RabbitMQ messaging middleware to build Detailed

1.RabbitMQ Profile

May also be referred messaging middleware message queues, data exchange means is platform-independent and efficient use reliable messaging mechanisms, based on the data communication for distributed system integration. By providing messaging and message queuing model, the communication process can be extended in a distributed environment.
RabbitMQ is an open source message queuing system with Erlang language development, to achieve based on AMQP protocol. AMQP main feature is a message for the queue, the routing (including point and publish / subscribe), reliability and safety. More AMQP protocol used in the enterprise system data consistency, high stability and reliability requirements scenario, the performance and throughput requirements are still followed.
Erlang is a common concurrent oriented programming language
features

• reliability
• Expansibility
• High Availability
• Multiple protocols
• Multi-language client
• Management Interface
• Plug-in mechanism

2. cluster deployment

1. Software installation and deployment environment

准备三台虚拟机
192.168.13.139 rabbitmq-1
192.168.13.142 rabbitmq-2
192.168.13.143 rabbitmq-3

Change three hosts file configuration MQ computer node names are rabbitmq-1, rabbitmq-2 and rabbitmq-3, and then modify the hosts configured member, and turn off the firewall and selinux

192.168.13.139
[root@rabbitmq-1 ~]# hostnamectl set-hostname rabbitmq-1
[root@rabbitmq-1 ~]# vim /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.13.139 rabbitmq-1
192.168.13.142 rabbitmq-2
192.168.13.143 rabbitmq-3
[root@rabbitmq-1 ~]# systemctl stop firewalld && setenforce 0

192.168.13.142
[root@rabbitmq-2 ~]# hostnamectl set-hostname rabbitmq-2
[root@rabbitmq-2 ~]# vim /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.13.139 rabbitmq-1
192.168.13.142 rabbitmq-2
192.168.13.143 rabbitmq-3
[root@rabbitmq-2 ~]# systemctl stop firewalld && setenforce 0

192.168.13.143
[root@rabbitmq-3 ~]# hostnamectl set-hostname rabbitmq-3
[root@rabbitmq-3 ~]# vim /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.13.139 rabbitmq-1
192.168.13.142 rabbitmq-2
192.168.13.143 rabbitmq-3
[root@rabbitmq-3 ~]# systemctl stop firewalld && setenforce 0

Rabbitmq software installation and configuration

192.168.13.139
[root@rabbitmq-1 ~]# yum install -y *epel* gcc-c++ unixODBC unixODBC-devel openssl-devel ncurses-devel
1.yum安装erlang
[root@rabbitmq-1 ~]# wget --content-disposition https://packagecloud.io/rabbitmq/erlang/packages/el/7/erlang-20.3-1.el7.centos.x86_64.rpm/download.rpm   #Erlang环境包
[root@rabbitmq-1 ~]# yum install erlang-20.3-1.el7.centos.x86_64.rpm -y
测试；
[root@rabbitmq-1 ~]# erl
Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:1:1] [ds:1:1:10] [async-threads:10] [hipe] [kernel-poll:false]
Eshell V9.3  (abort with ^G)
1>
2.安装rabbitmq
[root@rabbitmq-1 ~]# wget https://dl.bintray.com/rabbitmq/all/rabbitmq-server/3.7.5/rabbitmq-server-3.7.5-1.el7.noarch.rpm
[root@rabbitmq-1 ~]# yum -y install rabbitmq-server-3.7.5-1.el7.noarch.rpm
3.启动
[root@rabbitmq-1 ~]# systemctl daemon-reload
[root@rabbitmq-1 ~]# systemctl start rabbitmq-server
[root@rabbitmq-1 ~]# systemctl enable rabbitmq-server
[root@rabbitmq-1 ~]# systemctl status rabbitmq-server
[root@rabbitmq-1 ~]# rabbitmq-plugins enable rabbitmq_management   #管理界面
#如果报错，重启服务就好了

192.168.13.139
4.创建用户
注意:在一台机器操作
添加用户和密码
[root@rabbitmq-1 ~]# rabbitmqctl add_user yjssjm yjssjm
Adding user "yjssjm" ...
设置为管理员
[root@rabbitmq-1 ~]# rabbitmqctl set_user_tags yjssjm administrator
Setting tags for user "yjssjm" to [administrator] ...
查看用户
[root@rabbitmq-1 ~]# rabbitmqctl list_users
Listing users ...
guest	[administrator]
yjssjm	[administrator]
...done.
[root@rabbitmq-1 ~]# rabbitmqctl set_permissions -p "/" yjssjm ".*" ".*" ".*"
Setting permissions for user "yjssjm" in vhost "/" ...
#此处设置权限时注意'.*'之间需要有空格 三个'.*'分别代表了conf权限，read权限与write权限 例如：当没有给
5.开启用户远程登录
[root@rabbitmq-1 ~]# cd /etc/rabbitmq/   
[root@rabbitmq-1 rabbitmq]# cp /usr/share/doc/rabbitmq-server-3.7.5/rabbitmq.config.example /etc/rabbitmq/rabbitmq.config
[root@rabbitmq-1 rabbitmq]# ls
enabled_plugins  rabbitmq.config
[root@rabbitmq-1 rabbitmq]# vim rabbitmq.config
修改如下: 在61行左右
{loopback_users, []}
[root@rabbitmq-1 ~]# systemctl restart rabbitmq-server   #重启服务

192.168.13.142
[root@rabbitmq-2 ~]# yum install -y *epel* gcc-c++ unixODBC unixODBC-devel openssl-devel ncurses-devel
1.yum安装erlang
[root@rabbitmq-2 ~]# wget --content-disposition https://packagecloud.io/rabbitmq/erlang/packages/el/7/erlang-20.3-1.el7.centos.x86_64.rpm/download.rpm   #Erlang环境包
[root@rabbitmq-2 ~]# yum install erlang-20.3-1.el7.centos.x86_64.rpm -y
[root@rabbitmq-2 ~]# erl
Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:1:1] [ds:1:1:10] [async-threads:10] [hipe] [kernel-poll:false]
Eshell V9.3  (abort with ^G)
1>
2.安装rabbitmq
[root@rabbitmq-2 ~]# wget https://dl.bintray.com/rabbitmq/all/rabbitmq-server/3.7.5/rabbitmq-server-3.7.5-1.el7.noarch.rpm
[root@rabbitmq-2 ~]# yum -y install rabbitmq-server-3.7.5-1.el7.noarch.rpm
3.启动
[root@rabbitmq-2 ~]# systemctl daemon-reload
[root@rabbitmq-2 ~]# systemctl start rabbitmq-server
[root@rabbitmq-2 ~]# systemctl enable rabbitmq-server
[root@rabbitmq-2 ~]# systemctl status rabbitmq-server
[root@rabbitmq-2 ~]# rabbitmq-plugins enable rabbitmq_management   #管理界面
#如果报错，重启服务就好了
4.开启用户远程登录
[root@rabbitmq-2 ~]# cd /etc/rabbitmq/   
[root@rabbitmq-2 rabbitmq]# cp /usr/share/doc/rabbitmq-server-3.7.5/rabbitmq.config.example /etc/rabbitmq/rabbitmq.config
[root@rabbitmq-2 rabbitmq]# ls
enabled_plugins  rabbitmq.config
[root@rabbitmq-2 rabbitmq]# vim rabbitmq.config
修改如下: 在61行左右
{loopback_users, []}
[root@rabbitmq-2 ~]# systemctl restart rabbitmq-server

192.168.13.143
[root@rabbitmq-3 ~]# yum install -y *epel* gcc-c++ unixODBC unixODBC-devel openssl-devel ncurses-devel
1.yum安装erlang
[root@rabbitmq-3 ~]# wget --content-disposition https://packagecloud.io/rabbitmq/erlang/packages/el/7/erlang-20.3-1.el7.centos.x86_64.rpm/download.rpm   #Erlang环境包
[root@rabbitmq-3 ~]# yum install erlang-20.3-1.el7.centos.x86_64.rpm -y
[root@rabbitmq-3 ~]# erl
Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:1:1] [ds:1:1:10] [async-threads:10] [hipe] [kernel-poll:false]
Eshell V9.3  (abort with ^G)
1>
2.安装rabbitmq
[root@rabbitmq-3 ~]# wget https://dl.bintray.com/rabbitmq/all/rabbitmq-server/3.7.5/rabbitmq-server-3.7.5-1.el7.noarch.rpm
[root@rabbitmq-3 ~]# yum -y install rabbitmq-server-3.7.5-1.el7.noarch.rpm
3.启动
[root@rabbitmq-3 ~]# systemctl daemon-reload
[root@rabbitmq-3 ~]# systemctl start rabbitmq-server
[root@rabbitmq-3 ~]# systemctl enable rabbitmq-server
[root@rabbitmq-3 ~]# systemctl status rabbitmq-server
[root@rabbitmq-3 ~]# rabbitmq-plugins enable rabbitmq_management   #管理界面
#如果报错，重启服务就好了
4.开启用户远程登录
[root@rabbitmq-3 ~]# cd /etc/rabbitmq/   
[root@rabbitmq-3 rabbitmq]# cp /usr/share/doc/rabbitmq-server-3.7.5/rabbitmq.config.example /etc/rabbitmq/rabbitmq.config
[root@rabbitmq-3 rabbitmq]# ls
enabled_plugins  rabbitmq.config
[root@rabbitmq-3 rabbitmq]# vim rabbitmq.config
修改如下: 在61行左右
{loopback_users, []}
[root@rabbitmq-3 ~]# systemctl restart rabbitmq-server

2. Visit the web page

查看端口
[root@rabbitmq-1 rabbitmq]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:4369            0.0.0.0:*               LISTEN      1205/epmd           
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      985/sshd            
tcp        0      0 0.0.0.0:15672           0.0.0.0:*               LISTEN      988/beam.smp        
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1285/master         
tcp        0      0 0.0.0.0:25672           0.0.0.0:*               LISTEN      988/beam.smp        
tcp6       0      0 :::4369                 :::*                    LISTEN      1205/epmd           
tcp6       0      0 :::22                   :::*                    LISTEN      985/sshd            
tcp6       0      0 ::1:25                  :::*                    LISTEN      1285/master         
tcp6       0      0 :::5672                 :::*                    LISTEN      988/beam.smp        
=========================================================================================
4369 -- erlang端口
5672 --程序连接端口
15672 -- 管理界面ui端口
25672 -- server间内部通信端口

Access page: 192.168.13.139: 15672

RabbitMQ default administrator user: guest Password: guest
newly added users to: yjssjm Password: yjssjm

3. Deploy a cluster

192.168.13.139
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
[root@rabbitmq-1 ~]# vim /etc/rabbitmq/rabbitmq-env.conf    #创建配置文件
添加下面的内容：
RABBITMQ_MNESIA_BASE=/data/rabbitmq/data
RABBITMQ_LOG_BASE=/data/rabbitmq/logs
[root@rabbitmq-1 ~]# systemctl restart rabbitmq-server #重启服务
2.拷erlang.cookie
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。Erlang的集群中
各节点是经由各个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.
(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
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 [email protected]:/var/lib/rabbitmq/
[root@rabbitmq-1 ~]# scp /var/lib/rabbitmq/.erlang.cookie [email protected]:/var/lib/rabbitmq/

192.168.13.142
1.首先创建好数据存放目录和日志存放目录:
[root@rabbitmq-2 ~]# mkdir -p /data/rabbitmq/data
[root@rabbitmq-2 ~]# mkdir -p /data/rabbitmq/logs
[root@rabbitmq-2 ~]# chmod 777 -R /data/rabbitmq
[root@rabbitmq-2 ~]# chown rabbitmq.rabbitmq /data/ -R
[root@rabbitmq-2 ~]# vim /etc/rabbitmq/rabbitmq-env.conf    #创建配置文件
添加下面的内容：
RABBITMQ_MNESIA_BASE=/data/rabbitmq/data
RABBITMQ_LOG_BASE=/data/rabbitmq/logs
[root@rabbitmq-2 ~]# systemctl restart rabbitmq-server #重启服务
2.将mq-2作为内存节点加到mq-1节点集群中
[root@rabbitmq-2 ~]# rabbitmqctl stop_app  #停止节点，切记不是停止服务
[root@rabbitmq-2 ~]# rabbitmqctl reset   #如果有数据需要重置，没有则不用

If you execute this command # rabbitmqctl stop_app error

注意查看回显，如果不是以上图片中的就是错误；如果报错，重启rabbitmq服务
[root@rabbitmq-2 ~]# systemctl restart rabbitmq-server
如果还是报错：将传过来的文件给与正确的权限
[root@rabbitmq-2 ~]# chmod 400 /var/lib/rabbitmq/.erlang.cookie
[root@rabbitmq-2 ~]# chown rabbitmq.rabbitmq /var/lib/rabbitmq/.erlang.cookie

将节点2加入集群，指定角色
[root@rabbitmq-2 ~]# rabbitmqctl join_cluster --ram rabbit@rabbitmq-1  #添加到内存节点
Clustering node 'rabbit@rabbitmq-2' with 'rabbit@rabbitmq-1' ...
[root@rabbitmq-2 ~]# rabbitmqctl start_app  #启动节点
Starting node 'rabbit@rabbitmq-2' ...
 completed with 3 plugins.

192.168.13.143
1.首先创建好数据存放目录和日志存放目录:
[root@rabbitmq-3 ~]# mkdir -p /data/rabbitmq/data
[root@rabbitmq-3 ~]# mkdir -p /data/rabbitmq/logs
[root@rabbitmq-3 ~]# chmod 777 -R /data/rabbitmq
[root@rabbitmq-3 ~]# chown rabbitmq.rabbitmq /data/ -R
[root@rabbitmq-3 ~]# vim /etc/rabbitmq/rabbitmq-env.conf    
添加下面的内容：
RABBITMQ_MNESIA_BASE=/data/rabbitmq/data
RABBITMQ_LOG_BASE=/data/rabbitmq/logs
[root@rabbitmq-3 ~]# systemctl restart rabbitmq-server 
2.将mq-2作为内存节点加到mq-1节点集群中
[root@rabbitmq-3 ~]# rabbitmqctl stop_app  
[root@rabbitmq-3 ~]# rabbitmqctl reset  
[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' ...
 completed with 3 plugins.

（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rabbitmq应用

View cluster status

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

Each machine shows three nodes, said that it has successfully added!
Log in to view
your browser to http://192.168.13.139:15672