安装消息队列服务（安装在控制器上）
yum install rabbitmq-server -y systemctl start mariadb.service
配置消息队列服务
systemctl enable rabbitmq-server.service
systemctl restart rabbitmq-server.service
修改密码
rabbitmqctl change_password guest Abcd1234
Creating user "openstack" ...
...done.
配置允许写和读权限为 OpenStack用户：
rabbitmqctl set_permissions openstack ".*" ".*" ".*" Setting permissions for user "openstack" in vhost "/" ...