Propagate annotations to the StatefulSet (#932)

* Initial commit

* Corrections

- set the type of the new  configuration parameter to be array of
  strings
- propagate the annotations to statefulset at sync

* Enable regular expression matching

* Improvements

-handle rollingUpdate flag
-modularize code
-rename config parameter name

* fix merge error

* Pass annotations to connection pooler deployment

* update code-gen

* Add documentation and update manifests

* add e2e test and introduce option in configmap

* fix service annotations test

* Add unit test

* fix e2e tests

* better key lookup of annotations tests

* add debug message for annotation tests

* Fix typos

* minor fix for looping

* Handle update path and renaming

- handle the update path to update sts and connection pooler deployment.
  This way no need to wait for sync
- rename the parameter to downscaler_annotations
- handle other review comments

* another try to fix python loops

* Avoid unneccessary update events

* Update manifests

* some final polishing

* fix cluster_test after polishing

Co-authored-by: Rafia Sabih <rafia.sabih@zalando.de>
Co-authored-by: Felix Kunde <felix-kunde@gmx.de>

pkg/controller/operator_config.go

@@ -73,6 +73,7 @@ func (c *Controller) importConfigurationFromCRD(fromCRD *acidv1.OperatorConfigur
 	result.PodRoleLabel = fromCRD.Kubernetes.PodRoleLabel
 	result.ClusterLabels = fromCRD.Kubernetes.ClusterLabels
 	result.InheritedLabels = fromCRD.Kubernetes.InheritedLabels
+	result.DownscalerAnnotations = fromCRD.Kubernetes.DownscalerAnnotations
 	result.ClusterNameLabel = fromCRD.Kubernetes.ClusterNameLabel
 	result.NodeReadinessLabel = fromCRD.Kubernetes.NodeReadinessLabel
 	result.PodPriorityClassName = fromCRD.Kubernetes.PodPriorityClassName

pkg/controller/postgresql.go

@@ -487,7 +487,9 @@ func (c *Controller) postgresqlUpdate(prev, cur interface{}) {
 	if pgOld != nil && pgNew != nil {
 		// Avoid the inifinite recursion for status updates
 		if reflect.DeepEqual(pgOld.Spec, pgNew.Spec) {
-			return
+			if reflect.DeepEqual(pgNew.Annotations, pgOld.Annotations) {
+				return
+			}
 		}
 		c.queueClusterEvent(pgOld, pgNew, EventUpdate)
 	}