From FedoraProject

OpenStack

OpenStack consists of a number services for running IaaS clouds. This includes Object Store (Swift), Compute (Nova) and Image (Glance) services, among others.

Historically, Fedora and OpenStack releases have been matching 1:1:

Starting with OpenStack Liberty, this mapping was not possible to maintain anymore due to schedule skew and too many changes in dependencies upstream. The RDO Project maintains OpenStack packages for Enterprise Linux distributions, but these are no longer available for Fedora.

OpenStack Official Documentation

OpenStack in EPEL

The OpenStack Folsom was retired from EPEL 6. Please visit RDO project for running OpenStack on EL platforms.