[Openstack-operators] Mitaka live snapshot of instances not working

Kostiantyn.Volenbovskyi at swisscom.com Kostiantyn.Volenbovskyi at swisscom.com
Wed Aug 24 12:51:56 UTC 2016


Hi,
extract from [1] ((side note: I couldn't find that in config reference for Mitaka) is:
"disable_libvirt_livesnapshot = True
(BoolOpt) When using libvirt 1.2.2 live snapshots fail intermittently under load. This config option provides a mechanism to enable live snapshot while this is resolved. See https://bugs.launchpad.net/nova/+bug/1334398"

I am not sure if Nova behaves like that in case you have disable_libvirt_livesnapshot=True (default in Liberty and Mitaka apparently...)
In case it is not about that, then I would try to do it manually using something like [2] as guideline to see if it succeeds using Libvirt/QEMU without Nova.

BR, 
Konstantin
[1] http://docs.openstack.org/liberty/config-reference/content/list-of-compute-config-options.html
[2] https://kashyapc.com/2013/03/11/openstack-nova-image-create-under-the-hood/





From: Michael Stang [mailto:michael.stang at dhbw-mannheim.de] 
Sent: Wednesday, August 24, 2016 9:55 AM
To: openstack-operators <openstack-operators at lists.openstack.org>
Subject: [Openstack-operators] Mitaka live snapshot of instances not working

Hi all,
 
we have a problem in our new mitaka installation, it seems that it is not possible to do a snapshot of a running instance (normal instance without an attached volume). When with try to do a snapshot we get a success message, but the snapshot is only showed shortly in the imagelist with status deleted. I we shutoff the instance and then do a snapshot it is working without problems.
 
When we use a cinder volume as root disk instead an ephermal root disk a volume snapshot could be made without problem in running state of the instance.
 
The same behaviour we have on an other installation of mitaka from our colleagues.
 
Is this behaviour normal in Mitaka or ist this maybe a bug? Because in Juno we could do snapshots from running instances  without problems.
 
 
Regards, 
Michael
 


Michael Stang
Laboringenieur, Dipl. Inf. (FH)

Duale Hochschule Baden-Württemberg Mannheim
Baden-Wuerttemberg Cooperative State University Mannheim
ZeMath Zentrum für mathematisch-naturwissenschaftliches Basiswissen
Fachbereich Informatik, Fakultät Technik
Coblitzallee 1-9
68163 Mannheim


michael.stang at dhbw-mannheim.de
http://www.dhbw-mannheim.de






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