RabbitMQ集群部署

防火墙开启的话，需要开放3个指定端口：5672、15672、25672

1.下载安装包

下载epel

wget https://mirrors.tuna.tsinghua.edu.cn/epel/7/x86_64/Packages/e/epel-release-7-14.noarch.rpm
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下载socat

wget http://www.rpmfind.net/linux/centos/7.9.2009/os/x86_64/Packages/socat-1.7.3.2-2.el7.x86_64.rpm
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下载erlang

wget https://github.com/rabbitmq/erlang-rpm/releases/download/v23.2.1/erlang-23.2.1-1.el7.x86_64.rpm
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下载rabbitmq-server

wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.8.9/rabbitmq-server-3.8.9-1.el7.noarch.rpm
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2.安装

yum install -y epel-release-7-14.noarch.rpm
yum install -y socat-1.7.3.2-2.el7.x86_64.rpm
yum install -y erlang-23.2.1-1.el7.x86_64.rpm
rpm -ivh rabbitmq-server-3.8.9-1.el7.noarch.rpm
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启动rabbitmq-server

systemctl start rabbitmq-server
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查看状态

systemctl status rabbitmq-server
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停止服务命令

systemctl stop rabbitmq-server
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3.集群部署

同步集群节点中的cookie

ls -a /var/lib/rabbitmq
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注意要rabbitmq-server启动过才会显示.erlang.cookie
把第二台、第三台上门的.erlang.cookie删除掉，然后使用source copy命令把第一台的.erlang.cookie拷贝到二三上面来，保持一致

修改hosts文件

vi /etc/hosts
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192.168.170.1 name1
192.168.170.2 name2
192.168.170.3 name3

启动rabbitmq-server

不出意外应该会报下面的错误

Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status rabbitmq-server.service" and "journalctl -xe" for details.
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.erlang.cookie 默认账号权限是rabbitmq，我们copy过来之后变成了root会导致启动不了，修改一下用户权限

 chown rabbitmq:rabbitmq .erlang.cookie 
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再来启动rabbitmq-server

集群构建
先把3台服务器的rabbitmq-server服务重启

systemctl restart rabbitmq-server
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然后在服务器二、三上面执行，@hostname1改成你的服务器1的hostname

rabbitmqctl stop_app
rabbitmqctl join_cluster rabbit@hostname1
rabbitmqctl start_app
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4.创建用户、配置镜像策略

在3台服务器上开启管理插件

rabbitmq-plugins enable rabbitmq_management
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rabbitmqctl add_user admin 密码

rabbitmqctl set_permissions -p / admin "." "." ".*"

rabbitmqctl set_user_tags admin administrator		#将admin加入administrator超级管理员组
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登录web页面
http://ip:15672

镜像策略配置

rabbitmqctl set_policy all ".*" '{"ha-mode":"all","ha-sync-mode":"automatic"}'
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所有队列设置为镜像队列，即队列会被同步到各个节点保持状态一致，RabbitMQ高可用集群就已经搭建好了。

最后设置开机自启

systemctl enable rabbitmq-server.service
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