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>

manifests/configmap.yaml

@@ -30,6 +30,7 @@ data:
   # default_memory_limit: 500Mi
   # default_memory_request: 100Mi
   docker_image: registry.opensource.zalan.do/acid/spilo-cdp-12:1.6-p115
+  # downscaler_annotations: "deployment-time,downscaler/*"
   # enable_admin_role_for_users: "true"
   # enable_crd_validation: "true"
   # enable_database_access: "true"

manifests/operatorconfiguration.crd.yaml

@@ -93,6 +93,10 @@ spec:
                   type: object
                   additionalProperties:
                     type: string
+                downscaler_annotations:
+                  type: array
+                  items:
+                    type: string
                 enable_init_containers:
                   type: boolean
                 enable_pod_antiaffinity:

manifests/postgresql-operator-default-configuration.yaml

@@ -31,6 +31,9 @@ configuration:
     # custom_pod_annotations:
     #   keya: valuea
     #   keyb: valueb
+    # downscaler_annotations:
+    # - deployment-time
+    # - downscaler/*
     enable_init_containers: true
     enable_pod_antiaffinity: false
     enable_pod_disruption_budget: true