Support inherited annotations for all major objects (#1236)

* add comments where inherited annotations could be added

* add inheritedAnnotations feature

* return nil if no annotations are set

* minor changes

* first downscaler then inherited annotations

* add unit test for inherited annotations

* add pvc to test + minor changes

* missing comma

* fix nil map assignment

* set annotations in the same order it is done in other places

* replace acidClientSet with acid getters in K8s client

* more fixes on clientSet vs getters

* minor changes

* remove endpoints from annotation test

* refine unit test - but deployment and sts are still empty

* fix checkinng sts and deployment

* make annotations setter one liners

* no need for len check anymore

Co-authored-by: Rafia Sabih <rafia.sabih@zalando.de>

pkg/cluster/util.go

@@ -271,6 +271,33 @@ func (c *Cluster) getTeamMembers(teamID string) ([]string, error) {
 	return members, nil
 }
 
+// Returns annotations to be passed to child objects
+func (c *Cluster) annotationsSet(annotations map[string]string) map[string]string {
+
+	if annotations == nil {
+		annotations = make(map[string]string)
+	}
+
+	pgCRDAnnotations := c.ObjectMeta.Annotations
+
+	// allow to inherit certain labels from the 'postgres' object
+	if pgCRDAnnotations != nil {
+		for k, v := range pgCRDAnnotations {
+			for _, match := range c.OpConfig.InheritedAnnotations {
+				if k == match {
+					annotations[k] = v
+				}
+			}
+		}
+	}
+
+	if len(annotations) > 0 {
+		return annotations
+	}
+
+	return nil
+}
+
 func (c *Cluster) waitForPodLabel(podEvents chan PodEvent, stopChan chan struct{}, role *PostgresRole) (*v1.Pod, error) {
 	timeout := time.After(c.OpConfig.PodLabelWaitTimeout)
 	for {