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containerized-data-importer/doc/clone-block-datavolume.md
Michael Henriksen 9e2c79b1e0
move api groups to v1beta1 (#1232) 
* move upload.cdi.kubevirt.io API group to v1beta1

Signed-off-by: Michael Henriksen <mhenriks@redhat.com>

* move core api to v1beta1

Signed-off-by: Michael Henriksen <mhenriks@redhat.com>

* fix os-3.11 cluster sync and add functional tests for alpha api

Signed-off-by: Michael Henriksen <mhenriks@redhat.com>

* change more occurences of v1alpha1

Signed-off-by: Michael Henriksen <mhenriks@redhat.com>

* updates after rebase

Signed-off-by: Michael Henriksen <mhenriks@redhat.com>
2020-07-10 15:47:38 +02:00

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How to clone an image from one block raw PV to another one

The purpose of this document is to show how to clone an image from an existing raw block PV, to another target block PV.

Prerequisites

  • You have a Kubernetes cluster up and running with CDI installed, block source PVC, and at least one available block PersistentVolume to store the cloned disk image.
  • Feature-Gate 'BlockVolume' is enabled.

Clone an image with DataVolume manifest

Create the following DataVolume manifest (clone-block-datavolume.yaml):

apiVersion: cdi.kubevirt.io/v1beta1
kind: DataVolume
metadata:
  name: clone-block-datavolume
spec:
  source:
    pvc:
      namespace: "source-ns"
      name: "source-datavolume"
  pvc:
    volumeMode: Block
    accessModes:
      - ReadWriteOnce
    resources:
      requests:
        storage: 1Gi

Deploy the DataVolume manifest:

kubectl create -f clone-block-pv-datavolume.yaml

Two cloning pods, source and target, will be spawned and the image existed on the source block PV, will be copied to the target block PV.