upgrade snapshot to v2.1.1 (kubernetes#974)

https://github.com/kubernetes-csi/external-snapshotter/releases
has a broken update when upgrade to 2.1.1

so the upgrade of the side car container including:
1) upgrade the version
2) honor the split of snapshot controller and snapshotter
3) update rbac
4) update example according to the v1beta1 definition

The helm chart is updated as well

Author: jichenjc

docs/using-cinder-csi-plugin.md

@@ -122,7 +122,7 @@ You should make sure following similar pods are ready before proceed:
 
 ```
 NAME                                READY   STATUS    RESTARTS   AGE
-csi-cinder-controllerplugin         4/4     Running   0          29h
+csi-cinder-controllerplugin         5/5     Running   0          29h
 csi-cinder-nodeplugin               2/2     Running   0          46h
 ```
 
@@ -248,8 +248,10 @@ Note: `allowedTopologies` can be specified in storage class to restrict the topo
 
 Following prerequisite needed for volume snapshot feature to work.
 
-1. Enable `--feature-gates=VolumeSnapshotDataSource=true` in kube-apiserver
-2. Make sure, your csi deployment contains external-snapshotter sidecar container, external-snapshotter sidecar container will create three crd's for snapshot management VolumeSnapshot,VolumeSnapshotContent, and VolumeSnapshotClass. external-snapshotter is a part of `csi-cinder-controllerplugin`
+1. Download all yaml files from [snapshot crd](https://github.com/kubernetes-csi/external-snapshotter/tree/v2.1.1/config/crd)
+2. Apply all yaml files downloaded at step 1) by using `kubectl apply -f ` command, as currently there is no released yaml file from `external-snapshotter` community.
+3. Download all yaml files from [snapshot-controller](https://github.com/kubernetes-csi/external-snapshotter/tree/master/deploy/kubernetes/snapshot-controller) and optionally update all namespaces from `default` to `kube-system` in the yaml files.
+4. Apply all yaml files downloaded at step 3) by using `kubectl apply -f ` command.
 
 Supported parameters for VolumeSnapshotClass:
 * `force-create`: Support creating snapshot for a volume in in-use status.

examples/cinder-csi-plugin/snapshot/example.yaml

@@ -6,11 +6,12 @@ provisioner: cinder.csi.openstack.org
 
 ---
 
-apiVersion: snapshot.storage.k8s.io/v1alpha1
+apiVersion: snapshot.storage.k8s.io/v1beta1
 kind: VolumeSnapshotClass
 metadata:
   name: csi-cinder-snapclass
-snapshotter: cinder.csi.openstack.org
+driver: cinder.csi.openstack.org
+deletionPolicy: Delete
 parameters:
   force-create: "false"
 

examples/cinder-csi-plugin/snapshot/snapshotcreate.yaml

@@ -1,9 +1,8 @@
-apiVersion: snapshot.storage.k8s.io/v1alpha1
+apiVersion: snapshot.storage.k8s.io/v1beta1
 kind: VolumeSnapshot
 metadata:
   name: new-snapshot-demo
 spec:
-  snapshotClassName: csi-cinder-snapclass
+  volumeSnapshotClassName: csi-cinder-snapclass
   source:
-    name: pvc-snapshot-demo
-    kind: PersistentVolumeClaim
+    persistentVolumeClaimName: pvc-snapshot-demo

manifests/cinder-csi-plugin/cinder-csi-controllerplugin-rbac.yaml

@@ -95,37 +95,25 @@ apiVersion: rbac.authorization.k8s.io/v1
 metadata:
   name: csi-snapshotter-role
 rules:
-  - apiGroups: [""]
-    resources: ["persistentvolumes"]
-    verbs: ["get", "list", "watch"]
-  - apiGroups: [""]
-    resources: ["persistentvolumeclaims"]
-    verbs: ["get", "list", "watch"]
-  - apiGroups: ["storage.k8s.io"]
-    resources: ["storageclasses"]
-    verbs: ["get", "list", "watch"]
   - apiGroups: [""]
     resources: ["events"]
     verbs: ["list", "watch", "create", "update", "patch"]
-  - apiGroups: [""]
-    resources: ["secrets"]
-    verbs: ["get", "list"]
+  # Secret permission is optional.
+  # Enable it if your driver needs secret.
+  # For example, `csi.storage.k8s.io/snapshotter-secret-name` is set in VolumeSnapshotClass.
+  # See https://kubernetes-csi.github.io/docs/secrets-and-credentials.html for more details.
+  #  - apiGroups: [""]
+  #    resources: ["secrets"]
+  #    verbs: ["get", "list"]
   - apiGroups: ["snapshot.storage.k8s.io"]
     resources: ["volumesnapshotclasses"]
     verbs: ["get", "list", "watch"]
   - apiGroups: ["snapshot.storage.k8s.io"]
     resources: ["volumesnapshotcontents"]
     verbs: ["create", "get", "list", "watch", "update", "delete"]
   - apiGroups: ["snapshot.storage.k8s.io"]
-    resources: ["volumesnapshots"]
-    verbs: ["get", "list", "watch", "update"]
-  - apiGroups: ["snapshot.storage.k8s.io"]
-    resources: ["volumesnapshots/status"]
+    resources: ["volumesnapshotcontents/status"]
     verbs: ["update"]
-  - apiGroups: ["apiextensions.k8s.io"]
-    resources: ["customresourcedefinitions"]
-    verbs: ["create", "list", "watch", "delete"]
-
 ---
 kind: ClusterRoleBinding
 apiVersion: rbac.authorization.k8s.io/v1

manifests/cinder-csi-plugin/cinder-csi-controllerplugin.yaml

@@ -59,7 +59,7 @@ spec:
             - name: socket-dir
               mountPath: /var/lib/csi/sockets/pluginproxy/
         - name: csi-snapshotter
-          image: quay.io/k8scsi/csi-snapshotter:v1.2.2
+          image: quay.io/k8scsi/csi-snapshotter:v2.1.1
           args:
             - "--csi-address=$(ADDRESS)"
           env: