Volume Restore from Snapshot

Volume restore from an existing snapshot will create an exact replica of a storage volume 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 StorageClass

To begin, you will need to create a StorageClass that defines the properties of the snapshot to be restored. Refer to StorageClass Parameters for more details. Use the following command to create the StorageClass:

info

thin: "true" and repl: "1" is the only supported combination.

Command

cat <<EOF | kubectl create -f -

apiVersion: storage.k8s.io/v1

kind: StorageClass

metadata:

name: mayastor-1-restore

parameters:

protocol: nvmf

repl: "1"

thin: "true"

provisioner: io.openebs.csi-mayastor

EOF

YAML

apiVersion: storage.k8s.io/v1

kind: StorageClass

metadata:

name: mayastor-1-restore

parameters:

protocol: nvmf

repl: "1"

thin: "true"

provisioner: io.openebs.csi-mayastor

note

The name of the StorageClass, which, in the example above, 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 to create a volume snapshot.

note

Tthe 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:

Command

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

YAML

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

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.