gistfile1.txt

--- ./var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/rpcapi.py.orig        2016-07-04 11:20:03.570816078 -0400
+++ ./var/lib/kolla/venv/lib/python2.7/site-packages/nova/compute/rpcapi.py     2016-07-04 11:21:39.210036515 -0400
@@ -647,6 +647,7 @@
         if not cell_client.can_send_version(version):
             version = '4.0'
             args.pop('migration')
+        LOG.debug('version to use %s', version)
         cctxt = cell_client.prepare(server=host, version=version)
         cctxt.cast(ctxt, 'live_migration', instance=instance,
                    dest=dest, block_migration=block_migration,


< DO MIGRATION >

$ grep -i "version to" /var/log/kolla/nova/nova-compute.log
<empty set>