Open Stack

Hi all,

This is an issue that has come up recently in tripleo as we try to 
support more varied configurations.  Currently qpid-python is not listed 
in requirements.txt for many of the OpenStack projects, even though they 
support using Qpid as a messaging broker.  This means that when we 
install from source in tripleo we have to dynamically add a line to 
requirements.txt if we want to use Qpid (we pip install -r to handle 
deps).  There seems to be disagreement over the correct way to handle 
this, so Joe requested on my proposed Nova change that I raise the issue 
here.

There's already some discussion on the bug here: 
https://bugs.launchpad.net/heat/+bug/1225191 as well as a separate 
Neutron bug here: https://bugs.launchpad.net/neutron/+bug/1225232

If there's a better alternative to "require all the things" I'm 
certainly interested to hear it.  I expect we're going to hit this more 
in the future as we add support for other optional backends for services 
and such.

Thanks.

-Ben