環境:
    容器環境：docker 1.12.1
    映象版本：centos 7.2.1151
    1.新增叢集節點報錯：

[[email protected] /]# rabbitmqctl join_cluster --ram [email protected]
Clustering node [email protected] with [email protected] ...
Error: unable to connect to nodes [[email protected]]: nodedown

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

attempted to
 
 contact: [[email protected]]

[email protected]:
  * connected to epmd (port 4369) on rabbitmqmaster
  * epmd reports node 'rabbit' running on port 25672
  * TCP connection succeeded but Erlang distribution failed

  * Authentication failed (rejected by the remote node), please check the Erlang cookie


current node details:
- node name
 
: 'rabbitmq-cli-88@rabbitmqsalver2'
- home dir: /root
- cookie hash: 55WeQTsiv71JcEDq/JcE9Q==

     從錯誤提示 TCP connection succeeded but Erlang distribution failed，Authentication failed (rejected by the remote node), please check the Erlang cookie 可以看出是 Erlang cookie的問題，節點的cookie和主節點的cookie不一致。解決辦法在每個主機的$HOME目錄下新建一個.erlang.cookie,裡面隨便輸入一段字串。或者在/var/lib/rabbitmq這個目錄下新建同樣的檔案，裡面隨便寫些字元，但是要在/etc/rabbitmq/rabbit-env.conf裡面通過HOME=/var/lib/rabbitmq來指定。所有節點的.erlang.cookie必須保持一致。
    2.啟動RabbitMQ出現"Cookie file /var/lib/rabbitmq/.erlang.cookie must be accessible by owner only",這個是cookie訪問許可權的問題，解決辦法如下：
 

[root@rabbitmqmaster /]# chmod 600 /var/lib/rabbitmq/.erlang.cookie