[ovirt-users] Can't remove snapshot

[Greg Padgett]

On 02/09/2016 06:08 AM, Michal Skrivanek wrote:
>
>> On 03 Feb 2016, at 10:37, Rik Theys <Rik.Theys at esat.kuleuven.be> wrote:
>>
>> Hi,
>>
>> In the mean time I've noticed the following entries in our periodic
>> logcheck output:
>>
>> Feb  3 09:05:53 orinoco journal: block copy still active: disk 'vda' not
>> ready for pivot yet
>> Feb  3 09:05:53 orinoco journal: vdsm root ERROR Unhandled
>> exception#012Traceback (most recent call last):#012  File
>> "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 734, in
>> wrapper#012    return f(*a, **kw)#012  File
>> "/usr/share/vdsm/virt/vm.py", line 5168, in run#012
>> self.tryPivot()#012  File "/usr/share/vdsm/virt/vm.py", line 5137, in
>> tryPivot#012    ret = self.vm._dom.blockJobAbort(self.drive.name,
>> flags)#012  File "/usr/share/vdsm/virt/virdomain.py", line 68, in f#012
>>    ret = attr(*args, **kwargs)#012  File
>> "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 124,
>> in wrapper#012    ret = f(*args, **kwargs)#012  File
>> "/usr/lib64/python2.7/site-packages/libvirt.py", line 733, in
>> blockJobAbort#012    if ret == -1: raise libvirtError
>> ('virDomainBlockJobAbort() failed', dom=self)#012libvirtError: block
>> copy still active: disk 'vda' not ready for pivot yet
>>
>> This is from the host running the VM.
>>
>> Note that this host is not the SPM of the cluster. I always thought all
>> operations on disk volumes happened on the SPM host?
>>
>> My question still remains:
>>
>>> I can see the snapshot in the "Disk snapshot" tab of the storage. It has
>>> a status of "illegal". Is it OK to (try to) remove this snapshot? Will
>>> this impact the running VM and/or disk image?
>
> No, it’s not ok to remove it while live merge(apparently) is still ongoing
> I guess that’s a live merge bug?

Indeed, this is bug 1302215.

I wrote a sql script to help with cleanup in this scenario, which you can 
find attached to the bug along with a description of how to use it[1].

However, Rik, before trying that, would you be able to run the attached 
script [2] (or just the db query within) and forward the output to me? I'd 
like to make sure everything looks as it should before modifying the db 
directly.

Thanks,
Greg

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1302215#c13
(Also note that the engine should be stopped before running this.)

[2] Arguments are the ovirt db name, db user, and the name of the vm you 
were performing live merge on.

> Thanks,
> michal
>
>>
>>
>> Regards,
>>
>> Rik
>>
>> On 02/03/2016 10:26 AM, Rik Theys wrote:
>>> Hi,
>>>
>>> I created a snapshot of a running VM prior to an OS upgrade. The OS
>>> upgrade has now been succesful and I would like to remove the snapshot.
>>> I've selected the snapshot in the UI and clicked Delete to start the task.
>>>
>>> After a few minutes, the task has failed. When I click delete again on
>>> the same snapshot, the failed message is returned after a few seconds.
>>>
>>>>  From browsing through the engine log (attached) it seems the snapshot
>>> was correctly merged in the first try but something went wrong in the
>>> finalizing fase. On retries, the log indicates the snapshot/disk image
>>> no longer exists and the removal of the snapshot fails for this reason.
>>>
>>> Is there any way to clean up this snapshot?
>>>
>>> I can see the snapshot in the "Disk snapshot" tab of the storage. It has
>>> a status of "illegal". Is it OK to (try to) remove this snapshot? Will
>>> this impact the running VM and/or disk image?
>>>
>>> Regards,
>>>
>>> Rik
>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>
>>
>> --
>> Rik Theys
>> System Engineer
>> KU Leuven - Dept. Elektrotechniek (ESAT)
>> Kasteelpark Arenberg 10 bus 2440  - B-3001 Leuven-Heverlee
>> +32(0)16/32.11.07
>> ----------------------------------------------------------------
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>
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