Thumbnails don't work with S3 storage #1366

New Issue

MrUnknownDE · 2026-04-06T00:08:33+02:00

MrUnknownDE commented

2026-04-06 00:08:33 +02:00

Originally created by @llamafilm on 8/30/2025

Deployment Type

Self-hosted

NetBox Version

v4.4.0-beta1

Python Version

3.12

Steps to Reproduce

I first opened this as discussion #20113 but after further investigation I'm convinced it's a bug in the sorl-thumbnail library.

With the default storage in S3, thumbnails are never generated or loaded.

Steps to reproduce:

Configure the default storage to be in S3 like this:

STORAGES = {
    "default": {
        "BACKEND": "storages.backends.s3.S3Storage",
        "OPTIONS": {
            'bucket_name': 'mybucket',
            'region_name': 'us-east-1',
            'location': 'storage'
        }
    },
}

Load any image-attachments webpage, i.e. /dcim/locations/12218/image-attachments/.

Expected Behavior

Thumbnails should be generated automatically, written to S3, and displayed in the browser.

Observed Behavior

It just displays the filename with no image.

*Originally created by @llamafilm on 8/30/2025* ### Deployment Type Self-hosted ### NetBox Version v4.4.0-beta1 ### Python Version 3.12 ### Steps to Reproduce I first opened this as discussion #20113 but after further investigation I'm convinced it's a bug in the sorl-thumbnail library. With the default storage in S3, thumbnails are never generated or loaded. Steps to reproduce: 1. Configure the default storage to be in S3 like this: ```py STORAGES = { "default": { "BACKEND": "storages.backends.s3.S3Storage", "OPTIONS": { 'bucket_name': 'mybucket', 'region_name': 'us-east-1', 'location': 'storage' } }, } ``` 2. Load any image-attachments webpage, i.e. `/dcim/locations/12218/image-attachments/`. ### Expected Behavior Thumbnails should be generated automatically, written to S3, and displayed in the browser. ### Observed Behavior It just displays the filename with no image. <img width="1202" height="257" alt="Image" src="https://github.com/user-attachments/assets/d71ac74b-96dd-426a-8955-981f00e2cd15" />

MrUnknownDE closed this issue

2026-04-06 00:08:33 +02:00

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main

21455-sql-indexes-audit

21357-register-model-actions

feature

20924-plugin-ui-components

21766-improve-test-coverage-for-sortable-table-columns

21157-export-template-public-models

21025-pre-render-config-contexts

21364-swagger

feature-ip-prefix-link

20911-dropdown-3

fix_module_substitution

21160-filterset

20911-dropdown-2

20044-elevation-stuck-lightmode

7604-filter-modifiers-v3

20660-script-load

19724-graphql

14884-script

19720-macaddress-interface-generic-relation

fix-19669-api-image-download

7604-filter-modifiers

19275-fixes-interface-bulk-edit

fix-17794-get_field_value_return_list

11507-show-aggregate-and-rir-on-api

9583-add_column_specific_search_field_to_tables

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Due Date

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Dependencies

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Reference: github/netbox#1366