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Hi Daniele,

Here are the packages I started with in my test environment and what the
initial instances were based on:

dpkg -l | grep qemu
ii  kvm
 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu14.19
ii  qemu-common                      1.0+noroms-0ubuntu14.19

ii  qemu-kvm                         1.0+noroms-0ubuntu14.19

ii  qemu-utils                       1.0+noroms-0ubuntu14.19


dpkg -l | grep libvirt
ii  libvirt-bin                      1.2.2-0ubuntu13.1.6~cloud2
ii  libvirt0                         1.2.2-0ubuntu13.1.6~cloud2
ii  nova-compute-libvirt             1:2014.1.3-0ubuntu1~cloud0
ii  python-libvirt                   1.2.2-0ubuntu2~cloud0

And here's the result after I upgraded the packages using the Icehouse
cloud archive:

dpkg -l | grep qemu
ii  ipxe-qemu
 1.0.0+git-20131111.c3d1e78-2ubuntu1~cloud0
ii  qemu-common                      2.0.0+dfsg-2ubuntu1.6~cloud0
ii  qemu-keymaps                     2.0.0+dfsg-2ubuntu1.6~cloud0
ii  qemu-kvm                         2.0.0+dfsg-2ubuntu1.6~cloud0
ii  qemu-system-common               2.0.0+dfsg-2ubuntu1.6~cloud0
ii  qemu-system-x86                  2.0.0+dfsg-2ubuntu1.6~cloud0
ii  qemu-utils                       2.0.0+dfsg-2ubuntu1.6~cloud0

dpkg -l | grep libvirt
ii  libvirt-bin                      1.2.2-0ubuntu13.1.6~cloud2
ii  libvirt0                         1.2.2-0ubuntu13.1.6~cloud2
ii  nova-compute-libvirt             1:2014.1.3-0ubuntu1~cloud0
ii  python-libvirt                   1.2.2-0ubuntu2~cloud0

The libvirt packages (1.2.2-0ubuntu13.1.6~cloud2), I think, are the most
important part to bridge everything together. These new versions for both
12.04 and 14.04 included the compatibility for vms / instances created with
older qemu versions.

>From the tests I've done so far, everything looks good. I'd love to hear if
you, or others, are still seeing issues after upgrading to the latest
packages.

Thanks,
Joe

On Tue, Nov 18, 2014 at 10:23 AM, Daniele Venzano <
daniele.venzano at eurecom.fr> wrote:

>  Hi,
>
> Which versions did you test, exactly?
>
> Here I'm seeing these in APT:
> 1.0.50-2012.03-0ubuntu2
> 1.0.50-2012.03-0ubuntu2.1
> 1.5.0+dfsg-3ubuntu5.4~cloud0 (havana ubuntu cloud repo)
> 2.0.0+dfsg-2ubuntu1.6~cloud0 (icehouse ubuntu cloud repo)
>
> Thanks,
> Daniele
>
>
> On 11/17/14 21:30, Joe Topjian wrote:
>
> Thanks, Felipe!
>
>  I was going to wait until I did some more testing, but since I'm on this
> topic:
>
>  I have done some preliminary tests with the latest libvirt packages from
> Ubuntu (available in both 12.04 and 14.04). The tests were done in a 12.04
> Icehouse environment that supports live migration. I created several
> instances using the stock qemu and libvirt packages and then upgraded both
> sets of packages.
>
>  Hard rebooting, live migration, and hard reboot of live-migrated
> instances were all successful.
>
>  I still want to run through the tests a few more times (especially
> migrating to 14.04 hosts), but it looks as though the latest Ubuntu
> packages resolve any backwards compatibility issues.
>
>
> On Mon, Nov 17, 2014 at 9:12 PM, Felipe Reyes <freyes at tty.cl> wrote:
>
>> Hi,
>>
>> On Tue, 21 Oct 2014 13:42:24 -0600
>> Joe Topjian <joe at topjian.net> wrote:
>>
>> > > I wonder if the qemu update issues are in the realm of the OpenStack
>> > > project.
>> > > Since they are provided / packaged by the distro's.
>> > > Maybe people from Ubuntu & Redhat (which I would be interested in ;)
>> > > reading this could give some suggestions...
>> > >
>> >
>> > I'd really appreciate someone from Ubuntu or Redhat clarifying this
>> > situation.
>> >
>> There is some work on Ubuntu's side to get a clean migration path, see:
>> https://lists.ubuntu.com/archives/ubuntu-server/2014-October/006983.html
>> https://lists.ubuntu.com/archives/ubuntu-server/2014-November/006988.html
>>
>> Best Regards,
>>
>> PS: I'm not involved in any way with that development, just read about
>> it :)
>> --
>> Felipe Reyes (GPG:0x9B1FFF39)
>> http://tty.cl
>> lp:~freyes | freyes at freenode | freyes at github
>>
>
>
>
> _______________________________________________
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>
>
>
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