[incubator/mysqlha] Use volumeClaimTemplates.spec.storageClassName (#4175)

* Use volumeClaimTemplates.spec.storageClassName

Instead of using volume.alpha storage class annotation which is
removed(?) in 1.9

* Bump chart version to 0.1.2

* Undefine persistence.storageClass by default

Add example for persistence.storageClass option in values.yaml to better
comply with chart review guidelines.

* mysqlha: Add appVersion to Chart.yaml

appVersion is now a required Chart metadata field, add mysql version to
this field.

* [incubator/mysqlha] Change templating for volumeClaimTemplates

* (Re)add annotations templating

* Change accessModes templating to accept list
  Rename persistence.accessMode to persistence.accessModes to
  reflect this change

* If set persistence.storageClass is set to `-`,
  set storageClassName: "", which disables dynamic provisioning

* [incubator/mysqlha] Swap contents of if/else blocks for volumeClaimTemplates

* Denote that k8s 1.6 is now a requirement in readme

* Add documentation for default provisioner used in Azure

* Bump Chart version to 0.2.0

incubator/mysqlha/Chart.yaml

@@ -1,5 +1,5 @@
 name: mysqlha
-version: 0.1.3
+version: 0.2.0
 appVersion: 5.7.13
 description: MySQL cluster with a single master and zero or more slave replicas
 keywords:

incubator/mysqlha/README.md

@@ -8,7 +8,7 @@ This chart bootstraps a single master and multiple slave MySQL deployment on a [
 
 ## Prerequisites
 
-- Kubernetes 1.4+ with Beta APIs enabled
+- Kubernetes 1.6+
 - PV provisioner support in the underlying infrastructure
 
 ## Installing the Chart
@@ -47,7 +47,8 @@ The following table lists the configurable parameters of the MySQL chart and the
 | `persistence.enabled`      | Create a volume to store data       | true                                   | 
 | `persistence.size`         | Size of persistent volume claim     | 10Gi                                   |
 | `persistence.storageClass` | Type of persistent volume claim     | `nil`                                  |
-| `persistence.accessMode`   | ReadWriteOnce or ReadOnly           | ReadWriteOnce                          |
+| `persistence.accessModes`  | Persistent volume access modes      | `[ReadWriteOnce]`                      |
+| `persistence.annotations`  | Persistent volume annotations       | `{}`                                   |
 | `resources`                | CPU/Memory resource requests/limits | Memory: `128Mi`, CPU: `100m`           |
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,

incubator/mysqlha/templates/statefulset.yaml

@@ -223,22 +223,30 @@ spec:
           name: {{ template "fullname" . }}
       - name: scripts
         emptyDir: {}
-      {{- if eq .Values.persistence.enabled false }}
-      - name: data
-        emptyDir: {}
-      {{- end}}
+{{- if .Values.persistence.enabled }}
   volumeClaimTemplates:
-  {{- if .Values.persistence.enabled }}
   - metadata:
       name: data
       annotations:
-        {{- if .Values.persistence.storageClass }}
-        volume.alpha.kubernetes.io/storage-class: {{ .Values.persistence.storageClass }}
-        {{- end }}
+      {{- range $key, $value := .Values.persistence.annotations }}
+        {{ $key }}: {{ $value }}
+      {{- end }}
     spec:
       accessModes:
-      - {{ .Values.persistence.accessMode | quote }}
+      {{- range .Values.persistence.accessModes }}
+      - {{ . | quote }}
+      {{- end }}
       resources:
         requests:
           storage: {{ .Values.persistence.size | quote }}
-  {{- end }}
+      {{- if .Values.persistence.storageClass }}
+      {{- if (eq "-" .Values.persistence.storageClass) }}
+      storageClassName: ""
+      {{- else }}
+      storageClassName: "{{ .Values.persistence.storageClass }}"
+      {{- end }}
+      {{- end }}
+{{- else }}
+      - name: data
+        emptyDir: {}
+{{- end }}

incubator/mysqlha/values.yaml

@@ -34,10 +34,17 @@ mysqlha:
 ##
 persistence:
   enabled: true
-  ## If defined, volume.beta.kubernetes.io/storage-class: <storageClass>
+  ## If defined, storageClassName: <storageClass>
+  ## If set to "-", storageClassName: "", which disables dynamic provisioning
+  ## If undefined (the default) or set to null, no storageClassName spec is
+  ##   set, choosing the default provisioner.  (gp2 on AWS, azure-disk on
+  ##   Azure, standard on GKE, AWS & OpenStack)
   ##
-  accessMode: ReadWriteOnce
+  # storageClass: "-"
+  accessModes:
+  - ReadWriteOnce
   size: 10Gi
+  annotations: {}
 
 resources:
   requests: