Zookeeper Installation in Hadoop cluster

Zookeeper Installation

 Zookeeper is a high-performance coordinator for distributed applications. It provide configuration information, naming, distributed synchronization and group services as centralized service. It will start and stop the zookeeper as part of the HBase start/stop process.

For single node HBase installation, built in zookeeper is automatically installed and started. For multimode HBase installation, we have to install zookeeper manually.

Copy the zookeeper tar file (zookeeper-3.4.5.tar.gz) in the same location where HBase and Hadoop in installed.

Ø    cd /home/hduser/utilities

Ø    tar –xzvf  zookeeper-3.4.5.tar.gz

  Edit the zoo.cfg file in zookeeper/conf folder

Ø    cd zookeeper/conf

If the zoo.cfg file is not there, create that file from zoo_sample.cfg

Ø    cp zoo_sample  zoo.cfg

                         

Edit the zoo.cfg file

Ø    nano /home/hduser/zookeeper/conf/zoo.cfg

                            

If the dataDir is not exist in that location, we have to create that location. Here dataDir is in ‘/var/zookeeper’ location

 Start Zookeeper

Ø    /home/hduser/zookeeper/bin/zkServer.sh start