Create Snapshots

About this task

A Volume Snapshot Class enables the creation of snapshots for PVCs, allowing efficient backups and data restoration. This functionality ensures data protection, facilitating point-in-time recovery, and minimizing the risk of data loss in Kubernetes clusters.

The procedure below demonstrates how to create a Volume Snapshot Class and Volume Snapshot for the Dell CSI provisioner.

Note

It is necessary to have the CSI controller running to be able to create and mount the PVC.

Note

The Dell-storage CSIs charts already create default snapshotclasses. You can list them by using the following command:

~(keystone_admin)$ kubectl get volumesnapshotclasses.snapshot.storage.k8s.io

Procedure

CSI-Powerstore is used in this example.

1. Check if the Dell-storage application is successfully applied.

   ~(keystone_admin)$ system application-list
   +--------------------------+-----------+-------------------------------------------+------------------+--------------+-----------+
   | application              | version   | manifest name                             | manifest file    | status       | progress  |
   +--------------------------+-----------+-------------------------------------------+------------------+--------------+-----------+
   | dell-storage             | 24.03-36  | dell-storage-fluxcd-manifests             | fluxcd-manifests | applied      | completed |
   +--------------------------+-----------+-------------------------------------------+------------------+--------------+-----------+
   

2. Check if the PVC is created and bound.

   ~(keystone_admin)$ kubectl get -n dell-storage pvc
   NAME    STATUS   VOLUME                          CAPACITY   ACCESS MODES   STORAGECLASS         AGE
   pvol0   Bound    csi-powerstore-vol-0fca78f7dd   8Gi        RWO            csi-powerstore-nfs   5m
   

3. Check the available snapshot classes.

   ~(keystone_admin)$ kubectl get volumesnapshotclasses.snapshot.storage.k8s.io
   NAME                           DRIVER                       DELETIONPOLICY   AGE
   csi-powerstore-snapshot        csi-powerstore.dellemc.com   Delete           5m
   

4. Create the PVC snapshot file and apply it.

   ~(keystone_admin)$ cat << EOF > ~/powerstore-volume-snapshot.yaml
   apiVersion: snapshot.storage.k8s.io/v1
   kind: VolumeSnapshot
   metadata:
   name: csi-powerstore-pvc-snapshot
   namespace: dell-storage
   spec:
   volumeSnapshotClassName: csi-powerstore-snapshot
   source:
      persistentVolumeClaimName: pvol0
   EOF
   
   ~(keystone_admin)$ kubectl apply -f ~/powerstore-volume-snapshot.yaml
   volumesnapshot.snapshot.storage.k8s.io/csi-powerstore-pvc-snapshot created
   

5. Confirm that the PVC snapshot file was created successfully.

   ~(keystone_admin)$ kubectl get volumesnapshots.snapshot.storage.k8s.io
   NAME                         READYTOUSE  SOURCEPVC  SOURCESNAPSHOTCONTENT RESTORESIZE SNAPSHOTCLASS             SNAPSHOTCONTENT             CREATIONTIME  AGE
   csi-powerstore-pvc-snapshot  true        pvol0                            8Gi         csi-powerstore-snapshot   snapcontent-dcfdbb32-       13s           21s
                                                                                                                    c936-469e-aa01-abe59f574fd1