Working with volume snapshots

Cluster administrators can use volume snapshots to help protect against data loss by using the supported {microshift-short} logical volume manager storage (LVMS) Container Storage Interface (CSI) provider. Familiarity with persistent volumes is required.

A snapshot represents the state of the storage volume in a cluster at a particular point in time. Volume snapshots can also be used to provision new volumes. Snapshots are created as read-only logical volumes (LVs) located on the same device as the original data.

A cluster administrator can complete the following tasks using CSI volume snapshots:

Create a snapshot of an existing persistent volume claim (PVC).
Back up a volume snapshot to a secure location.
Restore a volume snapshot as a different PVC.
Delete an existing volume snapshot.

Important

Only the logical volume manager storage (LVMS) plugin CSI driver is supported by {microshift-short}.

Additional resources

Understanding persistent volumes
Configuring and managing logical volumes
CSI snapshots: VolumeSnapshot APIs
VolumeSnapshot API specification

modules/microshift-lvm-thin-volumes.adoc

Additional resources

To create a thin pool on the host, see Creating and managing thin provisioned volumes
Creating thinly provisioned logical volumes
Configuring and managing thin provisioned volumes
Storage classes
Storage device classes