今天第二次部署rabbitmq，第一次部署之后早都没有印象了，哎，好无奈，不过依然对rabbitmq不懂，但是先部署好吧。流程这里先不写了，先记录一个问题吧，看见网上大家的这个问题很少见，给需要的小伙伴一个参考吧，可能大家不写是觉得问题简单所以不屑一顾了，但是我这个菜鸟渣渣还得记录一下。安装好之后启动了rabbitmq，查看状态报错如下：
[root@nginx ~]# rabbitmqctl status
Status of node rabbit@nginx ...
Error: unable to perform an operation on node ‘rabbit@nginx‘. Please see diagnostics information and suggestions below.

Most common reasons for this are:

• Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
• CLI tool fails to authenticate with the server (e.g. due to CLI tool‘s Erlang cookie not matching that of the server)
• Target node is not running

In addition to the diagnostics info below:

• See the CLI, clustering and networking guides on http://rabbitmq.com/documentation.html to learn more
• Consult server logs on node rabbit@nginx

DIAGNOSTICS

attempted to contact: [rabbit@nginx]

rabbit@nginx:

• connected to epmd (port 4369) on nginx
• epmd reports node ‘rabbit‘ uses port 25672 for inter-node and CLI tool traffic
• can‘t establish TCP connection to the target node, reason: timeout (timed out)
• suggestion: check if host ‘nginx‘ resolves, is reachable and ports 25672, 4369 are not blocked by firewall

Current node details:

• node name: rabbitmqcli55@nginx
• effective user‘s home directory: /root
• Erlang cookie hash: 5xhHO3pWlZKxcLJlQY+zUA==

原因：
自己修改了主机名，所以需要在hosts文件中做解析。

解决办法：
[root@nginx ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 nginx
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

再查看状态，好了。
[root@nginx ~]# rabbitmqctl status
Status of node rabbit@nginx ...
[{pid,12301},
{running_applications,
[{rabbitmq_management,"RabbitMQ Management Console","3.7.7"},
{rabbitmq_management_agent,"RabbitMQ Management Agent","3.7.7"},
{rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.7.7"},
{rabbit,"RabbitMQ","3.7.7"},
{amqp_client,"RabbitMQ AMQP Client","3.7.7"},
{rabbit_common,
"Modules shared by rabbitmq-server and rabbitmq-erlang-client",
"3.7.7"},
{recon,"Diagnostic tools for production use","2.3.2"},
.
.
.
.
安装过程见word文档，同时有安装脚本。此留作记录。201808082209

原文：http://blog.51cto.com/6010131/2165678