完全分布式下的zookeeper配置

前言：

        事先已经配置好了3台hadoop集群，分别为hadoop200、hadoop201、hadoop202

1 zookeeper的安装与配置环境变量

 配置环境变量：

把如下代码插入到~/.bashrc文件末尾

export ZOOKEEPER_HOME=/usr/local/zookeeper
export PATH=$PATH:${ZOOKEEPER_HOME}/bin:${ZOOKEEPER_HOME}

然后使用source ~/.bashrc 使之生效

将解压好的zookeeper文件夹和~/.bashrc 更新到其他节点上:

rsync -rvl /usr/local/zookeeper hadoop@hadoop201:/usr/local
rsync -rvl /usr/local/zookeeper hadoop@hadoop202:/usr/local

rsync -rvl ~/.bashrc hadoop@hadoop201:~/.bashrc
rsync -rvl ~/.bashrc hadoop@hadoop202:~/.bashrc

别忘了更新过后的~/.bashrc记得source一下

2 zookeeper的配置

2.1 配置myid

 进入zookeeper目录下创建zkData目录，然后再zkData下创建myid文件

2.2 配置zoo.cfg

 然后进入zookeeper/conf复制一份zoo_sample.cfg并重新命名为zoo.cfg

然后将如下内容添加其中：

# 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=/usr/local/zookeeper/zkData #这里是zookeeper的数据路径
# 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
 
#.200 .201是myid里面设置的id  hadoop200 hadoop201是自己的主机名
server.200=hadoop200:2888:3888
server.201=hadoop201:2888:3888
server.202=hadoop202:2888:3888

然后分发到其他节点（更新了zkData文件和conf/zoo.cfg文件）：

rsync -rvl /usr/local/zookeeper/ hadoop@hadoop201:/usr/local/zookeeper/
rsync -rvl /usr/local/zookeeper/ hadoop@hadoop202:/usr/local/zookeeper/

最后进入其余节点更改myid里面的内容为201和202

最后启动zookeeper