[Bugfix] Fix Rebalancer V2 Job (From/To) (#1355)

Author: ajanikow

CHANGELOG.md

@@ -10,6 +10,7 @@
 - (Bugfix) Fix for ContextExceeded error during backup upload
 - (Feature) Version Check V2
 - (Bugfix) Disable VersionCheck V2 by default
+- (Bugfix) Fix Rebalancer V2 Job (From/To)
 
 ## [1.2.30](https://github.com/arangodb/kube-arangodb/tree/1.2.30) (2023-06-16)
 - (Feature) AgencyCache Interface

README.md

@@ -72,6 +72,7 @@ covers individual newer features separately.
 | [Failover Leader service](docs/design/features/failover_leader_service.md)           | 1.2.13           | >= 3.7.0         | Community, Enterprise | 1.2.13     | Production   | False   | --deployment.feature.failover-leadership              | N/A                                                                      |
 | [Spec Default Restore](docs/design/features/deployment_spec_defaults.md)             | 1.2.21           | >= 3.7.0         | Community, Enterprise | 1.2.21     | Beta         | True    | --deployment.feature.deployment-spec-defaults-restore | If set to False Operator will not change ArangoDeployment Spec           |
 | [Force Rebuild Out Synced Shards](docs/design/features/rebuild_out_synced_shards.md) | 1.2.27           | >= 3.8.0         | Community, Enterprise | 1.2.27     | Beta         | False   | --deployment.feature.force-rebuild-out-synced-shards  | It should be used only if user is aware of the risks.                    |
+| [Rebalancer V2](docs/design/features/rebalancer_v2.md)                               | 1.2.31           | >= 3.10.0        | Community, Enterprise | 1.2.31     | Alpha        | False   | --deployment.feature.rebalancer-v2                    | N/A                                                                      |
 
 ## Operator Community Edition (CE)
 

docs/design/features/rebalancer_v2.md

@@ -0,0 +1,25 @@
+# ArangoDB Rebalancer Support
+
+## Overview
+
+ArangoDB as of 3.10.0 provide Cluster Rebalancer functionality via [api](https://www.arangodb.com/docs/stable/http/cluster.html#rebalance).
+
+Operator will use above functionality to check shard movement plan and enforce it on the Cluster.
+
+
+## How to use
+
+To enable this feature use `--deployment.feature.rabalancer-v2` arg, which needs be passed to the operator:
+
+```shell
+helm upgrade --install kube-arangodb \
+https://github.com/arangodb/kube-arangodb/releases/download/$VER/kube-arangodb-$VER.tgz \
+  --set "operator.args={--deployment.feature.rabalancer-v2}"
+```
+
+To enable Rebalancer in ArangoDeployment:
+```yaml
+spec:
+   rebalancer:
+     enabled: true
+```

pkg/deployment/reconcile/action_rebalancer_generate_v2.go

@@ -104,8 +104,8 @@ func (r actionRebalancerGenerateV2) Start(ctx context.Context) (bool, error) {
 				Database:   db,
 				Collection: move.Collection.String(),
 				Shard:      move.Shard,
-				From:       move.To,
-				To:         move.From,
+				From:       move.From,
+				To:         move.To,
 			}
 		}