Volume group snapshots were introduced as an Alpha feature with the Kubernetes 1.27 release and moved to Beta in the Kubernetes 1.32 release. The recent release of Kubernetes v1.34 moved that support to a second beta. The support for volume group snapshots relies on a set of extension APIs for group snapshots. These APIs allow users to take crash consistent snapshots for a set of volumes. Behind the scenes, Kubernetes uses a label selector to group multiple PersistentVolumeClaims for snapshotting.

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Kubernetes

Kubernetes v1.34 moves volume group snapshots to v1beta2, addressing an issue where the restoreSize field wasn't set when CSI drivers don't implement ListSnapshots RPC. The update introduces VolumeSnapshotInfo struct and VolumeSnapshotInfoList to replace VolumeSnapshotHandlePairList, with conversion webhooks handling migration from v1beta1. Volume group snapshots enable crash-consistent snapshots across multiple volumes using label selectors and are targeting general availability in future releases.

Kubernetes v1.34: Moving Volume Group Snapshots to v1beta2