Enable leader election in v1.14+

Use Deployment with leader election instead of StatefulSet

Deployment behaves better when a node gets disconnected
from the rest of the cluster - new provisioner leader
is elected in ~15 seconds, while it may take up to
5 minutes for StatefulSet to start a new replica.

Refer: kubernetes-csi/external-provisioner@52d1fbc

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

deploy/rbd/kubernetes/v1.14+/helm/templates/nodeplugin-rules-clusterrole.yaml

@@ -0,0 +1,29 @@
+{{- if .Values.rbac.create -}}
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ include "ceph-csi-rbd.nodeplugin.fullname" . }}-rules
+  labels:
+    app: {{ include "ceph-csi-rbd.name" . }}
+    chart: {{ include "ceph-csi-rbd.chart" . }}
+    component: {{ .Values.nodeplugin.name }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+    rbac.rbd.csi.ceph.com/aggregate-to-{{ include "ceph-csi-rbd.nodeplugin.fullname" . }}: "true"
+rules:
+  - apiGroups: [""]
+    resources: ["nodes"]
+    verbs: ["get", "list", "update"]
+  - apiGroups: [""]
+    resources: ["namespaces"]
+    verbs: ["get", "list"]
+  - apiGroups: [""]
+    resources: ["persistentvolumes"]
+    verbs: ["get", "list", "watch", "update"]
+  - apiGroups: ["storage.k8s.io"]
+    resources: ["volumeattachments"]
+    verbs: ["get", "list", "watch", "update"]
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    verbs: ["get", "list"]
+{{- end -}}