本文介绍的是伪集群安装，即在一台机器上模拟３个zookeeper server的集群安装。

１、下载解压

将下载下来的zookeeper解压重命名，如zk1，zk2，zk3，并且我是放在/opt/zookeeper/路径下的。

２、逐个编辑每个zk的conf/zoo.cfg配置文件

/opt/zookeeper/zk1/conf/zoo.cfg内容如下：

# 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=/opt/zookeeper/zk1/data
dataLog=/opt/zookeeper/zk1/log
# 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=10.8.12.147:20881:30881
#server.2=10.8.12.147:20882:30882
#server.3=10.8.12.147:20883:30883
server.1=localhost:20881:30881
server.2=localhost:20882:30882
server.3=localhost:20883:30883

/opt/zookeeper/zk2/conf/zoo.cfg内容如下：

# 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=/opt/zookeeper/zk2/data
dataLog=/opt/zookeeper/zk2/log
# the port at which the clients will connect
clientPort=2182
# 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=10.8.12.147:20881:30881
#server.2=10.8.12.147:20882:30882
#server.3=10.8.12.147:20883:30883
server.1=localhost:20881:30881
server.2=localhost:20882:30882
server.3=localhost:20883:30883

/opt/zookeeper/zk3/conf/zoo.cfg内容如下：

# 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=/opt/zookeeper/zk3/data
dataLog=/opt/zookeeper/zk3/log
# the port at which the clients will connect
clientPort=2183
# 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=10.8.12.147:20881:30881
#server.2=10.8.12.147:20882:30882
#server.3=10.8.12.147:20883:30883
server.1=localhost:20881:30881
server.2=localhost:20882:30882
server.3=localhost:20883:30883

2.1 因为是本地，所以用localhost，这里三个localhost分别是三台服务器的内网ip地址（如果分别部署在不同的机器）

2.2 20881、20882、20883端口号是zookeeper服务之间通信的端口，表示的是这个服务器与集群中的leader服务器交换信息的端口

2.3 30881、30882、30883端口号表示的是万一集群中的leader服务器挂了，需要一个端口来重新进行选举，选出一个新的leader，这个端口就是用来执行选举时服务器相互通信的端口，集群的配置方式，由于ip都是一样，所以不同的 Zookeeper 实例通信端口号不能一样，所以要给它们分配不同的端口号。

3、事先创建data和log文件夹

4、在每个zookeeper server配置文件的dataDir所对应的目录下，必须创建一个名为myid的文件，其中的内容必须与zoo.cfg中server.x 中的x相同，即：
/opt/zookeeper/zk1/data/myid 中的内容为1，对应server.1中的1
/opt/zookeeper/zk2/data/myid 中的内容为2，对应server.2中的2
/opt/zookeeper/zk3/data/myid 中的内容为3，对应server.3中的3

5、启动测试

5.1 分别在三台zookeeper-3.4.9/bin/目录下执行：./zkServer.sh start
5.2 输入jps命令查看进程，其中，QuorumPeerMain是zookeeper进程，表示启动成功；
5.3 由于ZooKeeper集群启动的时候，每个结点都试图去连接集群中的其它结点，先启动的肯定连不上后面还没启动的，所以日志中出现的异常【[WorkerSender[myid=1]:QuorumCnxManager@382] - Cannot open channel to 2 at election address ****】属于正常现象，其他结点也会出现类似问题，直到最后一个节点启动时才不会出现这种异常现象。

5.4 也可以查看集群中各个节点的角色（Leader或者Follower），如下所示，在ZooKeeper集群中的每个结点的zookeeper-3.4.９目录下执行./bin/zkServer.sh status

6、停止服务

6.1 在各节点的zookeeper的bin目录下执行./bin/zkServer.sh stop
6.2 如果要重启zookeeper服务，则在各节点的zookeeper的bin目录下执行./bin/zkServer.sh restart

7、客户端连接命令

./zkCli.sh -server localhost:2181

原文链接：https://www.f2er.com/ubuntu/353028.html