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1，准备：
A:三台linxu服务器：
10.112.29.177
10.112.29.172
10.112.29.174
命令 hostname 得到每台机器的 hostname
vm-10-112-29-177
vm-10-112-29-172
vm-10-112-29-174
分别创建
/opt/zookeeper/server1/data
/opt/zookeeper/server1/dataLog
/opt/zookeeper/server2/data
/opt/zookeeper/server2/dataLog
/opt/zookeeper/server3/data
/opt/zookeeper/server3/dataLog
B:下载zookeeper
版本：zookeeper-3.4.8.tar.gz
解压 tar -zxvf zookeeper-3.4.8.tar.gz
zookeeper-3.4.8
C:下载jdk
版本： jdk-7u80-linux-x64.gz
解压 tar -zxvf jdk-7u80-linux-x64.gz
jdk1.7.0_80
D:配置java环境变量
/etc/profile 文件中加入：
export JAVA_HOME=/usr/java/jdk1.7.0_80
export PATH=$PATH:/usr/java/jdk1.7.0_80/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)
# 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/server1/data
dataLogDir=/opt/zookeeper/server1/dataLog
server.1=vm-10-112-29-177:2888:3888server.2=vm-10-112-29-172:2888:3888server.3=vm-10-112-29-174:2888:3888# 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
dataDir=/opt/zookeeper/server2/data
dataLogDir=/opt/zookeeper/server2/dataLog
dataDir=/opt/zookeeper/server3/data
dataLogDir=/opt/zookeeper/server3/dataLog
tickTime：zookeeper中使用的基本时间单位, 毫秒值。initLimit：这个配置项是用来配置 Zookeeper 接受客户端（这里所说的客户端不是用户连接 Zookeeper 服务器的客户端，而是 Zookeeper 服务器集群中连接到 Leader 的 Follower 服务器）初始化连接时最长能忍受多少个 tickTime 时间间隔数。这里设置为5表名最长容忍时间为 5 * 2000 = 10 秒。syncLimit：这个配置标识 Leader 与 Follower 之间发送消息，请求和应答时间长度，最长不能超过多少个 tickTime 的时间长度，总的时间长度就是 2 * 2000 = 4 秒。dataDir 和 dataLogDir 看配置就知道干吗的了，不用解释。clientPort：监听client连接的端口号，这里说的client就是连接到Zookeeper的代码程序。server.{myid}={ip}:{leader服务器交换信息的端口}:{当leader服务器挂了后, 选举leader的端口}maxClientCnxns：对于一个客户端的连接数限制，默认是60，这在大部分时候是足够了。但是在我们实际使用中发现，在测试环境经常超过这个数，经过调查发现有的团队将几十个应用全部部署到一台机器上，以方便测试，于是这个数字就超过了。修改zoo.cfg非常简单，然后还需要创建myid文件：cd server1echo 1 > myid然后拷贝server1为server2和server3，并修改其中的zoo.cfg配置，当然也要修改myid的内容为2和3。下面给出3个server的zoo.cfg 内容：# server1tickTime=2000initLimit=5syncLimit=2dataDir=/opt/zookeeper/server1/datadataLogDir=/opt/zookeeper/server1/dataLogclientPort=2181server.1=vm-10-112-29-177:2888:3888server.2=vm-10-112-29-172:2888:3888server.3=vm-10-112-29-174:2888:3888
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原文地址：http://www.cnblogs.com/8899man/p/5743710.html
