Add tutorial for VolumeSnapshot to docs

site/content/en/docs/tutorials/volume_snapshots_and_csi.md

@@ -15,7 +15,7 @@ This tutorial explains how to set up the CSI Hostpath Driver in minikube and cre
 
 - latest version of minikube
 
-## Tutorial
+## What you’ll need
 
 Support for volume snapshots in minikube is provided through the `volumesnapshots` addon. This addon provisions the required
 CRDs and deploys the Volume Snapshot Controller. It is <b>disabled by default</b>.
@@ -44,3 +44,136 @@ name `hostpath.csi.k8s.io`. Use this wherever necessary (e.g. snapshot class def
 Once both addons are enabled, you can create persistent volumes and snapshots using standard ways (for a quick test of
 volume snapshots, you can find some example yaml files along with a step-by-step [here](https://kubernetes-csi.github.io/docs/snapshot-restore-feature.html)).
 The driver stores all persistent volumes in the `/var/lib/csi-hostpath-data/` directory of minikube's host.
+
+## Tutorial
+
+In this tutorial, you use `volumesnapshots` addon(1) and `csi-hostpath-driver` addon(2a).
+
+<h2 class="step"><span class="fa-stack fa-1x"><i class="fa fa-circle fa-stack-2x"></i><strong class="fa-stack-1x text-primary">1</strong></span>Start your cluster</h2>
+
+```shell
+minikube start
+```
+
+<h2 class="step"><span class="fa-stack fa-1x"><i class="fa fa-circle fa-stack-2x"></i><strong class="fa-stack-1x text-primary">2</strong></span>Enable addons</h2>
+
+Enable `volumesnapshots` and `csi-hostpath-driver` addons:
+
+```shell
+minikube addons enable volumesnapshots
+minikube addons enable csi-hostpath-driver
+```
+
+<h2 class="step"><span class="fa-stack fa-1x"><i class="fa fa-circle fa-stack-2x"></i><strong class="fa-stack-1x text-primary">3</strong></span>Register volume snapshot class</h2>
+
+Before creating volume snapshot, you have to register [Volume Snapshot Classes](https://kubernetes.io/docs/concepts/storage/volume-snapshot-classes/) to your cluster.
+Here is an example `VolumeSnapshotClass` config to register:
+
+```yaml
+# snapshotclass.yaml
+apiVersion: snapshot.storage.k8s.io/v1beta1
+kind: VolumeSnapshotClass
+metadata:
+  name: csi-hostpath-snapclass
+driver: hostpath.csi.k8s.io #csi-hostpath
+deletionPolicy: Delete
+```
+
+```shell
+kubectl apply -f snapshotclass.yaml
+```
+
+<h2 class="step"><span class="fa-stack fa-1x"><i class="fa fa-circle fa-stack-2x"></i><strong class="fa-stack-1x text-primary">4</strong></span>Prepare persistent volume</h2>
+
+Create persistent volume claim to create persistent volume dynamically:
+
+```yaml
+# example-pvc.yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: csi-pvc
+spec:
+  accessModes:
+  - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+  storageClassName: csi-hostpath-sc
+```
+
+```shell
+kubectl apply -f example-pvc.yaml
+```
+
+You can confirm that persistent volume is created by the following command:
+
+```shell
+kubectl get pv
+NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM             STORAGECLASS      REASON   AGE
+pvc-388c33e2-de56-475c-8dfd-4990d5f7a640   1Gi        RWO            Delete           Bound    default/csi-pvc   csi-hostpath-sc            60s
+```
+
+<h2 class="step"><span class="fa-stack fa-1x"><i class="fa fa-circle fa-stack-2x"></i><strong class="fa-stack-1x text-primary">5</strong></span>Take a volume snapshot</h2>
+
+You can take a volume snapshot for persistent volume claim:
+
+```yaml
+# example-csi-snapshot.yaml
+apiVersion: snapshot.storage.k8s.io/v1beta1
+kind: VolumeSnapshot
+metadata:
+  name: snapshot-demo
+spec:
+  volumeSnapshotClassName: csi-hostpath-snapclass
+  source:
+    persistentVolumeClaimName: csi-pvc
+```
+
+```shell
+kubectl apply -f example-csi-snapshot.yaml
+```
+
+You could get volume snapshot. You can confirm your volume snapshot by the following command:
+
+```shell
+kubectl get volumesnapshot
+NAME                AGE
+snapshot-demo       2m19s
+```
+
+<h2 class="step"><span class="fa-stack fa-1x"><i class="fa fa-circle fa-stack-2x"></i><strong class="fa-stack-1x text-primary">6</strong></span>Restore from volume snapshot</h2>
+
+You can restore persistent volume from your volume snapshot:
+
+```yaml
+# example-csi-restore.yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: csi-pvc-restore
+spec:
+  storageClassName: csi-hostpath-sc
+  dataSource:
+    name: snapshot-demo
+    kind: VolumeSnapshot
+    apiGroup: snapshot.storage.k8s.io
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+```
+
+```shell
+kubectl apply -f example-csi-restore.yaml
+```
+
+You can confirm that persistent volume claim is created from `VolumeSnapshot`:
+
+```shell
+kubectl get pvc
+NAME              STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
+csi-pvc           Bound    pvc-388c33e2-de56-475c-8dfd-4990d5f7a640   1Gi        RWO            csi-hostpath-sc   23m
+csi-pvc-restore   Bound    pvc-496bab30-9bd6-4abb-94e9-d2e9e1c8f210   1Gi        RWO            csi-hostpath-sc   26s
+```