[Rdo-list] [keystone] fails to start

[Alan Pevec]

> Did you try to install os-collect-config using pip? If you did that, pip might have tried to update several Python libraries used by OpenStack components, and that usually creates a mess in your system.
>
> It is possible to recover from it by manually uninstalling and reinstalling the modules updated by pip, but it can be complicated. If it is a test system I would suggest reinstalling.

Oh yes, please do not ever run pip system-wide on RPM based
installation, two don't mix at all!
If using stuff from pip, install in venv.
But in this case, we do have os-* packages in RDO repo, so just yum
install them.

Cheers,
Alan