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

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[root@rnode1 ~]# 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

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[root@rnode1 ~]# rabbitmqctl cluster_status Cluster status of node rabbit@rnode1 [{nodes,[{disc,[rabbit@rnode1]}]}, {running_nodes,[rabbit@rnode1]}, {cluster_name,<<"rabbit@rnode1">>}, {partitions,[]}, {alarms,[{rabbit@rnode1,[]}]}]

分别在rnode2、rnode3上执行以下命令使其与rnode1组成集群

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[root@rnode2 ~]# rabbitmqctl stop_app Stopping rabbit application on node rabbit@rnode2 [root@rnode2 ~]# rabbitmqctl join_cluster --ram rabbit@rnode1 Clustering node rabbit@rnode2 with rabbit@rnode1 [root@rnode2 ~]# rabbitmqctl start_app Starting node rabbit@rnode2

随便选择一台集群观察节点状态发现集群已经搭建完毕

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[root@rnode3 ~]# rabbitmqctl cluster_status Cluster status of node rabbit@rnode3 [{nodes,[{disc,[rabbit@rnode1]},{ram,[rabbit@rnode3,rabbit@rnode2]}]}, {running_nodes,[rabbit@rnode2,rabbit@rnode1,rabbit@rnode3]}, {cluster_name,<<"rabbit@rnode1">>}, {partitions,[]}, {alarms,[{rabbit@rnode2,[]},{rabbit@rnode1,[]},{rabbit@rnode3,[]}]}]

安装过程中可能会出现如下问题

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[root@rnode1 ~]# rabbitmqctl status Status of node rabbit@rnode1 Error: unable to connect to node rabbit@rnode1: nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@rnode1] rabbit@rnode1: * 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: 'rabbitmq-cli-01@rnode1' - 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