ci: add volumesnapshotclasses for externalstorage

added volumesnapshotclasses yaml and script for
external-storage test

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

scripts/k8s-storage/README.md

@@ -5,9 +5,13 @@ This job runs the [Kubernetes end-to-end external storage tests][1] with
 different driver configurations/manifests (in the `driver-*.yaml` files). Each
 driver configuration refers to a StorageClass that is used while testing.
 
-The StorageClasses are created with the `create-storageclass.sh` script and the
+The StorageClasses are created with the `create-storageclasses.sh` script and the
 `sc-*.yaml.in` templates.
 
+The VolumeSnapshotClasses are created with the
+`create-volumesnapshotclasses.sh` script and the
+`volumesnapshotclass-*.yaml.in` templates.
+
 The Ceph-CSI Configuration from the `ceph-csi-config` ConfigMap is created with
 `create-configmap.sh` after the deployment is finished. The ConfigMap is
 referenced in the StorageClasses and contains the connection details for the

scripts/k8s-storage/create-volumesnapshotclasses.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Create VolumeSnapshotClasses from a template (volumesnapshotclass-*.yaml.in) and replace keywords
+# like @@CLUSTER_ID@@.
+#
+# These VolumeSnapshotClasses can then be used by driver-*.yaml manifests in the
+# k8s-e2e-external-storage CI job.
+#
+# Requirements:
+# - kubectl in the path
+# - working KUBE_CONFIG either in environment, or default config files
+# - deployment done with Rook
+#
+
+# exit on error
+set -e
+
+WORKDIR=$(dirname "${0}")
+
+TOOLBOX_POD=$(kubectl -n rook-ceph get pods --no-headers -l app=rook-ceph-tools -o=jsonpath='{.items[0].metadata.name}')
+FS_ID=$(kubectl -n rook-ceph exec "${TOOLBOX_POD}" -- ceph fsid)
+
+for sc in "${WORKDIR}"/volumesnapshotclass-*.yaml.in
+do
+	sed "s/@@CLUSTER_ID@@/${FS_ID}/" "${sc}" |
+		kubectl create -f -
+done

scripts/k8s-storage/volumesnapshotclass-cephfs.yaml.in

@@ -0,0 +1,11 @@
+---
+apiVersion: snapshot.storage.k8s.io/v1
+kind: VolumeSnapshotClass
+metadata:
+  name: k8s-storage-e2e-cephfs
+driver: cephfs.csi.ceph.com
+parameters:
+  clusterID: @@CLUSTER_ID@@
+  csi.storage.k8s.io/snapshotter-secret-name: rook-csi-cephfs-provisioner
+  csi.storage.k8s.io/snapshotter-secret-namespace: rook-ceph
+deletionPolicy: Delete