linux非root用户的rabbitmq集群部署

　　我们之前部署过一个非root用户的rabbitmq节点（参见linux非root用户安装rabbitmq），现在采用同样方式，部署另外两个节点。

　　集群的关键是.erlang.cookie文件，注意前面是有点号的。打开第一个节点看看：

[wlf@wlf188 rabbitmq]$ cd ~
[wlf@wlf188 ~]$ vi .erlang.cookie 

AYMYRMIDTAWBOXCITAXQ
~

　　里面就是一串类似秘钥的东东，把第一个节点的这个秘钥替换掉另外两个节点，因为.erlang.cookie是只读的，vi替换后用wq!即可，替换完确认一下：

[wlf@wlf186 ~]$ cat .erlang.cookie 
AYMYRMIDTAWBOXCITAXQ

　　应该注意的是集群的机器之间网络是OK的，一般都会在etc/hosts文件中配置机器名：

[wlf@wlf188 ~]$ cat /etc/hosts
127.0.0.1   localhost 
::1         localhost 
192.168.10.113    wlf185
192.168.10.112    wlf186
192.168.10.110    wlf188

　　主节点部署在wlf188，假设主节点已经启动，那么现在我们启动从节点（wlf186和wlf185）。先看wlf186：

[wlf@wlf186 ~]$ rabbitmq-server -detatched

  ##  ##
  ##  ##      RabbitMQ 3.7.18. Copyright (C) 2007-2019 Pivotal Software, Inc.
  ##########  Licensed under the MPL.  See https://www.rabbitmq.com/
  ######  ##
  ##########  Logs: /home/wlf/rabbitmq_server-3.7.18/var/log/rabbitmq/rabbit@wlf186.log
                    /home/wlf/rabbitmq_server-3.7.18/var/log/rabbitmq/rabbit@wlf186_upgrade.log

              Starting broker...
 completed with 0 plugins.
 

　　后台启动后，先停应用：

[wlf@wlf186 ~]$ rabbitmqctl stop_app
Stopping rabbit application on node rabbit@wlf186 ...

　　再加入主节点集群：

[wlf@wlf186 ~]$ rabbitmqctl join_cluster rabbit@wlf188
Clustering node rabbit@wlf186 with rabbit@wlf188

　　最后重新拉起应用：

[wlf@wlf186 ~]$ rabbitmqctl start_app
Starting node rabbit@wlf186 ...
 completed with 0 plugins.

　　确认集群状态：

[wlf@wlf186 ~]$ rabbitmqctl cluster_status
Cluster status of node rabbit@wlf186 ...
[{nodes,[{disc,['rabbit@wlf186','rabbit@wlf188']}]},
 {running_nodes,['rabbit@wlf188','rabbit@wlf186']},
 {cluster_name,<<"rabbit@wlf188">>},
 {partitions,[]},
 {alarms,[{'rabbit@wlf188',[]},
          {'rabbit@wlf186',[]}]}]

　　我们看到主节点wlf188和从节点wlf186均为disc——磁盘节点，现在把另一个从节点作为内存节点加入集群，处理步骤同上，只需在加入集群时指定ram参数即可：

[wlf@wlf185 ~]$ rabbitmqctl join_cluster --ram rabbit@wlf188 
Clustering node rabbit@wlf185 with rabbit@wlf188

　　重新启动应用后我们再看看集群状态，wlf185确实是内存节点：

[wlf@wlf185 ~]$ rabbitmqctl cluster_status
Cluster status of node rabbit@wlf185 ...
[{nodes,[{disc,['rabbit@wlf188','rabbit@wlf186']},
         {ram,['rabbit@wlf185']}]},
 {running_nodes,['rabbit@wlf186','rabbit@wlf188',
                 'rabbit@wlf185']},
 {cluster_name,<<"rabbit@wlf188">>},
 {partitions,[]},
 {alarms,[{'rabbit@wlf186',[]},
          {'rabbit@wlf188',[]},
          {'rabbit@wlf185',[]}]}]