diff -uNr a/fence/agents/compute/fence_evacuate.py b/fence/agents/compute/fence_evacuate.py

--- a/fence/agents/compute/fence_evacuate.py	2018-06-28 14:24:54.000000000 +0200

+++ b/fence/agents/compute/fence_evacuate.py	2018-07-11 09:08:56.975072003 +0200

@@ -74,12 +74,15 @@

 		}

 def _is_server_evacuable(server, evac_flavors, evac_images):

+	reason = "flavor "+server.flavor.get('id')

 	if server.flavor.get('id') in evac_flavors:

 		return True

 	if hasattr(server.image, 'get'):

 		if server.image.get('id') in evac_images:

 			return True

-	logging.debug("Instance %s is not evacuable" % server.image.get('id'))

+		reason = reason +" and image "+server.image.get('id')

+

+	logging.debug("Instance is not evacuable: no match for %s" % reason)

 	return False

 def _get_evacuable_flavors(connection):