在centos系统的/etc/hosts添加了 当前主机的 ‘ NAT分配的IP controller’，RabbitMQ添加用户报错。

在centos系统的/etc/hosts添加了 当前主机的 ‘ NAT分配的IP controller’，RabbitMQ添加用户报错。

rabbitMq添加用户 报错信息如下

[root@controller ~]# rabbitmqctl add_user openstack2 123456
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

  * Hostname mismatch: node "rabbit@controller" believes its host is different. Please ensure that hostnames resolve the same way locally and on "rabbit@controller"

current node details:
- node name: 'rabbitmq-cli-99@controller'
- home dir: /var/lib/rabbitmq
- cookie hash: TWK04n7cLtARuM+8uTR9pw==

[root@controller ~]# rabbitmqctl  add_user openstack2 123456 -n rabbit@controller
Creating user "openstack2"
[root@controller ~]# 

解决：添加 -n rabbit@controller

rabbitmqctl  add_user openstack2 123456 -n rabbit@controller

参考：https://www.cnblogs.com/free-wings/p/10273067.html