Allow designating storage class as default

README.md

@@ -22,6 +22,9 @@ helm install .
 
 ## Usage
 
-Once this provisioner is installed on your cluster, you can automatically
-provision local storage volumes by using the `storageClassName`: `local` in
-your persistent volume claims.
+Once this provisioner is installed on your cluster, you can make volumes use it
+by using `storageClassName: local` in your persistent volume claims.
+
+Alternatively, you could set this chart's value `defaultStorageClass` to `true`
+before installing; then persistent volume claims that do not specify a storage
+class are also served.

templates/deployment.yaml

@@ -35,5 +35,9 @@ apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
 metadata:
   name: local
+  annotations:
+  {{- if .Values.defaultStorageClass }}
+    storageclass.kubernetes.io/is-default-class: "true"
+  {{- end }}
 provisioner: openappstack/local-provisioner
 parameters:

values.yaml

 # This is the directory on the node under which all data from persistent
 # volumes created by this provisioner will be stored.
 storageDirectory: "/var/lib/OpenAppStack/local-storage"
+
 image:
   repository: "docker.greenhost.net/openappstack/local-storage/provisioner"
   tag: "develop"
   imagePullPolicy: "Always"
+
+# Make this storage class the default, so persistent volume claims that do not
+# specify a class are served by this provisioner.
+defaultStorageClass: false