搭建openstack，报：Error: unable to connect to node rabbit@localhost: nodedown

执行：
# rabbitmqctl add_user openstack passw0rd

报出：
Error: unable to connect to node rabbit@localhost: nodedown

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

attempted to contact: [rabbit@localhost]

rabbit@localhost:
* connected to epmd (port 4369) on localhost
* epmd reports node 'rabbit' running on port 25672
* TCP connection succeeded but Erlang distribution failed
* suggestion: hostname mismatch?
* suggestion: is the cookie set correctly?
* suggestion: is the Erlang distribution using TLS?

current node details:
- node name: 'rabbitmq-cli-54@controller'
- home dir: /var/lib/rabbitmq

解决方法：其他都没有什么问题，原来是由于# bash 又开了一个shell，# exit 退出到原来的shell执行就行了。