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Chapter 12. Volume cloning
A clone is a duplicate of an existing storage volume that is used as any standard volume. You create a clone of a volume to make a point in time copy of the data. A persistent volume claim (PVC) cannot be cloned with a different size. You can create up to 512 clones per PVC for both CephFS and RADOS Block Device (RBD).
12.1. Creating a clone
Prerequisites
-
Source PVC must be in
Boundstate and must not be in use.
Do not create a clone of a PVC if a Pod is using it. Doing so might cause data corruption because the PVC is not quiesced (paused).
Procedure
-
Click Storage
Persistent Volume Claims from the OpenShift Web Console. To create a clone, do one of the following:
-
Beside the desired PVC, click Action menu (⋮)
Clone PVC. -
Click on the PVC that you want to clone and click Actions
Clone PVC.
-
Beside the desired PVC, click Action menu (⋮)
- Enter a Name for the clone.
- Select the access mode of your choice.
- Enter the required size of the clone.
Select the storage class in which you want to create the clone.
The storage class can be any RBD storage class and it need not necessarily be the same as the parent PVC.
- Click Clone. You are redirected to the new PVC details page.
Wait for the cloned PVC status to become
Bound.The cloned PVC is now available to be consumed by the pods. This cloned PVC is independent of its dataSource PVC.
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