本文参考https://www.linuxidc.com/Linux/2016-09/135052.htm
1.创建/usr/local/zookeeper文件夹
mkdir /usr/local/zookeeper
2.进入/usr/local/zookeeper文件夹
cd /usr/local/zookeeper
3.下载zookeeper
wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz 也可以自己下载到本地，然后上传到服务器
4.解压zookeeper
tar -zxvf zookeeper-3.4.9.tar.gz
5.进入到 /usr/local/zookeeper/zookeeper-3.4.9/conf 目录中
cd zookeeper-3.4.9/conf/
6.复制 zoo_sample.cfg 文件的并命名为为 zoo.cfg：
cp zoo_sample.cfg zoo.cfg
7.用 vim 打开 zoo.cfg 文件并修改其内容为如下
vim zoo.cfg
# The number of milliseconds of each tick
# zookeeper 定义的基准时间间隔，单位：毫秒
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=/usr/local/zookeeper/zookeeper-3.4.9/data/data1
# 数据文件夹
dataDir=/usr/local/zookeeper/zookeeper-3.4.9/data/data1
# 日志文件夹
dataLogDir=/usr/local/zookeeper/zookeeper-3.4.9/logs/log1
# the port at which the clients will connect
# 客户端访问 zookeeper 的端口号
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
8.保存并关闭 zoo.cfg 文件:
按esc后，:wq 回车
9.进入到 根目录中
cd
10.用 vim 打开 /etc/ 目录下的配置文件 profile
vim /etc/profile
加入：
export ZOOKEEPER_HOME=/usr/local/services/zookeeper/zookeeper-3.4.9/
export PATH=$ZOOKEEPER_HOME/bin:$PATH
export PATH
11.使 /etc/ 目录下的 profile 文件即可生效
source /etc/profile
12.启动 zookeeper 服务
zkServer.sh start (不指定配置文件的话默认为conf/zoo.cfg)
如打印如下信息则表明启动成功：
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
13.常用的命令：
查询 zookeeper 状态 zkServer.sh status
关闭 zookeeper 服务 zkServer.sh stop
重启zookeeper 服务 zkServer.sh restart
配置单机多实例，需要复制一份zoo.cfg文件修改clientPort的端口号，修改dataDir 和 dataLogDir的路径，然后启动zookeeper，启动命令需要指定配置文件
zkServer.sh start ../conf/zooother.cfg
