systemctl restart openstack-keystone

Job for openstack-keystone.service failed. See 'systemctl status openstack-keyst                                                                                                                                                             one.service' and 'journalctl -xn' for details.
[root@localhost ~]# systemctl status openstack-keystone.service
openstack-keystone.service - OpenStack Identity Service (code-named Keystone)
   Loaded: loaded (/usr/lib/systemd/system/openstack-keystone.service; enabled)
   Active: failed (Result: start-limit) since Tue 2015-12-29 07:12:30 EST; 8s ag                                                                                                                                                             o
  Process: 9025 ExecStart=/usr/bin/keystone-all (code=exited, status=1/FAILURE)
Main PID: 9025 (code=exited, status=1/FAILURE)

Dec 29 07:12:30 localhost.localdomain systemd[1]: Failed to start OpenStack I...
Dec 29 07:12:30 localhost.localdomain systemd[1]: Unit openstack-keystone.ser...
Dec 29 07:12:30 localhost.localdomain systemd[1]: openstack-keystone.service ...
Dec 29 07:12:30 localhost.localdomain systemd[1]: Stopping OpenStack Identity...
Dec 29 07:12:30 localhost.localdomain systemd[1]: Starting OpenStack Identity...
Dec 29 07:12:30 localhost.localdomain systemd[1]: openstack-keystone.service ...
Dec 29 07:12:30 localhost.localdomain systemd[1]: Failed to start OpenStack I...
Dec 29 07:12:30 localhost.localdomain systemd[1]: Unit openstack-keystone.ser...
Hint: Some lines were ellipsized, use -l to show in full.

Loaded: loaded (/usr/lib/systemd/system/openstack-keystone.service; enabled)
   Active: failed (Result: start-limit) since Tue 2015-12-29 07:12:30 EST; 8s ag


这里说失败了，但是没有说具体怎么失败的。启动失败，当然也有很多原因：
1.比如时间不一致
2.配置错误
3.keystone配置错误等。
还是去看日志。

卸载参考这个吧

http://jingyan.baidu.com/article/a24b33cd5678bd19fe002bf6.html

谢谢，你的推荐