I am not quite sure that this bugs are related with Grizzly :-

https://bugzilla.redhat.com/show_bug.cgi?id=1045047
https://bugzilla.redhat.com/show_bug.cgi?id=1020979 .

  I can create cinder volume (on glusterfs) via glance image on Havana 2013.2.1 &  CentOS 6.5 (like on F19).
  I can load cloud instance F20, Ubuntu 13.10, Win2012 Server via cinder volume (on glusterfs) prepared on Havana 2013.2.1 & CentOS 6.5 (like on F19) with Grizzly on F19 it was not possible.

Boris.