Remove hard-coded UpdateStrategy from templates

Provided an option to specify the UpdateStrategy
in helm  charts.

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

charts/ceph-csi-cephfs/templates/nodeplugin-daemonset.yaml

@@ -15,6 +15,8 @@ spec:
       app: {{ include "ceph-csi-cephfs.name" . }}
       component: {{ .Values.nodeplugin.name }}
       release: {{ .Release.Name }}
+  updateStrategy:
+    type: {{ .Values.nodeplugin.updateStrategy }}
   template:
     metadata:
       labels:

charts/ceph-csi-cephfs/values.yaml

@@ -29,6 +29,8 @@ csiConfig: []
 
 nodeplugin:
   name: nodeplugin
+  # if you are using ceph-fuse client set this value to OnDelete
+  updateStrategy: RollingUpdate
 
   httpMetrics:
     # Metrics only available for cephcis/cephsi => 1.2.0

charts/ceph-csi-rbd/templates/nodeplugin-daemonset.yaml

@@ -16,7 +16,7 @@ spec:
       component: {{ .Values.nodeplugin.name }}
       release: {{ .Release.Name }}
   updateStrategy:
-    type: OnDelete
+    type: {{ .Values.nodeplugin.updateStrategy }}
   template:
     metadata:
       labels:

charts/ceph-csi-rbd/values.yaml

@@ -29,6 +29,8 @@ csiConfig: []
 
 nodeplugin:
   name: nodeplugin
+  # if you are using rbd-nbd client set this value to OnDelete
+  updateStrategy: RollingUpdate
 
   httpMetrics:
     # Metrics only available for cephcsi/cephcsi => 1.2.0

deploy/rbd/kubernetes/v1.13/csi-rbdplugin.yaml

@@ -7,8 +7,6 @@ spec:
   selector:
     matchLabels:
       app: csi-rbdplugin
-  updateStrategy:
-    type: OnDelete
   template:
     metadata:
       labels:

deploy/rbd/kubernetes/v1.14+/csi-rbdplugin.yaml

@@ -7,8 +7,6 @@ spec:
   selector:
     matchLabels:
       app: csi-rbdplugin
-  updateStrategy:
-    type: OnDelete
   template:
     metadata:
       labels: