Apache Hadoop 2.x.x Installation

Steps to install Hadoop 2.2.0 Stable release (Single Node Cluster)

Steps to install Hadoop 2.2.0 release (Yarn) on single node cluster setup

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1. Prerequisites:

1. Java 6

2. Dedicated unix user(hadoop) for hadoop

3. SSH configured

4. hadoop 2.x tarball ( hadoop-2.2.0.tar.gz )

Lazy ?? : Check this install-hadoop

2.Installation

$ tar -xvzf hadoop-2.2.0.tar.gz

$ mv hadoop-2.2.0 /home/hadoop/yarn/hadoop-2.2.0

$ cd /home/hadoop/yarn

$ sudo chown -R hadoop:hadoop hadoop-2.2.0

$ sudo chmod -R 755 hadoop-2.2.0

3. Setup Environment Variables in .bashrc (optional)

# Setup for Hadoop 2.0 .

export HADOOP_HOME=$HOME/yarn/hadoop-2.2.0
export HADOOP_MAPRED_HOME=$HOME/ yarn /hadoop-2.2.0
export HADOOP_COMMON_HOME=$HOME/ yarn /hadoop-2.2.0
export HADOOP_HDFS_HOME=$HOME/ yarn /hadoop-2.2.0
export YARN_HOME=$HOME/ yarn /hadoop-2.2.0
export HADOOP_CONF_DIR=$HOME/yarn/hadoop-2.2.0/etc/hadoop

After Adding these lines at bottom of the .bashrc file

$ source .bashrc

4. Create Hadoop Data Directories

# Two Directories for name node and datanode .

$ mkdir -p $HOME/yarn/yarn_data/hdfs/namenode

$ mkdir -p $HOME/yarn/yarn_data/hdfs/datanode

5. Configuration

# Base Directory .

$ cd $YARN_HOME

$ vi etc/hadoop/yarn-site.xml

Add the following contents inside configuration tag

# etc/hadoop/yarn-site.xml .

<property>

  <name>yarn.nodemanager.aux-services</name>

  <value>mapreduce_shuffle</value>

</property>

<property>

  <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>

  <value>org.apache.hadoop.mapred.ShuffleHandler</value>

</property>

$ vi etc/hadoop/core-site.xml

Add the following contents inside configuration tag

# etc/hadoop/core-site.xml .<property>   <name>fs.default.name</name>   <value>hdfs://localhost:9000</value></property>

$ vi etc/hadoop/hdfs-site.xml

Add the following contents inside configuration tag

# etc/hadoop/hdfs-site.xml . <property>   <name>dfs.replication</name>   <value>1</value> </property> <property>   <name>dfs.namenode.name.dir</name>   <value>file:/home/hadoop/yarn/yarn_data/hdfs/namenode</value> </property> <property>   <name>dfs.datanode.data.dir</name>   <value>file:/home/hadoop/yarn/yarn_data/hdfs/datanode</value> </property>

$ vi etc/hadoop/mapred-site.xml

If this file does not exist, create it and paste the content provided below:

# etc/hadoop/mapred-site.xml .<?xml version="1.0"?><configuration>   <property>      <name>mapreduce.framework.name</name>      <value>yarn</value>   </property></configuration>

6. Format namenode(Onetime Process)

# Command for formatting Name node.$ bin/hadoop namenode -format

7. Starting HDFS processes and Map-Reduce Process

# HDFS(NameNode & DataNode).$ sbin/hadoop-daemon.sh start namenode$ sbin/hadoop-daemon.sh start datanode

# MR(Resource Manager, Node Manager & Job History Server).$ sbin/yarn-daemon.sh start resourcemanager$ sbin/yarn-daemon.sh start nodemanager$ sbin/mr-jobhistory-daemon.sh start historyserver

8. Verifying Installation

$ jps

# Console Output.22844 Jps28711 DataNode29281 JobHistoryServer28887 ResourceManager29022 NodeManager28180 NameNode

Running Word count Example Program

$ mkdir input

$ cat > input/fileThis is word count exampleusing hadoop 2.2.0

Add input directory to HDFS:

$ bin/hadoop hdfs -copyFromLocal input /input

Note : If hdfs shows error use dfs instead

Run wordcount example jar provided in HADOOP_HOME:

$ bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar wordcount /input /output

Check the output at web interface

http://localhost:50070

Browse HDFS dir for /output folder

8. Verifying Installation

# Commands.$ sbin/hadoop-daemon.sh stop namenode$ sbin/hadoop-daemon.sh stop datanode$ sbin/yarn-daemon.sh stop resourcemanager$ sbin/yarn-daemon.sh stop nodemanager$ sbin/mr-jobhistory-daemon.sh stop historyserver