Rabbitmq 分布式集群环境搭建

 1、MQ

       MQ全称为Message Queue, 消息队列（MQ）是一种应用程序对应用程序的通信方法。应用程序通过读写出入队列的消息（针对应用程序的数据）来通信，而无需专用连接来链接它们。消息传递指的是程序之间通过在消息中发送数据进行通信，而不是通过直接调用彼此来通信，直接调用通常是用于诸如远程过程调用的技术。

2、安装

http://www.rabbitmq.com/download.html 选择通用二进制办解压安装

4、启动

sbin/rabbitmq-server -detached

 5、启用web管理界面

sbin/rabbitmq-plugins enable rabbitmq_management

 web访问： http://IP:15672/

6、设置账号密码

# 删除guest账号
sbin/rabbitmqctl delete_user guest
# 新增管理账号 admin
sbin/rabbitmqctl add_user admin 123456
# 设置admin为超级管理员
sbin/rabbitmqctl set_user_tags admin administrator
# 查看当前用户角色列表
 sbin/rabbitmqctl list_users 

 7、Java 客户端代码

a、加入Jar包

<dependency>
	        <groupId>com.rabbitmq</groupId>
	        <artifactId>amqp-client</artifactId>
	        <version>3.0.4</version>
	</dependency>

b、生成着代码

import java.io.IOException;  
  
import com.rabbitmq.client.Channel;  
import com.rabbitmq.client.Connection;  
import com.rabbitmq.client.ConnectionFactory;  
  
public class Send {  
    private final static String QUEUE_NAME = "hello";  
  
    public static void main(String[] args) throws IOException {  
        ConnectionFactory factory = new ConnectionFactory();  
        factory.setHost("10.0.0.104");  
        factory.setUsername("rabbitmq");
        factory.setPassword("123456"); 
        factory.setPort( 5672); 
        Connection connection = factory.newConnection();  
        Channel channel = connection.createChannel();  
        // 这里第二个参数是指消息是否持久化，持久化传递true，这里和消费者保持一致
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        
        for(int x=0;x<20;x++){
	        String message = "Hello World!";  
	        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());  
	        System.out.println(" [x] Sent '" + message + "'");  
        }
        channel.close();  
        connection.close();  
    }  
}  

 c、消费者代码

import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;  
   
  
public class Reqv {  
    private final static String QUEUE_NAME = "hello";  
  
    public static void main(String[] argv) throws Exception {  
  
        ConnectionFactory factory = new ConnectionFactory();  
        factory.setHost("10.0.0.104");  
        factory.setUsername("rabbitmq");
        factory.setPassword("123456"); 
        Connection connection = factory.newConnection();  
        Channel channel = connection.createChannel();  
        // 这里第二个参数是指消息是否持久化，持久化传递true，这里和生产者保持一致
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);  
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");  
  
         DefaultConsumer consumer = new DefaultConsumer(channel){
        	
        	@Override
        	public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
        			throws IOException {
        		System.out.println(" [m] Received '" + new String(body, "UTF-8") + "'" ); 
        	}
        };
        boolean autoAck = true;
        
        channel.basicConsume(QUEUE_NAME, autoAck, consumer);
    }  
}  

8、spring boot amqp 

a、引入Jar包

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>

b、配置文件：

spring:
    rabbitmq:
      host: 10.0.0.104
      port: 5672
      username: admin
      password: 123456

  

c、生产者代码

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MessageQueueService {
	@Autowired
	private RabbitTemplate rabbitTemplate;
	public void send(String msg) {
		System.out.println("Sender : " + msg);
		rabbitTemplate.convertAndSend( "hello" , msg);
	}
	
}

d、消费者代码：

import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
@RabbitListener(queues = { "hello" } ) 
public class ReceiverQueue {
	@RabbitHandler
	public void process(String hello) {
		System.out.println("Receiver : " + hello);
	}
}

9、如果提示没有权限，进入web管理界面，选择Admin，将来Can access virtual hosts列设置成，当然也可以根据目录结构控制权限

 

10、rabbitmq 分布式搭建

a、准备两台机器server1和server2 或者docker环境，两台机器上都安装上面服rabbitmq，然后运行命令

两台机器都要启动rabbitmq

#停止rabbitmq应用，并不是server
sbin/rabbitmqctl stop_app
#链接server1
sbin/rabbitmqctl join_cluster rabbit@server1
# 这里可能会提示下面错误
Error: unable to connect to nodes [rabbit@rabbitmqmaster]: nodedown

DIAGNOSTICS
===========

attempted to contact: [rabbit@rabbitmqmaster]

rabbit@rabbitmqmaster:
  * connected to epmd (port 4369) on rabbitmqmaster
  * epmd reports node 'rabbit' running on port 25672
  * TCP connection succeeded but Erlang distribution failed

  * Authentication failed (rejected by the remote node), please check the Erlang cookie


current node details:
- node name: 'rabbitmq-cli-88@rabbitmqsalver2'
- home dir: /root
- cookie hash: 55WeQTsiv71JcEDq/JcE9Q==

找到home dir 下面的.erlang.cookie，这里的是 /root/.erlang.cookie 讲将两台机器的该文件内容保持一致，再次运行该命令成功。

# 查看集群状态
sbin/rabbitmqct cluster_status

 11、命令设置账号可权限

#设置
sbin/rabbitmqctl set_permissions -p "/" admin ".*" ".*" ".*"
#查看权限
sbin/rabbitmqctl list_permissions