Volume snapshot does not work

Created by: matofeder

Desired state

As a KaaS user, I want to create a volume-snapshot as is described e.g. here

Current state

The volume snapshot feature is not working in the workload clusters managed by the latest (R4) version of k8s-cluster-api-provider (with the default settings, i.e. k8s version v1.25.x)

Steps to reproduce

1. Create a workload cluster by the k8s-cluster-api-provider
   • use default settings ( i.e. k8s version v1.25.x)
2. Create PVC and its snapshot (well described e.g. in this example)
3. K8s objects volumesnapshotcontents.snapshot.storage.k8s.io and volumesnapshots.snapshot.storage.k8s.io are not created and volume snapshot is not created as well

Reason

Currently, the script apply_cindercsi.sh wants to enable this feature with the deployment of related snapshot CRDs here.

Since Kubernetes version 1.17, the CSI external-snapshotter sidecar (sidecar deployed together with CSI cinder driver) controller has been split into two controllers: a snapshot-controller (an independent controller of any CSI Driver) and a CSI external-snapshotter sidecar (sidecar deployed together with CSI cinder driver).

Therefore the snapshot-controller should be deployed as well as part of k8s cluster management process to enable the volume snapshot feature in the k8s cluster.

Posible solution

Update the apply_cindercsi.sh script and deploy the snapshot-controller as is described e.g. here