BigData--hadoop集群搭建之zookeer安装

Zookeeper安装
 cd /opt/
 tar -zxvf zookeeper-3.4.10.tar.gz
mv zookeeper-3.4.10  /opt/zookeeper
修改配置文件
cd /opt zookeeper-3.4.10/conf/
cp zoo_sample.cfg zoo.cfg
vim zoo.cfg
tickTime=2000
dataDir=/optzookeeper-3.4.10/data
clientPort=2181
initLimit=10
syncLimit=5
server.1=hadoop-1:2888:3888
server.2=hadoop-2:2888:3888
server.3=hadoop-3:2888:3888
所有节点修改环境变量量
vim /etc/profile.d/zookeeper.sh
# zookeeper
export ZOOKEEPER_HOME=/optzookeeper-3.4.10
export PATH=$ZOOKEEPER_HOME/bin:$PATH
 source /etc/profile
将zookeeper⽬目录复制到其他节点上
scp -r /opt/zookeeper-3.4.10/  root@hadoop-2:/opt/zookeeper-3.4.10
scp -r /opt/zookeeper-3.4.10/  root@hadoop-3:/opt/zookeeper-3.4.10
添加myid⽂文件(每节点都需要)
cd /opt/zookeeper-3.4.10
mkdir data
echo "1" > data/myid
注意，每个节点myid⽂文件要不不⼀一致
启动并测试
# 在三台机器器上分别执行行
zkServer.sh start
# 查看状态
[root@hadoop-1 zookeeper-3.4.10]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower
[root@hadoop-2 zookeeper-3.4.10]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: leader
[root@hadoop-3 zookeeper-3.4.10]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /optzookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower

注：3个节点允许一个节点当掉，5个节点允许2个节点同时当掉（选举机制过半数就是leader）