[stable/postgresql] bump major version

stable/postgresql/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: postgresql
-version: 6.6.0
+version: 7.0.0
 appVersion: 11.5.0
 description: Chart for PostgreSQL, an object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance.
 keywords:

stable/postgresql/README.md

@@ -373,6 +373,13 @@ $ helm upgrade my-release bitnami/influxdb \
 
 > Note: you need to substitute the placeholders _[POSTGRESQL_PASSWORD]_, and _[REPLICATION_PASSWORD]_ with the values obtained from instructions in the installation notes.
 
+## 7.0.0
+
+Helm performs a lookup for the object based on its group (apps), version (v1), and kind (Deployment). Also known as its GroupVersionKind, or GVK. Changing the GVK is considered a compatibility breaker from Kubernetes' point of view, so you cannot "upgrade" those objects to the new GVK in-place. Earlier versions of Helm 3 did not perform the lookup correctly which has since been fixed to match the spec.
+
+In https://github.com/helm/charts/pull/17281 the `apiVersion` of the statefulset resources was updated to `apps/v1` in tune with the api's deprecated, resulting in compatibility breakage.
+
+This major version bump signifies this change.
 
 ## 5.0.0
 

stable/postgresql/templates/_helpers.tpl

@@ -361,3 +361,14 @@ Usage:
         {{- tpl (.value | toYaml) .context }}
     {{- end }}
 {{- end -}}
+
+{{/*
+Return the appropriate apiVersion for statefulset.
+*/}}
+{{- define "postgresql.statefulset.apiVersion" -}}
+{{- if semverCompare "<1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+{{- print "apps/v1beta2" -}}
+{{- else -}}
+{{- print "apps/v1" -}}
+{{- end -}}
+{{- end -}}

stable/postgresql/templates/statefulset-slaves.yaml

@@ -1,5 +1,5 @@
 {{- if .Values.replication.enabled }}
-apiVersion: apps/v1
+apiVersion: {{ template "postgresql.statefulset.apiVersion" . }}
 kind: StatefulSet
 metadata:
   name: "{{ template "postgresql.fullname" . }}-slave"

stable/postgresql/templates/statefulset.yaml

@@ -1,4 +1,4 @@
-apiVersion: apps/v1
+apiVersion: {{ template "postgresql.statefulset.apiVersion" . }}
 kind: StatefulSet
 metadata:
   name: {{ template "postgresql.master.fullname" . }}