Red Hat build of MicroShift

Volume snapshot classes

To enable dynamic snapshotting in LVMS, ensure that at least one VolumeSnapshotClass configuration file is present on the node. This resource defines the Container Storage Interface (CSI) parameters required to create and manage volume snapshots.

You must enable thin logical volumes to take logical volume snapshots.

Example VolumeSnapshotClass configuration file

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotClass
metadata:
  name: topolvm-snapclass
  annotations:
    snapshot.storage.kubernetes.io/is-default-class: "true"
driver: topolvm.io
deletionPolicy: Delete

where:

snapshot.storage.kubernetes.io/is-default-class: Specifies the VolumeSnapshotClass configuration file to use when none is specified by VolumeSnapshot. Where VolumeSnapshot is a request for snapshot of a volume by a user.
driver: Identifies the snapshot provisioner that manages the requests for snapshots of a volume by a user for this class.
deletionPolicy: Specifies the VolumeSnapshotContent objects and the backing snapshots that are kept or deleted when a bound VolumeSnapshot is deleted. Valid values are Retain or Delete.