老师，我也遇到这个问题了：
Redirecting to /bin/systemctl restart etcd.service
Warning: etcd.service changed on disk. Run 'systemctl daemon-reload' to reload units.
Job for etcd.service failed because the control process exited with error code. See "systemctl status etcd.service" and "journalctl -xe" for details.
[root@service02 ~]# systemctl daemon-reload
[root@service02 ~]# service etcd restart
Redirecting to /bin/systemctl restart etcd.service
[root@service02 ~]# journalctl -f -u etcd.service
不过，我运行了下Warning中的语句 “systemctl daemon-reload”后，再运行“service etcd restart”就成功起来了
