[stable/kapacitor] Update to the recommended pvc patterns. (#450)

* Convert chart kapacitor to use the recommended pvc patterns

* Update pvc.yaml

* Update Chart.yaml

* Update _helpers.tpl

stable/kapacitor/Chart.yaml

@@ -1,5 +1,5 @@
 name: kapacitor
-version: 0.1.0
+version: 0.1.1
 description: Chart for Chronograf
 keywords:
 - kapacitor
@@ -10,4 +10,4 @@ home: https://www.influxdata.com/time-series-platform/kapacitor/
 maintainers:
 - name: Jack Zampolin
   email: jack@influxdb.com
-engine: gotpl
+engine: gotpl

stable/kapacitor/templates/_helpers.tpl

@@ -3,14 +3,14 @@
 Expand the name of the chart.
 */}}
 {{- define "name" -}}
-{{- default .Chart.Name .Values.nameOverride | trunc 24 -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
 
 {{/*
 Create a default fully qualified app name.
-We truncate at 24 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
 */}}
 {{- define "fullname" -}}
 {{- $name := default .Chart.Name .Values.nameOverride -}}
-{{- printf "%s-%s" .Release.Name $name | trunc 24 -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
 {{- end -}}

stable/kapacitor/templates/pvc.yaml

@@ -9,7 +9,11 @@ metadata:
     app: {{ template "fullname" . }}
     name: {{ template "fullname" . }}
   annotations:
-    volume.alpha.kubernetes.io/storage-class: {{ .Values.persistence.storageClass | quote }}
+  {{- if .Values.persistence.storageClass }}
+    volume.beta.kubernetes.io/storage-class: {{ .Values.persistence.storageClass | quote }}
+  {{- else }}
+    volume.alpha.kubernetes.io/storage-class: default
+  {{- end }}
 spec:
   accessModes:
     - {{ .Values.persistence.accessMode | quote }}

stable/kapacitor/values.yaml

@@ -17,7 +17,10 @@ service:
 ##
 persistence:
   enabled: false
-  storageClass: generic
+  ## If defined, volume.beta.kubernetes.io/storage-class: <storageClass>
+  ## Default: volume.alpha.kubernetes.io/storage-class: default
+  ##
+  # storageClass:
   accessMode: ReadWriteOnce
   size: 8Gi