下载zookeeper-3.5.8。选用apache-zookeeper-3.5.8-bin.tar.gz。
在物理机下载完之后，通过ftp服务，将压缩包发送至虚拟机。我习惯放在~/目录下，然后就地解压，这样不会涉及到权限的问题。

一、配置Zookeeper

1、查看配置文件夹：

[xiaoguan@master zookeeper-3.5.8-bin]$ cd conf
[xiaoguan@master conf]$ ls
configuration.xsl  log4j.properties  zoo_sample.cfg
[xiaoguan@master conf]$ 

[xiaoguan@slave1 ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
[xiaoguan@slave1 ~]$ 

2、生成配置文件

[xiaoguan@master conf]$ cp zoo_sample.cfg zoo.cfg
[xiaoguan@master conf]$ ls
configuration.xsl  log4j.properties  zoo.cfg  zoo_sample.cfg
[xiaoguan@master conf]$ 

3、编辑配置文件

---

# do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/home/xiaoguan/zookeeper-3.5.8/data dataLogDir=/home/xiaoguan/zookeeper-3.5.8/logs

# 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=192.168.48.135:4001:4002
server.2=192.168.48.136:4001:4002
server.3=192.168.48.137:4001:4002

---

说明：

• dataDir和dataLogDir需要在启动之前就创建好。
• clientPort 为 zookeeper的服务端口。
• server.0、server.1、server.2 为 zk 集群中三个结的信息，定义格式为 hostname:port1:port2，其中 port1 是 node 间通信使用的端口，port2 是node 选举使用的端口，需确保三台主机的这两个端口都是互通的。

二、更改日志配置

Zookeeper 默认会将控制台信息输出到启动路径下的 zookeeper.out 中，通过如下方法，可以让Zookeeper 输出按尺寸切分的日志文件：
1）修改/opt/zookeeper-3.4.12/conf/log4j.properties文件，将zookeeper.root.logger=INFO, CONSOLE改为zookeeper.root.logger=INFO, ROLLINGFILE
2）修改/opt/zookeeper-3.4.12/bin/zkEnv.sh文件，将ZOO_LOG4J_PROP=“INFO,CONSOLE” 改为ZOO_LOG4J_PROP=“INFO,ROLLINGFILE”

三、在master主机的 dataDir 路径下创建一个文件名为 myid 的文件

myid的内容为为该 zk 节点的编号：编号在zoo.cfg文件最后server.id。id就是编号。
server.1=192.168.48.135:4001:4002 master编号为1
server.2=192.168.48.136:4001:4002 slave编号为2
server.3=192.168.48.137:4001:4002 slave1编号为3

---

[xiaoguan@master zookeeper-3.5.8-bin]$ cd data
[xiaoguan@master data]$ ls
[xiaoguan@master data]$ touch myid
[xiaoguan@master data]$ vi myid
[xiaoguan@master data]$ more myid
1

---

四、将配置好的zookeeper发送至slave结点

---

[xiaoguan@master ~]$ ls
Desktop hadoop-2.7.2 Pictures spark-2.4.6-bin-hadoop2.7 zookeeper-3.5.8
Documents hadoopdata Public Templates 桌面
Downloads Music scala-2.13.2 Videos
[xiaoguan@master ~]$ scp -r zookeeper-3.5.8-bin/ xiaoguan@slave:~/
[xiaoguan@master ~]$ scp -r zookeeper-3.5.8-bin/ xiaoguan@slave1:~/

---

然后修改下slave的myid文件：

---

[xiaoguan@master ~]$ ssh slave
Last login: Thu Jun 18 23:29:01 2020 from master
[xiaoguan@slave ~]$ ls
Desktop hadoop-2.7.2 Pictures spark-2.4.6-bin-hadoop2.7 zookeeper-3.5.8
Documents hadoopdata Public Templates 桌面
Downloads Music scala-2.13.2 Videos
[xiaoguan@slave ~]$ vi zookeeper-3.5.8-bin/data/myid
[xiaoguan@slave ~]$ more zookeeper-3.5.8-bin/data/myid
2
[xiaoguan@slave ~]$ logout
Connection to slave closed.
[xiaoguan@master ~]$ ssh slave1
Last login: Thu Jun 18 21:40:17 2020 from master
[xiaoguan@slave1 ~]$ vi zookeeper-3.5.8-bin/data/myid
[xiaoguan@slave1 ~]$ more zookeeper-3.5.8-bin/data/myid
3

---

五、启动zookeeper

在每个结点上执行./zkServer.sh start。该命令再zookeeper的bin目录下。然后使用jps命令可以看到两个进程：

---

[xiaoguan@master logs]$ jps
3440 QuorumPeerMain
3737 Jps

[xiaoguan@slave1 ~]$ jps
3317 QuorumPeerMain
3687 Jps

[xiaoguan@slave ~]$ jps
3851 Jps
3423 QuorumPeerMain

---

在每个结点上都有查看一下，每个结点上都有两个进程。这样集群就启动成功了。

六、查看集群的状态

使用命令./zkServer.sh status。如下，可以看到master和slave是follower，而slave1是leader。

---

[xiaoguan@master bin]$ ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
[xiaoguan@master bin]$ ssh slave
Last login: Fri Jun 19 12:59:07 2020 from master
[xiaoguan@slave ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
[xiaoguan@slave ~]$ logout
Connection to slave closed.
[xiaoguan@master bin]$ ssh slave1
Last login: Fri Jun 19 12:58:43 2020 from master
[xiaoguan@slave1 ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader

---

七、检查集群的高可用性

首先关掉集群中的leader也就是slave1：

---

[xiaoguan@slave1 ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Stopping zookeeper … STOPPED

---

然后查看集群的状态：

---

[xiaoguan@master zookeeper-3.5.8-bin]$ ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
[xiaoguan@master zookeeper-3.5.8-bin]$ ssh slave
Last login: Fri Jun 19 13:07:52 2020 from master
[xiaoguan@slave ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
[xiaoguan@slave ~]$

---

可以看到，此时Master被选为leader。然后再次打开slave1结点，此时slave1应该为follower：

---

[xiaoguan@slave1 ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Starting zookeeper … STARTED
[xiaoguan@slave1 ~]$ ./zookeeper-3.5.8-bin/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/xiaoguan/zookeeper-3.5.8-bin/bin/…/conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
[xiaoguan@slave1 ~]$

---

此时，Zookeeper 集群的安装及高可用性验证已完成！

参考

Kafka：ZK+Kafka+Spark Streaming集群环境搭建（八）安装zookeeper-3.4.12