Hi, thank you for the link. I tried this method and get the following result:
virsh dumpxml --inactive instance-00000367 > /var/tmp/instance-00000367.xml virsh blockjob instance-00000367 vda --abort error: Requested operation is not valid: No active operation on device: drive-virtio-disk0 virsh blockcopy --domain instance-00000367 vda /var/tmp/instance-00000367-copy.qcow2 --wait -- verbose error: internal error: unable to execute QEMU command 'drive-mirror': Could not create file: Permission denied virsh blockjob instance-00000367 vda --abort error: Requested operation is not valid: No active operation on device: drive-virtio-disk0 virsh define /var/tmp/instance-00000367.xml Domain instance-00000367 defined from /var/tmp/instance-00000367.xml The last command I ccould not do, because I got no image with the 3rd command. I tried it as user and also as root, also tired different directories to write the image to (//var/tmp/, /tmp, ~/ ) Kind regards, Michael > [email protected] hat am 25. August 2016 um 14:27 > geschrieben: > > > 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:[email protected]] > Sent: Thursday, August 25, 2016 8:48 AM > To: Volenbovskyi Kostiantyn, INI-ON-FIT-CXD-ELC > <[email protected]>; Saverio Proto <[email protected]> > Cc: [email protected] > 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 > > > > > > > > > > > > [email protected] > > mailto:[email protected] 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 > > 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 > > > 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/ > > https://kashyapc.com/2013/03/11/openstack-nova-image-create-under-the-hood/ > > > > > > > > > > > > From: Michael Stang [mailto:[email protected] > > mailto:[email protected] ] > > Sent: Wednesday, August 24, 2016 9:55 AM > > To: openstack-operators <[email protected] > > mailto:[email protected] > > > 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 > > > > > > [email protected] mailto:[email protected] > > 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 > [email protected] mailto:[email protected] > 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 [email protected] http://www.dhbw-mannheim.de _______________________________________________ OpenStack-operators mailing list [email protected] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
