ubuntu16配置ZooKeeper集群（这里用的是Zookeeper3.4.10）

1.安装jdk:https://my.oschina.net/u/3316387/blog/1615301\

2.下载ZooKeeper：https://archive.apache.org/dist/zookeeper/，然后早/opt下创建一个目录zookeeper，将下载好的文件解压到这个目录。

3.在zookeeper目录下创建data,dataLog两个目录

4.在data下创建文件myid,并写入1，其他的机器分别写上2，3......可以随便定义。

5.进入/opt/zookeeper/zookeeper-3.4.10/conf/,创建文件zoo.cfg,写入以下代码：

# 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=/tmp/zookeeper
# 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/data
dataLogDir=/opt/zookeeper/dataLog
server.1=192.168.1.201:2888:3888

server.2=192.168.1.202:2888:3888

server.3=192.168.1.203:2888:3888

说明：dataDir和dataLogDir需要自己创建，目录可以自己制定，对应即可。server.1中的这个1需要和192.168.1.201这个机器上的dataDir目录中的myid文件中的数值对应。server.2中的这个2需要和192.168.1.202这个机器上的dataDir目录中的myid文件中的数值对应。当然，数值你可以随便用，只要对应即可。2888和3888的端口号也可以随便用，因为在不同机器上，用成一样也无所谓。

6.进入/opt/zookeeper/zookeeper-3.4.10/bin/，编辑zkServer.sh 在程序的开头添加上:

export JAVA_HOME=/usr/lib/jvm/jdk1.8
export PATH=$JAVA_HOME/bin:$PATH

不添加会出现以下错误：

JMX enabled by default

Using config: /usr/local/zookeeper-3.4.6/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

7.最后启动zookeeper

sudo /opt/zookeeper/zookeeper-3.4.10/bin/zkServer.sh start

查看状态

sudo /opt/zookeeper/zookeeper-3.4.10/bin/zkServer.sh status