在 CentOS 7.2 安裝 RabbitMQ ，啓動時提示以下信息：
# /sbin/service rabbitmq-server start
Starting rabbitmq-server (via systemctl): Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status rabbitmq-server.service" and "journalctl -xe" for details.
[失敗]
查看具體錯誤信息
按照提示，執行提示中的命令：
# journalctl -xe
If you believe that inet_gethost should be allowed read access on the unix file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep inet_gethost /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp
9月 12 12:46:45 192.168.1.155 su[16863]: pam_unix(su:session): session closed for user rabbitmq
9月 12 12:46:45 192.168.1.155 rabbitmq-server[16469]: Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
9月 12 12:46:45 192.168.1.155 rabbitmq-server[16469]: rabbitmq-server.
9月 12 12:46:45 192.168.1.155 systemd[1]: rabbitmq-server.service: control process exited, code=exited status=1
9月 12 12:46:45 192.168.1.155 systemd[1]: Failed to start LSB: Enable AMQP service provided by RabbitMQ broker.
-- Subject: Unit rabbitmq-server.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit rabbitmq-server.service has failed.
--
-- The result is failed.
9月 12 12:46:45 192.168.1.155 systemd[1]: Unit rabbitmq-server.service entered failed state.
9月 12 12:46:45 192.168.1.155 systemd[1]: rabbitmq-server.service failed.
9月 12 12:46:45 192.168.1.155 systemd[1]: Removed slice user-986.slice.
-- Subject: Unit user-986.slice has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit user-986.slice has finished shutting down.
9月 12 12:46:45 192.168.1.155 systemd[1]: Stopping user-986.slice.
-- Subject: Unit user-986.slice has begun shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit user-986.slice has begun shutting down.
9月 12 12:46:46 192.168.1.155 polkitd[4950]: Unregistered Authentication Agent for unix-process:16463:35625599 (system bus name :1.1502, object path /org/freedesktop/PolicyKit1/Authentication
# systemctl status rabbitmq-server.service
● rabbitmq-server.service - LSB: Enable AMQP service provided by RabbitMQ broker
Loaded: loaded (/etc/rc.d/init.d/rabbitmq-server)
Active: failed (Result: exit-code) since 一 2016-09-12 12:46:45 CST; 1min 22s ago
Docs: man:systemd-sysv-generator(8)
Process: 16469 ExecStart=/etc/rc.d/init.d/rabbitmq-server start (code=exited, status=1/FAILURE)
9月 12 12:46:40 192.168.1.155 systemd[1]: Starting LSB: Enable AMQP service provided by RabbitMQ broker...
9月 12 12:46:41 192.168.1.155 su[16556]: (to rabbitmq) root on none
9月 12 12:46:43 192.168.1.155 su[16863]: (to rabbitmq) root on none
9月 12 12:46:43 192.168.1.155 su[16862]: (to rabbitmq) root on none
9月 12 12:46:45 192.168.1.155 rabbitmq-server[16469]: Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
9月 12 12:46:45 192.168.1.155 rabbitmq-server[16469]: rabbitmq-server.
9月 12 12:46:45 192.168.1.155 systemd[1]: rabbitmq-server.service: control process exited, code=exited status=1
9月 12 12:46:45 192.168.1.155 systemd[1]: Failed to start LSB: Enable AMQP service provided by RabbitMQ broker.
9月 12 12:46:45 192.168.1.155 systemd[1]: Unit rabbitmq-server.service entered failed state.
9月 12 12:46:45 192.168.1.155 systemd[1]: rabbitmq-server.service failed.
輸出信息中關鍵的一句：Starting rabbitmq-server: FAILED - check /var/log/rabbitmq/startup_{log, _err}
# cat /var/log/rabbitmq/startup_err
發現文件是空的；
# cat /var/log/rabbitmq/startup_log
ERROR: epmd error for host 192: badarg (unknown POSIX error)
解決方法
看到日誌信息了，還是一臉的懵逼啊！
搜索吧，萬能的搜索啊！
找到一要救命稻草：http://stackoverflow.com/questions/8633882/rabbitmq-on-ubuntu-10-04-server
按照第一個方法，查看了一下自己的hostname
# hostname
192.168.1.155
居然是IP地址；
編輯 /etc/hosts 文件
# vi /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 192.168.1.155
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
示例，假如你的 hostname 是 67714
su
vim /etc/hosts
127.0.0.1 localhost.localdomain localhost 67714
::1 localhost6.localdomain6 localhost6
service rabbitmq-server start
但是不管用啊，還是一樣的錯誤，可能是因爲我的hostname是IP地址的原因吧，具體沒 有去測試；
試一下另一個解決方案吧！
其實官網都提示啦，只是自己英語太差，根本沒把它當回事！
# vi /etc/rabbitmq/rabbitmq-env.conf
NODENAME=rabbit@localhost
只需要在文件中寫是一句“NODENAME=rabbit@localhost”，保存就OK啦；
# /sbin/service rabbitmq-server start
Starting rabbitmq-server (via systemctl): [ 確定 ]
啓動成功，問題解決了！
原文鏈接：https://blog.csdn.net/testcs_dn/article/details/52514199