root@controller:~# nova service-list
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
| 1 | nova-cert | controller | internal | enabled | up | 2015-10-13T08:28:35.000000 | - |
| 2 | nova-consoleauth | controller | internal | enabled | up | 2015-10-13T08:28:36.000000 | - |
| 3 | nova-scheduler | controller | internal | enabled | up | 2015-10-13T08:28:38.000000 | - |
| 4 | nova-conductor | controller | internal | enabled | up | 2015-10-13T08:28:36.000000 | - |
| 7 | nova-compute | compute2 | nova | enabled | up | 2015-10-13T08:28:36.000000 | - |
| 8 | nova-compute | compute3 | nova | enabled | up | 2015-10-13T08:28:40.000000 | - |
| 9 | nova-compute | compute1 | nova | disabled | up | 2015-10-13T08:28:37.000000 | - |
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
:: disabled --> enable
usage: nova service-enable <hostname> <binary>
root@controller:~# nova service-enable compute1 nova-compute
+----------+--------------+---------+
| Host | Binary | Status |
+----------+--------------+---------+
| compute1 | nova-compute | enabled |
+----------+--------------+---------+
root@controller:~# nova service-disable compute1 nova-compute
+----------+--------------+----------+
| Host | Binary | Status |
+----------+--------------+----------+
| compute1 | nova-compute | disabled |
+----------+--------------+----------+
