CSI Volume Clone Support

Creating a new volume as a duplicate of an existing volume

Longhorn supports CSI volume cloning. Suppose that you have the following source-pvc:

  1. apiVersion: v1
  2. kind: PersistentVolumeClaim
  3. metadata:
  4.   name: source-pvc
  5. spec:
  6.   storageClassName: longhorn
  7.   accessModes:
  8.     - ReadWriteOnce
  9.   resources:
  10.     requests:
  11.       storage: 10Gi

You can create a new PVC that has the exact same content as the source-pvc by applying the following yaml file:

  1. apiVersion: v1
  2. kind: PersistentVolumeClaim
  3. metadata:
  4.   name: cloned-pvc
  5. spec:
  6.   storageClassName: longhorn
  7.   dataSource:
  8.     name: source-pvc
  9.     kind: PersistentVolumeClaim
  10.   accessModes:
  11.     - ReadWriteOnce
  12.   resources:
  13.     requests:
  14.       storage: 10Gi

Note: In addition to the requirements listed at CSI volume cloning, the cloned-pvc must have the same resources.requests.storage as the source-pvc.

History

Available since v1.2.0

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