执行创建消息队列用户时：
1 [root@ct ~]# rabbitmqctl add_user openstack RABBIT_PASS
出现报错信息：
1 Error: unable to connect to node rabbit@localhost: nodedown
2
3 DIAGNOSTICS
4 ===========
5
6 attempted to contact: [rabbit@localhost]
7
8 rabbit@localhost:
9 * connected to epmd (port 4369) on localhost
10 * epmd reports node 'rabbit' running on port 25672
11 * TCP connection succeeded but Erlang distribution failed
12
13 * Hostname mismatch: node "rabbit@ct" believes its host is different. Please ensure that hostnames resolve the same way locally and on "rabbit@ct"
14
15
16 current node details:
17 - node name: 'rabbitmq-cli-70@ct'
18 - home dir: /var/lib/rabbitmq
19 - cookie hash: JUOSnyAarD/iR1GN1NJGTQ==
解决：无其他问题，原来是由于# bash 又开了一个shell，# exit 退出到原来的shell执行就行
1 [root@ct ~]# exit
2 exit
3 [root@localhost yum.repos.d]# exit
4 登出
5
6 Connection closed by foreign host.
7
8 Disconnected from remote host(最小化1) at 13:46:32.
9
10 Type `help' to learn how to use Xshell prompt.
11 [c:~]$
12
13 Connecting to 192.168.247.11:22... #重新连接
14 Connection established.
15 To escape to local shell, press 'Ctrl+Alt+]'.
16
17 WARNING! The remote SSH server rejected X11 forwarding request.
18 Last login: Fri Dec 11 19:42:30 2020
19 [root@ct ~]# rabbitmqctl add_user openstack RABBIT_PASS
20 Creating user "openstack" #创建成功