Enable default StorageClass support in the rbd-provisioner

Add rbd-provisioner chart support for specifying a specific storage
class as the default system storage class.

This allows chart releases to make persistent volume claims without
specifying a specific StorageClass.

Change-Id: I74d4f39432734df7cdaba22590ed0e4b6949839f
Story: 2005424
Task: 31009
Signed-off-by: Robert Church <robert.church@windriver.com>

stx-platform-helm/centos/build_srpm.data

@@ -5,4 +5,4 @@ $PKG_BASE/../../../helm-charts/node-feature-discovery \
 $PKG_BASE/../../../helm-charts/rbd-provisioner  \
 $PKG_BASE/../../../helm-charts/ceph-pools-audit"
 
-TIS_PATCH_VER=4
+TIS_PATCH_VER=5

stx-platform-helm/stx-platform-helm/helm-charts/rbd-provisioner/templates/storageclass.yaml

@@ -10,10 +10,15 @@
 {{ $namespace := .Release.Namespace }}
 {{ $defaults := .Values.classdefaults}}
 {{ $provisioner := .Values.global.provisioner_name }}
+{{ $defaultSC := .Values.global.defaultStorageClass }}
 {{- range $classConfig := .Values.classes }}
 apiVersion: storage.k8s.io/v1
 kind: StorageClass
 metadata:
+    {{- if eq $defaultSC $classConfig.name}}
+    annotations:
+        "storageclass.kubernetes.io/is-default-class": "true"
+    {{- end }}
     name: {{ $classConfig.name }}
 provisioner: {{ $provisioner }}
 parameters:

stx-platform-helm/stx-platform-helm/helm-charts/rbd-provisioner/values.yaml

@@ -38,6 +38,10 @@ global:
   #
   provisionStorageClass: true
   #
+  # Enable this storage class as the system default storage class
+  #
+  defaultStorageClass: fast-rbd
+  #
   # Choose if rbd-provisioner pod should be deployed as deplyment or DaemonSet
   # Values: none, Deployment, DaemonSet
   #