Hi Lukaz,

Backup using the new incremental backup API is supported only for running VMs.

On Thu, 8 Oct 2020 at 12:36, Łukasz Kołaciński <l.kolacinski@storware.eu> wrote:

Hello,

While trying to backup stopped VM (with POST on /ovirt-engine/api/vms/b79b34c0-d8db-43e5-916e-5528ff7bcfbe/backups) I got the response:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<fault>

<detail>[Cannot backup VM. The Virtual Machine should be in Up status.]</detail>

<reason>Operation Failed</reason>

</fault>

I found here: https://www.ovirt.org/develop/release-management/features/storage/incremental-backup.html that it should be possible to back up a virtual machine that is not running.

"If the VM is not running, the system will create a paused, stripped-down version of the VM, with only backup disks attached, and use libvirt API to start and stop the backup."

If you will read until the end of the paragraph you will see that the support for this deferred at this time-

We considered alternative solution using qemu-nbd, but According to Eric Blake qemu-nbd does not support yet exposing bitmap info, so we would not be able to provide the change block list.

Since creating special paused VM for backing up non-running VM is a lot of work, we may defer support for backing up non-running VMs.

But it doesn't seem to work.

Regards,

Łukasz Kołaciński

Junior Java Developer

e-mail: l.kolacinski@storware.eu

ul. Leszno 8/44
01-192 Warszawa
www.storware.eu

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Regards,

Eyal Shenitzky