Thank you for this very fast answer, that's what i will try first while waiting for Fedora 17 branching from Rawhide.
As i'm using a server dedicated to tests i've no risks at all :)
I will try to keep you informed about my results.
Cheers.

2012/1/28 Pádraig Brady <P@draigbrady.com>
On 01/27/2012 10:42 PM, Bertrand Juglas wrote:
> Hi Mark,
>
> 2012/1/27 Mark McLoughlin <markmc@redhat.com <mailto:markmc@redhat.com>>
>
>     Hi Bertrand,
>
>     On Sun, 2012-01-22 at 21:07 +0100, Bertrand Juglas wrote:
>     > When trying to install OpenStack after having installed Aeolus i've seen
>     > they are not using the same message passing software and had to disable
>     > qpidd installed by Aeolus to be able to start RabbitMQ installed by
>     > OpenStack.
>
>     This will change in Fedora 17 because it will be possible to use
>     OpenStack using Qpid instead of RabbitMQ. See:
>
>      https://fedoraproject.org/wiki/Features/OpenStack_using_Qpid
>
>     Russell and Pádraig are in the process of updating the Fedora 17
>     packages to the version of Essex which supports Qpid, so perhaps you
>     might be able to try out those packages?
>
> Thank you for this information, i would be glad to test those packages because it seems both Aeolus and OpenStack would benefit from an integration together and so should avoid conflicts.
> Do you plan a Fedora 17 Test Day for OpenStack Essex ?

https://fedoraproject.org/wiki/Test_Day:2012-03-08_OpenStack_Test_Day

If you're feeling brave, you can install this qpid supporting
version to Fedora 16.  I ran through the Fedora 16 test day
with these (albeit with rabbitmq), so they should be in reasonably
good shape.

python-novaclient
 http://koji.fedoraproject.org/koji/buildinfo?buildID=296038
openstack-nova
 http://koji.fedoraproject.org/koji/buildinfo?buildID=296037
   After installing you need to run:
     openstack-nova-db-setup
     (cd /var/lib/nova/CA && ./genrootca.sh)
   Also to test qpid you'll need to add this to /etc/nova/nova.conf
     --rpc_backend=nova.rpc.impl_qpid
     For other qpid config params see:
       http://wiki.openstack.org/QpidSupport
openstack-glance
 http://koji.fedoraproject.org/koji/buildinfo?buildID=295932

cheers,
Pádraig.