Prerequisites

Ensure that you meet the prerequisites before you work with Backup & Restore service.

Install either the Backup & Restore or Backup & Restore Agent service. For the procedure to install, see Backup & Restore.
Ensure that you define a StorageClass that is provisioned by a supported CSI driver. Check the provisioner: in the Spec to make sure that it is backed by CSI.
Sample StorageClass:
```
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ocs-storagecluster-cephfs
provisioner: openshift-storage.cephfs.csi.ceph.com
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: Immediate
```
Note: The Storage Class must have the CSI Snapshot capability (VolumeSnapshotClass).
For backups to run successfully, ensure that in all platforms, the Backup & Restore (Legacy) and Backup & Restore services are only supported with CSI compliant storage classes that has volumeBindingMode: Immediate.

Ensure that the VolumeSnapshotClass has a driver: that matches the provisioner: in the StorageClass.

Sample YAML for Red Hat® OpenShift® Data Foundation RBD storage:


apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotClass
driver: openshift-storage.cephfs.csi.ceph.com
metadata:
  name: ocs-storagecluster-cephfsplugin-snapclass
deletionPolicy: Delete
parameters:
  clusterID: openshift-storage
  csi.storage.k8s.io/snapshotter-secret-name: rook-csi-cephfs-provisioner
  csi.storage.k8s.io/snapshotter-secret-namespace: openshift-storage

Note: If you plan to create and use your own storage classes in IBM Storage Fusion HCI System, ensure that you have the VolumeSnapshotClass.