[Gluster-users] [Bug 1057645] ownership of diskimage changes during livemigration, livemigration with kvm/libvirt fails

[Paul Boven]

Hi Bernhard, everyone,

The same problem has now been reproduced on RedHat, please see:

https://bugzilla.redhat.com/show_bug.cgi?id=1058032

With 3.4.0 and Ubuntu 13.04, live migrations worked fine. For me it 
broke when the packages were upgraded to 3.4.1.

I've set AppArmor to 'complain' as part of the debugging, so that's not 
the issue.

I'm still not convinced that the file ownership itself is the root cause 
of this issue, it could well be just a symptom. Libvirt/qemu is 
perfectly happy to start a VM when its image file is owned root:root, 
and change ownership to libvirt-qemu:kvm. So I see no reason why it 
couldn't do the same during a live migration.

In my opinion the real issue is the failure at the fuse level, that 
makes file access to the image on the destination impossible, even for root.

Regards, Paul Boven.

On 01/27/2014 07:51 PM, BGM wrote:
> Hi Paul & all
> I'm really keen on getting this solved,
> right now it's a nasty show stopper.
> I could try different gluster versions,
> as long as I can get the .debs for it,
> wouldn't want to start compiling
> (although.... does a config option have changed on package build?)
> you reported that 3.4.0 on ubuntu 13.04 was working, right?
> code diff, config options for package build.
> Another approach: can anyone verify or falsify
> https://bugzilla.redhat.com/show_bug.cgi?id=1057645
> on another distro than ubuntu/debian?
> thinking of it... could it be an apparmor interference?
> I had fun with apparmor and mysql on ubuntu 12.04 once...
> will have a look at that tomorrow.
> As mentioned before, a straight drbd/ocfs2 works (with only 1/4 speed
> and the pain of maintenance) so AFAIK I have to blame the ownership change
> on gluster, not on an issue with my general setup....
> best regards
> Bernhard


-- 
Paul Boven <boven at jive.nl> +31 (0)521-596547
Unix/Linux/Networking specialist
Joint Institute for VLBI in Europe - www.jive.nl
VLBI - It's a fringe science