六、RabbitMQ集群架构——镜像模式

1. rmp安装rabbitmq

#erlang
wget https://github.com/rabbitmq/erlang-rpm/releases/download/v20.3.8.9/erlang-20.3.8.9-1.el7.centos.x86_64.rpm
# socat
wget http://repo.iotti.biz/CentOS/7/x86_64/socat-1.7.3.2-5.el7.lux.x86_64.rpm
# rabbitmq, el7和el6针对的是linux版本，centos7或者6
wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.7.6/rabbitmq-server-3.7.6-1.el7.noarch.rpm
# 安装
rpm -ivh erlang-20.3.8.9-1.el7.centos.x86_64.rpm
rpm socat-1.7.3.2-5.el7.lux.x86_64.rpm
rpm rabbitmq-server-3.7.6-1.el7.noarch.rpm
# 配置文件的位置
vim /usr/lib/rabbitmq/lib/rabbitmq_server-3.6.5/ebin/rabbit.app

# 用户添加
rabbitmqctl add_user admin admin 
#添加用户，后面两个参数分别是用户名和密码，我这都用superrd了。 
# set_permissions [-p <vhost>] <username> <conf> <write> <read> 
rabbitmqctl set_permissions -p / admin ".*" ".*" ".*" 
#添加权限 
rabbitmqctl set_user_tags admin administrator #修改用户角色
# web插件
rabbitmq-plugins enable rabbitmq_management

2. 搭建集群

前提:安装三个节点的rabbitmq,分别在s130，s131，s132

# 1. 停止三个节点
rabbitmqctl stop
# 2. 集群启动,三个节点都启动
rabbitmq-server -detached
# 假如s130为主节点,复制s130中的.erlang.cookie到s131,s132
scp /var/lib/rabbitmq/.erlang.cookie [email protected]:/var/lib/rabbitmq/
scp /var/lib/rabbitmq/.erlang.cookie [email protected]:/var/lib/rabbitmq/
# 3. s131操作,s132亦是如此
rabbitmqctl stop_app
rabbitmqctl join_cluster [email protected]
rabbitmqctl start_app
# 5.集群收缩
rabbitmqctl forget_cluster_node [email protected]
# 6. 集群名称修改
rabbitmqctl set_cluster_name rabbitmq_itcloud

如图所示集群节点加入成功

集群状态查看

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

总结：

有很多资料要做RabbitMQ的负载均衡，我觉得没有必要，我们提前建好队列，将队列分布在不同的节点上面，依然可以达到HaProxy负载均衡的效果，最主要可以省去很多运维的繁琐。