(一)zookeeper与activemq原理
使用ZooKeeper实现的Master-Slave实现方式,是对ActiveMQ进行高可用的一种有效的解决方案,高可用的原理:使用ZooKeeper(集群)注册所有的ActiveMQ Broker。只有其中的一个Broker可以对外提供服务(也就是Master节点),其他的Broker处于待机状态,被视为Slave。如果Master因故障而不能提供服务,则利用ZooKeeper的内部选举机制会从Slave中选举出一个Broker充当Master节点,继续对外提供服务。
(二)环境
centos版本
# cat /etc/redhat-release CentOS release 6.5 (Final)
zookeeper环境
主机IP 消息端口 通信端口 节点目录/usr/local/下 192.168.92.134 2181 2888:3888 zookeeper 192.168.92.135 2181 2888:3888 zookeeper 192.168.92.136 2181 2888:3888 zookeeper
activemq环境
主机IP 消息端口 控制台端口 节点目录/usr/local/下 192.168.92.134 61616 8161 activemq 192.168.92.135 61616 8161 activemq 192.168.92.136 61616 8161 activemq
(3)安装zookeeper
1)基本配置
#node1配置:192.168.92.134 [ -d /tools ] || mkdir /tools cd /tools wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.3.6/zookeeper-3.3.6.tar.gz tar xf zookeeper-3.3.6.tar.gz -C /usr/local/ ln -sv /usr/local/zookeeper-3.3.6/ /usr/local/zookeeper mkdir /usr/local/zookeeper/{data,log} echo 1 >/usr/local/zookeeper/data/myid echo "export PATH=/usr/local/zookeeper/bin:$PATH" >>/etc/profile ; source /etc/profile #node2配置:192.168.92.135 [ -d /tools ] || mkdir /tools cd /tools wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.3.6/zookeeper-3.3.6.tar.gz tar xf zookeeper-3.3.6.tar.gz -C /usr/local/ ln -sv /usr/local/zookeeper-3.3.6/ /usr/local/zookeeper mkdir /usr/local/zookeeper/{data,log} echo 2 >/usr/local/zookeeper/data/myid echo "export PATH=/usr/local/zookeeper/bin:$PATH" >>/etc/profile ; source /etc/profile #node3:192.168.92.136 [ -d /tools ] || mkdir /tools cd /tools wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.3.6/zookeeper-3.3.6.tar.gz tar xf zookeeper-3.3.6.tar.gz -C /usr/local/ ln -sv /usr/local/zookeeper-3.3.6/ /usr/local/zookeeper mkdir /usr/local/zookeeper/{data,log} echo 3 >/usr/local/zookeeper/data/myid echo "export PATH=/usr/local/zookeeper/bin:$PATH" >>/etc/profile ; source /etc/profile
2)修改配置文件:三台节点的配置相同
cd /usr/local/zookeeper/conf cp zoo_sample.cfg zoo.cfg
#vim zoo.cfg clientPort=2181 server.1=192.168.92.134:2888:3888 server.2=192.168.92.135:2888:3888 server.3=192.168.92.136:2888:3888 dataDir=/usr/local/zookeeper/data dataLogDir=/usr/local/zookeeper/log
3)三台节点启动zookeeper
zkServer.sh start ss -anltup | grep 2181
```
zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper-3.3.6/bin/../conf/zoo.cfg
Mode: follower
zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper-3.3.6/bin/../conf/zoo.cfg
Mode: leader
```