Shared content for Kubernetes snapshots - restore PVC from snap

When you install Stork, it also creates a storage class called stork-snapshot-sc. This storage class can be used to create PVCs from snapshots.

To create a PVC from a snapshot, add the snapshot.alpha.kubernetes.io/snapshot annotation to refer to the snapshot name. If the snapshot exists in another namespace, you should specify the snapshot namespace with the stork.libopenstorage.org/snapshot-source-namespace annotation in the PVC.

The Retain policy is important if you need to keep the volume in place, even after removing the Kubernetes objects from a cluster.

note

• As shown in the following example, the storageClassName should be the Stork StorageClass stork-snapshot-sc.
• When using this storage class the PVC is creating with delete as Retain policy. However, if the source PVC is having the policy as retain, then this will not be inherited to the restored PVC. After the restore, you should manually verify the retain policy and change it if needed.

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-snap-clone
  annotations:
    snapshot.alpha.kubernetes.io/snapshot: mysql-snapshot
spec:
  accessModes:
     - ReadWriteOnce
  storageClassName: stork-snapshot-sc
  resources:
    requests:
      storage: 2Gi

Once you apply the above spec, you will see a PVC created by Stork. This PVC will be backed by a Portworx volume clone of the snapshot created above.

oc get pvc

NAMESPACE   NAME                                   STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS                AGE
default     mysql-data                             Bound     pvc-xxxxxxxx-xxxx-xxxx-xxxx-0214683e8447   2Gi        RWO            px-mysql-sc                 2d
default     mysql-snap-clone                       Bound     pvc-xxxxxxxx-xxxx-xxxx-xxxx-0214683e8447   2Gi        RWO            stork-snapshot-sc           2s