在部署openstack R版时，在compute节点启动openstack-nova-compute.service服务出现错误 求助

求助：

求助各位大佬：
在部署openstack R版时，在compute节点启动openstack-nova-compute.service服务出现错误，以下是日志：

[root@compute log]# tail -f /var/log/nova/nova-compute.log
2019-02-15 18:16:36.281 14519 ERROR nova     self.ensure_connection()
2019-02-15 18:16:36.281 14519 ERROR nova   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 700, in ensure_connection
2019-02-15 18:16:36.281 14519 ERROR nova     self.ensure(method=self.connection.connect)
2019-02-15 18:16:36.281 14519 ERROR nova   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/impl_rabbit.py", line 811, in ensure
2019-02-15 18:16:36.281 14519 ERROR nova     raise exceptions.MessageDeliveryFailure(msg)
2019-02-15 18:16:36.281 14519 ERROR nova MessageDeliveryFailure: Unable to connect to AMQP server on controller:5672 after None tries: (0, 0): (403) ACCESS_REFUSED - Login was refused using authentication mechanism AMQPLAIN. For details see the broker logfile.
2019-02-15 18:16:36.281 14519 ERROR nova 
2019-02-15 18:16:41.310 14532 INFO os_vif [-] Loaded VIF plugins: ovs, linux_bridge, noop
2019-02-15 19:01:40.323 17457 INFO os_vif [-] Loaded VIF plugins: ovs, linux_bridge, noop
2019-02-16 10:28:18.982 7424 INFO os_vif [-] Loaded VIF plugins: ovs, linux_bridge, noop

[root@compute ~]# systemctl status openstack-nova-compute.service
● openstack-nova-compute.service - OpenStack Nova Compute Server
   Loaded: loaded (/usr/lib/systemd/system/openstack-nova-compute.service; disabled; vendor preset: disabled)
   Active: activating (start) since Sat 2019-02-16 11:19:26 CST; 1ms ago
 Main PID: 23326 ((-compute))
    Tasks: 0
   CGroup: /system.slice/openstack-nova-compute.service

Feb 16 11:19:26 compute systemd[1]: Starting OpenStack Nova Compute Server...