ZooKeeper

其實在Hadoop教學篇有講過相關建制，但為了文件乾淨，還是在這邊重寫一次

Hadoop Server

• hadoop5

• hadoop6

• hadoop7

安裝Zookeeper

先進入hadoop user

$ su hadoop

下載Zookeeper 3.4.12到Hadoop5 Server的Hadoop User家目錄

$ wget http://apache.stu.edu.tw/zookeeper/stable/zookeeper-3.4.12.tar.gz
$ tar -xvzf zookeeper-3.4.12.tar.gz
$ mv zookeeper-3.4.12 zookeeper

配置zoo.conf

$ vi ~/zookeeper/conf/zoo.cfg 

變數內容

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/home/hadoop/zookeeper/data
clientPort=2181
server.1=hadoop5:2888:3888
server.2=hadoop6:2888:3888
server.3=hadoop7:2888:3888

將Zookeeper從hadoop5 Server複製到其他Server的hadoop User家目錄

$ scp -r ~/zookeeper hadoop6:/home/hadoop/
$ scp -r ~/zookeeper hadoop7:/home/hadoop/

配置MyId

配置hadoop5 Server MyId

$ echo 1 > ~/zookeeper/data/myid

配置hadoop6 Server MyId

$ echo 2 > ~/zookeeper/data/myid

配置hadoop7 Server MyId

$ echo 3 > ~/zookeeper/data/myid

啟動

啟動hadoop 5 - 7 Zookeeper

$ ~/zookeeper/bin/zkServer.sh start

檢查hadoop 5 - 7 Zookeeper是否有運行

有看到QuorumPeerMain就代表有運行

$ jps
2987 Jps
2045 QuorumPeerMain

檢查port是否有開啟

$ netstat -tulnp | grep 2181
tcp6       0      0 :::2181                 :::*                    LISTEN      2045/java