Dear Liam,

You need to upgrade to the latest LTS version of Ubuntu (16.04).

I refer to my message to this mailing list on 17/03/2016:

Hi everybody,

Following this user mailing list over a period of time, I saw a few messages regarding not being able using the external snapshot feature.

I refer to this procedure: http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit

I would like to mention this hoping it will help those users:

Using external snapshots works perfect again in qemu 2.5.0 together with this patch https://bugzilla.redhat.com/show_bug.cgi?id=1300209

Full version list on which I did my testing:

Compiled against library: libvirt 1.3.1

Using library: libvirt 1.3.1

Gebruikte API: QEMU 1.3.1

Draaiende hypervisor: QEMU 2.5.0

Greetings,

Dominique.

Van: libvirt-users-bounces@redhat.com [mailto:libvirt-users-bounces@redhat.com] Namens Liam Curtis
Verzonden: dinsdag 3 mei 2016 17:00
Aan: libvirt-users@redhat.com
Onderwerp: [libvirt-users] Ubuntu 14.04 virsh 1.2.2 blockcommit hangs at 100% / command 'blockcommit' doesn't support option --pivot

Hello All,

I think I have seen this in previous bugs. Trying to live backup qcow2 images. I am able to virsh snapshot-create-as and virsh domblklist shows correct new source, but I am unable to commit back changes to qcow base. I get the above error.

Libvirt at 1.2.2-0ubuntu13.1.17

Qemu is (2.0.0+dfsg-2ubuntu1.22)

I tried compiling latest libvirt, but cannot get it to connect to socket on installed binaries

Anyone get this working on Ubuntu 14.04?