Overall Status

Volume snapshotting has been a GA feature since Kubernetes v1.20.

Supported CSI Spec Versions

1.0-1.5

Minimum Kubernetes version

1.20

Recommended Kubernetes version

1.20+

Container

docker pull k8s.gcr.io/sig-storage/snapshot-controller:v4.2.0
docker pull k8s.gcr.io/sig-storage/csi-snapshotter:v4.2.0
docker pull k8s.gcr.io/sig-storage/snapshot-validation-webhook:v4.2.0

Feature

Snapshot APIs

• The namespace of the referenced VolumeSnapshot is printed when printing a VolumeSnapshotContent. (#535, @tsmetana)

Snapshot Controller

• retry-interval-start and retry-interval-max arguments are added to common-controller which controls retry interval of failed volume snapshot creation and deletion. These values set the ratelimiter for snapshot and content queues. (#530, @humblec)
• Add command line arguments leader-election-lease-duration, leader-election-renew-deadline, and leader-election-retry-period to configure leader election options for the snapshot controller. (#575, @bertinatto)
• Adds an operations_in_flight metric for determining the number of snapshot operations in progress. (#519, @ggriffiths)
• Introduced "SnapshotCreated" and "SnapshotReady" events. (#540, @rexagod)

CSI Snapshotter Sidecar

• retry-interval-start and retry-interval-max arguments are added to csi-snapshotter sidecar which controls retry interval of failed volume snapshot creation and deletion. These values set the ratelimiter for volumesnapshotcontent queue. (#308, @humblec)
• Add command line arguments leader-election-lease-duration, leader-election-renew-deadline, and leader-election-retry-period to configure leader election options for CSI snapshotter sidecar. (#538, @RaunakShah)

Full Changelog

https://github.com/kubernetes-csi/external-snapshotter/blob/v4.2.0/CHANGELOG/CHANGELOG-4.2.md