Nova on RHEL6 needs to require a minimum libvirt version of >= 0.10.2-29.el6_5.2 which contains the fix for bug 1038815. This is needed for Cinder GlusterFS snapshots for attached volumes to function. Currently Nova depends on libvirt >= 0.10.2-23.
Fairly simple fix: -Requires: libvirt >= 0.10.2-23 +Requires: libvirt >= 0.10.2-29.el6_5.2
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2014-0578.html