访问zookeeper官网下载最新、稳定zookeeper版本
将下载二进制文件分别上传至需要安装的服务器上(以下操作需要在所有节点执行)
创建zookeeper目录
mkdir /software/data/
将二进制文件上传至/software/data/目录
解压文件：
tar xf apache-zookeeper-3.5.5-bin.tar.gz
重命名
mv apache-zookeeper-3.5.5-bin zookeeper
cd zookeeper
创建logs和data目录
mkdir logs data
进入conf目录修改以下配置
cd conf
cp zoo_sample.cfg zoo.cfg
vim 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=/software/data/zookeeper/data #修改
dataLogDir=/software/data/zookeeper/logs #新增
# the port at which the clients will connect
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
server.1=192.168.1.102:2881:3881 #新增
server.2=192.168.1.103:2881:3881 #新增 三台机器的新增内容都需要一致
server.3=192.168.1.105:2881:3881 #新增
新增myid文件
除了修改 zoo.cfg 配置文件，集群模式下还要新增一个名叫myid的文件，这个文件放在上述dataDir指定的目录下，这个文件里面就只有一个数据，就是上图配置中server.x的这个x（1,2,3）值，zookeeper启动时会读取这个文件，拿到里面的数据与 zoo.cfg 里面的配置信息比较从而判断到底是那个server（节点）。
cd /software/data/zookeeper/data/
cat myid
1 #node1节点的值就为1，node2为2，node3为3
设置zookeeper java环境
vim /software/data/zookeeper/bin/zkEnv.sh
新增：
export JAVA_HOME=/software/data/jdk1.8.0_231
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
export CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar
启动zookeeper服务
/software/data/zookeeper/bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /software/data/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
/software/data/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /software/data/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
