1. zookeeper下载及解压
从官网下载zookeeper安装包 zookeeper-3.4.10.tar.gz 解压至以下文件夹下
/opt/application/zookeeper/
解压文件并拷贝以及重命名得到三个 zookeeper 目录
tar -zxvf zookeeper-3.4.10.tar.gz
zookeeper01 zookeeper02 zookeeper03
2. 修改zookeeper配置
将 zookeeper01，zookeeper02，zookeeper03 以下 conf 目录下的 zoo_sample.cfg 拷贝并重命名为 zoo.cfg
cp zoo_sample.cfg zoo.cfg
修改三个目录下的 zoo.cfg 文件内容如下：
# zookeeper01/conf/zoo.cfg
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/opt/application/zookeeper/data/zookeeper01
clientPort=12181
server.1=127.0.0.1:12888:13888
server.2=127.0.0.1:22888:23888
server.3=127.0.0.1:32888:33888
# zookeeper02/conf/zoo.cfg
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/opt/application/zookeeper/data/zookeeper02
clientPort=22181
server.1=127.0.0.1:12888:13888
server.2=127.0.0.1:22888:23888
server.3=127.0.0.1:32888:33888
# zookeeper03/conf/zoo.cfg
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/opt/application/zookeeper/data/zookeeper03
clientPort=32181
server.1=127.0.0.1:12888:13888
server.2=127.0.0.1:22888:23888
server.3=127.0.0.1:32888:33888
3. 分别添加 myid 三个文件至 dataDir 目录下
cat /opt/application/zookeeper/data/zookeeper03/myid
3
4. 启动 zookeeper
分别启动三个 zookeeper，进入 zookeeper0X/bin 目录下，执行以下指令：
./zkServer.sh start
5. 客户端读写测试
任意进入其中一个 zookeeper 的 bin 目录，如 zookeeper01/bin，执行命令：
./zkCli.sh -server 127.0.0.1:12181
添加 zookeeper 节点，如下，观察到节点 /zk-book 已创建成功，且存储 HelloWorld 的字符串
[zk: 127.0.0.1:12181(CONNECTED) 2] create /zk-book HelloWorldCreated /zk-book
[zk: 127.0.0.1:12181(CONNECTED) 3] get /zk-book
HelloWorld
cZxid = 0x200000011
ctime = Tue Dec 12 13:57:34 CST 2017
mZxid = 0x200000011
mtime = Tue Dec 12 13:57:34 CST 2017
pZxid = 0x200000011
cversion = 0dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 10
numChildren = 0
退出后链接另外一个 zookeeper
./zkCli.sh -server 127.0.0.1:22181
获取之前创建的节点 /zk-book
[zk: 127.0.0.1:22181(CONNECTED) 0] get /zk-book
HelloWorld
cZxid = 0x200000011
ctime = Tue Dec 12 13:57:34 CST 2017
mZxid = 0x200000011
mtime = Tue Dec 12 13:57:34 CST 2017
pZxid = 0x200000011
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 10
numChildren = 0
观察到能够读取到从另外一个节点写入的数据，确认单台机器下的集群环境搭建成功。
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