root@controller:/etc/nova# sudo nova-manage service list
2012-05-16 16:26:17 DEBUG nova.utils [req-7d52b306-f6c1-4cff-a1ab-d8edda0a4817 None None] backend <module 'nova.db.sqlalchemy.api' from '/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.pyc'> from (pid=3324) __get_backend /usr/lib/python2.7/dist-packages/nova/utils.py:658
Binary           Host                                 Zone             Status     State Updated_At
nova-compute     controller                           nova             enabled    XXX   2012-05-16 23:11:33
nova-scheduler   controller                           nova             enabled    :-)   2012-05-16 23:26:09
nova-volume      controller                           nova             enabled    :-)   2012-05-16 23:26:09
nova-cert        controller                           nova             enabled    XXX   None
nova-consoleauth controller                           nova             enabled    XXX   2012-05-16 23:11:32
nova-network     controller                           nova             enabled    :-)   2012-05-16 23:26:13