Hi, In my previous mail I have indicated the link to website of Kashyap that provides the sequence for cold snapshot and not live snapshot.
Could you try the sequence specified in comment ‘Kashyap Chamarthy (kashyapc)<https://launchpad.net/~kashyapc> wrote on 2014-06-27’ in [1] ? Libvirt API equivalent of virsh managedsave is not something that is used in live snapshot according to that (I haven’t checked source code myself) BR, Konstantin [1] https://bugs.launchpad.net/nova/+bug/1334398 From: Michael Stang [mailto:michael.st...@dhbw-mannheim.de] Sent: Thursday, August 25, 2016 8:48 AM To: Volenbovskyi Kostiantyn, INI-ON-FIT-CXD-ELC <kostiantyn.volenbovs...@swisscom.com>; Saverio Proto <ziopr...@gmail.com> Cc: openstack-operators@lists.openstack.org Subject: RE: [Openstack-operators] Mitaka live snapshot of instances not working Hi Konstantin, hi Saverio thank you for your answers. I checked the version, these are libvirt 1.3.1-1ubuntu10.1~cloud0 qemu 1:2.5+dfsg-5ubuntu10.2~cloud0 at our installation, system is Ubuntu 14.04. I tried also the following from [2] Command: nova image-create test "snap_of_test" --poll Result: Server snapshotting... 25% completeERROR (NotFound): Image not found. (HTTP 404) Then I started trying step by step as in [2] but failed at the first step already: Command: virsh managedsave instance-00000367 Result: error: Failed to save domain instance-00000367 state error: internal error: unable to execute QEMU command 'migrate': Migration disabled: failed to allocate shared memory I also checked on the compute nodes the directories: /var/lib/libvirt/qemu/save/ /var/lib/nova/instances/snapshots/ there is 257G free space and the instance only has 1GB root disk, so I think its not missing space. So is this maybe a problem with qemu? How can i enable 'migrate' and why is it disabled? Thank you for your help. Kind regards, Michael > kostiantyn.volenbovs...@swisscom.com<mailto:kostiantyn.volenbovs...@swisscom.com> > hat am 24. August 2016 um 14:51 geschrieben: > > > 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.st...@dhbw-mannheim.de] > Sent: Wednesday, August 24, 2016 9:55 AM > To: openstack-operators > <openstack-operators@lists.openstack.org<mailto:openstack-operators@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.st...@dhbw-mannheim.de<mailto:michael.st...@dhbw-mannheim.de> > http://www.dhbw-mannheim.de > > > > Viele Grüße 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 Tel.: +49 (0)621 4105 - 1367 michael.st...@dhbw-mannheim.de<mailto:michael.st...@dhbw-mannheim.de> http://www.dhbw-mannheim.de [http://www.dhbw-mannheim.de/fileadmin/media/mail/signatur/dhbw_logo_mail.jpg]
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