[cinder-csi-plugin] add clusterID Helm value (kubernetes#1741)

Author: gman0

charts/cinder-csi-plugin/templates/controllerplugin-deployment.yaml

@@ -115,7 +115,7 @@ spec:
             - name: CLOUD_CONFIG
               value: /etc/kubernetes/cloud-config
             - name: CLUSTER_NAME
-              value: kubernetes
+              value: "{{ .Values.clusterID }}"
           ports:
             - containerPort: 9808
               name: healthz

charts/cinder-csi-plugin/values.yaml

@@ -140,4 +140,8 @@ storageClass:
 #     driver: cinder.csi.openstack.org
 #     deletionPolicy: Delete
 
+# You may set ID of the cluster where openstack-cinder-csi is deployed. This value will be appended
+# to volume metadata in newly provisioned volumes as `cinder.csi.openstack.org/cluster=<cluster ID>`.
+clusterID: "kubernetes"
+
 priorityClassName: ""