本文主要包括：
Zookeeper可以干什么？
Zookeeper安装与启动
Zookeeper安装
Zookeeper需要用到java，安装前需要安装java，这里省略
官网下载Zookeeper安装包，并解压
tar zxvf zookeeper-3.4.6.tar.gz -C .
cd zookeeper-3.4.6/conf
cp zoo_sample.cfg zoo.cfg 修改zoo.cfg
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/opt/modules/zookeeper-3.4.6/zkData
dataLogDir=/opt/modules/zookeeper-3.4.6/zkDataLog
# the port at which the clients will connect
clientPort=2181这里设置了dataDir和dataLogDir，手动生成了这两个文件，不知道会不会自动生成
最后，设置Zookeeper的环境变量
Zookeeper启动等操作
# 启动
cd /opt/modules/zookeeper-3.4.6/ && bin/zkServer.sh start
# 关闭
cd /opt/modules/zookeeper-3.4.6/ && bin/zkServer.sh stop
# 查看ZK服务状态
cd /opt/modules/zookeeper-3.4.6/ && bin/zkServer.sh status
# 重启ZK服务
cd /opt/modules/zookeeper-3.4.6/ && bin/zkServer.sh restart