zookeeper

zookeeper为kafka提供注册中心的功能。需要jdk环境，启动后监听在2181为生产者和消费者提供服务，2888只有leader 监听用于向Follower同步数据。3888用于集群leader选举

主配置文件

cat  zoo.cfg

tickTime=2000
dataDir=/var/lib/zookeeper/
clientPort=2181
initLimit=5
syncLimit=2
server.1=zookeeper-0.zookeeper:2888:3888
server.2=zookeeper-1.zookeeper:2888:3888
server.3=zookeeper-2.zookeeper:2888:3888

启动

/opt/zookeeper-3.4.14/bin/zkServer.sh start
# 启动后查询状态
/opt/zookeeper-3.4.14/bin/zkServer.sh status

测试

./zkCli.sh -server 10.4.7.251:2181