BigData: 05/03/16

Tuesday, May 3, 2016

Zookeeper Installation Guide

Environment Setup

1.1 Install Java 1.6+ version
1.2 Install latest Apache stable build
1.3 Download Zookeeper stable version

Zookeeper Installation

Download the stable version of HBase. In our case it is HBase 0.94.16.

Execute following command to download HBase 0.94.16

wget  http://apache.mirror.quintex.com/zookeeper/stable/zookeeper-3.4.5.tar.gz

Unzip the compressed hbase file by executing the following command:
```
tar -xvzf zookeeper-3.4.5.tar.
```
Login as root and create a directory “zookeeper”, Change the ownership of this directory to the hadoop user “hduser” and group “hadoop”. This is done mainly for our convenience, to differentiate each framework, software and application with different users. Execute the following commands
```
cd /usr/local
mkdir zookeeper
chown -R hduser:hadoop /usr/local/zookeeper
```
Copy the unzipped zookeeper binaries into /usr/local/zookeeper folder
```
mv zookeeper-3.4.5 /usr/local/
```
To start zookeeper, you need a configuration file. Create a configuration file named, zoo.cfg file in the path /usr/local/zookeeper/conf. Eexcute the following commands
```
cd /usr/local/zookeeper/zookeeper-3.4.5/conf
vi zoo.cfg
```

Add the following entries to the file.

tickTime=2000
dataDir=/usr/local/zookeeper/data
clientPort=2181

Start Zookeeper by executing the following command.

./zkServer.sh start
JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

Zookeeper is now set up and is ready for further use. Zookeeper logs messages using.
The steps outlined here run Zookeeper in standalone mode. There is no replication, so if Zookeeper process fails, the service will go down.

Stop Zookeeper by executing the following command.

./zkServer.sh stop
JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-3.4.5/bin/../conf/zoo.cfg
Stopping zookeeper ... ./zkServer.sh: line 143: kill: (6411) - No such process
STOPPED