Authors:

avatar of Tomas Jelinek

Tomas Jelinek

Feature pages are design documents that developers have created while collaborating on oVirt.

Most of them are outdated, but provide historical design context.

They are not user documentation and should not be treated as such.

Documentation is available here.

Clone VM

Summary

Allow to simply and directly clone the VM.

Owner

Current status

  • Target Release: 3.6
  • Status: done

Background

Up until now there were the following ways to create a copy of a VM:

  • Make a template, make a new VM from this template
  • Make a snapshot and clone the snapshot

It would be useful to provide a way to clone a VM directly.

Implementation

All the logic is implemented in the CloneVmCommand class. Since it is very similar to cloning a VM from a snapshot, the common logic between the CloneVmCommand and AddVmFromSnapshotComman has been extracted to the common AddVmAndCloneImageCommand base class.

Frontend

As shown in the following picture a new action button called “Clone VM” has been added to webadmin/userportal virtual machines tab:

When clicked, a new window will be opened containing only the new name of the VM:

After clicking OK the clone of the VM will be made.

REST API

A new action has been created on the VM called “clone”. It takes only one parameter in the request body, the name. To clone a VM using the REST API send a POST request to: <engineUrl>/api/vms/<vm id>/clone

with body containing:

<action> <vm> <name>newName</name> </vm> </action>

Testing

Test Case 1

  • Have a VM with no disks
  • Clone the VM
  • Verify the new VM has no disks
  • Verify all the parameters of the VM have been cloned

Test Case 2

  • Have a VM with one disk
  • Clone the VM
  • Verify the new VM has one disk
  • Verify all the parameters of the VM have been cloned

Test Case 3

  • Have a VM with two disks
  • Clone the VM
  • Verify the new VM has two disks
  • Verify all the parameters of the VM have been cloned

Test Case 4

  • Have a VM with an attached shared disk
  • Clone the VM
  • Verify the new VM has the disk attached as well