VolumeSnapshot,VolumeSnapshotClass & VolumeSnapshotContent Support

[Jainbrt]

What is the feature and why do you need it:

Do we have plan to support VolumeSnapshot,VolumeSnapshotClass & VolumeSnapshotContent API?

Describe the solution you'd like to see:

[roycaihw]

It looks like those APIs are CRDs: https://kubernetes.io/docs/concepts/storage/volume-snapshot-classes/#the-volumesnapshotclass-resource

If that's the case, you could use the CustomObject API to send requests to those APIs once they are installed. Example: https://github.com/kubernetes-client/python/blob/master/examples/custom_object.py

[davidspek]

I believe this page is more relevant in regards to VolumeSnapshot, VolumeSnapshotClass & VolumeSnapshotContent being CRDs.
https://kubernetes.io/docs/concepts/storage/volume-snapshots/#introduction

[davidspek]

For those searching for how to create a volume snapshot with the python client, here are 2 code snippets to create a snapshot from a CephFS PVC and to then create a PVC from said snapshot.

Create CephFS snapshot:

co_client = podutils._get_k8s_custom_objects_client()

my_resource = {
    "apiVersion": "snapshot.storage.k8s.io/v1beta1",
    "kind": "VolumeSnapshot",
    "metadata": {"name": "new-snapshot-dev-pvc"},
    "spec": {
        "volumeSnapshotClassName": "csi-cephfsplugin-snapclass",
        "source": {"persistentVolumeClaimName": "workspace-dev"}
    }
}
 # create the resource
co_client.create_namespaced_custom_object(
    group="snapshot.storage.k8s.io",
    version="v1beta1",
    namespace="admin",
    plural="volumesnapshots",
    body=my_resource,
)
print("Snapshot created")

Create CephFS PVC from above snapshot:

co_client = podutils._get_k8s_v1_client()

my_resource = {
    "apiVersion": "v1",
    "kind": "PersistentVolumeClaim",
    "metadata": {"name": "restore-pvc"},
    "spec": {
        "dataSource": {"name": "new-snapshot-dev-pvc", "kind": "VolumeSnapshot", "apiGroup": "snapshot.storage.k8s.io"},
        "accessModes": ["ReadWriteMany"],
        "resources": {
        "requests": {"storage": "10Gi"}
        } 
    }
}
 # create the resource
co_client.create_namespaced_persistent_volume_claim(
    namespace="admin",
    body=my_resource,
)
print("PVC created")

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