[ovirt-users] Cleanup illegal snapshot

[Ala Hino]

Hi Markus,

What's the version that you are using?
In oVirt 3.6.6, illegal snapshots could be removed by retrying to live
merge them again. Assuming the previous live merge of the snapshot
successfully completed but the engine failed to get the result, the second
live merge should do the necessary cleanups at the engine side. See
https://bugzilla.redhat.com/1323629

Hope this helps,
Ala

On Thu, Oct 6, 2016 at 11:53 AM, Markus Stockhausen <stockhausen at collogia.de
> wrote:

> Hi Ala,
>
> > Von: Adam Litke [alitke at redhat.com]
> > Gesendet: Freitag, 30. September 2016 15:54
> > An: Markus Stockhausen
> > Cc: Ovirt Users; Ala Hino; Nir Soffer
> > Betreff: Re: [ovirt-users] Cleanup illegal snapshot
> >
> > On 30/09/16 05:47 +0000, Markus Stockhausen wrote:
> > >Hi,
> > >
> > >if a OVirt snapshot is illegal we might have 2 situations.
> > >
> > >1) qemu is still using it - lsof shows qemu access to the base raw and
> the
> > >delta qcow2 file. -> E.g. a previous live merge failed. In the past we
> > >successfully solved that situation by setting the status of the delta
> image
> > >in the database to OK.
> > >
> > >2) qemu is no longer using it. lsof shows qemu access only to the the
> base
> > >raw file -> E.g. a previous live merge succeded in qemu but Ovirt did
> not
> > >recognize.
> > >
> > >How to clean up the 2nd situation?
> >
> > It seems that you will have to first clean up the engine database to
> > remove references to the snapshot that no longer exists.  Then you
> > will need to remove the unused qcow2 volume.
> >
> > Unfortunately I cannot provide safe instructions for modifying the
> > database but maybe Ala Hino (added to CC:) will be able to help with
> > that.
>
> Do you have some tip for me?
>
> >
> > One you have fixed the DB you should be able to delete the volume
> > using a vdsm verb on the SPM host:
> >
> > # vdsClient -s 0 deleteVolume <sdUUID> <spUUID> <imgUUID> <volUUID>
>
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