RabbitMQ集群安装

首先参考上一篇文章【CentsOS原生RabbitMQ安装过程】在两到三台机器上先安装单独的RabbitMQ节点

修改一下hostname

[[email protected] ~]# vim /etc/hosts
172.16.20.110 rnode1
172.16.20.111 rnode2
172.16.20.112 rnode3

erlang节点之间通信需要相同的cookie文件，将其中一个机器上的cookie文件copy到另外两个机器

1 2	scp /var/lib/rabbitmq/.erlang.cookie rnode2:/var/lib/rabbitmq scp /var/lib/rabbitmq/.erlang.cookie rnode3:/var/lib/rabbitmq

首先在rnode1上观察一下节点状态如下

[[email protected] ~]# rabbitmqctl cluster_status
Cluster status of node [email protected]
[{nodes,[{disc,[[email protected]]}]},
 {running_nodes,[[email protected]]},
 {cluster_name,<<"[email protected]">>},
 {partitions,[]},
 {alarms,[{[email protected],[]}]}]

分别在rnode2、rnode3上执行以下命令使其与rnode1组成集群

[[email protected] ~]# rabbitmqctl stop_app
Stopping rabbit application on node [email protected]
[[email protected] ~]# rabbitmqctl join_cluster --ram [email protected]
Clustering node [email protected] with [email protected]
[[email protected] ~]# rabbitmqctl start_app
Starting node [email protected]

随便选择一台集群观察节点状态发现集群已经搭建完毕

[[email protected] ~]# rabbitmqctl cluster_status
Cluster status of node [email protected]
[{nodes,[{disc,[[email protected]]},{ram,[[email protected],[email protected]]}]},
 {running_nodes,[[email protected],[email protected],[email protected]]},
 {cluster_name,<<"[email protected]">>},
 {partitions,[]},
 {alarms,[{[email protected],[]},{[email protected],[]},{[email protected],[]}]}]

安装过程中可能会出现如下问题

[[email protected] ~]# rabbitmqctl status
Status of node [email protected]
Error: unable to connect to node [email protected]: nodedown

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

attempted to contact: [[email protected]]

[email protected]:
  * connected to epmd (port 4369) on rnode1
  * epmd reports: node 'rabbit' not running at all
                  no other nodes on rnode1
  * suggestion: start the node

current node details:
- node name: '[email protected]'
- home dir: /var/lib/rabbitmq
- cookie hash: DGMyi0De4NLhiCnlJmHsTg==

此问题停止RabbitMQ的服务再重新启动即可解决

1 2	rabbitmq-server stop rabbitmq-server -detached

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