backend/internal/features/storages/models/local"
+	task_cancellation "databasus-backend/internal/features/tasks/cancellation"
 	users_dto "databasus-backend/internal/features/users/dto"
 	users_enums "databasus-backend/internal/features/users/enums"
 	users_services "databasus-backend/internal/features/users/services"
@@ -32,6 +39,7 @@ import (
 	workspaces_models "databasus-backend/internal/features/workspaces/models"
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
 	"databasus-backend/internal/util/encryption"
+	files_utils "databasus-backend/internal/util/files"
 	test_utils "databasus-backend/internal/util/testing"
 	"databasus-backend/internal/util/tools"
 )
@@ -114,7 +122,7 @@ func Test_GetBackups_PermissionsEnforced(t *testing.T) {
 			)
 
 			if tt.expectSuccess {
-				var response GetBackupsResponse
+				var response backups_dto.GetBackupsResponse
 				err := json.Unmarshal(testResp.Body, &response)
 				assert.NoError(t, err)
 				assert.GreaterOrEqual(t, len(response.Backups), 1)
@@ -209,7 +217,7 @@ func Test_CreateBackup_PermissionsEnforced(t *testing.T) {
 				testUserToken = nonMember.Token
 			}
 
-			request := MakeBackupRequest{DatabaseID: database.ID}
+			request := backups_dto.MakeBackupRequest{DatabaseID: database.ID}
 			testResp := test_utils.MakePostRequest(
 				t,
 				router,
@@ -240,7 +248,7 @@ func Test_CreateBackup_AuditLogWritten(t *testing.T) {
 	database := createTestDatabase("Test Database", workspace.ID, owner.Token, router)
 	enableBackupForDatabase(database.ID)
 
-	request := MakeBackupRequest{DatabaseID: database.ID}
+	request := backups_dto.MakeBackupRequest{DatabaseID: database.ID}
 	test_utils.MakePostRequest(
 		t,
 		router,
@@ -368,7 +376,7 @@ func Test_DeleteBackup_PermissionsEnforced(t *testing.T) {
 				ownerUser, err := userService.GetUserFromToken(owner.Token)
 				assert.NoError(t, err)
 
-				response, err := GetBackupService().GetBackups(ownerUser, database.ID, 10, 0)
+				response, err := backups_services.GetBackupService().GetBackups(ownerUser, database.ID, 10, 0)
 				assert.NoError(t, err)
 				assert.Equal(t, 0, len(response.Backups))
 			}
@@ -956,7 +964,7 @@ func Test_SanitizeFilename(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.input, func(t *testing.T) {
-			result := sanitizeFilename(tt.input)
+			result := files_utils.SanitizeFilename(tt.input)
 			assert.Equal(t, tt.expected, result)
 		})
 	}
@@ -994,7 +1002,7 @@ func Test_CancelBackup_InProgressBackup_SuccessfullyCancelled(t *testing.T) {
 	assert.NoError(t, err)
 
 	// Register a cancellable context for the backup
-	GetBackupService().taskCancelManager.RegisterTask(backup.ID, func() {})
+	task_cancellation.GetTaskCancelManager().RegisterTask(backup.ID, func() {})
 
 	resp := test_utils.MakePostRequest(
 		t,
@@ -1086,7 +1094,7 @@ func Test_ConcurrentDownloadPrevention(t *testing.T) {
 
 	time.Sleep(50 * time.Millisecond)
 
-	service := GetBackupService()
+	service := backups_services.GetBackupService()
 	if !service.IsDownloadInProgress(owner.UserID) {
 		t.Log("Warning: First download completed before we could test concurrency")
 		<-downloadComplete
@@ -1187,7 +1195,7 @@ func Test_GenerateDownloadToken_BlockedWhenDownloadInProgress(t *testing.T) {
 
 	time.Sleep(50 * time.Millisecond)
 
-	service := GetBackupService()
+	service := backups_services.GetBackupService()
 	if !service.IsDownloadInProgress(owner.UserID) {
 		t.Log("Warning: First download completed before we could test token generation blocking")
 		<-downloadComplete
@@ -1244,6 +1252,86 @@ func Test_GenerateDownloadToken_BlockedWhenDownloadInProgress(t *testing.T) {
 	workspaces_testing.RemoveTestWorkspace(workspace, router)
 }
 
+func Test_MakeBackup_VerifyBackupAndMetadataFilesExistInStorage(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+
+	database, _, storage := createTestDatabaseWithBackups(workspace, owner, router)
+
+	backuperNode := backuping.CreateTestBackuperNode()
+	backuperCancel := backuping.StartBackuperNodeForTest(t, backuperNode)
+	defer backuping.StopBackuperNodeForTest(t, backuperCancel, backuperNode)
+
+	scheduler := backuping.CreateTestScheduler()
+	schedulerCancel := backuping.StartSchedulerForTest(t, scheduler)
+	defer schedulerCancel()
+
+	backupRepo := &backups_core.BackupRepository{}
+	initialBackups, err := backupRepo.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+
+	request := backups_dto.MakeBackupRequest{DatabaseID: database.ID}
+	test_utils.MakePostRequest(
+		t,
+		router,
+		"/api/v1/backups",
+		"Bearer "+owner.Token,
+		request,
+		http.StatusOK,
+	)
+
+	backuping.WaitForBackupCompletion(t, database.ID, len(initialBackups), 30*time.Second)
+
+	backups, err := backupRepo.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+	assert.Greater(t, len(backups), len(initialBackups))
+
+	backup := backups[0]
+	assert.Equal(t, backups_core.BackupStatusCompleted, backup.Status)
+
+	storageService := storages.GetStorageService()
+	backupStorage, err := storageService.GetStorageByID(backup.StorageID)
+	assert.NoError(t, err)
+
+	encryptor := encryption.GetFieldEncryptor()
+
+	backupFile, err := backupStorage.GetFile(encryptor, backup.FileName)
+	assert.NoError(t, err)
+	backupFile.Close()
+
+	metadataFile, err := backupStorage.GetFile(encryptor, backup.FileName+".metadata")
+	assert.NoError(t, err)
+
+	metadataContent, err := io.ReadAll(metadataFile)
+	assert.NoError(t, err)
+	metadataFile.Close()
+
+	var storageMetadata backups_common.BackupMetadata
+	err = json.Unmarshal(metadataContent, &storageMetadata)
+	assert.NoError(t, err)
+
+	assert.Equal(t, backup.ID, storageMetadata.BackupID)
+
+	if backup.EncryptionSalt != nil && storageMetadata.EncryptionSalt != nil {
+		assert.Equal(t, *backup.EncryptionSalt, *storageMetadata.EncryptionSalt)
+	}
+
+	if backup.EncryptionIV != nil && storageMetadata.EncryptionIV != nil {
+		assert.Equal(t, *backup.EncryptionIV, *storageMetadata.EncryptionIV)
+	}
+
+	assert.Equal(t, backup.Encryption, storageMetadata.Encryption)
+
+	err = backupRepo.DeleteByID(backup.ID)
+	assert.NoError(t, err)
+
+	databases.RemoveTestDatabase(database)
+	time.Sleep(50 * time.Millisecond)
+	storages.RemoveTestStorage(storage.ID)
+	workspaces_testing.RemoveTestWorkspace(workspace, router)
+}
+
 func createTestRouter() *gin.Engine {
 	return CreateTestRouter()
 }
@@ -1366,11 +1454,24 @@ func createTestBackup(
 		panic(err)
 	}
 
-	storages, err := storages.GetStorageService().GetStorages(user, *database.WorkspaceID)
-	if err != nil || len(storages) == 0 {
+	loadedStorages, err := storages.GetStorageService().GetStorages(user, *database.WorkspaceID)
+	if err != nil || len(loadedStorages) == 0 {
 		panic("No storage found for workspace")
 	}
 
+	// Filter out system storages
+	var nonSystemStorages []*storages.Storage
+	for _, storage := range loadedStorages {
+		if !storage.IsSystem {
+			nonSystemStorages = append(nonSystemStorages, storage)
+		}
+	}
+	if len(nonSystemStorages) == 0 {
+		panic("No non-system storage found for workspace")
+	}
+
+	storages := nonSystemStorages
+
 	backup := &backups_core.Backup{
 		ID:               uuid.New(),
 		DatabaseID:       database.ID,
@@ -1394,7 +1495,7 @@ func createTestBackup(
 		context.Background(),
 		encryption.GetFieldEncryptor(),
 		logger,
-		backup.ID,
+		backup.ID.String(),
 		reader,
 	); err != nil {
 		panic(fmt.Sprintf("Failed to create test backup file: %v", err))
@@ -1404,7 +1505,7 @@ func createTestBackup(
 }
 
 func createExpiredDownloadToken(backupID, userID uuid.UUID) string {
-	tokenService := GetBackupService().downloadTokenService
+	tokenService := backups_download.GetDownloadTokenService()
 	token, err := tokenService.Generate(backupID, userID)
 	if err != nil {
 		panic(fmt.Sprintf("Failed to generate download token: %v", err))
@@ -1707,3 +1808,84 @@ func Test_BandwidthThrottling_DynamicAdjustment(t *testing.T) {
 	storages.RemoveTestStorage(storage.ID)
 	workspaces_testing.RemoveTestWorkspace(workspace, router)
 }
+
+func Test_DeleteBackup_RemovesBackupAndMetadataFilesFromDisk(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+
+	database := createTestDatabase("Test Database", workspace.ID, owner.Token, router)
+	storage := createTestStorage(workspace.ID)
+
+	configService := backups_config.GetBackupConfigService()
+	backupConfig, err := configService.GetBackupConfigByDbId(database.ID)
+	assert.NoError(t, err)
+
+	backupConfig.IsBackupsEnabled = true
+	backupConfig.StorageID = &storage.ID
+	backupConfig.Storage = storage
+	_, err = configService.SaveBackupConfig(backupConfig)
+	assert.NoError(t, err)
+
+	defer func() {
+		databases.RemoveTestDatabase(database)
+		time.Sleep(50 * time.Millisecond)
+		storages.RemoveTestStorage(storage.ID)
+		workspaces_testing.RemoveTestWorkspace(workspace, router)
+	}()
+
+	backuperNode := backuping.CreateTestBackuperNode()
+	backuperCancel := backuping.StartBackuperNodeForTest(t, backuperNode)
+	defer backuping.StopBackuperNodeForTest(t, backuperCancel, backuperNode)
+
+	scheduler := backuping.CreateTestScheduler()
+	schedulerCancel := backuping.StartSchedulerForTest(t, scheduler)
+	defer schedulerCancel()
+
+	backupRepo := &backups_core.BackupRepository{}
+	initialBackups, err := backupRepo.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+
+	request := backups_dto.MakeBackupRequest{DatabaseID: database.ID}
+	test_utils.MakePostRequest(
+		t,
+		router,
+		"/api/v1/backups",
+		"Bearer "+owner.Token,
+		request,
+		http.StatusOK,
+	)
+
+	backuping.WaitForBackupCompletion(t, database.ID, len(initialBackups), 30*time.Second)
+
+	backups, err := backupRepo.FindByDatabaseID(database.ID)
+	assert.NoError(t, err)
+	assert.Greater(t, len(backups), len(initialBackups))
+
+	backup := backups[0]
+	assert.Equal(t, backups_core.BackupStatusCompleted, backup.Status)
+
+	dataFolder := config.GetEnv().DataFolder
+	backupFilePath := filepath.Join(dataFolder, backup.FileName)
+	metadataFilePath := filepath.Join(dataFolder, backup.FileName+".metadata")
+
+	_, err = os.Stat(backupFilePath)
+	assert.NoError(t, err, "backup file should exist on disk before deletion")
+
+	_, err = os.Stat(metadataFilePath)
+	assert.NoError(t, err, "metadata file should exist on disk before deletion")
+
+	test_utils.MakeDeleteRequest(
+		t,
+		router,
+		fmt.Sprintf("/api/v1/backups/%s", backup.ID.String()),
+		"Bearer "+owner.Token,
+		http.StatusNoContent,
+	)
+
+	_, err = os.Stat(backupFilePath)
+	assert.True(t, os.IsNotExist(err), "backup file should be removed from disk after deletion")
+
+	_, err = os.Stat(metadataFilePath)
+	assert.True(t, os.IsNotExist(err), "metadata file should be removed from disk after deletion")
+}

backend/internal/features/backups/backups/controllers/di.go

@@ -0,0 +1,23 @@
+package backups_controllers
+
+import (
+	backups_services "databasus-backend/internal/features/backups/backups/services"
+	"databasus-backend/internal/features/databases"
+)
+
+var backupController = &BackupController{
+	backups_services.GetBackupService(),
+}
+
+func GetBackupController() *BackupController {
+	return backupController
+}
+
+var postgresWalBackupController = &PostgreWalBackupController{
+	databases.GetDatabaseService(),
+	backups_services.GetWalService(),
+}
+
+func GetPostgresWalBackupController() *PostgreWalBackupController {
+	return postgresWalBackupController
+}

backend/internal/features/backups/backups/controllers/postgres_wal_controller.go

@@ -0,0 +1,291 @@
+package backups_controllers
+
+import (
+	"io"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+
+	backups_core "databasus-backend/internal/features/backups/backups/core"
+	backups_dto "databasus-backend/internal/features/backups/backups/dto"
+	backups_services "databasus-backend/internal/features/backups/backups/services"
+	"databasus-backend/internal/features/databases"
+)
+
+// PostgreWalBackupController handles WAL backup endpoints used by the databasus-cli agent.
+// Authentication is via a plain agent token in the Authorization header (no Bearer prefix).
+type PostgreWalBackupController struct {
+	databaseService *databases.DatabaseService
+	walService      *backups_services.PostgreWalBackupService
+}
+
+func (c *PostgreWalBackupController) RegisterRoutes(router *gin.RouterGroup) {
+	walRoutes := router.Group("/backups/postgres/wal")
+
+	walRoutes.GET("/next-full-backup-time", c.GetNextFullBackupTime)
+	walRoutes.POST("/error", c.ReportError)
+	walRoutes.POST("/upload", c.Upload)
+	walRoutes.GET("/restore/plan", c.GetRestorePlan)
+	walRoutes.GET("/restore/download", c.DownloadBackupFile)
+}
+
+// GetNextFullBackupTime
+// @Summary Get next full backup time
+// @Description Returns the next scheduled full basebackup time for the authenticated database
+// @Tags backups-wal
+// @Produce json
+// @Security AgentToken
+// @Success 200 {object} backups_dto.GetNextFullBackupTimeResponse
+// @Failure 401 {object} map[string]string
+// @Failure 500 {object} map[string]string
+// @Router /backups/postgres/wal/next-full-backup-time [get]
+func (c *PostgreWalBackupController) GetNextFullBackupTime(ctx *gin.Context) {
+	database, err := c.getDatabase(ctx)
+	if err != nil {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "invalid agent token"})
+		return
+	}
+
+	response, err := c.walService.GetNextFullBackupTime(database)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	ctx.JSON(http.StatusOK, response)
+}
+
+// ReportError
+// @Summary Report agent error
+// @Description Records a fatal error from the agent against the database record and marks it as errored
+// @Tags backups-wal
+// @Accept json
+// @Security AgentToken
+// @Param request body backups_dto.ReportErrorRequest true "Error details"
+// @Success 200
+// @Failure 400 {object} map[string]string
+// @Failure 401 {object} map[string]string
+// @Failure 500 {object} map[string]string
+// @Router /backups/postgres/wal/error [post]
+func (c *PostgreWalBackupController) ReportError(ctx *gin.Context) {
+	database, err := c.getDatabase(ctx)
+	if err != nil {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "invalid agent token"})
+		return
+	}
+
+	var request backups_dto.ReportErrorRequest
+	if err := ctx.ShouldBindJSON(&request); err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if err := c.walService.ReportError(database, request.Error); err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	ctx.Status(http.StatusOK)
+}
+
+// Upload
+// @Summary Stream upload a basebackup or WAL segment
+// @Description Accepts a zstd-compressed binary stream and stores it in the database's configured storage.
+// The server generates the storage filename; agents do not control the destination path.
+// For WAL segment uploads the server validates the WAL chain and returns 409 if a gap is detected
+// or 400 if no full backup exists yet (agent should trigger a full basebackup in both cases).
+// @Tags backups-wal
+// @Accept application/octet-stream
+// @Produce json
+// @Security AgentToken
+// @Param X-Upload-Type header string true "Upload type" Enums(basebackup, wal)
+// @Param X-Wal-Segment-Name header string false "24-hex WAL segment identifier (required for wal uploads, e.g. 0000000100000001000000AB)"
+// @Param X-Wal-Segment-Size header int false "WAL segment size in bytes reported by the PostgreSQL instance (default: 16777216)"
+// @Param fullBackupWalStartSegment query string false "First WAL segment needed to make the basebackup consistent (required for basebackup uploads)"
+// @Param fullBackupWalStopSegment query string false "Last WAL segment included in the basebackup (required for basebackup uploads)"
+// @Success 204
+// @Failure 400 {object} backups_dto.UploadGapResponse "No full backup exists (error: no_full_backup)"
+// @Failure 401 {object} map[string]string
+// @Failure 409 {object} backups_dto.UploadGapResponse "WAL chain gap detected (error: gap_detected)"
+// @Failure 500 {object} map[string]string
+// @Router /backups/postgres/wal/upload [post]
+func (c *PostgreWalBackupController) Upload(ctx *gin.Context) {
+	database, err := c.getDatabase(ctx)
+	if err != nil {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "invalid agent token"})
+		return
+	}
+
+	uploadType := backups_core.PgWalUploadType(ctx.GetHeader("X-Upload-Type"))
+	if uploadType != backups_core.PgWalUploadTypeBasebackup &&
+		uploadType != backups_core.PgWalUploadTypeWal {
+		ctx.JSON(
+			http.StatusBadRequest,
+			gin.H{"error": "X-Upload-Type must be 'basebackup' or 'wal'"},
+		)
+		return
+	}
+
+	walSegmentName := ""
+	if uploadType == backups_core.PgWalUploadTypeWal {
+		walSegmentName = ctx.GetHeader("X-Wal-Segment-Name")
+		if walSegmentName == "" {
+			ctx.JSON(
+				http.StatusBadRequest,
+				gin.H{"error": "X-Wal-Segment-Name is required for wal uploads"},
+			)
+			return
+		}
+	}
+
+	if uploadType == backups_core.PgWalUploadTypeBasebackup {
+		if ctx.Query("fullBackupWalStartSegment") == "" ||
+			ctx.Query("fullBackupWalStopSegment") == "" {
+			ctx.JSON(
+				http.StatusBadRequest,
+				gin.H{
+					"error": "fullBackupWalStartSegment and fullBackupWalStopSegment are required for basebackup uploads",
+				},
+			)
+			return
+		}
+	}
+
+	walSegmentSizeBytes := int64(0)
+	if raw := ctx.GetHeader("X-Wal-Segment-Size"); raw != "" {
+		parsed, parseErr := strconv.ParseInt(raw, 10, 64)
+		if parseErr != nil || parsed <= 0 {
+			ctx.JSON(
+				http.StatusBadRequest,
+				gin.H{"error": "X-Wal-Segment-Size must be a positive integer"},
+			)
+			return
+		}
+
+		walSegmentSizeBytes = parsed
+	}
+
+	gapResp, uploadErr := c.walService.UploadWal(
+		ctx.Request.Context(),
+		database,
+		uploadType,
+		walSegmentName,
+		ctx.Query("fullBackupWalStartSegment"),
+		ctx.Query("fullBackupWalStopSegment"),
+		walSegmentSizeBytes,
+		ctx.Request.Body,
+	)
+
+	if uploadErr != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": uploadErr.Error()})
+		return
+	}
+
+	if gapResp != nil {
+		if gapResp.Error == "no_full_backup" {
+			ctx.JSON(http.StatusBadRequest, gapResp)
+			return
+		}
+
+		ctx.JSON(http.StatusConflict, gapResp)
+		return
+	}
+
+	ctx.Status(http.StatusNoContent)
+}
+
+// GetRestorePlan
+// @Summary Get restore plan
+// @Description Resolves the full backup and all required WAL segments needed for recovery. Validates the WAL chain is continuous.
+// @Tags backups-wal
+// @Produce json
+// @Security AgentToken
+// @Param backupId query string false "UUID of a specific full backup to restore from; defaults to the most recent"
+// @Success 200 {object} backups_dto.GetRestorePlanResponse
+// @Failure 400 {object} map[string]string "Broken WAL chain or no backups available"
+// @Failure 401 {object} map[string]string
+// @Failure 500 {object} map[string]string
+// @Router /backups/postgres/wal/restore/plan [get]
+func (c *PostgreWalBackupController) GetRestorePlan(ctx *gin.Context) {
+	database, err := c.getDatabase(ctx)
+	if err != nil {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "invalid agent token"})
+		return
+	}
+
+	var backupID *uuid.UUID
+	if raw := ctx.Query("backupId"); raw != "" {
+		parsed, parseErr := uuid.Parse(raw)
+		if parseErr != nil {
+			ctx.JSON(http.StatusBadRequest, gin.H{"error": "invalid backupId format"})
+			return
+		}
+
+		backupID = &parsed
+	}
+
+	response, planErr, err := c.walService.GetRestorePlan(database, backupID)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	if planErr != nil {
+		ctx.JSON(http.StatusBadRequest, planErr)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, response)
+}
+
+// DownloadBackupFile
+// @Summary Download a backup or WAL segment file for restore
+// @Description Retrieves the backup file by ID (validated against the authenticated database), decrypts it server-side if encrypted, and streams the zstd-compressed result to the agent
+// @Tags backups-wal
+// @Produce application/octet-stream
+// @Security AgentToken
+// @Param backupId query string true "Backup ID from the restore plan response"
+// @Success 200 {file} file
+// @Failure 400 {object} map[string]string
+// @Failure 401 {object} map[string]string
+// @Router /backups/postgres/wal/restore/download [get]
+func (c *PostgreWalBackupController) DownloadBackupFile(ctx *gin.Context) {
+	database, err := c.getDatabase(ctx)
+	if err != nil {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "invalid agent token"})
+		return
+	}
+
+	backupIDRaw := ctx.Query("backupId")
+	if backupIDRaw == "" {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "backupId is required"})
+		return
+	}
+
+	backupID, err := uuid.Parse(backupIDRaw)
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "invalid backupId format"})
+		return
+	}
+
+	reader, err := c.walService.DownloadBackupFile(database, backupID)
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	defer func() { _ = reader.Close() }()
+
+	ctx.Header("Content-Type", "application/octet-stream")
+	ctx.Status(http.StatusOK)
+
+	_, _ = io.Copy(ctx.Writer, reader)
+}
+
+func (c *PostgreWalBackupController) getDatabase(
+	ctx *gin.Context,
+) (*databases.Database, error) {
+	token := ctx.GetHeader("Authorization")
+	return c.databaseService.GetDatabaseByAgentToken(token)
+}

backend/internal/features/backups/backups/controllers/testing.go

@@ -1,17 +1,17 @@
-package backups
+package backups_controllers
 
 import (
 	"testing"
 	"time"
 
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
 	workspaces_controllers "databasus-backend/internal/features/workspaces/controllers"
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
-
-	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
 )
 
 func CreateTestRouter() *gin.Engine {
@@ -41,7 +41,7 @@ func WaitForBackupCompletion(
 	deadline := time.Now().UTC().Add(timeout)
 
 	for time.Now().UTC().Before(deadline) {
-		backups, err := backupRepository.FindByDatabaseID(databaseID)
+		backups, err := backups_core.GetBackupRepository().FindByDatabaseID(databaseID)
 		if err != nil {
 			t.Logf("WaitForBackupCompletion: error finding backups: %v", err)
 			time.Sleep(50 * time.Millisecond)

backend/internal/features/backups/backups/core/di.go

@@ -0,0 +1,7 @@
+package backups_core
+
+var backupRepository = &BackupRepository{}
+
+func GetBackupRepository() *BackupRepository {
+	return backupRepository
+}

backend/internal/features/backups/backups/core/enums.go

@@ -8,3 +8,10 @@ const (
 	BackupStatusFailed     BackupStatus = "FAILED"
 	BackupStatusCanceled   BackupStatus = "CANCELED"
 )
+
+type PgWalUploadType string
+
+const (
+	PgWalUploadTypeBasebackup PgWalUploadType = "basebackup"
+	PgWalUploadTypeWal        PgWalUploadType = "wal"
+)

backend/internal/features/backups/backups/core/interfaces.go

@@ -8,8 +8,6 @@ import (
 	"databasus-backend/internal/features/databases"
 	"databasus-backend/internal/features/notifiers"
 	"databasus-backend/internal/features/storages"
-
-	"github.com/google/uuid"
 )
 
 type NotificationSender interface {
@@ -23,7 +21,7 @@ type NotificationSender interface {
 type CreateBackupUsecase interface {
 	Execute(
 		ctx context.Context,
-		backupID uuid.UUID,
+		backup *Backup,
 		backupConfig *backups_config.BackupConfig,
 		database *databases.Database,
 		storage *storages.Storage,

backend/internal/features/backups/backups/core/model.go

@@ -1,14 +1,25 @@
 package backups_core
 
 import (
-	backups_config "databasus-backend/internal/features/backups/config"
+	"fmt"
 	"time"
 
 	"github.com/google/uuid"
+
+	backups_config "databasus-backend/internal/features/backups/config"
+	files_utils "databasus-backend/internal/util/files"
+)
+
+type PgWalBackupType string
+
+const (
+	PgWalBackupTypeFullBackup PgWalBackupType = "PG_FULL_BACKUP"
+	PgWalBackupTypeWalSegment PgWalBackupType = "PG_WAL_SEGMENT"
 )
 
 type Backup struct {
-	ID uuid.UUID `json:"id" gorm:"column:id;type:uuid;primaryKey"`
+	ID       uuid.UUID `json:"id"       gorm:"column:id;type:uuid;primaryKey"`
+	FileName string    `json:"fileName" gorm:"column:file_name;type:text;not null"`
 
 	DatabaseID uuid.UUID `json:"databaseId" gorm:"column:database_id;type:uuid;not null"`
 	StorageID  uuid.UUID `json:"storageId"  gorm:"column:storage_id;type:uuid;not null"`
@@ -25,5 +36,23 @@ type Backup struct {
 	EncryptionIV   *string                         `json:"-"          gorm:"column:encryption_iv"`
 	Encryption     backups_config.BackupEncryption `json:"encryption" gorm:"column:encryption;type:text;not null;default:'NONE'"`
 
+	// Postgres WAL backup specific fields
+	PgWalBackupType                 *PgWalBackupType `json:"pgWalBackupType"                 gorm:"column:pg_wal_backup_type;type:text"`
+	PgFullBackupWalStartSegmentName *string          `json:"pgFullBackupWalStartSegmentName" gorm:"column:pg_wal_start_segment;type:text"`
+	PgFullBackupWalStopSegmentName  *string          `json:"pgFullBackupWalStopSegmentName"  gorm:"column:pg_wal_stop_segment;type:text"`
+	PgVersion                       *string          `json:"pgVersion"                       gorm:"column:pg_version;type:text"`
+	PgWalSegmentName                *string          `json:"pgWalSegmentName"                gorm:"column:pg_wal_segment_name;type:text"`
+
 	CreatedAt time.Time `json:"createdAt" gorm:"column:created_at"`
 }
+
+func (b *Backup) GenerateFilename(dbName string) {
+	timestamp := time.Now().UTC()
+
+	b.FileName = fmt.Sprintf(
+		"%s-%s-%s",
+		files_utils.SanitizeFilename(dbName),
+		timestamp.Format("20060102-150405"),
+		b.ID.String(),
+	)
+}

backend/internal/features/backups/backups/core/repository.go

@@ -1,13 +1,13 @@
 package backups_core
 
 import (
-	"databasus-backend/internal/storage"
 	"errors"
-
 	"time"
 
 	"github.com/google/uuid"
 	"gorm.io/gorm"
+
+	"databasus-backend/internal/storage"
 )
 
 type BackupRepository struct{}
@@ -88,7 +88,7 @@ func (r *BackupRepository) FindLastByDatabaseID(databaseID uuid.UUID) (*Backup,
 		Where("database_id = ?", databaseID).
 		Order("created_at DESC").
 		First(&backup).Error; err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, nil
 		}
 
@@ -245,3 +245,134 @@ func (r *BackupRepository) FindOldestByDatabaseExcludingInProgress(
 
 	return backups, nil
 }
+
+func (r *BackupRepository) FindCompletedFullWalBackupByID(
+	databaseID uuid.UUID,
+	backupID uuid.UUID,
+) (*Backup, error) {
+	var backup Backup
+
+	err := storage.
+		GetDb().
+		Where(
+			"database_id = ? AND id = ? AND pg_wal_backup_type = ? AND status = ?",
+			databaseID,
+			backupID,
+			PgWalBackupTypeFullBackup,
+			BackupStatusCompleted,
+		).
+		First(&backup).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &backup, nil
+}
+
+func (r *BackupRepository) FindCompletedWalSegmentsAfter(
+	databaseID uuid.UUID,
+	afterSegmentName string,
+) ([]*Backup, error) {
+	var backups []*Backup
+
+	err := storage.
+		GetDb().
+		Where(
+			"database_id = ? AND pg_wal_backup_type = ? AND pg_wal_segment_name >= ? AND status = ?",
+			databaseID,
+			PgWalBackupTypeWalSegment,
+			afterSegmentName,
+			BackupStatusCompleted,
+		).
+		Order("pg_wal_segment_name ASC").
+		Find(&backups).Error
+	if err != nil {
+		return nil, err
+	}
+
+	return backups, nil
+}
+
+func (r *BackupRepository) FindLastCompletedFullWalBackupByDatabaseID(
+	databaseID uuid.UUID,
+) (*Backup, error) {
+	var backup Backup
+
+	err := storage.
+		GetDb().
+		Where(
+			"database_id = ? AND pg_wal_backup_type = ? AND status = ?",
+			databaseID,
+			PgWalBackupTypeFullBackup,
+			BackupStatusCompleted,
+		).
+		Order("created_at DESC").
+		First(&backup).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &backup, nil
+}
+
+func (r *BackupRepository) FindWalSegmentByName(
+	databaseID uuid.UUID,
+	segmentName string,
+) (*Backup, error) {
+	var backup Backup
+
+	err := storage.
+		GetDb().
+		Where(
+			"database_id = ? AND pg_wal_backup_type = ? AND pg_wal_segment_name = ?",
+			databaseID,
+			PgWalBackupTypeWalSegment,
+			segmentName,
+		).
+		First(&backup).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &backup, nil
+}
+
+func (r *BackupRepository) FindLastWalSegmentAfter(
+	databaseID uuid.UUID,
+	afterSegmentName string,
+) (*Backup, error) {
+	var backup Backup
+
+	err := storage.
+		GetDb().
+		Where(
+			"database_id = ? AND pg_wal_backup_type = ? AND pg_wal_segment_name > ? AND status = ?",
+			databaseID,
+			PgWalBackupTypeWalSegment,
+			afterSegmentName,
+			BackupStatusCompleted,
+		).
+		Order("pg_wal_segment_name DESC").
+		First(&backup).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &backup, nil
+}

backend/internal/features/backups/backups/download/di.go

@@ -13,9 +13,11 @@ var downloadTokenRepository = &DownloadTokenRepository{}
 
 var downloadTracker = NewDownloadTracker(cache_utils.GetValkeyClient())
 
-var bandwidthManager *BandwidthManager
-var downloadTokenService *DownloadTokenService
-var downloadTokenBackgroundService *DownloadTokenBackgroundService
+var (
+	bandwidthManager               *BandwidthManager
+	downloadTokenService           *DownloadTokenService
+	downloadTokenBackgroundService *DownloadTokenBackgroundService
+)
 
 func init() {
 	env := config.GetEnv()

backend/internal/features/backups/backups/download/rate_limiter.go

@@ -66,9 +66,7 @@ func (rl *RateLimiter) Wait(bytes int64) {
 		tokensNeeded := float64(bytes) - rl.availableTokens
 		waitTime := time.Duration(tokensNeeded/float64(rl.bytesPerSecond)*1000) * time.Millisecond
 
-		if waitTime < time.Millisecond {
-			waitTime = time.Millisecond
-		}
+		waitTime = max(waitTime, time.Millisecond)
 
 		rl.mu.Unlock()
 		time.Sleep(waitTime)

backend/internal/features/backups/backups/download/repository.go

@@ -2,12 +2,14 @@ package backups_download
 
 import (
 	"crypto/rand"
-	"databasus-backend/internal/storage"
 	"encoding/base64"
+	"errors"
 	"time"
 
 	"github.com/google/uuid"
 	"gorm.io/gorm"
+
+	"databasus-backend/internal/storage"
 )
 
 type DownloadTokenRepository struct{}
@@ -28,9 +30,8 @@ func (r *DownloadTokenRepository) FindByToken(token string) (*DownloadToken, err
 	err := storage.GetDb().
 		Where("token = ?", token).
 		First(&downloadToken).Error
-
 	if err != nil {
-		if err == gorm.ErrRecordNotFound {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, nil
 		}
 		return nil, err

backend/internal/features/backups/backups/download/tracking.go

@@ -1,12 +1,13 @@
 package backups_download
 
 import (
-	cache_utils "databasus-backend/internal/util/cache"
 	"errors"
 	"time"
 
 	"github.com/google/uuid"
 	"github.com/valkey-io/valkey-go"
+
+	cache_utils "databasus-backend/internal/util/cache"
 )
 
 const (
@@ -16,9 +17,7 @@ const (
 	downloadHeartbeatDelay = 3 * time.Second
 )
 
-var (
-	ErrDownloadAlreadyInProgress = errors.New("download already in progress for this user")
-)
+var ErrDownloadAlreadyInProgress = errors.New("download already in progress for this user")
 
 type DownloadTracker struct {
 	cache *cache_utils.CacheUtil[string]

backend/internal/features/backups/backups/dto.go

@@ -1,29 +0,0 @@
-package backups
-
-import (
-	backups_core "databasus-backend/internal/features/backups/backups/core"
-	"databasus-backend/internal/features/backups/backups/encryption"
-	"io"
-)
-
-type GetBackupsRequest struct {
-	DatabaseID string `form:"database_id" binding:"required"`
-	Limit      int    `form:"limit"`
-	Offset     int    `form:"offset"`
-}
-
-type GetBackupsResponse struct {
-	Backups []*backups_core.Backup `json:"backups"`
-	Total   int64                  `json:"total"`
-	Limit   int                    `json:"limit"`
-	Offset  int                    `json:"offset"`
-}
-
-type DecryptionReaderCloser struct {
-	*encryption.DecryptionReader
-	BaseReader io.ReadCloser
-}
-
-func (r *DecryptionReaderCloser) Close() error {
-	return r.BaseReader.Close()
-}

backend/internal/features/backups/backups/dto/dto.go

@@ -0,0 +1,79 @@
+package backups_dto
+
+import (
+	"io"
+	"time"
+
+	"github.com/google/uuid"
+
+	backups_core "databasus-backend/internal/features/backups/backups/core"
+	"databasus-backend/internal/features/backups/backups/encryption"
+)
+
+type GetBackupsRequest struct {
+	DatabaseID string `form:"database_id" binding:"required"`
+	Limit      int    `form:"limit"`
+	Offset     int    `form:"offset"`
+}
+
+type GetBackupsResponse struct {
+	Backups []*backups_core.Backup `json:"backups"`
+	Total   int64                  `json:"total"`
+	Limit   int                    `json:"limit"`
+	Offset  int                    `json:"offset"`
+}
+
+type DecryptionReaderCloser struct {
+	*encryption.DecryptionReader
+	BaseReader io.ReadCloser
+}
+
+func (r *DecryptionReaderCloser) Close() error {
+	return r.BaseReader.Close()
+}
+
+type MakeBackupRequest struct {
+	DatabaseID uuid.UUID `json:"database_id" binding:"required"`
+}
+
+type GetNextFullBackupTimeResponse struct {
+	NextFullBackupTime *time.Time `json:"nextFullBackupTime"`
+}
+
+type ReportErrorRequest struct {
+	Error string `json:"error" binding:"required"`
+}
+
+type UploadGapResponse struct {
+	Error               string `json:"error"`
+	ExpectedSegmentName string `json:"expectedSegmentName"`
+	ReceivedSegmentName string `json:"receivedSegmentName"`
+}
+
+type RestorePlanFullBackup struct {
+	BackupID                  uuid.UUID `json:"id"`
+	FullBackupWalStartSegment string    `json:"fullBackupWalStartSegment"`
+	FullBackupWalStopSegment  string    `json:"fullBackupWalStopSegment"`
+	PgVersion                 string    `json:"pgVersion"`
+	CreatedAt                 time.Time `json:"createdAt"`
+	SizeBytes                 int64     `json:"sizeBytes"`
+}
+
+type RestorePlanWalSegment struct {
+	BackupID    uuid.UUID `json:"backupId"`
+	SegmentName string    `json:"segmentName"`
+	SizeBytes   int64     `json:"sizeBytes"`
+}
+
+type GetRestorePlanErrorResponse struct {
+	Error                 string `json:"error"`
+	Message               string `json:"message"`
+	LastContiguousSegment string `json:"lastContiguousSegment,omitempty"`
+}
+
+type GetRestorePlanResponse struct {
+	FullBackup             RestorePlanFullBackup   `json:"fullBackup"`
+	WalSegments            []RestorePlanWalSegment `json:"walSegments"`
+	TotalSizeBytes         int64                   `json:"totalSizeBytes"`
+	LatestAvailableSegment string                  `json:"latestAvailableSegment"`
+}

backend/internal/features/backups/backups/encryption/decrypting_reader.go

@@ -4,6 +4,7 @@ import (
 	"crypto/aes"
 	"crypto/cipher"
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
 
@@ -69,7 +70,7 @@ func NewDecryptionReader(
 func (r *DecryptionReader) Read(p []byte) (n int, err error) {
 	for len(r.buffer) < len(p) && !r.eof {
 		if err := r.readAndDecryptChunk(); err != nil {
-			if err == io.EOF {
+			if errors.Is(err, io.EOF) {
 				r.eof = true
 				break
 			}

backend/internal/features/backups/backups/encryption/setup.go

@@ -0,0 +1,45 @@
+package encryption
+
+import (
+	"encoding/base64"
+	"fmt"
+	"io"
+
+	"github.com/google/uuid"
+)
+
+// EncryptionSetup holds the result of setting up encryption for a backup stream.
+type EncryptionSetup struct {
+	Writer      *EncryptionWriter
+	SaltBase64  string
+	NonceBase64 string
+}
+
+// SetupEncryptionWriter generates salt/nonce, creates an EncryptionWriter, and
+// returns the base64-encoded salt and nonce for storage on the backup record.
+func SetupEncryptionWriter(
+	baseWriter io.Writer,
+	masterKey string,
+	backupID uuid.UUID,
+) (*EncryptionSetup, error) {
+	salt, err := GenerateSalt()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate salt: %w", err)
+	}
+
+	nonce, err := GenerateNonce()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate nonce: %w", err)
+	}
+
+	encWriter, err := NewEncryptionWriter(baseWriter, masterKey, backupID, salt, nonce)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create encryption writer: %w", err)
+	}
+
+	return &EncryptionSetup{
+		Writer:      encWriter,
+		SaltBase64:  base64.StdEncoding.EncodeToString(salt),
+		NonceBase64: base64.StdEncoding.EncodeToString(nonce),
+	}, nil
+}

backend/internal/features/backups/backups/services/di.go

@@ -1,4 +1,4 @@
-package backups
+package backups_services
 
 import (
 	"sync"
@@ -20,14 +20,12 @@ import (
 	"databasus-backend/internal/util/logger"
 )
 
-var backupRepository = &backups_core.BackupRepository{}
-
 var taskCancelManager = task_cancellation.GetTaskCancelManager()
 
 var backupService = &BackupService{
 	databases.GetDatabaseService(),
 	storages.GetStorageService(),
-	backupRepository,
+	backups_core.GetBackupRepository(),
 	notifiers.GetNotifierService(),
 	notifiers.GetNotifierService(),
 	backups_config.GetBackupConfigService(),
@@ -44,16 +42,21 @@ var backupService = &BackupService{
 	backuping.GetBackupCleaner(),
 }
 
-var backupController = &BackupController{
-	backupService: backupService,
-}
-
 func GetBackupService() *BackupService {
 	return backupService
 }
 
-func GetBackupController() *BackupController {
-	return backupController
+var walService = &PostgreWalBackupService{
+	backups_config.GetBackupConfigService(),
+	backups_core.GetBackupRepository(),
+	encryption.GetFieldEncryptor(),
+	encryption_secrets.GetSecretKeyService(),
+	logger.GetLogger(),
+	backupService,
+}
+
+func GetWalService() *PostgreWalBackupService {
+	return walService
 }
 
 var (

backend/internal/features/backups/backups/services/postgres_wal_service.go

@@ -0,0 +1,613 @@
+package backups_services
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log/slog"
+	"time"
+
+	"github.com/google/uuid"
+
+	backups_core "databasus-backend/internal/features/backups/backups/core"
+	backups_dto "databasus-backend/internal/features/backups/backups/dto"
+	backup_encryption "databasus-backend/internal/features/backups/backups/encryption"
+	backups_config "databasus-backend/internal/features/backups/config"
+	"databasus-backend/internal/features/databases"
+	"databasus-backend/internal/features/databases/databases/postgresql"
+	encryption_secrets "databasus-backend/internal/features/encryption/secrets"
+	util_encryption "databasus-backend/internal/util/encryption"
+	util_wal "databasus-backend/internal/util/wal"
+)
+
+// PostgreWalBackupService handles WAL segment and basebackup uploads from the databasus-cli agent.
+type PostgreWalBackupService struct {
+	backupConfigService *backups_config.BackupConfigService
+	backupRepository    *backups_core.BackupRepository
+	fieldEncryptor      util_encryption.FieldEncryptor
+	secretKeyService    *encryption_secrets.SecretKeyService
+	logger              *slog.Logger
+	backupService       *BackupService
+}
+
+// UploadWal accepts a streaming WAL segment or basebackup upload from the agent.
+// For WAL segments it validates the WAL chain before accepting. Returns an UploadGapResponse
+// (409) when the chain is broken so the agent knows to trigger a full basebackup.
+func (s *PostgreWalBackupService) UploadWal(
+	ctx context.Context,
+	database *databases.Database,
+	uploadType backups_core.PgWalUploadType,
+	walSegmentName string,
+	fullBackupWalStartSegment string,
+	fullBackupWalStopSegment string,
+	walSegmentSizeBytes int64,
+	body io.Reader,
+) (*backups_dto.UploadGapResponse, error) {
+	if err := s.validateWalBackupType(database); err != nil {
+		return nil, err
+	}
+
+	if uploadType == backups_core.PgWalUploadTypeBasebackup {
+		if fullBackupWalStartSegment == "" || fullBackupWalStopSegment == "" {
+			return nil, fmt.Errorf(
+				"fullBackupWalStartSegment and fullBackupWalStopSegment are required for basebackup uploads",
+			)
+		}
+	}
+
+	backupConfig, err := s.backupConfigService.GetBackupConfigByDbId(database.ID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get backup config: %w", err)
+	}
+
+	if backupConfig.Storage == nil {
+		return nil, fmt.Errorf("no storage configured for database %s", database.ID)
+	}
+
+	if uploadType == backups_core.PgWalUploadTypeWal {
+		// Idempotency: check before chain validation so a successful re-upload is
+		// not misidentified as a gap.
+		existing, err := s.backupRepository.FindWalSegmentByName(database.ID, walSegmentName)
+		if err != nil {
+			return nil, fmt.Errorf("failed to check for duplicate WAL segment: %w", err)
+		}
+
+		if existing != nil {
+			return nil, nil
+		}
+
+		gapResp, err := s.validateWalChain(database.ID, walSegmentName, walSegmentSizeBytes)
+		if err != nil {
+			return nil, err
+		}
+
+		if gapResp != nil {
+			return gapResp, nil
+		}
+	}
+
+	backup := s.createBackupRecord(
+		database.ID,
+		backupConfig.Storage.ID,
+		uploadType,
+		database.Name,
+		walSegmentName,
+		fullBackupWalStartSegment,
+		fullBackupWalStopSegment,
+		backupConfig.Encryption,
+	)
+
+	if err := s.backupRepository.Save(backup); err != nil {
+		return nil, fmt.Errorf("failed to create backup record: %w", err)
+	}
+
+	sizeBytes, streamErr := s.streamToStorage(ctx, backup, backupConfig, body)
+	if streamErr != nil {
+		errMsg := streamErr.Error()
+		s.markFailed(backup, errMsg)
+
+		return nil, fmt.Errorf("upload failed: %w", streamErr)
+	}
+
+	s.markCompleted(backup, sizeBytes)
+
+	return nil, nil
+}
+
+func (s *PostgreWalBackupService) GetRestorePlan(
+	database *databases.Database,
+	backupID *uuid.UUID,
+) (*backups_dto.GetRestorePlanResponse, *backups_dto.GetRestorePlanErrorResponse, error) {
+	if err := s.validateWalBackupType(database); err != nil {
+		return nil, nil, err
+	}
+
+	fullBackup, err := s.resolveFullBackup(database.ID, backupID)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if fullBackup == nil {
+		msg := "no full backups available for this database"
+		if backupID != nil {
+			msg = fmt.Sprintf("full backup %s not found or not completed", backupID)
+		}
+
+		return nil, &backups_dto.GetRestorePlanErrorResponse{
+			Error:   "no_backups",
+			Message: msg,
+		}, nil
+	}
+
+	startSegment := ""
+	if fullBackup.PgFullBackupWalStartSegmentName != nil {
+		startSegment = *fullBackup.PgFullBackupWalStartSegmentName
+	}
+
+	walSegments, err := s.backupRepository.FindCompletedWalSegmentsAfter(database.ID, startSegment)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to query WAL segments: %w", err)
+	}
+
+	chainErr := s.validateRestoreWalChain(fullBackup, walSegments)
+	if chainErr != nil {
+		return nil, chainErr, nil
+	}
+
+	fullBackupSizeBytes := int64(fullBackup.BackupSizeMb * 1024 * 1024)
+
+	pgVersion := ""
+	if fullBackup.PgVersion != nil {
+		pgVersion = *fullBackup.PgVersion
+	}
+
+	stopSegment := ""
+	if fullBackup.PgFullBackupWalStopSegmentName != nil {
+		stopSegment = *fullBackup.PgFullBackupWalStopSegmentName
+	}
+
+	response := &backups_dto.GetRestorePlanResponse{
+		FullBackup: backups_dto.RestorePlanFullBackup{
+			BackupID:                  fullBackup.ID,
+			FullBackupWalStartSegment: startSegment,
+			FullBackupWalStopSegment:  stopSegment,
+			PgVersion:                 pgVersion,
+			CreatedAt:                 fullBackup.CreatedAt,
+			SizeBytes:                 fullBackupSizeBytes,
+		},
+		TotalSizeBytes: fullBackupSizeBytes,
+	}
+
+	for _, seg := range walSegments {
+		segName := ""
+		if seg.PgWalSegmentName != nil {
+			segName = *seg.PgWalSegmentName
+		}
+
+		segSizeBytes := int64(seg.BackupSizeMb * 1024 * 1024)
+
+		response.WalSegments = append(response.WalSegments, backups_dto.RestorePlanWalSegment{
+			BackupID:    seg.ID,
+			SegmentName: segName,
+			SizeBytes:   segSizeBytes,
+		})
+
+		response.TotalSizeBytes += segSizeBytes
+		response.LatestAvailableSegment = segName
+	}
+
+	return response, nil, nil
+}
+
+// DownloadBackupFile returns a reader for a backup file belonging to the given database.
+// Decryption is handled transparently if the backup is encrypted.
+func (s *PostgreWalBackupService) DownloadBackupFile(
+	database *databases.Database,
+	backupID uuid.UUID,
+) (io.ReadCloser, error) {
+	if err := s.validateWalBackupType(database); err != nil {
+		return nil, err
+	}
+
+	backup, err := s.backupRepository.FindByID(backupID)
+	if err != nil {
+		return nil, fmt.Errorf("backup not found: %w", err)
+	}
+
+	if backup.DatabaseID != database.ID {
+		return nil, fmt.Errorf("backup does not belong to this database")
+	}
+
+	if backup.Status != backups_core.BackupStatusCompleted {
+		return nil, fmt.Errorf("backup is not completed")
+	}
+
+	return s.backupService.GetBackupReader(backupID)
+}
+
+func (s *PostgreWalBackupService) GetNextFullBackupTime(
+	database *databases.Database,
+) (*backups_dto.GetNextFullBackupTimeResponse, error) {
+	if err := s.validateWalBackupType(database); err != nil {
+		return nil, err
+	}
+
+	backupConfig, err := s.backupConfigService.GetBackupConfigByDbId(database.ID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get backup config: %w", err)
+	}
+
+	if backupConfig.BackupInterval == nil {
+		return nil, fmt.Errorf("no backup interval configured for database %s", database.ID)
+	}
+
+	lastFullBackup, err := s.backupRepository.FindLastCompletedFullWalBackupByDatabaseID(
+		database.ID,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query last full backup: %w", err)
+	}
+
+	var lastBackupTime *time.Time
+	if lastFullBackup != nil {
+		lastBackupTime = &lastFullBackup.CreatedAt
+	}
+
+	now := time.Now().UTC()
+	nextTime := backupConfig.BackupInterval.NextTriggerTime(now, lastBackupTime)
+
+	return &backups_dto.GetNextFullBackupTimeResponse{
+		NextFullBackupTime: nextTime,
+	}, nil
+}
+
+// ReportError creates a FAILED backup record with the agent's error message.
+func (s *PostgreWalBackupService) ReportError(
+	database *databases.Database,
+	errorMsg string,
+) error {
+	if err := s.validateWalBackupType(database); err != nil {
+		return err
+	}
+
+	backupConfig, err := s.backupConfigService.GetBackupConfigByDbId(database.ID)
+	if err != nil {
+		return fmt.Errorf("failed to get backup config: %w", err)
+	}
+
+	if backupConfig.Storage == nil {
+		return fmt.Errorf("no storage configured for database %s", database.ID)
+	}
+
+	now := time.Now().UTC()
+	backup := &backups_core.Backup{
+		ID:          uuid.New(),
+		DatabaseID:  database.ID,
+		StorageID:   backupConfig.Storage.ID,
+		Status:      backups_core.BackupStatusFailed,
+		FailMessage: &errorMsg,
+		Encryption:  backupConfig.Encryption,
+		CreatedAt:   now,
+	}
+
+	backup.GenerateFilename(database.Name)
+
+	if err := s.backupRepository.Save(backup); err != nil {
+		return fmt.Errorf("failed to save error backup record: %w", err)
+	}
+
+	return nil
+}
+
+func (s *PostgreWalBackupService) validateWalChain(
+	databaseID uuid.UUID,
+	incomingSegment string,
+	walSegmentSizeBytes int64,
+) (*backups_dto.UploadGapResponse, error) {
+	fullBackup, err := s.backupRepository.FindLastCompletedFullWalBackupByDatabaseID(databaseID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query full backup: %w", err)
+	}
+
+	// No full backup exists yet: cannot accept WAL segments without a chain anchor.
+	if fullBackup == nil || fullBackup.PgFullBackupWalStopSegmentName == nil {
+		return &backups_dto.UploadGapResponse{
+			Error:               "no_full_backup",
+			ExpectedSegmentName: "",
+			ReceivedSegmentName: incomingSegment,
+		}, nil
+	}
+
+	stopSegment := *fullBackup.PgFullBackupWalStopSegmentName
+
+	lastWal, err := s.backupRepository.FindLastWalSegmentAfter(databaseID, stopSegment)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query last WAL segment: %w", err)
+	}
+
+	walCalculator := util_wal.NewWalCalculator(walSegmentSizeBytes)
+
+	var chainTail string
+	if lastWal != nil && lastWal.PgWalSegmentName != nil {
+		chainTail = *lastWal.PgWalSegmentName
+	} else {
+		chainTail = stopSegment
+	}
+
+	expectedNext, err := walCalculator.NextSegment(chainTail)
+	if err != nil {
+		return nil, fmt.Errorf("WAL arithmetic failed for %q: %w", chainTail, err)
+	}
+
+	if incomingSegment != expectedNext {
+		return &backups_dto.UploadGapResponse{
+			Error:               "gap_detected",
+			ExpectedSegmentName: expectedNext,
+			ReceivedSegmentName: incomingSegment,
+		}, nil
+	}
+
+	return nil, nil
+}
+
+func (s *PostgreWalBackupService) createBackupRecord(
+	databaseID uuid.UUID,
+	storageID uuid.UUID,
+	uploadType backups_core.PgWalUploadType,
+	dbName string,
+	walSegmentName string,
+	fullBackupWalStartSegment string,
+	fullBackupWalStopSegment string,
+	encryption backups_config.BackupEncryption,
+) *backups_core.Backup {
+	now := time.Now().UTC()
+
+	backup := &backups_core.Backup{
+		ID:         uuid.New(),
+		DatabaseID: databaseID,
+		StorageID:  storageID,
+		Status:     backups_core.BackupStatusInProgress,
+		Encryption: encryption,
+		CreatedAt:  now,
+	}
+
+	backup.GenerateFilename(dbName)
+
+	if uploadType == backups_core.PgWalUploadTypeBasebackup {
+		walBackupType := backups_core.PgWalBackupTypeFullBackup
+		backup.PgWalBackupType = &walBackupType
+
+		if fullBackupWalStartSegment != "" {
+			backup.PgFullBackupWalStartSegmentName = &fullBackupWalStartSegment
+		}
+
+		if fullBackupWalStopSegment != "" {
+			backup.PgFullBackupWalStopSegmentName = &fullBackupWalStopSegment
+		}
+	} else {
+		walBackupType := backups_core.PgWalBackupTypeWalSegment
+		backup.PgWalBackupType = &walBackupType
+		backup.PgWalSegmentName = &walSegmentName
+	}
+
+	return backup
+}
+
+func (s *PostgreWalBackupService) streamToStorage(
+	ctx context.Context,
+	backup *backups_core.Backup,
+	backupConfig *backups_config.BackupConfig,
+	body io.Reader,
+) (int64, error) {
+	if backupConfig.Encryption == backups_config.BackupEncryptionEncrypted {
+		return s.streamEncrypted(ctx, backup, backupConfig, body, backup.FileName)
+	}
+
+	return s.streamDirect(ctx, backupConfig, body, backup.FileName)
+}
+
+func (s *PostgreWalBackupService) streamDirect(
+	ctx context.Context,
+	backupConfig *backups_config.BackupConfig,
+	body io.Reader,
+	fileName string,
+) (int64, error) {
+	cr := &countingReader{r: body}
+
+	if err := backupConfig.Storage.SaveFile(ctx, s.fieldEncryptor, s.logger, fileName, cr); err != nil {
+		return 0, err
+	}
+
+	return cr.n, nil
+}
+
+func (s *PostgreWalBackupService) streamEncrypted(
+	ctx context.Context,
+	backup *backups_core.Backup,
+	backupConfig *backups_config.BackupConfig,
+	body io.Reader,
+	fileName string,
+) (int64, error) {
+	masterKey, err := s.secretKeyService.GetSecretKey()
+	if err != nil {
+		return 0, fmt.Errorf("failed to get master encryption key: %w", err)
+	}
+
+	pipeReader, pipeWriter := io.Pipe()
+
+	encryptionSetup, err := backup_encryption.SetupEncryptionWriter(
+		pipeWriter,
+		masterKey,
+		backup.ID,
+	)
+	if err != nil {
+		_ = pipeWriter.Close()
+		return 0, err
+	}
+
+	copyErrCh := make(chan error, 1)
+	go func() {
+		_, copyErr := io.Copy(encryptionSetup.Writer, body)
+		if copyErr != nil {
+			_ = encryptionSetup.Writer.Close()
+			_ = pipeWriter.CloseWithError(copyErr)
+			copyErrCh <- copyErr
+			return
+		}
+
+		if closeErr := encryptionSetup.Writer.Close(); closeErr != nil {
+			_ = pipeWriter.CloseWithError(closeErr)
+			copyErrCh <- closeErr
+			return
+		}
+
+		copyErrCh <- pipeWriter.Close()
+	}()
+
+	cr := &countingReader{r: pipeReader}
+	saveErr := backupConfig.Storage.SaveFile(ctx, s.fieldEncryptor, s.logger, fileName, cr)
+	copyErr := <-copyErrCh
+
+	if copyErr != nil {
+		return 0, copyErr
+	}
+
+	if saveErr != nil {
+		return 0, saveErr
+	}
+
+	backup.EncryptionSalt = &encryptionSetup.SaltBase64
+	backup.EncryptionIV = &encryptionSetup.NonceBase64
+
+	return cr.n, nil
+}
+
+func (s *PostgreWalBackupService) markCompleted(backup *backups_core.Backup, sizeBytes int64) {
+	backup.Status = backups_core.BackupStatusCompleted
+	backup.BackupSizeMb = float64(sizeBytes) / (1024 * 1024)
+
+	if err := s.backupRepository.Save(backup); err != nil {
+		s.logger.Error(
+			"failed to mark WAL backup as completed",
+			"backupId",
+			backup.ID,
+			"error",
+			err,
+		)
+	}
+}
+
+func (s *PostgreWalBackupService) markFailed(backup *backups_core.Backup, errMsg string) {
+	backup.Status = backups_core.BackupStatusFailed
+	backup.FailMessage = &errMsg
+
+	if err := s.backupRepository.Save(backup); err != nil {
+		s.logger.Error("failed to mark WAL backup as failed", "backupId", backup.ID, "error", err)
+	}
+}
+
+func (s *PostgreWalBackupService) resolveFullBackup(
+	databaseID uuid.UUID,
+	backupID *uuid.UUID,
+) (*backups_core.Backup, error) {
+	if backupID != nil {
+		return s.backupRepository.FindCompletedFullWalBackupByID(databaseID, *backupID)
+	}
+
+	return s.backupRepository.FindLastCompletedFullWalBackupByDatabaseID(databaseID)
+}
+
+func (s *PostgreWalBackupService) validateRestoreWalChain(
+	fullBackup *backups_core.Backup,
+	walSegments []*backups_core.Backup,
+) *backups_dto.GetRestorePlanErrorResponse {
+	if len(walSegments) == 0 {
+		return nil
+	}
+
+	stopSegment := ""
+	if fullBackup.PgFullBackupWalStopSegmentName != nil {
+		stopSegment = *fullBackup.PgFullBackupWalStopSegmentName
+	}
+
+	walCalculator := util_wal.NewWalCalculator(0)
+	expectedNext, err := walCalculator.NextSegment(stopSegment)
+	if err != nil {
+		return nil
+	}
+
+	for _, seg := range walSegments {
+		segName := ""
+		if seg.PgWalSegmentName != nil {
+			segName = *seg.PgWalSegmentName
+		}
+
+		cmp, cmpErr := walCalculator.Compare(segName, stopSegment)
+		if cmpErr != nil {
+			return nil
+		}
+
+		// Skip segments that are <= stopSegment (they are part of the basebackup range)
+		if cmp <= 0 {
+			continue
+		}
+
+		if segName != expectedNext {
+			lastContiguous := stopSegment
+			// Walk back to find the segment before the gap
+			for _, prev := range walSegments {
+				prevName := ""
+				if prev.PgWalSegmentName != nil {
+					prevName = *prev.PgWalSegmentName
+				}
+
+				prevCmp, _ := walCalculator.Compare(prevName, stopSegment)
+				if prevCmp <= 0 {
+					continue
+				}
+
+				if prevName == segName {
+					break
+				}
+
+				lastContiguous = prevName
+			}
+
+			return &backups_dto.GetRestorePlanErrorResponse{
+				Error: "wal_chain_broken",
+				Message: fmt.Sprintf(
+					"WAL chain has a gap after segment %s. Recovery is only possible up to this segment.",
+					lastContiguous,
+				),
+				LastContiguousSegment: lastContiguous,
+			}
+		}
+
+		expectedNext, err = walCalculator.NextSegment(segName)
+		if err != nil {
+			return nil
+		}
+	}
+
+	return nil
+}
+
+func (s *PostgreWalBackupService) validateWalBackupType(database *databases.Database) error {
+	if database.Postgresql == nil ||
+		database.Postgresql.BackupType != postgresql.PostgresBackupTypeWalV1 {
+		return fmt.Errorf("database %s is not configured for WAL backups", database.ID)
+	}
+	return nil
+}
+
+type countingReader struct {
+	r io.Reader
+	n int64
+}
+
+func (cr *countingReader) Read(p []byte) (n int, err error) {
+	n, err = cr.r.Read(p)
+	cr.n += int64(n)
+
+	return n, err
+}

backend/internal/features/backups/backups/services/service.go

@@ -1,4 +1,4 @@
-package backups
+package backups_services
 
 import (
 	"encoding/base64"
@@ -7,10 +7,13 @@ import (
 	"io"
 	"log/slog"
 
+	"github.com/google/uuid"
+
 	audit_logs "databasus-backend/internal/features/audit_logs"
 	"databasus-backend/internal/features/backups/backups/backuping"
 	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backups_download "databasus-backend/internal/features/backups/backups/download"
+	backups_dto "databasus-backend/internal/features/backups/backups/dto"
 	"databasus-backend/internal/features/backups/backups/encryption"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -21,8 +24,7 @@ import (
 	users_models "databasus-backend/internal/features/users/models"
 	workspaces_services "databasus-backend/internal/features/workspaces/services"
 	util_encryption "databasus-backend/internal/util/encryption"
-
-	"github.com/google/uuid"
+	files_utils "databasus-backend/internal/util/files"
 )
 
 type BackupService struct {
@@ -92,7 +94,7 @@ func (s *BackupService) MakeBackupWithAuth(
 		return errors.New("insufficient permissions to create backup for this database")
 	}
 
-	s.backupSchedulerService.StartBackup(databaseID, true)
+	s.backupSchedulerService.StartBackup(database, true)
 
 	s.auditLogService.WriteAuditLog(
 		fmt.Sprintf("Backup manually initiated for database: %s", database.Name),
@@ -107,7 +109,7 @@ func (s *BackupService) GetBackups(
 	user *users_models.User,
 	databaseID uuid.UUID,
 	limit, offset int,
-) (*GetBackupsResponse, error) {
+) (*backups_dto.GetBackupsResponse, error) {
 	database, err := s.databaseService.GetDatabaseByID(databaseID)
 	if err != nil {
 		return nil, err
@@ -142,7 +144,7 @@ func (s *BackupService) GetBackups(
 		return nil, err
 	}
 
-	return &GetBackupsResponse{
+	return &backups_dto.GetBackupsResponse{
 		Backups: backups,
 		Total:   total,
 		Limit:   limit,
@@ -181,11 +183,7 @@ func (s *BackupService) DeleteBackup(
 	}
 
 	s.auditLogService.WriteAuditLog(
-		fmt.Sprintf(
-			"Backup deleted for database: %s (ID: %s)",
-			database.Name,
-			backupID.String(),
-		),
+		fmt.Sprintf("Backup deleted for database: %s", database.Name),
 		&user.ID,
 		database.WorkspaceID,
 	)
@@ -232,11 +230,7 @@ func (s *BackupService) CancelBackup(
 	}
 
 	s.auditLogService.WriteAuditLog(
-		fmt.Sprintf(
-			"Backup cancelled for database: %s (ID: %s)",
-			database.Name,
-			backupID.String(),
-		),
+		fmt.Sprintf("Backup cancelled for database: %s", database.Name),
 		&user.ID,
 		database.WorkspaceID,
 	)
@@ -276,16 +270,12 @@ func (s *BackupService) GetBackupFile(
 	}
 
 	s.auditLogService.WriteAuditLog(
-		fmt.Sprintf(
-			"Backup file downloaded for database: %s (ID: %s)",
-			database.Name,
-			backupID.String(),
-		),
+		fmt.Sprintf("Backup file downloaded for database: %s", database.Name),
 		&user.ID,
 		database.WorkspaceID,
 	)
 
-	reader, err := s.getBackupReader(backupID)
+	reader, err := s.GetBackupReader(backupID)
 	if err != nil {
 		return nil, nil, nil, err
 	}
@@ -293,39 +283,9 @@ func (s *BackupService) GetBackupFile(
 	return reader, backup, database, nil
 }
 
-func (s *BackupService) deleteDbBackups(databaseID uuid.UUID) error {
-	dbBackupsInProgress, err := s.backupRepository.FindByDatabaseIdAndStatus(
-		databaseID,
-		backups_core.BackupStatusInProgress,
-	)
-	if err != nil {
-		return err
-	}
-
-	if len(dbBackupsInProgress) > 0 {
-		return errors.New("backup is in progress, storage cannot be removed")
-	}
-
-	dbBackups, err := s.backupRepository.FindByDatabaseID(
-		databaseID,
-	)
-	if err != nil {
-		return err
-	}
-
-	for _, dbBackup := range dbBackups {
-		err := s.backupCleaner.DeleteBackup(dbBackup)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// GetBackupReader returns a reader for the backup file
-// If encrypted, wraps with DecryptionReader
-func (s *BackupService) getBackupReader(backupID uuid.UUID) (io.ReadCloser, error) {
+// GetBackupReader returns a reader for the backup file.
+// If encrypted, wraps with DecryptionReader.
+func (s *BackupService) GetBackupReader(backupID uuid.UUID) (io.ReadCloser, error) {
 	backup, err := s.backupRepository.FindByID(backupID)
 	if err != nil {
 		return nil, fmt.Errorf("failed to find backup: %w", err)
@@ -336,7 +296,7 @@ func (s *BackupService) getBackupReader(backupID uuid.UUID) (io.ReadCloser, erro
 		return nil, fmt.Errorf("failed to get storage: %w", err)
 	}
 
-	fileReader, err := storage.GetFile(s.fieldEncryptor, backup.ID)
+	fileReader, err := storage.GetFile(s.fieldEncryptor, backup.FileName)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get backup file: %w", err)
 	}
@@ -405,7 +365,7 @@ func (s *BackupService) getBackupReader(backupID uuid.UUID) (io.ReadCloser, erro
 
 	s.logger.Info("Returning encrypted backup with decryption", "backupId", backupID)
 
-	return &DecryptionReaderCloser{
+	return &backups_dto.DecryptionReaderCloser{
 		DecryptionReader: decryptionReader,
 		BaseReader:       fileReader,
 	}, nil
@@ -476,7 +436,7 @@ func (s *BackupService) GetBackupFileWithoutAuth(
 		return nil, nil, nil, err
 	}
 
-	reader, err := s.getBackupReader(backupID)
+	reader, err := s.GetBackupReader(backupID)
 	if err != nil {
 		return nil, nil, nil, err
 	}
@@ -490,11 +450,7 @@ func (s *BackupService) WriteAuditLogForDownload(
 	database *databases.Database,
 ) {
 	s.auditLogService.WriteAuditLog(
-		fmt.Sprintf(
-			"Backup file downloaded for database: %s (ID: %s)",
-			database.Name,
-			backup.ID.String(),
-		),
+		fmt.Sprintf("Backup file downloaded for database: %s", database.Name),
 		&userID,
 		database.WorkspaceID,
 	)
@@ -516,12 +472,42 @@ func (s *BackupService) UnregisterDownload(userID uuid.UUID) {
 	s.downloadTokenService.UnregisterDownload(userID)
 }
 
+func (s *BackupService) deleteDbBackups(databaseID uuid.UUID) error {
+	dbBackupsInProgress, err := s.backupRepository.FindByDatabaseIdAndStatus(
+		databaseID,
+		backups_core.BackupStatusInProgress,
+	)
+	if err != nil {
+		return err
+	}
+
+	if len(dbBackupsInProgress) > 0 {
+		return errors.New("backup is in progress, storage cannot be removed")
+	}
+
+	dbBackups, err := s.backupRepository.FindByDatabaseID(
+		databaseID,
+	)
+	if err != nil {
+		return err
+	}
+
+	for _, dbBackup := range dbBackups {
+		err := s.backupCleaner.DeleteBackup(dbBackup)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func (s *BackupService) generateBackupFilename(
 	backup *backups_core.Backup,
 	database *databases.Database,
 ) string {
 	timestamp := backup.CreatedAt.Format("2006-01-02_15-04-05")
-	safeName := sanitizeFilename(database.Name)
+	safeName := files_utils.SanitizeFilename(database.Name)
 	extension := s.getBackupExtension(database.Type)
 	return fmt.Sprintf("%s_backup_%s%s", safeName, timestamp, extension)
 }

backend/internal/features/backups/backups/usecases/create_backup_uc.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 
 	common "databasus-backend/internal/features/backups/backups/common"
+	backups_core "databasus-backend/internal/features/backups/backups/core"
 	usecases_mariadb "databasus-backend/internal/features/backups/backups/usecases/mariadb"
 	usecases_mongodb "databasus-backend/internal/features/backups/backups/usecases/mongodb"
 	usecases_mysql "databasus-backend/internal/features/backups/backups/usecases/mysql"
@@ -12,8 +13,6 @@ import (
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
 	"databasus-backend/internal/features/storages"
-
-	"github.com/google/uuid"
 )
 
 type CreateBackupUsecase struct {
@@ -25,7 +24,7 @@ type CreateBackupUsecase struct {
 
 func (uc *CreateBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	database *databases.Database,
 	storage *storages.Storage,
@@ -35,7 +34,7 @@ func (uc *CreateBackupUsecase) Execute(
 	case databases.DatabaseTypePostgres:
 		return uc.CreatePostgresqlBackupUsecase.Execute(
 			ctx,
-			backupID,
+			backup,
 			backupConfig,
 			database,
 			storage,
@@ -45,7 +44,7 @@ func (uc *CreateBackupUsecase) Execute(
 	case databases.DatabaseTypeMysql:
 		return uc.CreateMysqlBackupUsecase.Execute(
 			ctx,
-			backupID,
+			backup,
 			backupConfig,
 			database,
 			storage,
@@ -55,7 +54,7 @@ func (uc *CreateBackupUsecase) Execute(
 	case databases.DatabaseTypeMariadb:
 		return uc.CreateMariadbBackupUsecase.Execute(
 			ctx,
-			backupID,
+			backup,
 			backupConfig,
 			database,
 			storage,
@@ -65,7 +64,7 @@ func (uc *CreateBackupUsecase) Execute(
 	case databases.DatabaseTypeMongodb:
 		return uc.CreateMongodbBackupUsecase.Execute(
 			ctx,
-			backupID,
+			backup,
 			backupConfig,
 			database,
 			storage,

backend/internal/features/backups/backups/usecases/mariadb/create_backup_uc.go

@@ -2,7 +2,6 @@ package usecases_mariadb
 
 import (
 	"context"
-	"encoding/base64"
 	"errors"
 	"fmt"
 	"io"
@@ -19,6 +18,7 @@ import (
 
 	"databasus-backend/internal/config"
 	common "databasus-backend/internal/features/backups/backups/common"
+	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backup_encryption "databasus-backend/internal/features/backups/backups/encryption"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -52,7 +52,7 @@ type writeResult struct {
 
 func (uc *CreateMariadbBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	db *databases.Database,
 	storage *storages.Storage,
@@ -82,7 +82,7 @@ func (uc *CreateMariadbBackupUsecase) Execute(
 
 	return uc.streamToStorage(
 		ctx,
-		backupID,
+		backup,
 		backupConfig,
 		tools.GetMariadbExecutable(
 			tools.MariadbExecutableMariadbDump,
@@ -108,18 +108,24 @@ func (uc *CreateMariadbBackupUsecase) buildMariadbDumpArgs(
 		"--single-transaction",
 		"--routines",
 		"--quick",
+		"--skip-extended-insert",
 		"--verbose",
 	}
 
 	if mdb.HasPrivilege("TRIGGER") {
 		args = append(args, "--triggers")
 	}
-	if mdb.HasPrivilege("EVENT") {
+
+	if mdb.HasPrivilege("EVENT") && !mdb.IsExcludeEvents {
 		args = append(args, "--events")
 	}
 
 	args = append(args, "--compress")
 
+	if !config.GetEnv().IsCloud {
+		args = append(args, "--max-allowed-packet=1G")
+	}
+
 	if mdb.IsHttps {
 		args = append(args, "--ssl")
 		args = append(args, "--skip-ssl-verify-server-cert")
@@ -134,7 +140,7 @@ func (uc *CreateMariadbBackupUsecase) buildMariadbDumpArgs(
 
 func (uc *CreateMariadbBackupUsecase) streamToStorage(
 	parentCtx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	mariadbBin string,
 	args []string,
@@ -185,7 +191,7 @@ func (uc *CreateMariadbBackupUsecase) streamToStorage(
 	storageReader, storageWriter := io.Pipe()
 
 	finalWriter, encryptionWriter, backupMetadata, err := uc.setupBackupEncryption(
-		backupID,
+		backup.ID,
 		backupConfig,
 		storageWriter,
 	)
@@ -202,7 +208,13 @@ func (uc *CreateMariadbBackupUsecase) streamToStorage(
 
 	saveErrCh := make(chan error, 1)
 	go func() {
-		saveErr := storage.SaveFile(ctx, uc.fieldEncryptor, uc.logger, backupID, storageReader)
+		saveErr := storage.SaveFile(
+			ctx,
+			uc.fieldEncryptor,
+			uc.logger,
+			backup.FileName,
+			storageReader,
+		)
 		saveErrCh <- saveErr
 	}()
 
@@ -267,10 +279,10 @@ func (uc *CreateMariadbBackupUsecase) createTempMyCnfFile(
 	password string,
 ) (string, error) {
 	tempFolder := config.GetEnv().TempFolder
-	if err := os.MkdirAll(tempFolder, 0700); err != nil {
+	if err := os.MkdirAll(tempFolder, 0o700); err != nil {
 		return "", fmt.Errorf("failed to ensure temp folder exists: %w", err)
 	}
-	if err := os.Chmod(tempFolder, 0700); err != nil {
+	if err := os.Chmod(tempFolder, 0o700); err != nil {
 		return "", fmt.Errorf("failed to set temp folder permissions: %w", err)
 	}
 
@@ -279,7 +291,7 @@ func (uc *CreateMariadbBackupUsecase) createTempMyCnfFile(
 		return "", fmt.Errorf("failed to create temp directory: %w", err)
 	}
 
-	if err := os.Chmod(tempDir, 0700); err != nil {
+	if err := os.Chmod(tempDir, 0o700); err != nil {
 		_ = os.RemoveAll(tempDir)
 		return "", fmt.Errorf("failed to set temp directory permissions: %w", err)
 	}
@@ -299,7 +311,7 @@ port=%d
 		content += "ssl=false\n"
 	}
 
-	err = os.WriteFile(myCnfFile, []byte(content), 0600)
+	err = os.WriteFile(myCnfFile, []byte(content), 0o600)
 	if err != nil {
 		_ = os.RemoveAll(tempDir)
 		return "", fmt.Errorf("failed to write .my.cnf: %w", err)
@@ -418,7 +430,9 @@ func (uc *CreateMariadbBackupUsecase) setupBackupEncryption(
 	backupConfig *backups_config.BackupConfig,
 	storageWriter io.WriteCloser,
 ) (io.Writer, *backup_encryption.EncryptionWriter, common.BackupMetadata, error) {
-	metadata := common.BackupMetadata{}
+	metadata := common.BackupMetadata{
+		BackupID: backupID,
+	}
 
 	if backupConfig.Encryption != backups_config.BackupEncryptionEncrypted {
 		metadata.Encryption = backups_config.BackupEncryptionNone
@@ -426,40 +440,22 @@ func (uc *CreateMariadbBackupUsecase) setupBackupEncryption(
 		return storageWriter, nil, metadata, nil
 	}
 
-	salt, err := backup_encryption.GenerateSalt()
-	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to generate salt: %w", err)
-	}
-
-	nonce, err := backup_encryption.GenerateNonce()
-	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to generate nonce: %w", err)
-	}
-
 	masterKey, err := uc.secretKeyService.GetSecretKey()
 	if err != nil {
 		return nil, nil, metadata, fmt.Errorf("failed to get master key: %w", err)
 	}
 
-	encWriter, err := backup_encryption.NewEncryptionWriter(
-		storageWriter,
-		masterKey,
-		backupID,
-		salt,
-		nonce,
-	)
+	encSetup, err := backup_encryption.SetupEncryptionWriter(storageWriter, masterKey, backupID)
 	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to create encrypting writer: %w", err)
+		return nil, nil, metadata, err
 	}
 
-	saltBase64 := base64.StdEncoding.EncodeToString(salt)
-	nonceBase64 := base64.StdEncoding.EncodeToString(nonce)
-	metadata.EncryptionSalt = &saltBase64
-	metadata.EncryptionIV = &nonceBase64
+	metadata.EncryptionSalt = &encSetup.SaltBase64
+	metadata.EncryptionIV = &encSetup.NonceBase64
 	metadata.Encryption = backups_config.BackupEncryptionEncrypted
 
 	uc.logger.Info("Encryption enabled for backup", "backupId", backupID)
-	return encWriter, encWriter, metadata, nil
+	return encSetup.Writer, encSetup.Writer, metadata, nil
 }
 
 func (uc *CreateMariadbBackupUsecase) cleanupOnCancellation(
@@ -552,8 +548,8 @@ func (uc *CreateMariadbBackupUsecase) buildMariadbDumpErrorMessage(
 		stderrStr,
 	)
 
-	exitErr, ok := waitErr.(*exec.ExitError)
-	if !ok {
+	var exitErr *exec.ExitError
+	if !errors.As(waitErr, &exitErr) {
 		return errors.New(errorMsg)
 	}
 

backend/internal/features/backups/backups/usecases/mongodb/create_backup_uc.go

@@ -2,7 +2,6 @@ package usecases_mongodb
 
 import (
 	"context"
-	"encoding/base64"
 	"errors"
 	"fmt"
 	"io"
@@ -16,6 +15,7 @@ import (
 
 	"databasus-backend/internal/config"
 	common "databasus-backend/internal/features/backups/backups/common"
+	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backup_encryption "databasus-backend/internal/features/backups/backups/encryption"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -46,7 +46,7 @@ type writeResult struct {
 
 func (uc *CreateMongodbBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	db *databases.Database,
 	storage *storages.Storage,
@@ -76,7 +76,7 @@ func (uc *CreateMongodbBackupUsecase) Execute(
 
 	return uc.streamToStorage(
 		ctx,
-		backupID,
+		backup,
 		backupConfig,
 		tools.GetMongodbExecutable(
 			tools.MongodbExecutableMongodump,
@@ -114,7 +114,7 @@ func (uc *CreateMongodbBackupUsecase) buildMongodumpArgs(
 
 func (uc *CreateMongodbBackupUsecase) streamToStorage(
 	parentCtx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	mongodumpBin string,
 	args []string,
@@ -163,7 +163,7 @@ func (uc *CreateMongodbBackupUsecase) streamToStorage(
 	storageReader, storageWriter := io.Pipe()
 
 	finalWriter, encryptionWriter, backupMetadata, err := uc.setupBackupEncryption(
-		backupID,
+		backup.ID,
 		backupConfig,
 		storageWriter,
 	)
@@ -175,7 +175,13 @@ func (uc *CreateMongodbBackupUsecase) streamToStorage(
 
 	saveErrCh := make(chan error, 1)
 	go func() {
-		saveErr := storage.SaveFile(ctx, uc.fieldEncryptor, uc.logger, backupID, storageReader)
+		saveErr := storage.SaveFile(
+			ctx,
+			uc.fieldEncryptor,
+			uc.logger,
+			backup.FileName,
+			storageReader,
+		)
 		saveErrCh <- saveErr
 	}()
 
@@ -262,6 +268,7 @@ func (uc *CreateMongodbBackupUsecase) setupBackupEncryption(
 	storageWriter io.WriteCloser,
 ) (io.Writer, *backup_encryption.EncryptionWriter, common.BackupMetadata, error) {
 	backupMetadata := common.BackupMetadata{
+		BackupID:   backupID,
 		Encryption: backups_config.BackupEncryptionNone,
 	}
 
@@ -269,40 +276,21 @@ func (uc *CreateMongodbBackupUsecase) setupBackupEncryption(
 		return storageWriter, nil, backupMetadata, nil
 	}
 
-	salt, err := backup_encryption.GenerateSalt()
-	if err != nil {
-		return nil, nil, backupMetadata, fmt.Errorf("failed to generate salt: %w", err)
-	}
-
-	nonce, err := backup_encryption.GenerateNonce()
-	if err != nil {
-		return nil, nil, backupMetadata, fmt.Errorf("failed to generate nonce: %w", err)
-	}
-
 	masterKey, err := uc.secretKeyService.GetSecretKey()
 	if err != nil {
 		return nil, nil, backupMetadata, fmt.Errorf("failed to get master key: %w", err)
 	}
 
-	encryptionWriter, err := backup_encryption.NewEncryptionWriter(
-		storageWriter,
-		masterKey,
-		backupID,
-		salt,
-		nonce,
-	)
+	encSetup, err := backup_encryption.SetupEncryptionWriter(storageWriter, masterKey, backupID)
 	if err != nil {
-		return nil, nil, backupMetadata, fmt.Errorf("failed to create encryption writer: %w", err)
+		return nil, nil, backupMetadata, err
 	}
 
-	saltBase64 := base64.StdEncoding.EncodeToString(salt)
-	nonceBase64 := base64.StdEncoding.EncodeToString(nonce)
-
 	backupMetadata.Encryption = backups_config.BackupEncryptionEncrypted
-	backupMetadata.EncryptionSalt = &saltBase64
-	backupMetadata.EncryptionIV = &nonceBase64
+	backupMetadata.EncryptionSalt = &encSetup.SaltBase64
+	backupMetadata.EncryptionIV = &encSetup.NonceBase64
 
-	return encryptionWriter, encryptionWriter, backupMetadata, nil
+	return encSetup.Writer, encSetup.Writer, backupMetadata, nil
 }
 
 func (uc *CreateMongodbBackupUsecase) copyWithShutdownCheck(

backend/internal/features/backups/backups/usecases/mysql/create_backup_uc.go

@@ -2,7 +2,6 @@ package usecases_mysql
 
 import (
 	"context"
-	"encoding/base64"
 	"errors"
 	"fmt"
 	"io"
@@ -19,6 +18,7 @@ import (
 
 	"databasus-backend/internal/config"
 	common "databasus-backend/internal/features/backups/backups/common"
+	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backup_encryption "databasus-backend/internal/features/backups/backups/encryption"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -52,7 +52,7 @@ type writeResult struct {
 
 func (uc *CreateMysqlBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	db *databases.Database,
 	storage *storages.Storage,
@@ -82,7 +82,7 @@ func (uc *CreateMysqlBackupUsecase) Execute(
 
 	return uc.streamToStorage(
 		ctx,
-		backupID,
+		backup,
 		backupConfig,
 		tools.GetMysqlExecutable(
 			my.Version,
@@ -107,6 +107,7 @@ func (uc *CreateMysqlBackupUsecase) buildMysqldumpArgs(my *mysqltypes.MysqlDatab
 		"--routines",
 		"--set-gtid-purged=OFF",
 		"--quick",
+		"--skip-extended-insert",
 		"--verbose",
 	}
 
@@ -117,7 +118,11 @@ func (uc *CreateMysqlBackupUsecase) buildMysqldumpArgs(my *mysqltypes.MysqlDatab
 		args = append(args, "--events")
 	}
 
-	args = append(args, uc.getNetworkCompressionArgs(my.Version)...)
+	args = append(args, uc.getNetworkCompressionArgs(my)...)
+
+	if !config.GetEnv().IsCloud {
+		args = append(args, "--max-allowed-packet=1G")
+	}
 
 	if my.IsHttps {
 		args = append(args, "--ssl-mode=REQUIRED")
@@ -130,15 +135,21 @@ func (uc *CreateMysqlBackupUsecase) buildMysqldumpArgs(my *mysqltypes.MysqlDatab
 	return args
 }
 
-func (uc *CreateMysqlBackupUsecase) getNetworkCompressionArgs(version tools.MysqlVersion) []string {
+func (uc *CreateMysqlBackupUsecase) getNetworkCompressionArgs(
+	my *mysqltypes.MysqlDatabase,
+) []string {
 	const zstdCompressionLevel = 5
 
-	switch version {
+	switch my.Version {
 	case tools.MysqlVersion80, tools.MysqlVersion84, tools.MysqlVersion9:
-		return []string{
-			"--compression-algorithms=zstd",
-			fmt.Sprintf("--zstd-compression-level=%d", zstdCompressionLevel),
+		if my.IsZstdSupported {
+			return []string{
+				"--compression-algorithms=zstd",
+				fmt.Sprintf("--zstd-compression-level=%d", zstdCompressionLevel),
+			}
 		}
+
+		return []string{"--compress"}
 	case tools.MysqlVersion57:
 		return []string{"--compress"}
 	default:
@@ -148,7 +159,7 @@ func (uc *CreateMysqlBackupUsecase) getNetworkCompressionArgs(version tools.Mysq
 
 func (uc *CreateMysqlBackupUsecase) streamToStorage(
 	parentCtx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	mysqlBin string,
 	args []string,
@@ -199,7 +210,7 @@ func (uc *CreateMysqlBackupUsecase) streamToStorage(
 	storageReader, storageWriter := io.Pipe()
 
 	finalWriter, encryptionWriter, backupMetadata, err := uc.setupBackupEncryption(
-		backupID,
+		backup.ID,
 		backupConfig,
 		storageWriter,
 	)
@@ -216,7 +227,13 @@ func (uc *CreateMysqlBackupUsecase) streamToStorage(
 
 	saveErrCh := make(chan error, 1)
 	go func() {
-		saveErr := storage.SaveFile(ctx, uc.fieldEncryptor, uc.logger, backupID, storageReader)
+		saveErr := storage.SaveFile(
+			ctx,
+			uc.fieldEncryptor,
+			uc.logger,
+			backup.FileName,
+			storageReader,
+		)
 		saveErrCh <- saveErr
 	}()
 
@@ -281,10 +298,10 @@ func (uc *CreateMysqlBackupUsecase) createTempMyCnfFile(
 	password string,
 ) (string, error) {
 	tempFolder := config.GetEnv().TempFolder
-	if err := os.MkdirAll(tempFolder, 0700); err != nil {
+	if err := os.MkdirAll(tempFolder, 0o700); err != nil {
 		return "", fmt.Errorf("failed to ensure temp folder exists: %w", err)
 	}
-	if err := os.Chmod(tempFolder, 0700); err != nil {
+	if err := os.Chmod(tempFolder, 0o700); err != nil {
 		return "", fmt.Errorf("failed to set temp folder permissions: %w", err)
 	}
 
@@ -293,7 +310,7 @@ func (uc *CreateMysqlBackupUsecase) createTempMyCnfFile(
 		return "", fmt.Errorf("failed to create temp directory: %w", err)
 	}
 
-	if err := os.Chmod(tempDir, 0700); err != nil {
+	if err := os.Chmod(tempDir, 0o700); err != nil {
 		_ = os.RemoveAll(tempDir)
 		return "", fmt.Errorf("failed to set temp directory permissions: %w", err)
 	}
@@ -311,7 +328,7 @@ port=%d
 		content += "ssl-mode=REQUIRED\n"
 	}
 
-	err = os.WriteFile(myCnfFile, []byte(content), 0600)
+	err = os.WriteFile(myCnfFile, []byte(content), 0o600)
 	if err != nil {
 		_ = os.RemoveAll(tempDir)
 		return "", fmt.Errorf("failed to write .my.cnf: %w", err)
@@ -430,7 +447,9 @@ func (uc *CreateMysqlBackupUsecase) setupBackupEncryption(
 	backupConfig *backups_config.BackupConfig,
 	storageWriter io.WriteCloser,
 ) (io.Writer, *backup_encryption.EncryptionWriter, common.BackupMetadata, error) {
-	metadata := common.BackupMetadata{}
+	metadata := common.BackupMetadata{
+		BackupID: backupID,
+	}
 
 	if backupConfig.Encryption != backups_config.BackupEncryptionEncrypted {
 		metadata.Encryption = backups_config.BackupEncryptionNone
@@ -438,40 +457,22 @@ func (uc *CreateMysqlBackupUsecase) setupBackupEncryption(
 		return storageWriter, nil, metadata, nil
 	}
 
-	salt, err := backup_encryption.GenerateSalt()
-	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to generate salt: %w", err)
-	}
-
-	nonce, err := backup_encryption.GenerateNonce()
-	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to generate nonce: %w", err)
-	}
-
 	masterKey, err := uc.secretKeyService.GetSecretKey()
 	if err != nil {
 		return nil, nil, metadata, fmt.Errorf("failed to get master key: %w", err)
 	}
 
-	encWriter, err := backup_encryption.NewEncryptionWriter(
-		storageWriter,
-		masterKey,
-		backupID,
-		salt,
-		nonce,
-	)
+	encSetup, err := backup_encryption.SetupEncryptionWriter(storageWriter, masterKey, backupID)
 	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to create encrypting writer: %w", err)
+		return nil, nil, metadata, err
 	}
 
-	saltBase64 := base64.StdEncoding.EncodeToString(salt)
-	nonceBase64 := base64.StdEncoding.EncodeToString(nonce)
-	metadata.EncryptionSalt = &saltBase64
-	metadata.EncryptionIV = &nonceBase64
+	metadata.EncryptionSalt = &encSetup.SaltBase64
+	metadata.EncryptionIV = &encSetup.NonceBase64
 	metadata.Encryption = backups_config.BackupEncryptionEncrypted
 
 	uc.logger.Info("Encryption enabled for backup", "backupId", backupID)
-	return encWriter, encWriter, metadata, nil
+	return encSetup.Writer, encSetup.Writer, metadata, nil
 }
 
 func (uc *CreateMysqlBackupUsecase) cleanupOnCancellation(
@@ -564,8 +565,8 @@ func (uc *CreateMysqlBackupUsecase) buildMysqldumpErrorMessage(
 		stderrStr,
 	)
 
-	exitErr, ok := waitErr.(*exec.ExitError)
-	if !ok {
+	var exitErr *exec.ExitError
+	if !errors.As(waitErr, &exitErr) {
 		return errors.New(errorMsg)
 	}
 
@@ -594,6 +595,15 @@ func (uc *CreateMysqlBackupUsecase) handleConnectionErrors(stderrStr string) err
 		)
 	}
 
+	if containsIgnoreCase(stderrStr, "compression algorithm") ||
+		containsIgnoreCase(stderrStr, "2066") {
+		return fmt.Errorf(
+			"MySQL connection failed due to unsupported compression algorithm. "+
+				"Try re-saving the database connection to re-detect compression support. stderr: %s",
+			stderrStr,
+		)
+	}
+
 	if containsIgnoreCase(stderrStr, "unknown database") {
 		return fmt.Errorf(
 			"MySQL database does not exist. stderr: %s",

backend/internal/features/backups/backups/usecases/postgresql/create_backup_uc.go

@@ -2,7 +2,6 @@ package usecases_postgresql
 
 import (
 	"context"
-	"encoding/base64"
 	"errors"
 	"fmt"
 	"io"
@@ -14,8 +13,11 @@ import (
 	"strings"
 	"time"
 
+	"github.com/google/uuid"
+
 	"databasus-backend/internal/config"
 	common "databasus-backend/internal/features/backups/backups/common"
+	backups_core "databasus-backend/internal/features/backups/backups/core"
 	backup_encryption "databasus-backend/internal/features/backups/backups/encryption"
 	backups_config "databasus-backend/internal/features/backups/config"
 	"databasus-backend/internal/features/databases"
@@ -24,8 +26,6 @@ import (
 	"databasus-backend/internal/features/storages"
 	"databasus-backend/internal/util/encryption"
 	"databasus-backend/internal/util/tools"
-
-	"github.com/google/uuid"
 )
 
 const (
@@ -53,7 +53,7 @@ type writeResult struct {
 
 func (uc *CreatePostgresqlBackupUsecase) Execute(
 	ctx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	db *databases.Database,
 	storage *storages.Storage,
@@ -88,7 +88,7 @@ func (uc *CreatePostgresqlBackupUsecase) Execute(
 
 	return uc.streamToStorage(
 		ctx,
-		backupID,
+		backup,
 		backupConfig,
 		tools.GetPostgresqlExecutable(
 			pg.Version,
@@ -107,7 +107,7 @@ func (uc *CreatePostgresqlBackupUsecase) Execute(
 // streamToStorage streams pg_dump output directly to storage
 func (uc *CreatePostgresqlBackupUsecase) streamToStorage(
 	parentCtx context.Context,
-	backupID uuid.UUID,
+	backup *backups_core.Backup,
 	backupConfig *backups_config.BackupConfig,
 	pgBin string,
 	args []string,
@@ -166,7 +166,7 @@ func (uc *CreatePostgresqlBackupUsecase) streamToStorage(
 	storageReader, storageWriter := io.Pipe()
 
 	finalWriter, encryptionWriter, backupMetadata, err := uc.setupBackupEncryption(
-		backupID,
+		backup.ID,
 		backupConfig,
 		storageWriter,
 	)
@@ -181,7 +181,13 @@ func (uc *CreatePostgresqlBackupUsecase) streamToStorage(
 	// Start streaming into storage in its own goroutine
 	saveErrCh := make(chan error, 1)
 	go func() {
-		saveErr := storage.SaveFile(ctx, uc.fieldEncryptor, uc.logger, backupID, storageReader)
+		saveErr := storage.SaveFile(
+			ctx,
+			uc.fieldEncryptor,
+			uc.logger,
+			backup.FileName,
+			storageReader,
+		)
 		saveErrCh <- saveErr
 	}()
 
@@ -475,7 +481,9 @@ func (uc *CreatePostgresqlBackupUsecase) setupBackupEncryption(
 	backupConfig *backups_config.BackupConfig,
 	storageWriter io.WriteCloser,
 ) (io.Writer, *backup_encryption.EncryptionWriter, common.BackupMetadata, error) {
-	metadata := common.BackupMetadata{}
+	metadata := common.BackupMetadata{
+		BackupID: backupID,
+	}
 
 	if backupConfig.Encryption != backups_config.BackupEncryptionEncrypted {
 		metadata.Encryption = backups_config.BackupEncryptionNone
@@ -483,40 +491,22 @@ func (uc *CreatePostgresqlBackupUsecase) setupBackupEncryption(
 		return storageWriter, nil, metadata, nil
 	}
 
-	salt, err := backup_encryption.GenerateSalt()
-	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to generate salt: %w", err)
-	}
-
-	nonce, err := backup_encryption.GenerateNonce()
-	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to generate nonce: %w", err)
-	}
-
 	masterKey, err := uc.secretKeyService.GetSecretKey()
 	if err != nil {
 		return nil, nil, metadata, fmt.Errorf("failed to get master key: %w", err)
 	}
 
-	encWriter, err := backup_encryption.NewEncryptionWriter(
-		storageWriter,
-		masterKey,
-		backupID,
-		salt,
-		nonce,
-	)
+	encSetup, err := backup_encryption.SetupEncryptionWriter(storageWriter, masterKey, backupID)
 	if err != nil {
-		return nil, nil, metadata, fmt.Errorf("failed to create encrypting writer: %w", err)
+		return nil, nil, metadata, err
 	}
 
-	saltBase64 := base64.StdEncoding.EncodeToString(salt)
-	nonceBase64 := base64.StdEncoding.EncodeToString(nonce)
-	metadata.EncryptionSalt = &saltBase64
-	metadata.EncryptionIV = &nonceBase64
+	metadata.EncryptionSalt = &encSetup.SaltBase64
+	metadata.EncryptionIV = &encSetup.NonceBase64
 	metadata.Encryption = backups_config.BackupEncryptionEncrypted
 
 	uc.logger.Info("Encryption enabled for backup", "backupId", backupID)
-	return encWriter, encWriter, metadata, nil
+	return encSetup.Writer, encSetup.Writer, metadata, nil
 }
 
 func (uc *CreatePostgresqlBackupUsecase) cleanupOnCancellation(
@@ -605,8 +595,8 @@ func (uc *CreatePostgresqlBackupUsecase) buildPgDumpErrorMessage(
 	stderrStr := string(stderrOutput)
 	errorMsg := fmt.Sprintf("%s failed: %v – stderr: %s", filepath.Base(pgBin), waitErr, stderrStr)
 
-	exitErr, ok := waitErr.(*exec.ExitError)
-	if !ok {
+	var exitErr *exec.ExitError
+	if !errors.As(waitErr, &exitErr) {
 		return errors.New(errorMsg)
 	}
 
@@ -758,10 +748,10 @@ func (uc *CreatePostgresqlBackupUsecase) createTempPgpassFile(
 	)
 
 	tempFolder := config.GetEnv().TempFolder
-	if err := os.MkdirAll(tempFolder, 0700); err != nil {
+	if err := os.MkdirAll(tempFolder, 0o700); err != nil {
 		return "", fmt.Errorf("failed to ensure temp folder exists: %w", err)
 	}
-	if err := os.Chmod(tempFolder, 0700); err != nil {
+	if err := os.Chmod(tempFolder, 0o700); err != nil {
 		return "", fmt.Errorf("failed to set temp folder permissions: %w", err)
 	}
 
@@ -770,13 +760,13 @@ func (uc *CreatePostgresqlBackupUsecase) createTempPgpassFile(
 		return "", fmt.Errorf("failed to create temporary directory: %w", err)
 	}
 
-	if err := os.Chmod(tempDir, 0700); err != nil {
+	if err := os.Chmod(tempDir, 0o700); err != nil {
 		_ = os.RemoveAll(tempDir)
 		return "", fmt.Errorf("failed to set temporary directory permissions: %w", err)
 	}
 
 	pgpassFile := filepath.Join(tempDir, ".pgpass")
-	err = os.WriteFile(pgpassFile, []byte(pgpassContent), 0600)
+	err = os.WriteFile(pgpassFile, []byte(pgpassContent), 0o600)
 	if err != nil {
 		_ = os.RemoveAll(tempDir)
 		return "", fmt.Errorf("failed to write temporary .pgpass file: %w", err)

backend/internal/features/backups/config/controller.go

@@ -4,10 +4,10 @@ import (
 	"errors"
 	"net/http"
 
-	users_middleware "databasus-backend/internal/features/users/middleware"
-
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
+
+	users_middleware "databasus-backend/internal/features/users/middleware"
 )
 
 type BackupConfigController struct {

backend/internal/features/backups/config/controller_test.go

@@ -118,9 +118,10 @@ func Test_SaveBackupConfig_PermissionsEnforced(t *testing.T) {
 
 			timeOfDay := "04:00"
 			request := BackupConfig{
-				DatabaseID:       database.ID,
-				IsBackupsEnabled: true,
-				StorePeriod:      period.PeriodWeek,
+				DatabaseID:          database.ID,
+				IsBackupsEnabled:    true,
+				RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+				RetentionTimePeriod: period.PeriodWeek,
 				BackupInterval: &intervals.Interval{
 					Interval:  intervals.IntervalDaily,
 					TimeOfDay: &timeOfDay,
@@ -146,7 +147,7 @@ func Test_SaveBackupConfig_PermissionsEnforced(t *testing.T) {
 			if tt.expectSuccess {
 				assert.Equal(t, database.ID, response.DatabaseID)
 				assert.True(t, response.IsBackupsEnabled)
-				assert.Equal(t, period.PeriodWeek, response.StorePeriod)
+				assert.Equal(t, period.PeriodWeek, response.RetentionTimePeriod)
 			} else {
 				assert.Contains(t, string(testResp.Body), "insufficient permissions")
 			}
@@ -170,9 +171,10 @@ func Test_SaveBackupConfig_WhenUserIsNotWorkspaceMember_ReturnsForbidden(t *test
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -337,7 +339,7 @@ func Test_GetBackupConfigByDbID_ReturnsDefaultConfigForNewDatabase(t *testing.T)
 
 	assert.Equal(t, database.ID, response.DatabaseID)
 	assert.False(t, response.IsBackupsEnabled)
-	assert.Equal(t, plan.MaxStoragePeriod, response.StorePeriod)
+	assert.Equal(t, plan.MaxStoragePeriod, response.RetentionTimePeriod)
 	assert.Equal(t, plan.MaxBackupSizeMB, response.MaxBackupSizeMB)
 	assert.Equal(t, plan.MaxBackupsTotalSizeMB, response.MaxBackupsTotalSizeMB)
 	assert.True(t, response.IsRetryIfFailed)
@@ -411,9 +413,10 @@ func Test_SaveBackupConfig_WhenPlanLimitsAreAdjusted_ValidationEnforced(t *testi
 	// Test 1: Try to save backup config with exceeded backup size limit
 	timeOfDay := "04:00"
 	backupConfigExceededSize := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -440,9 +443,10 @@ func Test_SaveBackupConfig_WhenPlanLimitsAreAdjusted_ValidationEnforced(t *testi
 
 	// Test 2: Try to save backup config with exceeded total size limit
 	backupConfigExceededTotal := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -469,9 +473,10 @@ func Test_SaveBackupConfig_WhenPlanLimitsAreAdjusted_ValidationEnforced(t *testi
 
 	// Test 3: Try to save backup config with exceeded storage period limit
 	backupConfigExceededPeriod := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodYear, // Exceeds limit of Month
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodYear, // Exceeds limit of Month
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -498,9 +503,10 @@ func Test_SaveBackupConfig_WhenPlanLimitsAreAdjusted_ValidationEnforced(t *testi
 
 	// Test 4: Save backup config within all limits - should succeed
 	backupConfigValid := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek, // Within Month limit
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek, // Within Month limit
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -529,7 +535,7 @@ func Test_SaveBackupConfig_WhenPlanLimitsAreAdjusted_ValidationEnforced(t *testi
 	assert.Equal(t, database.ID, responseValid.DatabaseID)
 	assert.Equal(t, int64(80), responseValid.MaxBackupSizeMB)
 	assert.Equal(t, int64(800), responseValid.MaxBackupsTotalSizeMB)
-	assert.Equal(t, period.PeriodWeek, responseValid.StorePeriod)
+	assert.Equal(t, period.PeriodWeek, responseValid.RetentionTimePeriod)
 }
 
 func Test_IsStorageUsing_PermissionsEnforced(t *testing.T) {
@@ -618,9 +624,10 @@ func Test_SaveBackupConfig_WithEncryptionNone_ConfigSaved(t *testing.T) {
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -662,9 +669,10 @@ func Test_SaveBackupConfig_WithEncryptionEncrypted_ConfigSaved(t *testing.T) {
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -959,9 +967,10 @@ func Test_TransferDatabase_ToNewStorage_DatabaseTransferd(t *testing.T) {
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1045,9 +1054,10 @@ func Test_TransferDatabase_WithExistingStorage_DatabaseAndStorageTransferd(t *te
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1142,9 +1152,10 @@ func Test_TransferDatabase_StorageHasOtherDBs_CannotTransfer(t *testing.T) {
 
 	timeOfDay := "04:00"
 	backupConfigRequest1 := BackupConfig{
-		DatabaseID:       database1.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database1.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1168,9 +1179,10 @@ func Test_TransferDatabase_StorageHasOtherDBs_CannotTransfer(t *testing.T) {
 	)
 
 	backupConfigRequest2 := BackupConfig{
-		DatabaseID:       database2.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database2.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1244,9 +1256,10 @@ func Test_TransferDatabase_WithNotifiers_NotifiersTransferred(t *testing.T) {
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1364,9 +1377,10 @@ func Test_TransferDatabase_NotifierHasOtherDBs_NotifierSkipped(t *testing.T) {
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database1.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database1.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1486,9 +1500,10 @@ func Test_TransferDatabase_WithMultipleNotifiers_OnlyExclusiveOnesTransferred(t
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database1.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database1.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1585,9 +1600,10 @@ func Test_TransferDatabase_WithTargetNotifiers_NotifiersAssigned(t *testing.T) {
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1665,9 +1681,10 @@ func Test_TransferDatabase_TargetNotifierFromDifferentWorkspace_ReturnsBadReques
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1730,9 +1747,10 @@ func Test_TransferDatabase_TargetStorageFromDifferentWorkspace_ReturnsBadRequest
 
 	timeOfDay := "04:00"
 	backupConfigRequest := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1789,9 +1807,10 @@ func Test_SaveBackupConfig_WithSystemStorage_CanBeUsedByAnyDatabase(t *testing.T
 
 	timeOfDay := "04:00"
 	backupConfigWithRegularStorage := BackupConfig{
-		DatabaseID:       databaseA.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          databaseA.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -1840,9 +1859,10 @@ func Test_SaveBackupConfig_WithSystemStorage_CanBeUsedByAnyDatabase(t *testing.T
 	assert.True(t, savedSystemStorage.IsSystem)
 
 	backupConfigWithSystemStorage := BackupConfig{
-		DatabaseID:       databaseA.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          databaseA.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,

backend/internal/features/backups/config/di.go

@@ -12,16 +12,19 @@ import (
 	"databasus-backend/internal/util/logger"
 )
 
-var backupConfigRepository = &BackupConfigRepository{}
-var backupConfigService = &BackupConfigService{
-	backupConfigRepository,
-	databases.GetDatabaseService(),
-	storages.GetStorageService(),
-	notifiers.GetNotifierService(),
-	workspaces_services.GetWorkspaceService(),
-	plans.GetDatabasePlanService(),
-	nil,
-}
+var (
+	backupConfigRepository = &BackupConfigRepository{}
+	backupConfigService    = &BackupConfigService{
+		backupConfigRepository,
+		databases.GetDatabaseService(),
+		storages.GetStorageService(),
+		notifiers.GetNotifierService(),
+		workspaces_services.GetWorkspaceService(),
+		plans.GetDatabasePlanService(),
+		nil,
+	}
+)
+
 var backupConfigController = &BackupConfigController{
 	backupConfigService,
 }

backend/internal/features/backups/config/enums.go

@@ -13,3 +13,11 @@ const (
 	BackupEncryptionNone      BackupEncryption = "NONE"
 	BackupEncryptionEncrypted BackupEncryption = "ENCRYPTED"
 )
+
+type RetentionPolicyType string
+
+const (
+	RetentionPolicyTypeTimePeriod RetentionPolicyType = "TIME_PERIOD"
+	RetentionPolicyTypeCount      RetentionPolicyType = "COUNT"
+	RetentionPolicyTypeGFS        RetentionPolicyType = "GFS"
+)

backend/internal/features/backups/config/model.go

@@ -1,16 +1,17 @@
 package backups_config
 
 import (
-	"databasus-backend/internal/config"
-	"databasus-backend/internal/features/intervals"
-	plans "databasus-backend/internal/features/plan"
-	"databasus-backend/internal/features/storages"
-	"databasus-backend/internal/util/period"
 	"errors"
 	"strings"
 
 	"github.com/google/uuid"
 	"gorm.io/gorm"
+
+	"databasus-backend/internal/config"
+	"databasus-backend/internal/features/intervals"
+	plans "databasus-backend/internal/features/plan"
+	"databasus-backend/internal/features/storages"
+	"databasus-backend/internal/util/period"
 )
 
 type BackupConfig struct {
@@ -18,7 +19,15 @@ type BackupConfig struct {
 
 	IsBackupsEnabled bool `json:"isBackupsEnabled" gorm:"column:is_backups_enabled;type:boolean;not null"`
 
-	StorePeriod period.Period `json:"storePeriod" gorm:"column:store_period;type:text;not null"`
+	RetentionPolicyType RetentionPolicyType `json:"retentionPolicyType" gorm:"column:retention_policy_type;type:text;not null;default:'TIME_PERIOD'"`
+	RetentionTimePeriod period.TimePeriod   `json:"retentionTimePeriod" gorm:"column:retention_time_period;type:text;not null;default:''"`
+
+	RetentionCount     int `json:"retentionCount"     gorm:"column:retention_count;type:int;not null;default:0"`
+	RetentionGfsHours  int `json:"retentionGfsHours"  gorm:"column:retention_gfs_hours;type:int;not null;default:0"`
+	RetentionGfsDays   int `json:"retentionGfsDays"   gorm:"column:retention_gfs_days;type:int;not null;default:0"`
+	RetentionGfsWeeks  int `json:"retentionGfsWeeks"  gorm:"column:retention_gfs_weeks;type:int;not null;default:0"`
+	RetentionGfsMonths int `json:"retentionGfsMonths" gorm:"column:retention_gfs_months;type:int;not null;default:0"`
+	RetentionGfsYears  int `json:"retentionGfsYears"  gorm:"column:retention_gfs_years;type:int;not null;default:0"`
 
 	BackupIntervalID uuid.UUID           `json:"backupIntervalId"         gorm:"column:backup_interval_id;type:uuid;not null"`
 	BackupInterval   *intervals.Interval `json:"backupInterval,omitempty" gorm:"foreignKey:BackupIntervalID"`
@@ -35,7 +44,7 @@ type BackupConfig struct {
 	Encryption BackupEncryption `json:"encryption" gorm:"column:encryption;type:text;not null;default:'NONE'"`
 
 	// MaxBackupSizeMB limits individual backup size. 0 = unlimited.
-	MaxBackupSizeMB int64 `json:"maxBackupSizeMb"       gorm:"column:max_backup_size_mb;type:int;not null"`
+	MaxBackupSizeMB int64 `json:"maxBackupSizeMb" gorm:"column:max_backup_size_mb;type:int;not null"`
 	// MaxBackupsTotalSizeMB limits total size of all backups. 0 = unlimited.
 	MaxBackupsTotalSizeMB int64 `json:"maxBackupsTotalSizeMb" gorm:"column:max_backups_total_size_mb;type:int;not null"`
 }
@@ -78,13 +87,12 @@ func (b *BackupConfig) AfterFind(tx *gorm.DB) error {
 }
 
 func (b *BackupConfig) Validate(plan *plans.DatabasePlan) error {
-	// Backup interval is required either as ID or as object
 	if b.BackupIntervalID == uuid.Nil && b.BackupInterval == nil {
 		return errors.New("backup interval is required")
 	}
 
-	if b.StorePeriod == "" {
-		return errors.New("store period is required")
+	if err := b.validateRetentionPolicy(plan); err != nil {
+		return err
 	}
 
 	if b.IsRetryIfFailed && b.MaxFailedTriesCount <= 0 {
@@ -110,22 +118,12 @@ func (b *BackupConfig) Validate(plan *plans.DatabasePlan) error {
 		return errors.New("max backups total size must be non-negative")
 	}
 
-	// Validate against plan limits
-	// Check storage period limit
-	if plan.MaxStoragePeriod != period.PeriodForever {
-		if b.StorePeriod.CompareTo(plan.MaxStoragePeriod) > 0 {
-			return errors.New("storage period exceeds plan limit")
-		}
-	}
-
-	// Check max backup size limit (0 in plan means unlimited)
 	if plan.MaxBackupSizeMB > 0 {
 		if b.MaxBackupSizeMB == 0 || b.MaxBackupSizeMB > plan.MaxBackupSizeMB {
 			return errors.New("max backup size exceeds plan limit")
 		}
 	}
 
-	// Check max total backups size limit (0 in plan means unlimited)
 	if plan.MaxBackupsTotalSizeMB > 0 {
 		if b.MaxBackupsTotalSizeMB == 0 ||
 			b.MaxBackupsTotalSizeMB > plan.MaxBackupsTotalSizeMB {
@@ -140,7 +138,14 @@ func (b *BackupConfig) Copy(newDatabaseID uuid.UUID) *BackupConfig {
 	return &BackupConfig{
 		DatabaseID:            newDatabaseID,
 		IsBackupsEnabled:      b.IsBackupsEnabled,
-		StorePeriod:           b.StorePeriod,
+		RetentionPolicyType:   b.RetentionPolicyType,
+		RetentionTimePeriod:   b.RetentionTimePeriod,
+		RetentionCount:        b.RetentionCount,
+		RetentionGfsHours:     b.RetentionGfsHours,
+		RetentionGfsDays:      b.RetentionGfsDays,
+		RetentionGfsWeeks:     b.RetentionGfsWeeks,
+		RetentionGfsMonths:    b.RetentionGfsMonths,
+		RetentionGfsYears:     b.RetentionGfsYears,
 		BackupIntervalID:      uuid.Nil,
 		BackupInterval:        b.BackupInterval.Copy(),
 		StorageID:             b.StorageID,
@@ -152,3 +157,34 @@ func (b *BackupConfig) Copy(newDatabaseID uuid.UUID) *BackupConfig {
 		MaxBackupsTotalSizeMB: b.MaxBackupsTotalSizeMB,
 	}
 }
+
+func (b *BackupConfig) validateRetentionPolicy(plan *plans.DatabasePlan) error {
+	switch b.RetentionPolicyType {
+	case RetentionPolicyTypeTimePeriod, "":
+		if b.RetentionTimePeriod == "" {
+			return errors.New("retention time period is required")
+		}
+
+		if plan.MaxStoragePeriod != period.PeriodForever {
+			if b.RetentionTimePeriod.CompareTo(plan.MaxStoragePeriod) > 0 {
+				return errors.New("storage period exceeds plan limit")
+			}
+		}
+
+	case RetentionPolicyTypeCount:
+		if b.RetentionCount <= 0 {
+			return errors.New("retention count must be greater than 0")
+		}
+
+	case RetentionPolicyTypeGFS:
+		if b.RetentionGfsHours <= 0 && b.RetentionGfsDays <= 0 && b.RetentionGfsWeeks <= 0 &&
+			b.RetentionGfsMonths <= 0 && b.RetentionGfsYears <= 0 {
+			return errors.New("at least one GFS retention field must be greater than 0")
+		}
+
+	default:
+		return errors.New("invalid retention policy type")
+	}
+
+	return nil
+}

backend/internal/features/backups/config/model_test.go

@@ -3,17 +3,17 @@ package backups_config
 import (
 	"testing"
 
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+
 	"databasus-backend/internal/features/intervals"
 	plans "databasus-backend/internal/features/plan"
 	"databasus-backend/internal/util/period"
-
-	"github.com/google/uuid"
-	"github.com/stretchr/testify/assert"
 )
 
-func Test_Validate_WhenStoragePeriodIsWeekAndPlanAllowsMonth_ValidationPasses(t *testing.T) {
+func Test_Validate_WhenRetentionTimePeriodIsWeekAndPlanAllowsMonth_ValidationPasses(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodWeek
+	config.RetentionTimePeriod = period.PeriodWeek
 
 	plan := createUnlimitedPlan()
 	plan.MaxStoragePeriod = period.PeriodMonth
@@ -22,9 +22,9 @@ func Test_Validate_WhenStoragePeriodIsWeekAndPlanAllowsMonth_ValidationPasses(t
 	assert.NoError(t, err)
 }
 
-func Test_Validate_WhenStoragePeriodIsYearAndPlanAllowsMonth_ValidationFails(t *testing.T) {
+func Test_Validate_WhenRetentionTimePeriodIsYearAndPlanAllowsMonth_ValidationFails(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodYear
+	config.RetentionTimePeriod = period.PeriodYear
 
 	plan := createUnlimitedPlan()
 	plan.MaxStoragePeriod = period.PeriodMonth
@@ -33,9 +33,11 @@ func Test_Validate_WhenStoragePeriodIsYearAndPlanAllowsMonth_ValidationFails(t *
 	assert.EqualError(t, err, "storage period exceeds plan limit")
 }
 
-func Test_Validate_WhenStoragePeriodIsForeverAndPlanAllowsForever_ValidationPasses(t *testing.T) {
+func Test_Validate_WhenRetentionTimePeriodIsForeverAndPlanAllowsForever_ValidationPasses(
+	t *testing.T,
+) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodForever
+	config.RetentionTimePeriod = period.PeriodForever
 
 	plan := createUnlimitedPlan()
 	plan.MaxStoragePeriod = period.PeriodForever
@@ -44,9 +46,9 @@ func Test_Validate_WhenStoragePeriodIsForeverAndPlanAllowsForever_ValidationPass
 	assert.NoError(t, err)
 }
 
-func Test_Validate_WhenStoragePeriodIsForeverAndPlanAllowsYear_ValidationFails(t *testing.T) {
+func Test_Validate_WhenRetentionTimePeriodIsForeverAndPlanAllowsYear_ValidationFails(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodForever
+	config.RetentionTimePeriod = period.PeriodForever
 
 	plan := createUnlimitedPlan()
 	plan.MaxStoragePeriod = period.PeriodYear
@@ -55,9 +57,9 @@ func Test_Validate_WhenStoragePeriodIsForeverAndPlanAllowsYear_ValidationFails(t
 	assert.EqualError(t, err, "storage period exceeds plan limit")
 }
 
-func Test_Validate_WhenStoragePeriodEqualsExactPlanLimit_ValidationPasses(t *testing.T) {
+func Test_Validate_WhenRetentionTimePeriodEqualsExactPlanLimit_ValidationPasses(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodMonth
+	config.RetentionTimePeriod = period.PeriodMonth
 
 	plan := createUnlimitedPlan()
 	plan.MaxStoragePeriod = period.PeriodMonth
@@ -178,7 +180,7 @@ func Test_Validate_WhenTotalSizeEqualsExactPlanLimit_ValidationPasses(t *testing
 
 func Test_Validate_WhenAllLimitsAreUnlimitedInPlan_AnyConfigurationPasses(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodForever
+	config.RetentionTimePeriod = period.PeriodForever
 	config.MaxBackupSizeMB = 0
 	config.MaxBackupsTotalSizeMB = 0
 
@@ -190,7 +192,7 @@ func Test_Validate_WhenAllLimitsAreUnlimitedInPlan_AnyConfigurationPasses(t *tes
 
 func Test_Validate_WhenMultipleLimitsExceeded_ValidationFailsWithFirstError(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = period.PeriodYear
+	config.RetentionTimePeriod = period.PeriodYear
 	config.MaxBackupSizeMB = 500
 	config.MaxBackupsTotalSizeMB = 5000
 
@@ -249,14 +251,14 @@ func Test_Validate_WhenEncryptionIsInvalid_ValidationFailsRegardlessOfPlan(t *te
 	assert.EqualError(t, err, "encryption must be NONE or ENCRYPTED")
 }
 
-func Test_Validate_WhenStoragePeriodIsEmpty_ValidationFails(t *testing.T) {
+func Test_Validate_WhenRetentionTimePeriodIsEmpty_ValidationFails(t *testing.T) {
 	config := createValidBackupConfig()
-	config.StorePeriod = ""
+	config.RetentionTimePeriod = ""
 
 	plan := createUnlimitedPlan()
 
 	err := config.Validate(plan)
-	assert.EqualError(t, err, "store period is required")
+	assert.EqualError(t, err, "retention time period is required")
 }
 
 func Test_Validate_WhenMaxBackupSizeIsNegative_ValidationFails(t *testing.T) {
@@ -282,8 +284,8 @@ func Test_Validate_WhenMaxTotalSizeIsNegative_ValidationFails(t *testing.T) {
 func Test_Validate_WhenPlanLimitsAreAtBoundary_ValidationWorks(t *testing.T) {
 	tests := []struct {
 		name          string
-		configPeriod  period.Period
-		planPeriod    period.Period
+		configPeriod  period.TimePeriod
+		planPeriod    period.TimePeriod
 		configSize    int64
 		planSize      int64
 		configTotal   int64
@@ -345,7 +347,7 @@ func Test_Validate_WhenPlanLimitsAreAtBoundary_ValidationWorks(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			config := createValidBackupConfig()
-			config.StorePeriod = tt.configPeriod
+			config.RetentionTimePeriod = tt.configPeriod
 			config.MaxBackupSizeMB = tt.configSize
 			config.MaxBackupsTotalSizeMB = tt.configTotal
 
@@ -364,12 +366,96 @@ func Test_Validate_WhenPlanLimitsAreAtBoundary_ValidationWorks(t *testing.T) {
 	}
 }
 
+func Test_Validate_WhenPolicyTypeIsCount_RequiresPositiveCount(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = RetentionPolicyTypeCount
+	config.RetentionCount = 0
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.EqualError(t, err, "retention count must be greater than 0")
+}
+
+func Test_Validate_WhenPolicyTypeIsCount_WithPositiveCount_ValidationPasses(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = RetentionPolicyTypeCount
+	config.RetentionCount = 10
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.NoError(t, err)
+}
+
+func Test_Validate_WhenPolicyTypeIsGFS_RequiresAtLeastOneField(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = RetentionPolicyTypeGFS
+	config.RetentionGfsDays = 0
+	config.RetentionGfsWeeks = 0
+	config.RetentionGfsMonths = 0
+	config.RetentionGfsYears = 0
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.EqualError(t, err, "at least one GFS retention field must be greater than 0")
+}
+
+func Test_Validate_WhenPolicyTypeIsGFS_WithOnlyHours_ValidationPasses(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = RetentionPolicyTypeGFS
+	config.RetentionGfsHours = 24
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.NoError(t, err)
+}
+
+func Test_Validate_WhenPolicyTypeIsGFS_WithOnlyDays_ValidationPasses(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = RetentionPolicyTypeGFS
+	config.RetentionGfsDays = 7
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.NoError(t, err)
+}
+
+func Test_Validate_WhenPolicyTypeIsGFS_WithAllFields_ValidationPasses(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = RetentionPolicyTypeGFS
+	config.RetentionGfsHours = 24
+	config.RetentionGfsDays = 7
+	config.RetentionGfsWeeks = 4
+	config.RetentionGfsMonths = 12
+	config.RetentionGfsYears = 3
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.NoError(t, err)
+}
+
+func Test_Validate_WhenPolicyTypeIsInvalid_ValidationFails(t *testing.T) {
+	config := createValidBackupConfig()
+	config.RetentionPolicyType = "INVALID"
+
+	plan := createUnlimitedPlan()
+
+	err := config.Validate(plan)
+	assert.EqualError(t, err, "invalid retention policy type")
+}
+
 func createValidBackupConfig() *BackupConfig {
 	intervalID := uuid.New()
 	return &BackupConfig{
 		DatabaseID:            uuid.New(),
 		IsBackupsEnabled:      true,
-		StorePeriod:           period.PeriodMonth,
+		RetentionPolicyType:   RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   period.PeriodMonth,
 		BackupIntervalID:      intervalID,
 		BackupInterval:        &intervals.Interval{ID: intervalID},
 		SendNotificationsOn:   []BackupNotificationType{},

backend/internal/features/backups/config/repository.go

@@ -1,11 +1,12 @@
 package backups_config
 
 import (
-	"databasus-backend/internal/storage"
 	"errors"
 
 	"github.com/google/uuid"
 	"gorm.io/gorm"
+
+	"databasus-backend/internal/storage"
 )
 
 type BackupConfigRepository struct{}
@@ -47,7 +48,6 @@ func (r *BackupConfigRepository) Save(
 
 		return nil
 	})
-
 	if err != nil {
 		return nil, err
 	}

backend/internal/features/backups/config/service.go

@@ -3,6 +3,8 @@ package backups_config
 import (
 	"errors"
 
+	"github.com/google/uuid"
+
 	"databasus-backend/internal/features/databases"
 	"databasus-backend/internal/features/intervals"
 	"databasus-backend/internal/features/notifiers"
@@ -10,8 +12,6 @@ import (
 	"databasus-backend/internal/features/storages"
 	users_models "databasus-backend/internal/features/users/models"
 	workspaces_services "databasus-backend/internal/features/workspaces/services"
-
-	"github.com/google/uuid"
 )
 
 type BackupConfigService struct {
@@ -214,38 +214,6 @@ func (s *BackupConfigService) CreateDisabledBackupConfig(databaseID uuid.UUID) e
 	return s.initializeDefaultConfig(databaseID)
 }
 
-func (s *BackupConfigService) initializeDefaultConfig(
-	databaseID uuid.UUID,
-) error {
-	plan, err := s.databasePlanService.GetDatabasePlan(databaseID)
-	if err != nil {
-		return err
-	}
-
-	timeOfDay := "04:00"
-
-	_, err = s.backupConfigRepository.Save(&BackupConfig{
-		DatabaseID:            databaseID,
-		IsBackupsEnabled:      false,
-		StorePeriod:           plan.MaxStoragePeriod,
-		MaxBackupSizeMB:       plan.MaxBackupSizeMB,
-		MaxBackupsTotalSizeMB: plan.MaxBackupsTotalSizeMB,
-		BackupInterval: &intervals.Interval{
-			Interval:  intervals.IntervalDaily,
-			TimeOfDay: &timeOfDay,
-		},
-		SendNotificationsOn: []BackupNotificationType{
-			NotificationBackupFailed,
-			NotificationBackupSuccess,
-		},
-		IsRetryIfFailed:     true,
-		MaxFailedTriesCount: 3,
-		Encryption:          BackupEncryptionNone,
-	})
-
-	return err
-}
-
 func (s *BackupConfigService) TransferDatabaseToWorkspace(
 	user *users_models.User,
 	databaseID uuid.UUID,
@@ -289,7 +257,8 @@ func (s *BackupConfigService) TransferDatabaseToWorkspace(
 		s.transferNotifiers(user, database, request.TargetWorkspaceID)
 	}
 
-	if request.IsTransferWithStorage {
+	switch {
+	case request.IsTransferWithStorage:
 		if backupConfig.StorageID == nil {
 			return ErrDatabaseHasNoStorage
 		}
@@ -314,7 +283,7 @@ func (s *BackupConfigService) TransferDatabaseToWorkspace(
 		if err != nil {
 			return err
 		}
-	} else if request.TargetStorageID != nil {
+	case request.TargetStorageID != nil:
 		targetStorage, err := s.storageService.GetStorageByID(*request.TargetStorageID)
 		if err != nil {
 			return err
@@ -331,7 +300,7 @@ func (s *BackupConfigService) TransferDatabaseToWorkspace(
 		if err != nil {
 			return err
 		}
-	} else {
+	default:
 		return ErrTargetStorageNotSpecified
 	}
 
@@ -350,6 +319,39 @@ func (s *BackupConfigService) TransferDatabaseToWorkspace(
 	return nil
 }
 
+func (s *BackupConfigService) initializeDefaultConfig(
+	databaseID uuid.UUID,
+) error {
+	plan, err := s.databasePlanService.GetDatabasePlan(databaseID)
+	if err != nil {
+		return err
+	}
+
+	timeOfDay := "04:00"
+
+	_, err = s.backupConfigRepository.Save(&BackupConfig{
+		DatabaseID:            databaseID,
+		IsBackupsEnabled:      false,
+		RetentionPolicyType:   RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod:   plan.MaxStoragePeriod,
+		MaxBackupSizeMB:       plan.MaxBackupSizeMB,
+		MaxBackupsTotalSizeMB: plan.MaxBackupsTotalSizeMB,
+		BackupInterval: &intervals.Interval{
+			Interval:  intervals.IntervalDaily,
+			TimeOfDay: &timeOfDay,
+		},
+		SendNotificationsOn: []BackupNotificationType{
+			NotificationBackupFailed,
+			NotificationBackupSuccess,
+		},
+		IsRetryIfFailed:     true,
+		MaxFailedTriesCount: 3,
+		Encryption:          BackupEncryptionNone,
+	})
+
+	return err
+}
+
 func (s *BackupConfigService) transferNotifiers(
 	user *users_models.User,
 	database *databases.Database,

backend/internal/features/backups/config/storages_test.go

@@ -35,9 +35,10 @@ func Test_AttachStorageFromSameWorkspace_SuccessfullyAttached(t *testing.T) {
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -87,9 +88,10 @@ func Test_AttachStorageFromDifferentWorkspace_ReturnsForbidden(t *testing.T) {
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -131,9 +133,10 @@ func Test_DeleteStorageWithAttachedDatabases_CannotDelete(t *testing.T) {
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,
@@ -191,9 +194,10 @@ func Test_TransferStorageWithAttachedDatabase_CannotTransfer(t *testing.T) {
 
 	timeOfDay := "04:00"
 	request := BackupConfig{
-		DatabaseID:       database.ID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodWeek,
+		DatabaseID:          database.ID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodWeek,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,

backend/internal/features/backups/config/testing.go

@@ -1,11 +1,11 @@
 package backups_config
 
 import (
+	"github.com/google/uuid"
+
 	"databasus-backend/internal/features/intervals"
 	"databasus-backend/internal/features/storages"
 	"databasus-backend/internal/util/period"
-
-	"github.com/google/uuid"
 )
 
 func EnableBackupsForTestDatabase(
@@ -15,9 +15,10 @@ func EnableBackupsForTestDatabase(
 	timeOfDay := "16:00"
 
 	backupConfig := &BackupConfig{
-		DatabaseID:       databaseID,
-		IsBackupsEnabled: true,
-		StorePeriod:      period.PeriodDay,
+		DatabaseID:          databaseID,
+		IsBackupsEnabled:    true,
+		RetentionPolicyType: RetentionPolicyTypeTimePeriod,
+		RetentionTimePeriod: period.PeriodDay,
 		BackupInterval: &intervals.Interval{
 			Interval:  intervals.IntervalDaily,
 			TimeOfDay: &timeOfDay,

backend/internal/features/databases/controller.go

@@ -1,13 +1,14 @@
 package databases
 
 import (
-	users_middleware "databasus-backend/internal/features/users/middleware"
-	users_services "databasus-backend/internal/features/users/services"
-	workspaces_services "databasus-backend/internal/features/workspaces/services"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
+
+	users_middleware "databasus-backend/internal/features/users/middleware"
+	users_services "databasus-backend/internal/features/users/services"
+	workspaces_services "databasus-backend/internal/features/workspaces/services"
 )
 
 type DatabaseController struct {
@@ -29,6 +30,11 @@ func (c *DatabaseController) RegisterRoutes(router *gin.RouterGroup) {
 	router.GET("/databases/notifier/:id/databases-count", c.CountDatabasesByNotifier)
 	router.POST("/databases/is-readonly", c.IsUserReadOnly)
 	router.POST("/databases/create-readonly-user", c.CreateReadOnlyUser)
+	router.POST("/databases/:id/regenerate-token", c.RegenerateAgentToken)
+}
+
+func (c *DatabaseController) RegisterPublicRoutes(router *gin.RouterGroup) {
+	router.POST("/databases/verify-token", c.VerifyAgentToken)
 }
 
 // CreateDatabase
@@ -438,3 +444,61 @@ func (c *DatabaseController) CreateReadOnlyUser(ctx *gin.Context) {
 		Password: password,
 	})
 }
+
+// RegenerateAgentToken
+// @Summary Regenerate agent token for a database
+// @Description Generate a new agent token for the database. The token is returned once and stored as a hash.
+// @Tags databases
+// @Produce json
+// @Security BearerAuth
+// @Param id path string true "Database ID"
+// @Success 200 {object} map[string]string
+// @Failure 400 {object} map[string]string
+// @Failure 401 {object} map[string]string
+// @Router /databases/{id}/regenerate-token [post]
+func (c *DatabaseController) RegenerateAgentToken(ctx *gin.Context) {
+	user, ok := users_middleware.GetUserFromContext(ctx)
+	if !ok {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "User not authenticated"})
+		return
+	}
+
+	id, err := uuid.Parse(ctx.Param("id"))
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": "invalid database ID"})
+		return
+	}
+
+	token, err := c.databaseService.RegenerateAgentToken(user, id)
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	ctx.JSON(http.StatusOK, gin.H{"token": token})
+}
+
+// VerifyAgentToken
+// @Summary Verify agent token
+// @Description Verify that a given agent token is valid for any database
+// @Tags databases
+// @Accept json
+// @Produce json
+// @Param request body VerifyAgentTokenRequest true "Token to verify"
+// @Success 200 {object} map[string]string
+// @Failure 401 {object} map[string]string
+// @Router /databases/verify-token [post]
+func (c *DatabaseController) VerifyAgentToken(ctx *gin.Context) {
+	var request VerifyAgentTokenRequest
+	if err := ctx.ShouldBindJSON(&request); err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if err := c.databaseService.VerifyAgentToken(request.Token); err != nil {
+		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})
+		return
+	}
+
+	ctx.JSON(http.StatusOK, gin.H{"message": "token is valid"})
+}

backend/internal/features/databases/controller_test.go

@@ -13,10 +13,13 @@ import (
 	"github.com/stretchr/testify/assert"
 
 	"databasus-backend/internal/config"
+	"databasus-backend/internal/features/audit_logs"
 	"databasus-backend/internal/features/databases/databases/mariadb"
 	"databasus-backend/internal/features/databases/databases/mongodb"
 	"databasus-backend/internal/features/databases/databases/postgresql"
 	users_enums "databasus-backend/internal/features/users/enums"
+	users_middleware "databasus-backend/internal/features/users/middleware"
+	users_services "databasus-backend/internal/features/users/services"
 	users_testing "databasus-backend/internal/features/users/testing"
 	workspaces_controllers "databasus-backend/internal/features/workspaces/controllers"
 	workspaces_testing "databasus-backend/internal/features/workspaces/testing"
@@ -144,6 +147,66 @@ func Test_CreateDatabase_WhenUserIsNotWorkspaceMember_ReturnsForbidden(t *testin
 	assert.Contains(t, string(testResp.Body), "insufficient permissions")
 }
 
+func Test_CreateDatabase_WalV1Type_NoConnectionFieldsRequired(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	defer workspaces_testing.RemoveTestWorkspace(workspace, router)
+
+	request := Database{
+		Name:        "Test WAL Database",
+		WorkspaceID: &workspace.ID,
+		Type:        DatabaseTypePostgres,
+		Postgresql: &postgresql.PostgresqlDatabase{
+			BackupType: postgresql.PostgresBackupTypeWalV1,
+			CpuCount:   1,
+		},
+	}
+
+	var response Database
+	test_utils.MakePostRequestAndUnmarshal(
+		t,
+		router,
+		"/api/v1/databases/create",
+		"Bearer "+owner.Token,
+		request,
+		http.StatusCreated,
+		&response,
+	)
+	defer RemoveTestDatabase(&response)
+
+	assert.Equal(t, "Test WAL Database", response.Name)
+	assert.NotEqual(t, uuid.Nil, response.ID)
+}
+
+func Test_CreateDatabase_PgDumpType_ConnectionFieldsRequired(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	defer workspaces_testing.RemoveTestWorkspace(workspace, router)
+
+	request := Database{
+		Name:        "Test PG_DUMP Database",
+		WorkspaceID: &workspace.ID,
+		Type:        DatabaseTypePostgres,
+		Postgresql: &postgresql.PostgresqlDatabase{
+			BackupType: postgresql.PostgresBackupTypePgDump,
+			CpuCount:   1,
+		},
+	}
+
+	testResp := test_utils.MakePostRequest(
+		t,
+		router,
+		"/api/v1/databases/create",
+		"Bearer "+owner.Token,
+		request,
+		http.StatusBadRequest,
+	)
+
+	assert.Contains(t, string(testResp.Body), "host is required")
+}
+
 func Test_UpdateDatabase_PermissionsEnforced(t *testing.T) {
 	tests := []struct {
 		name               string
@@ -256,6 +319,52 @@ func Test_UpdateDatabase_WhenUserIsNotWorkspaceMember_ReturnsForbidden(t *testin
 	assert.Contains(t, string(testResp.Body), "insufficient permissions")
 }
 
+func Test_UpdateDatabase_WhenDatabaseTypeChanged_ReturnsBadRequest(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	defer workspaces_testing.RemoveTestWorkspace(workspace, router)
+
+	database := createTestDatabaseViaAPI("Test Database", workspace.ID, owner.Token, router)
+	defer RemoveTestDatabase(database)
+
+	database.Type = DatabaseTypeMysql
+
+	testResp := test_utils.MakePostRequest(
+		t,
+		router,
+		"/api/v1/databases/update",
+		"Bearer "+owner.Token,
+		database,
+		http.StatusBadRequest,
+	)
+
+	assert.Contains(t, string(testResp.Body), "database type cannot be changed")
+}
+
+func Test_UpdateDatabase_WhenBackupTypeChanged_ReturnsBadRequest(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	defer workspaces_testing.RemoveTestWorkspace(workspace, router)
+
+	database := createTestDatabaseViaAPI("Test Database", workspace.ID, owner.Token, router)
+	defer RemoveTestDatabase(database)
+
+	database.Postgresql.BackupType = postgresql.PostgresBackupTypeWalV1
+
+	testResp := test_utils.MakePostRequest(
+		t,
+		router,
+		"/api/v1/databases/update",
+		"Bearer "+owner.Token,
+		database,
+		http.StatusBadRequest,
+	)
+
+	assert.Contains(t, string(testResp.Body), "backup type cannot be changed")
+}
+
 func Test_DeleteDatabase_PermissionsEnforced(t *testing.T) {
 	tests := []struct {
 		name               string
@@ -753,7 +862,7 @@ func Test_DatabaseSensitiveDataLifecycle_AllTypes(t *testing.T) {
 		name                string
 		databaseType        DatabaseType
 		createDatabase      func(workspaceID uuid.UUID) *Database
-		updateDatabase      func(workspaceID uuid.UUID, databaseID uuid.UUID) *Database
+		updateDatabase      func(workspaceID, databaseID uuid.UUID) *Database
 		verifySensitiveData func(t *testing.T, database *Database)
 		verifyHiddenData    func(t *testing.T, database *Database)
 	}{
@@ -769,7 +878,7 @@ func Test_DatabaseSensitiveDataLifecycle_AllTypes(t *testing.T) {
 					Postgresql:  pgConfig,
 				}
 			},
-			updateDatabase: func(workspaceID uuid.UUID, databaseID uuid.UUID) *Database {
+			updateDatabase: func(workspaceID, databaseID uuid.UUID) *Database {
 				pgConfig := getTestPostgresConfig()
 				pgConfig.Password = ""
 				return &Database{
@@ -805,7 +914,7 @@ func Test_DatabaseSensitiveDataLifecycle_AllTypes(t *testing.T) {
 					Mariadb:     mariaConfig,
 				}
 			},
-			updateDatabase: func(workspaceID uuid.UUID, databaseID uuid.UUID) *Database {
+			updateDatabase: func(workspaceID, databaseID uuid.UUID) *Database {
 				mariaConfig := getTestMariadbConfig()
 				mariaConfig.Password = ""
 				return &Database{
@@ -841,7 +950,7 @@ func Test_DatabaseSensitiveDataLifecycle_AllTypes(t *testing.T) {
 					Mongodb:     mongoConfig,
 				}
 			},
-			updateDatabase: func(workspaceID uuid.UUID, databaseID uuid.UUID) *Database {
+			updateDatabase: func(workspaceID, databaseID uuid.UUID) *Database {
 				mongoConfig := getTestMongodbConfig()
 				mongoConfig.Password = ""
 				return &Database{
@@ -1050,6 +1159,87 @@ func Test_TestConnection_PermissionsEnforced(t *testing.T) {
 	}
 }
 
+func Test_RegenerateAgentToken_ReturnsToken(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	defer workspaces_testing.RemoveTestWorkspace(workspace, router)
+
+	database := createTestDatabaseViaAPI("Test Database", workspace.ID, owner.Token, router)
+	defer RemoveTestDatabase(database)
+
+	var response map[string]string
+	test_utils.MakePostRequestAndUnmarshal(
+		t,
+		router,
+		"/api/v1/databases/"+database.ID.String()+"/regenerate-token",
+		"Bearer "+owner.Token,
+		nil,
+		http.StatusOK,
+		&response,
+	)
+
+	assert.NotEmpty(t, response["token"])
+	assert.Len(t, response["token"], 32)
+
+	var updatedDatabase Database
+	test_utils.MakeGetRequestAndUnmarshal(
+		t,
+		router,
+		"/api/v1/databases/"+database.ID.String(),
+		"Bearer "+owner.Token,
+		http.StatusOK,
+		&updatedDatabase,
+	)
+	assert.True(t, updatedDatabase.IsAgentTokenGenerated)
+}
+
+func Test_VerifyAgentToken_WithValidToken_Succeeds(t *testing.T) {
+	router := createTestRouter()
+	owner := users_testing.CreateTestUser(users_enums.UserRoleMember)
+	workspace := workspaces_testing.CreateTestWorkspace("Test Workspace", owner, router)
+	defer workspaces_testing.RemoveTestWorkspace(workspace, router)
+
+	database := createTestDatabaseViaAPI("Test Database", workspace.ID, owner.Token, router)
+	defer RemoveTestDatabase(database)
+
+	var regenerateResponse map[string]string
+	test_utils.MakePostRequestAndUnmarshal(
+		t,
+		router,
+		"/api/v1/databases/"+database.ID.String()+"/regenerate-token",
+		"Bearer "+owner.Token,
+		nil,
+		http.StatusOK,
+		&regenerateResponse,
+	)
+
+	token := regenerateResponse["token"]
+	assert.NotEmpty(t, token)
+
+	w := workspaces_testing.MakeAPIRequest(
+		router,
+		"POST",
+		"/api/v1/databases/verify-token",
+		"",
+		VerifyAgentTokenRequest{Token: token},
+	)
+	assert.Equal(t, http.StatusOK, w.Code)
+}
+
+func Test_VerifyAgentToken_WithInvalidToken_Returns401(t *testing.T) {
+	router := createTestRouter()
+
+	w := workspaces_testing.MakeAPIRequest(
+		router,
+		"POST",
+		"/api/v1/databases/verify-token",
+		"",
+		VerifyAgentTokenRequest{Token: "invalidtoken00000000000000000000"},
+	)
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
+}
+
 func createTestDatabaseViaAPI(
 	name string,
 	workspaceID uuid.UUID,
@@ -1101,11 +1291,20 @@ func createTestDatabaseViaAPI(
 }
 
 func createTestRouter() *gin.Engine {
-	router := workspaces_testing.CreateTestRouter(
-		workspaces_controllers.GetWorkspaceController(),
-		workspaces_controllers.GetMembershipController(),
-		GetDatabaseController(),
-	)
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+
+	v1 := router.Group("/api/v1")
+	protected := v1.Group("").Use(users_middleware.AuthMiddleware(users_services.GetUserService()))
+
+	workspaces_controllers.GetWorkspaceController().RegisterRoutes(protected.(*gin.RouterGroup))
+	workspaces_controllers.GetMembershipController().RegisterRoutes(protected.(*gin.RouterGroup))
+	GetDatabaseController().RegisterRoutes(protected.(*gin.RouterGroup))
+
+	GetDatabaseController().RegisterPublicRoutes(v1)
+
+	audit_logs.SetupDependencies()
+
 	return router
 }
 
@@ -1118,13 +1317,14 @@ func getTestPostgresConfig() *postgresql.PostgresqlDatabase {
 
 	testDbName := "testdb"
 	return &postgresql.PostgresqlDatabase{
-		Version:  tools.PostgresqlVersion16,
-		Host:     config.GetEnv().TestLocalhost,
-		Port:     port,
-		Username: "testuser",
-		Password: "testpassword",
-		Database: &testDbName,
-		CpuCount: 1,
+		BackupType: postgresql.PostgresBackupTypePgDump,
+		Version:    tools.PostgresqlVersion16,
+		Host:       config.GetEnv().TestLocalhost,
+		Port:       port,
+		Username:   "testuser",
+		Password:   "testpassword",
+		Database:   &testDbName,
+		CpuCount:   1,
 	}
 }
 
@@ -1164,12 +1364,13 @@ func getTestMongodbConfig() *mongodb.MongodbDatabase {
 	return &mongodb.MongodbDatabase{
 		Version:      tools.MongodbVersion7,
 		Host:         config.GetEnv().TestLocalhost,
-		Port:         port,
+		Port:         &port,
 		Username:     "root",
 		Password:     "rootpassword",
 		Database:     "testdb",
 		AuthDatabase: "admin",
 		IsHttps:      false,
+		IsSrv:        false,
 		CpuCount:     1,
 	}
 }