Problem Can't start Opennebula over CentOs 7?

The direction is the way to do ( http://docs.opennebula.org/5.0/deployment/opennebula_installation/frontend_installation.html) .
But, a problem which happen in this step(6) is :

[root@one-sandbox ~]# service opennebula start
Rediretcing to /bin/systemctl start opennebula.service

Anyone have solution?
Thanks.

It is normal. You can use “systemctl start opennebula” instead. And check service status
"systemctl status opennebula" .