[ovirt-users] Ovirt snapshot failing on one VM
Dafna Ron
dron at redhat.com
Tue Apr 22 16:51:51 UTC 2014
it's the same error:
c1d7c4e-392b-4a62-9836-3add1360a46d::DEBUG::2014-04-22
12:13:44,340::volume::1058::Storage.Misc.excCmd::(createVolume) FAILED:
<err> =
'/rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/4
66d9ae9-e46a-46f8-9f4b-964d8af0675b/0b2d15e5-bf4f-4eaf-90e2-f1bd51a3a936: error
while creating qcow2: No such file or directory\n'; <rc> = 1
were these 23 snapshots created any way each time we fail to create the
snapshot or are these older snapshots which you actually created before
the failure?
at this point my main theory is that somewhere along the line you had
some sort of failure in your storage and from that time each snapshot
you create will fail.
if the snapshots are created during the failure can you please delete
the snapshots you do not need and try again?
There should not be a limit on how many snapshots you can have since
it's only a link changing the image the vm should boot from.
Having said that, it's not ideal to have that many snapshots and can
probably lead to unexpected results so I would not recommend having that
many snapshots on a single vm :)
for example, my second theory would be that because we have so many
snapshots we have some sort of race where part of the createVolume
command expects some result from a query run before the create itself
and because there are so many snapshots there is "no such file" on the
volume because it's too far up the list.
can you also run: ls -l
/rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b
lets see what images are listed under that vm.
btw, you know that your export domain is getting
StorageDomainDoesNotExist in the vdsm log? is that domain in up state?
can you try to deactivate the export domain?
Thanks,
Dafna
On 04/22/2014 05:20 PM, Steve Dainard wrote:
> Ominous..
>
> 23 snapshots. Is there an upper limit?
>
> Offline snapshot fails as well. Both logs attached again (snapshot
> attempted at 12:13 EST).
>
> *Steve *
>
> On Tue, Apr 22, 2014 at 11:20 AM, Dafna Ron <dron at redhat.com
> <mailto:dron at redhat.com>> wrote:
>
> are you able to take an offline snapshot? (while the vm is down)
> how many snapshots do you have on this vm?
>
>
> On 04/22/2014 04:19 PM, Steve Dainard wrote:
>
> No alert in web ui, I restarted the VM yesterday just in case,
> no change. I also restored an earlier snapshot and tried to
> re-snapshot, same result.
>
> *Steve
> *
>
>
>
> On Tue, Apr 22, 2014 at 10:57 AM, Dafna Ron <dron at redhat.com
> <mailto:dron at redhat.com> <mailto:dron at redhat.com
> <mailto:dron at redhat.com>>> wrote:
>
> This is the actual problem:
>
> bf025a73-eeeb-4ac5-b8a9-32afa4ae482e::DEBUG::2014-04-22
>
> 10:21:49,374::volume::1058::Storage.Misc.excCmd::(createVolume)
> FAILED: <err> =
>
> '/rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/4
>
> 66d9ae9-e46a-46f8-9f4b-964d8af0675b/87efa937-b31f-4bb1-aee1-0ee14a0dc6fb:
> error while creating qcow2: No such file or directory\n';
> <rc> = 1
>
> from that you see the actual failure:
>
> bf025a73-eeeb-4ac5-b8a9-32afa4ae482e::ERROR::2014-04-22
> 10:21:49,392::volume::286::Storage.Volume::(clone)
> Volume.clone:
> can't clone:
>
> /rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d
>
> 9ae9-e46a-46f8-9f4b-964d8af0675b/1a67de4b-aa1c-4436-baca-ca55726d54d7
> to
>
> /rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b/87efa937-b31f-4bb1-aee1-0ee1
> 4a0dc6fb
> bf025a73-eeeb-4ac5-b8a9-32afa4ae482e::ERROR::2014-04-22
> 10:21:49,392::volume::508::Storage.Volume::(create)
> Unexpected error
> Traceback (most recent call last):
> File "/usr/share/vdsm/storage/volume.py", line 466, in
> create
> srcVolUUID, imgPath, volPath)
> File "/usr/share/vdsm/storage/fileVolume.py", line 160,
> in _create
> volParent.clone(imgPath, volUUID, volFormat, preallocate)
> File "/usr/share/vdsm/storage/volume.py", line 287, in clone
> raise se.CannotCloneVolume(self.volumePath, dst_path,
> str(e))
> CannotCloneVolume: Cannot clone volume:
>
> 'src=/rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b/1a67de4b-aa1c-4436-baca-ca55726d54d7,
> dst=/rhev/data-cen
>
> ter/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b/87efa937-b31f-4bb1-aee1-0ee14a0dc6fb:
> Error creating a new volume: (["Formatting
> \'/rhev/data-center/9497ef2c-8368-
>
> 4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b/87efa937-b31f-4bb1-aee1-0ee14a0dc6fb\',
> fmt=qcow2 size=21474836480
>
> backing_file=\'../466d9ae9-e46a-46f8-9f4b-964d8af0675b/1a67de4b-aa
> 1c-4436-baca-ca55726d54d7\' backing_fmt=\'qcow2\'
> encryption=off
> cluster_size=65536 "],)'
>
>
> do you have any alert in the webadmin to restart the vm?
>
> Dafna
>
>
> On 04/22/2014 03:31 PM, Steve Dainard wrote:
>
> Sorry for the confusion.
>
> I attempted to take a live snapshot of a running VM. After
> that failed, I migrated the VM to another host, and
> attempted
> the live snapshot again without success, eliminating a
> single
> host as the cause of failure.
>
> Ovirt is 3.3.4, storage domain is gluster 3.4.2.1, OS is
> CentOS 6.5.
>
> Package versions:
> libvirt-0.10.2-29.el6_5.5.x86_64
> libvirt-lock-sanlock-0.10.2-29.el6_5.5.x86_64
> qemu-img-rhev-0.12.1.2-2.415.el6.nux.3.x86_64
> qemu-kvm-rhev-0.12.1.2-2.415.el6.nux.3.x86_64
> qemu-kvm-rhev-tools-0.12.1.2-2.415.el6.nux.3.x86_64
> vdsm-4.13.3-4.el6.x86_64
> vdsm-gluster-4.13.3-4.el6.noarch
>
>
> I made another live snapshot attempt at 10:21 EST
> today, full
> vdsm.log attached, and a truncated engine.log.
>
> Thanks,
>
> *Steve
> *
>
>
>
> On Tue, Apr 22, 2014 at 9:48 AM, Dafna Ron
> <dron at redhat.com <mailto:dron at redhat.com>
> <mailto:dron at redhat.com <mailto:dron at redhat.com>>
> <mailto:dron at redhat.com <mailto:dron at redhat.com>
>
> <mailto:dron at redhat.com <mailto:dron at redhat.com>>>> wrote:
>
> please explain the flow of what you are trying to
> do, are you
> trying to live migrate the disk (from one storage to
> another), are
> you trying to migrate the vm and after vm migration is
> finished
> you try to take a live snapshot of the vm? or are you
> trying to
> take a live snapshot of the vm during a vm
> migration from
> host1 to
> host2?
>
> Please attach full vdsm logs from any host you are
> using
> (if you
> are trying to migrate the vm from host1 to host2)
> + please
> attach
> engine log.
>
> Also, what is the vdsm, libvirt and qemu versions,
> what ovirt
> version are you using and what is the storage you
> are using?
>
> Thanks,
>
> Dafna
>
>
>
>
> On 04/22/2014 02:12 PM, Steve Dainard wrote:
>
> I've attempted migrating the vm to another
> host and
> taking a
> snapshot, but I get this error:
>
>
> 6efd33f4-984c-4513-b5e6-fffdca2e983b::ERROR::2014-04-22
> 01:09:37,296::volume::286::Storage.Volume::(clone)
> Volume.clone: can't clone:
>
> /rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b/1a67de4b-aa1c-4436-baca-ca55726d54d7
> to
>
> /rhev/data-center/9497ef2c-8368-4c92-8d61-7f318a90748f/95b9d922-4df7-4d3b-9bca-467e2fd9d573/images/466d9ae9-e46a-46f8-9f4b-964d8af0675b/b230596f-97bc-4532-ba57-5654fa9c6c51
>
> A bit more of the vdsm log is attached.
>
> Other vm's are snapshotting without issue.
>
>
>
> Any help appreciated,
>
> *Steve
> *
>
>
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>
>
>
> -- Dafna Ron
>
>
>
>
> -- Dafna Ron
>
>
>
>
> --
> Dafna Ron
>
>
--
Dafna Ron
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