[libvirt-users] recovering from deleted snapshot

[Doug Hughes]

Yes, I find it annoying that I have to manually remove the no-nos bless
leftover snapshot file. That'd be a great feature. In the mean time I will
look at adding this additional error handling in my script. Thanks much!

On Jun 30, 2017 10:55 AM, "Peter Krempa" <pkrempa at redhat.com> wrote:

> On Fri, Jun 30, 2017 at 10:41:25 -0400, doug.hughes at keystonenap.com wrote:
> > sorry about top post, tablet mail client...
> >
> > brilliant! that did it! Any idea what happened to cause it to partially
> fail and get into this state?
>
> virsh blockcommit --pivot is actually 3 operations in sequence:
> 1) initiate the commit job
> 2) wait till it finishes
> 3) initiate the pivot job (this is synchronous, so the wait till it
> finises is itegrated in the API call)
>
> Apparently in your case the waiting part failed for some reason and thus
> the job was not finished, lingering in the synchronised state.
>
> The unfortunate part is that you don't know which operation failed.
>
> Unfortunately it does not seem that we have wa waiting version of 'virsh
> blockjob' that could be used to do the waiting. You can do the polling
> manualy though.
>
> The third operation can be split out by default, since you can specify
> --wait instead of --pivot for 'virsh blockcommit' and it will finish
> after step 2 above.
>
> Also one of the cases which would help is that libvirt could actually
> remove the file after commit, which would avoid the original problem,
> since the file would still be there.
>
> > oot at vm1 ~]# virsh blockjob serv1r2 vda
> > Active Block Commit: [100 %]
> >
> > [root at vm1 ~]# virsh blockjob --pivot serv1r2 vda
> >
> > [root at vm1 ~]#
> > [root at vm1 ~]# ls -l /var/lib/libvirt/images/serv1r2.qcow2
> > -rw-r--r--. 1 qemu qemu 54200696832 Jun 30 10:39 /var/lib/libvirt/images/
> serv1r2.qcow2
> > [root at vm1 ~]# date
> > Fri Jun 30 10:39:12 EDT 2017
> > [root at vm1 ~]# date
> > Fri Jun 30 10:39:51 EDT 2017
> > [root at vm1 ~]# ls -l /var/lib/libvirt/images/serv1r2.qcow2
> > -rw-r--r--. 1 qemu qemu 54200696832 Jun 30 10:40 /var/lib/libvirt/images/
> serv1r2.qcow2
> > [root at vm1 ~]#
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20170630/b00669e5/attachment.htm>