Hello, what is the size of the RAM for the flavor of the instance you are trying to snapshotting ?
thank you Saverio 2016-08-25 8:48 GMT+02:00 Michael Stang <michael.st...@dhbw-mannheim.de>: > 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 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> > > 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 > > 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 > http://www.dhbw-mannheim.de > > > > > >
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