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ZOOKEEPER.md

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Install Hadoop Cluster

References

...

Machines

machine ip address os hostname
master 192.168.56.150 centos 7 aiden-master
slave1 192.168.56.151 centos 7 aiden-slave1
slave2 192.168.56.152 centos 7 aiden-slave2

Prerequisites

  • N/A

Installation

Run

tar xzvf apache-zookeeper-3.5.7-bin.tar.gz  -C /usr/local
mv /usr/local/apache-zookeeper-3.5.7-bin /usr/local/zookeeper-3.5.7

vi ~/.bashrc

export ZK_HOME=/usr/local/zookeeper-3.5.7
export PATH=$PATH:$ZK_HOME/bin

Configuration

Create Data folder

mkdir -p /root/zookeeper

Create myid file.

  • aiden-master
echo '1' > /root/zookeeper/myid
  • aiden-slave1
echo '2' > /root/zookeeper/myid
  • aiden-slave2
echo '3' > /root/zookeeper/myid

For replicated mode, a minimum of three servers are required, and it is strongly recommended that you have an odd number of servers.

Create zoo.cfg

vi  /usr/local/zookeeper-3.5.7/conf/zoo.cfg

tickTime=2000
dataDir=/root/zookeeper
clientPort=2181
initLimit=5
syncLimit=2
server.1=aiden-master:2888:3888
server.2=aiden-slave1:2888:3888
server.3=aiden-slave2:2888:3888

Start Zookeeper

Run in all machines

bin/zkServer.sh start

Check

  • zkServer.sh status
[root@aiden-master zookeeper-3.5.7]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader

[root@aiden-slave1 zookeeper-3.5.7]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
  • JPS
[root@aiden-master ~]# jps
...
4204 QuorumPeerMain

[root@aiden-slave1 ~]# jps
...
3428 QuorumPeerMain

client

Run zkCli

bin/zkCli.sh -server 127.0.0.1:2181