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Zookeeper Startup

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ZooKeeper: A Distributed Coordination Service for Distributed Applications

See https://zookeeper.apache.org/doc/current/zookeeperOver.html

Install

Standalone Mode on CentOS7

Download: http://www.apache.org/dyn/closer.cgi/zookeeper/

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wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/stable/zookeeper-3.4.14.tar.gz
tar -zxf zookeeper-3.4.14.tar.gz 
cd zookeeper-3.4.14

创建文件conf/zoo.cfg

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tickTime=2000
dataDir=/var/lib/zookeeper
clientPort=2181

Start zk

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bin/zkServer.sh start

Replicated ZooKeeper

至少三台，建议奇数台server，每台安装zk

新建文件dataDir/myid，内容是server number, in ASCII

conf/zoo.cfg 

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tickTime=2000
dataDir=/var/lib/zookeeper
clientPort=2181
initLimit=5
syncLimit=2
server.1=zoo1:2888:3888
server.2=zoo2:2888:3888
server.3=zoo3:2888:3888

Startup

进入控制台

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# bin/zkCli.sh -server 127.0.0.1:2181
Connecting to 127.0.0.1:2181

[zk: 127.0.0.1:2181(CONNECTED) 1] ls /
[zookeeper]

简单例子

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# 进入控制台以后
create /zk_test my_data
ls /
get /zk_test
set /zk_test junk
delete /zk_test
ls /

查看kafka的topic
ls /brokers/topics

检查状态
http://zookeeper.apache.org/doc/r3.1.2/zookeeperAdmin.html#sc_zkCommands
$ echo stat | nc 127.0.0.1 2181

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