check resize mode on update events (#1194)

* check resize mode on update events

* add unit test for PVC resizing

* set resize mode to pvc in charts and manifests

* add test for quantityToGigabyte

* just one debug line for syncing volumes

* extend test and update log msg

charts/postgres-operator/templates/clusterrole.yaml

@@ -105,6 +105,10 @@ rules:
   - delete
   - get
   - list
+{{- if toString .Values.configKubernetes.storage_resize_mode | eq "pvc" }}
+  - patch
+  - update
+{{- end }}
  # to read existing PVs. Creation should be done via dynamic provisioning
 - apiGroups:
   - ""
@@ -113,7 +117,9 @@ rules:
   verbs:
   - get
   - list
+{{- if toString .Values.configKubernetes.storage_resize_mode | eq "ebs" }}
   - update  # only for resizing AWS volumes
+{{- end }}
 # to watch Spilo pods and do rolling updates. Creation via StatefulSet
 - apiGroups:
   - ""

charts/postgres-operator/values-crd.yaml

@@ -136,7 +136,7 @@ configKubernetes:
   # whether the Spilo container should run in privileged mode
   spilo_privileged: false
   # storage resize strategy, available options are: ebs, pvc, off
-  storage_resize_mode: ebs
+  storage_resize_mode: pvc
   # operator watches for postgres objects in the given namespace
   watched_namespace: "*"  # listen to all namespaces
 

charts/postgres-operator/values.yaml

@@ -130,7 +130,7 @@ configKubernetes:
   # whether the Spilo container should run in privileged mode
   spilo_privileged: "false"
   # storage resize strategy, available options are: ebs, pvc, off
-  storage_resize_mode: ebs
+  storage_resize_mode: pvc
   # operator watches for postgres objects in the given namespace
   watched_namespace: "*"  # listen to all namespaces