I am trying to install OpenStack on CentOS 7 by following the official documentation at: http://docs.openstack.org/juno/install-guide/install/yum/content/ch_basic_environment.html#basics-messaging-server (http://docs.openstack.org/juno/instal...)

and after starting the server, I try to check the status, and I get:

rabbitmqctl status
Status of node 'rabbit@OS-controller' ...
Error: unable to connect to node 'rabbit@OS-controller': nodedown

DIAGNOSTICS
===========

nodes in question: ['rabbit@OS-controller']

hosts, their running nodes and ports:
- OS-controller: [{rabbitmqctl30801,50119}]

current node details:
- node name: 'rabbitmqctl30801@OS-controller'
- home dir: /var/lib/rabbitmq
- cookie hash: qjmursdWY1l7OJSWpqPKew==

Everything is default, I just installed it by

yum install rabbitmq-server

and then

systemctl enable rabbitmq-server.service
systemctl start rabbitmq-server.service

Does anybody know why am I getting this error?