三台服务器环境

192.168.1.15 192.168.1.21 192.168.1.22，确保防火墙关闭（宿主机防火墙也可能影响）。如果是虚拟机测试，确保虚拟机在同一网段，相互直接可以ping通

安装java jdk8以上版本并配置环境变量

创建目录并解压安装包

mkdir /software

下载zookeeper安装包并安装

apache-zookeeper-3.6.1-bin.tar.gz

1. 移动到/software目录下
2. 解压 tar -xvf apache-zookeeper-3.6.1-bin.tar.gz 并将解压目录重命名为 zookeeper
3. 在/software目录下创建 zkdata目录
4. 分别在三台服务器上写入
   echo 1 > zkdata/myid
   echo 2 > zkdata/myid
   echo 3 > zkdata/myid
5. 进入/software/zookeeper/conf目录 cp zoo_sample.cfg zoo.cfg
6. 修改zoo.cfg配置
   将原来dataDir配置的目录，修改为dataDir=/software/zkdata
   在配置文件末尾增加如下配置:
   server.1=192.168.1.15:2888:3888
   server.2=192.168.1.21:2888:3888
   server.3=192.168.1.22:2888:3888

启动zookeeper集群

bin/zkServer.sh start

查看zookeeper集群状态

192.168.1.21
ZooKeeper JMX enabled by default
Using config: /software/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
192.168.1.15
ZooKeeper JMX enabled by default
Using config: /software/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
192.168.1.22
ZooKeeper JMX enabled by default
Using config: /software/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower

至此，三个节点的zookeeper集群配置成功！