VM Clone

A VM clone is a copy of a virtual machine. After the cloning operation, the clone VM runs as a separate virtual machine.

The clone.kubevirt.io API Group defines resources for cloning KubeVirt VMs.

Creating a VM Clone

Under the hood, the clone API relies upon Snapshot & Restore APIs. Therefore, in order to be able to use the clone API, please see VM Snapshot & Restore pre-requisites.

In order to initiate cloning, a VirtualMachineClone object (CRD) needs to be created on the cluster. An example for such an object is:

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kind: VirtualMachineClone

apiVersion: "clone.kubevirt.io/v1alpha1"

metadata:

  name: clone-fedora-1

spec:

  # source & target definitions

  source:

    apiGroup: kubevirt.io

    kind: VirtualMachine

    name: fedora-vm-1

  target:

    apiGroup: kubevirt.io

    kind: VirtualMachine

    name: fedora-vm-1-clone

Apply it and see the clone progress:

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kubectl get vmclone -w

NAME             PHASE                SOURCEVIRTUALMACHINE   TARGETVIRTUALMACHINE

clone-fedora-1                        fedora-vm-1            fedora-vm-1-clone

clone-fedora-1   SnapshotInProgress   fedora-vm-1            fedora-vm-1-clone

clone-fedora-1   RestoreInProgress    fedora-vm-1            fedora-vm-1-clone

clone-fedora-1   Succeeded            fedora-vm-1            fedora-vm-1-clone

Source & Target

The source and target indicate the source/target API group, kind and name. A few important notes:

• Currently, the only supported kinds are VirtualMachine (of kubevirt.io api group) and VirtualMachineSnapshot ( of snapshot.kubevirt.io api group), but more types are expected to be supported in the future. See "future roadmap" below for more info.
• The target name is optional. If unspecified, the clone controller will generate a name for the target automatically.
• The target and source must reside in the same namespace.