Zookeeper 3.4.6. Installation & Configuration

Apache Zookeeper is a distributed co-ordination service to manage large set of hosts. It is essentially a centralized service for distributed systems to a hierarchical key-value store, which is used to provide a distributed configuration service, synchronization service, and naming registry for large distributed systems.

Prerequisites

Java 8

Downloading and Installing Zookeeper

Download zookeeper-3.4.6 using below command on /usr/local directory.

$ cd /usr/local $ sudo wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.6/ zookeeper-3.4.6.tar.gz

Unpack the compressed tar file by using this command

$ sudo tar –xvzf zookeeper-3.4.6.tar.gz

Rename zookeeper-3.4.6 directory to zookeeper in /usr/local directory by using give command.

$ sudo mv zookeeper-3.4.6 zookeeper

Setting up Zookeeper Environment Variables

First we need to set environment variable for zookeeper. Edit ~/.bashrc file.

$ sudo nano ~/.bashrc

Append following values at end of file and save the file.

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

Change the ownership and permissions of the directory /usr/local/zookeeper

$ sudo chown -R hdfs:hdfs /usr/local/zookeeper $ sudo chmod -R 755 /usr/local/zookeeper

Reload the configuration file ~/.bashrc with the following command.

$ source ~/.bashrc

Start zookeeper services

Start Zookeeper service using this command.

$ zkServer.sh start

Showing Zookeeper is starting.

JMX enabled by default Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED