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

[bernhard glomm]

Hi Paul, and all

> With the release of Ubuntu 14.04 LTS, I hope to be able to use libgfapi on our setup.

Well I hope that too, but I'm not sure if that will happen (soon).
I , recompiled qemu as described here:

http://www.gluster.org/community/documentation/index.php/Building_QEMU_with_gfapi_for_Debian_based_systems

with little luck since finally the ipxe-qemu component (which I need/want) 
and I didn't had the time to dig deeper into that.

https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1224517

still says "won't fix it" :-(

Josh Boon (hi Josh) suggested to create a PPA for an ubuntu qemu with gfapi support 
which might be a temporary solution…
But from my "happy end - user" perspective (as a "non-dev-but-op") 
that looks like a lot of parallel extra work
on maintaining that "fork"in the long run.
I hope the gluster devels either can get it into debian(and/or ubuntu) 
or even qemu (as a default option?) directly

> Perhaps the fact that the RedHat specific bug is now private might mean that they're actually doing something with it, but I wouldn't know.

we'll stay on that topic

Regards,
Bernahrd

> Regards, Paul Boven.

> On 02/18/2014 02:59 PM, Adam Huffman wrote:
>> Hi Paul,
>> 
>> Could you keep the list updated? That bug has been marked private, so
>> I can't see it.
>> 
>> Best Wishes,
>> Adam
>> 
>> On Tue, Jan 28, 2014 at 9:29 AM, Paul Boven <boven at jive.nl> wrote:
>>> 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
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> http://supercolony.gluster.org/mailman/listinfo/gluster-users
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> 
> 
> -- 
> 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
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://supercolony.gluster.org/mailman/listinfo/gluster-users
> 
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