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  • ActiveMQ 基于zookeeper的主从(levelDB Master/Slave)搭建以及Spring-boot下使用

    0:说明

      ActiveMQ 5.9.0新推出的主从实现,基于zookeeper来选举出一个master,其他节点自动作为slave实时同步消息。因为有实时同步数据的slave的存在,master不用担心数据丢失,所以leveldb会优先采用内存存储消息,异步同步到磁盘,所以该方式的activeMQ读写性能最好因为选举机制要超过半数,所以最少需要3台节点,才能实现高可用。如果集群是两台则master失效后slave会不起作用,所以集群至少三台。此种方式仅实现主备功能,避免单点故障,没有负载均衡功能。

    1:环境准备

    IP
    192.168.3.10    server1
    192.168.3.11    server2
    192.168.3.12 server3

    安装软件信息:

    apache-activemq-5.13.0-bin.tar.gz

    zookeeper-3.5.2-alpha.tar.gz

    ZooInspector.zip

    2:搭建Zookeeper集群

    (1)将zookeeper-3.5.2-alpha.tar.gz文件解压到/home/wzh/zk目录;

    (2)将zoo_sample.cfg复制一份为 zoo.cfg,并修改其配置信息

    wzh@hd-master:~/zk/zookeeper-3.5.2-alpha/conf$ cp zoo_sample.cfg zoo.cfg

    wzh@hd-master:~/zk/zookeeper-3.5.2-alpha/conf$vim zoo.cfg

    tickTime=2000
    
    initLimit=10
    
    syncLimit=5
    
    dataDir=/tmp/zookeeper
    
    clientPort=2181
    
     
    
    server.1=192.168.3.10:2888:3888
    
    server.2=192.168.3.11:2888:3888
    
    server.3=192.168.3.11:2888:3888

    (3)创建/tmp/zookeeper目录

    在该目录下创建名为myid的文件,内容为1(这个值随server而改变)

    (4)将server1上的/home/wzh/zk/zookeeper-3.5.2-alpha文件夹复制到server2,server3,然后创建/tmp/zookeeper目录

    在该目录下创建名为myid的文件,内容为2

    (5)启动zookeeper

    [192.168.3.10]

    wzh@hd-master:~/zk/zookeeper-3.5.2-alpha/bin$ ./zkServer.sh start
    
    ZooKeeper JMX enabled by default
    
    Using config: /home/wzh/zk/zookeeper-3.5.2-alpha/bin/../conf/zoo.cfg
    
    Starting zookeeper ... STARTED

    [192.168.3.11]

    wzh@hd-slave1:~/zk/zookeeper-3.5.2-alpha/bin$ ./zkServer.sh start
    
    ZooKeeper JMX enabled by default
    
    Using config: /home/wzh/zk/zookeeper-3.5.2-alpha/bin/../conf/zoo.cfg
    
    Starting zookeeper ... STARTED

    [192.168.3.12]

    wzh@hd-slave2:~/zk/zookeeper-3.5.2-alpha/bin$ ./zkServer.sh start
    
    ZooKeeper JMX enabled by default
    
    Using config: /home/wzh/zk/zookeeper-3.5.2-alpha/bin/../conf/zoo.cfg
    
    Starting zookeeper ... STARTED

    3:搭建ActiveMQ集群

    (1)将apache-activemq-5.13.0-bin.tar.gz解压到/home/wzh/amq

    (2)修改activemq.xml配置文件

    【1】将broker节点的brokerName设置为wzhamq

    <broker xmlns="http://activemq.apache.org/schema/core" brokerName="wzhamq" dataDirectory="${activemq.data}">

    【2】将persistenceAdapter的持久化方式选用replicatedLevelDB,将kahaDB方式注释掉

     <persistenceAdapter>
             <!--
                <kahaDB directory="${activemq.data}/kahadb"/>
             -->
            <replicatedLevelDB 
                    directory="${activemq.data}/leveldb" 
                    replicas="3" 
                    bind="tcp://0.0.0.0:0"        
                    zkAddress="192.168.3.10:2181,192.168.3.11:2181"     
                    hostname="192.168.3.10"          
                    sync="local_disk"          
                    zkPath="/activemq/leveldb-stores"/>
            </persistenceAdapter>

    将apache-activemq-5.13.复制到11,12机器

    wzh@hd-master:~/amq$ scp -r apache-activemq-5.13.0/ wzh@192.168.3.11:/tmp

    修改配置文件中的hostname="192.168.3.11"   

    修改配置文件中的hostname="192.168.3.12"   

    (3)启动ActiveMQ

    wzh@hd-master:~/amq$ ./apache-activemq-5.13.0/bin/activemq status
    INFO: Loading '/home/wzh/amq/apache-activemq-5.13.0//bin/env'
    INFO: Using java '/opt/java/jdk1.8.0_91/bin/java'
    ActiveMQ is running (pid '2031')
    wzh@hd-master:~/amq$

    依次启动192.168.3.11,192.168.3.12机器

    4:集群管理

    (1)通过使用ZooInspector工具查看zookeeper集群情况

    (2)http://192.168.3.10:8161/admin/ 默认用户名与口令为admin登录ActiveMQ管理端

    5:通过Spring-boot操作ActiveMQ JMS

    (1)通过gradle构建Spring-boot应用,在 gradle文件中增加

    dependencies {
        compile('org.springframework.boot:spring-boot-starter-activemq')
        compile('org.springframework.boot:spring-boot-starter-web')
        testCompile('org.springframework.boot:spring-boot-starter-test')
    }

    (2)application中增加以下配置

    spring.activemq.broker-url=failover:(tcp://192.168.3.10:61616,tcp://192.168.3.11:61616,tcp://192.168.3.12:61616)
    spring.activemq.in-memory=true
    spring.activemq.pool.enabled=false
    spring.activemq.user=admin
    spring.activemq.password=admin

    (3)JMS消息发送

    @Service
    public class Producer {
    
        @Autowired
        private JmsMessagingTemplate jmsTemplate;
    
        public void sendMessage(Destination destination, final String message){
            jmsTemplate.convertAndSend(destination, message);
        }
    }

    (4)JMS消息接收

    @Component
    public class Consumer {
        @JmsListener(destination = "test.queue")
        public void receiveQueue(String text){
    
            System.out.println("Consumer收到的报文为:"+text);
        }
    }

    (5)测试

    @RestController
    @RequestMapping(
            value = "/test",
            headers = "Accept=application/json",
            produces = "application/json;charset=utf-8"
    )
    public class TestCtrl {
        @Autowired
        Producer producer;
    
        Destination destination = new ActiveMQQueue("test.queue");
    
        @RequestMapping(
                value = "/say/{msg}/to/{name}",
                method = RequestMethod.GET
        )
        public Map<String, Object> say(@PathVariable String msg, @PathVariable String name){
            Map<String, Object> map = new HashMap<>();
            map.put("msg", msg);
            map.put("name", name);
    
            producer.sendMessage(destination, msg);
    
            return map;
        }
    }

    (6)进入ActiveMQ管理控制台创建一个消息队列

    test.queue

    (7)通过POSTMAN进行测试

    2017-08-03 08:10:44.928 INFO 12820 --- [ActiveMQ Task-3] o.a.a.t.failover.FailoverTransport : Successfully reconnected to tcp://192.168.3.10:61616
    2017-08-03 08:11:08.854 INFO 12820 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport : Successfully connected to tcp://192.168.3.10:61616
    Consumer收到的报文为:hello
    2017-08-03 08:43:39.464 INFO 12820 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport : Successfully connected to tcp://192.168.3.10:61616
    Consumer收到的报文为:hello

    (8)目前系统连接的是10,如果此时将10集群Down掉,系统会理解选择一台slave作为master提供服务,从而启动案例主备的效果。



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  • 原文地址:https://www.cnblogs.com/yshyee/p/7277801.html
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