rabbitmq集群安装

一、安装rabbitmq实例

三台机器全部进行操作，安装rabiitmq，开启远程登录及web界面

[root@rabbitmq-1 ~]# hostnamectl set-hostname rabbitmq-1
[root@rabbitmq-1 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
10.36.192.100 package.qf.com
10.36.192.251 rabbitmq-1
10.36.192.252 rabbitmq-2
10.36.192.253 rabbitmq-3

# 安装依赖环境
[root@rabbitmq-1 ~]# yum install -y epel-release gcc-c++ unixODBC unixODBC-devel openssl-devel ncurses-devel
[root@rabbitmq-1 ~]# curl -s https://packagecloud.io/install/repositories/rabbitmq/erlang/script.rpm.sh | sudo bash
[root@rabbitmq-1 ~]# yum install erlang-21.3.8.21-1.el7.x86_64

# 安装rabbitmq
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v3.7.10
[root@rabbitmq-1 ~]# wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.7.10/rabbitmq-server-3.7.10-1.el7.noarch.rpm
[root@rabbitmq-1 ~]# yum install rabbitmq-server-3.7.10-1.el7.noarch.rpm

# 开启远程登录
[root@rabbitmq-1 ~]# cp /usr/share/doc/rabbitmq-server-3.7.10/rabbitmq.config.example /etc/rabbitmq/rabbitmq.config
[root@rabbitmq-1 ~]# vim /etc/rabbitmq/rabbitmq.config
## 打开loopback_users的注释
   %% Uncomment the following line if you want to allow access to the
   %% guest user from anywhere on the network.
   {loopback_users, []}

[root@rabbitmq-1 ~]# systemctl restart rabbitmq-server
# 开启rabbitmq的web访问界面：
[root@rabbitmq-1 ~]# rabbitmq-plugins enable rabbitmq_management

二、配置集群

1.首先创建好数据存放目录和日志存放目录:

[root@rabbitmq-1 ~]# mkdir -p /data/rabbitmq/data
[root@rabbitmq-1 ~]# mkdir -p /data/rabbitmq/logs
[root@rabbitmq-1 ~]# chmod 777 -R /data/rabbitmq
[root@rabbitmq-1 ~]# chown rabbitmq.rabbitmq /data/ -R
创建配置文件:
[root@rabbitmq-1 ~]# vim /etc/rabbitmq/rabbitmq-env.conf
[root@rabbitmq-1 ~]# cat /etc/rabbitmq/rabbitmq-env.conf
RABBITMQ_MNESIA_BASE=/data/rabbitmq/data
RABBITMQ_LOG_BASE=/data/rabbitmq/logs
重启服务
[root@rabbitmq-1 ~]# systemctl restart rabbitmq-server

2. Rabbitmq的集群是依附于erlang的集群来⼯作的,所以必须先构建起erlang的集群景象。Erlang的集群中

   各节点是经由过程⼀个magic cookie来实现的,这个cookie存放在/var/lib/rabbitmq/.erlang.cookie中，⽂件是400的权限。所以必须保证各节点cookie⼀致,不然节点之间就⽆法通信.

   如果执行# rabbitmqctl stop_app 这条命令报错:需要执行

   #如果执行# rabbitmqctl stop_app 这条命令报错:需要执行
   #chmod 400 .erlang.cookie
   #chown rabbitmq.rabbitmq .erlang.cookie
   

   (官方在介绍集群的文档中提到过.erlang.cookie 一般会存在这两个地址：第一个是home/.erlang.cookie；第二个地方就是/var/lib/rabbitmq/.erlang.cookie。如果我们使用解压缩方式安装部署的rabbitmq，那么这个文件会在{home}目录下，也就是$home/.erlang.cookie。如果我们使用rpm等安装包方式进行安装的，那么这个文件会在/var/lib/rabbitmq目录下。)

   [root@rabbitmq-1 ~]# cat /var/lib/rabbitmq/.erlang.cookie
   HOUCUGJDZYTFZDSWXTHJ
   ⽤scp的⽅式将rabbitmq-1节点的.erlang.cookie的值复制到其他两个节点中。
   [root@rabbitmq-1 ~]# scp /var/lib/rabbitmq/.erlang.cookie root@192.168.50.139:/var/lib/rabbitmq/
   [root@rabbitmq-1 ~]# scp /var/lib/rabbitmq/.erlang.cookie root@192.168.50.140:/var/lib/rabbitmq/
   

   3.将mq-2、mq-3作为内存节点加⼊mq-1节点集群中

在mq-2、mq-3执⾏如下命令：
[root@rabbitmq-2 ~]# systemctl restart rabbitmq-server
[root@rabbitmq-2 ~]# rabbitmqctl stop_app
[root@rabbitmq-2 ~]# rabbitmqctl reset
[root@rabbitmq-2 ~]# rabbitmqctl join_cluster --ram rabbit@rabbitmq-1
Clustering node 'rabbit@rabbitmq-2' with 'rabbit@rabbitmq-1' ...
[root@rabbitmq-2 ~]# rabbitmqctl start_app
Starting node 'rabbit@rabbitmq-2' ...
======================================================================
[root@rabbitmq-3 ~]# systemctl restart rabbitmq-server
[root@rabbitmq-3 ~]# rabbitmqctl stop_app
Stopping node 'rabbit@rabbitmq-3' ...
[root@rabbitmq-3 ~]# rabbitmqctl reset
Resetting node 'rabbit@rabbitmq-3' ...
[root@rabbitmq-3 ~]# rabbitmqctl join_cluster --ram rabbit@rabbitmq-1
Clustering node 'rabbit@rabbitmq-3' with 'rabbit@rabbitmq-1' ...
[root@rabbitmq-3 ~]# rabbitmqctl start_app
Starting node 'rabbit@rabbitmq-3' ...

（1）默认rabbitmq启动后是磁盘节点，在这个cluster命令下，mq-2和mq-3是内存节点，
mq-1是磁盘节点。
（2）如果要使mq-2、mq-3都是磁盘节点，去掉--ram参数即可。
（3）如果想要更改节点类型，可以使⽤命令rabbitmqctl change_cluster_node_type
disc(ram),前提是必须停掉rabbit应⽤
注:
#如果有需要使用磁盘节点加入集群
 [root@rabbitmq-2 ~]# rabbitmqctl join_cluster  rabbit@rabbitmq-1
 [root@rabbitmq-3 ~]# rabbitmqctl join_cluster  rabbit@rabbitmq-1

4. 查看集群状态

在 RabbitMQ 集群任意节点上执行 rabbitmqctl cluster_status来查看是否集群配置成功。
在mq-1磁盘节点上面查看
[root@rabbitmq-1 ~]# rabbitmqctl cluster_status
Cluster status of node rabbit@rabbitmq-1 ...
[{nodes,[{disc,['rabbit@rabbitmq-1','rabbit@rabbitmq-3']},
         {ram,['rabbit@rabbitmq-2']}]},
 {running_nodes,['rabbit@rabbitmq-3','rabbit@rabbitmq-2','rabbit@rabbitmq-1']},
 {cluster_name,<<"rabbit@rabbitmq-1">>},
 {partitions,[]},
 {alarms,[{'rabbit@rabbitmq-3',[]},
          {'rabbit@rabbitmq-2',[]},
          {'rabbit@rabbitmq-1',[]}]}]

5. web界面查看

6. 镜像集群配置

   [root@rabbitmq-1 ~]# rabbitmqctl set_policy  ha-all "^" '{"ha-mode":"all"}'
   [root@rabbitmq-2 ~]# rabbitmqctl set_policy  ha-all "^" '{"ha-mode":"all"}'
   [root@rabbitmq-3 ~]# rabbitmqctl set_policy  ha-all "^" '{"ha-mode":"all"}'