feature: Add conntrack state aware migrations of VMs.

Fixes: #305

.changelogs/1.1.7/305_add_conntrack_support_for_migrations.yml

@@ -0,0 +1,2 @@
+added:
+  - Add conntrack state aware migrations of VMs (@gyptazy). [#305]

.changelogs/1.1.7/release_meta.yml

@@ -0,0 +1 @@
+date: TBD

README.md

@@ -267,6 +267,7 @@ The following options can be set in the configuration file `proxlb.yaml`:
 |  | parallel_jobs |  | 5 | `Int` | The amount if parallel jobs when migrating guests. (default: `5`)|
 |  | live |  | True | `Bool` | If guests should be moved live or shutdown.|
 |  | with_local_disks |  | True | `Bool` | If balancing of guests should include local disks.|
+|  | with_conntrack_state |  | True | `Bool` | If balancing of guests should including the conntrack state.|
 |  | balance_types |  | ['vm', 'ct'] | `List` | Defined the types of guests that should be honored. [values: `vm`, `ct`]|
 |  | max_job_validation |  | 1800 | `Int` | How long a job validation may take in seconds. (default: 1800) |
 |  | balanciness |  | 10 | `Int` | The maximum delta of resource usage between node with highest and lowest usage. |
@@ -310,6 +311,7 @@ balancing:
   parallel: False
   live: True
   with_local_disks: True
+  with_conntrack_state: True
   balance_types: ['vm', 'ct']
   max_job_validation: 1800
   balanciness: 5

config/proxlb_example.yaml

@@ -25,6 +25,7 @@ balancing:
   parallel_jobs: 1
   live: True
   with_local_disks: True
+  with_conntrack_state: True
   balance_types: ['vm', 'ct']
   max_job_validation: 1800
   balanciness: 5

helm/proxlb/values.yaml

@@ -43,6 +43,7 @@ configmap:
       parallel_jobs: 1
       live: True
       with_local_disks: True
+      with_conntrack_state: True
       balance_types: [ 'vm', 'ct' ]
       max_job_validation: 1800
       balanciness: 5

proxlb/models/balancing.py

@@ -154,10 +154,16 @@ class Balancing:
         else:
             with_local_disks = 0
 
+        if proxlb_data["meta"]["balancing"].get("with_conntrack_state", True):
+            with_conntrack_state = 1
+        else:
+            with_conntrack_state = 0
+
         migration_options = {
             'target': {guest_node_target},
             'online': online_migration,
-            'with-local-disks': with_local_disks
+            'with-local-disks': with_local_disks,
+            'with-conntrack-state': with_conntrack_state,
         }
 
         try: