Open Stack

> I actually have a card in my trello board to implement live snapshots,
> pointing to this link
> http://www.sebastien-han.fr/blog/2015/02/09/openstack-perform-consistent-snapshots-with-qemu-guest-agent/
>
> However, I haven't tested it yet. If you test it let me know how it goes.

Hello Antonio,

i tried to add to my nova.conf

[workarounds]
disable_libvirt_livesnapshot=False

however it has no effect because I am running Kilo and I have rbd backend.

I found that only since recently live snapshots with rbd backend are possible.

The following patch is in master (and cherry-picked few days ago in Mitaka).

commit 231832354932e26f0d76af1cf1711e701375672b
Author: Nicolas Simonds <nic at metacloud.com>
Date:   Mon Mar 7 14:46:32 2016 -0800

    libvirt: Allow use of live snapshots with RBD snapshot/clone

    The recently merged functionality for making use of RBD snapshot/clone
    when available is very valuable for the Ceph/RBD users out there.
    The new method also makes it possible to do live instance snapshots
    with Ceph/RBD.  However, the current code explicitly forbids it.

    This patch allows the use of live instance snapshots when a RBD
    snapshot/clone is performed directly, and reverts back to cold
    instance snapshot when the old method is used.

    Co-Authored-By: Nicolas Simonds <nic at metacloud.com>
    Change-Id: Ic3a3c73898aa868d6c510639ab12d2401dcb5001
    Closes-Bug: #1539179



Antonio what kind of storage backend are you using ?

Saverio