From Bug 894783: Add migrate/resize operation support to Horizon. This bug is to track the implementation of Resize in Horizon.
Verified with : python-django-horizon-2013.2-0.13b3.el6ost.noarch (Havana RHOS 4.0 puddle : 2013-10-03.3) Note: in order to verify I've Changed in /etc/nova/nova.conf allow_resize_to_same_host=True
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/RHEA-2013-1859.html