docs(vol-restore): added a doc for volume restore from a snapshot

SUMMARY.md

@@ -23,6 +23,7 @@
 * [Node Cordon](reference/node-cordon.md)
 * [Node Drain](reference/node-drain.md)
 * [Volume Snapshots](reference/snapshot.md)
+* [Volume Restore from Snapshot](reference\snapshot.md)
 
 ## Additional Information
 

reference/snapshot-restore.md

@@ -0,0 +1,110 @@
+---
+Title: Volume Restore from a Snapshot
+---
+
+Volume restore from an existing snapshot will create exact replicas of storage volumes captured at a specific point in time. They serve as an essential tool for data protection, recovery, and efficient management in Kubernetes environments. This article provides a step-by-step guide on how to create a volume restore.
+
+## Prerequisites
+
+### Step 1: Create a storage class 
+
+To begin, you'll need to create a StorageClass that defines the properties of the snapshot to be restored. Refer to [Storage Class Parameters](reference\storage-class-parameters.md) for more details. Use the following command to create the StorageClass:
+
+{% hint style="info" %}
+thin: "true" and repl: "1" is the only supported combination.
+{% endhint %}
+
+{% tabs %}
+{% tab title="Command" %}
+```text
+cat <<EOF | kubectl create -f -
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: mayastor-1-restore
+parameters:
+  ioTimeout: "30"
+  protocol: nvmf
+  repl: "1"
+  thin: "true"
+provisioner: io.openebs.csi-mayastor
+EOF
+```
+{% endtab %}
+{% tab title="YAML" %}
+```text
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: mayastor-1-restore
+parameters:
+  ioTimeout: "30"
+  protocol: nvmf
+  repl: "1"
+  thin: "true"
+provisioner: io.openebs.csi-mayastor
+```
+{% endtab %}
+{% endtabs %}
+
+> Note the name of the StorageClass, which, in this example, is **mayastor-1-restore**.
+
+
+### Step 2: Create a snapshot 
+
+You need to create a volume snapshot before proceeding with the restore. Follow the steps outlined in [this guide](quickstart/snapshot.md) to create a volume snapshot.
+
+> Note the snapshot's name, for example, **pvc-snap-1**.
+
+-------------------
+
+## Create a volume restore of the existing snapshot
+
+After creating a snapshot, you can create a PersistentVolumeClaim (PVC) from it to generate the volume restore. Use the following command:
+
+{% tabs %}
+{% tab title="Command" %}
+```text
+cat <<EOF | kubectl create -f -
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: restore-pvc //add a name for your new volume
+spec:
+  storageClassName: mayastor-1-restore //add your storage class name 
+  dataSource:
+    name: pvc-snap-1 //add your volumeSnapshot name
+    kind: VolumeSnapshot
+    apiGroup: snapshot.storage.k8s.io
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi
+ EOF     
+ ```
+{% endtab %}
+{% tab title="YAML" %}
+```text
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: restore-pvc //add a name for your new volume
+spec:
+  storageClassName: mayastor-1-restore //add your storage class name 
+  dataSource:
+    name: pvc-snap-1 //add your volumeSnapshot name
+    kind: VolumeSnapshot
+    apiGroup: snapshot.storage.k8s.io
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi
+```
+{% endtab %}
+{% endtabs %}
+
+
+By running this command, you create a new PVC named `restore-pvc` based on the specified snapshot. The restored volume will have the same data and configuration as the original volume had at the time of the snapshot.
+