Setting up Apache Hadoop Single Node Cluster

This guide will help you to install a single node Apache Hadoop cluster on your machine.

System Requirements

  • Ubuntu 16.04
  • Java 8 Installed

1. Download Hadoop

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wget https://archive.apache.org/dist/hadoop/core/hadoop-2.7.0/hadoop-2.7.0.tar.gz

2. Prepare for Installation

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tar xfz hadoop-2.7.0.tar.gz
sudo mv hadoop-2.7.0 /usr/local/hadoop

3. Create Dedicated Group and User

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sudo addgroup hadoop
sudo adduser --ingroup hadoop hduser
sudo adduser hduser sudo

4. Switch to Newly Created User Account

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su -hduser

5. Add Variables to ~/.bashrc

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#Begin Hadoop Variables

export JAVA_HOME=/usr/lib/jvm/java-8-oracle
export HADOOP_HOME=/usr/local/hadoop
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"

#End Hadoop Variables

6. Source ~/.bashrc

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source ~/.bashrc

7. Set Java Home for Hadoop

  • Open the file : /usr/local/hadoop/etc/hadoop/hadoop-env.sh
  • Find and edit the line as :
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export JAVA_HOME=/usr/lib/jvm/java-8-oracle
```

#### 8. Edit core-site.xml

* Open the file: /usr/local/hadoop/etc/hadoop/core-site.xml
* Add following lines between _<configuration> ... </configuration>_ tags.

fs.default.name
hdfs://localhost:9000

#### 9. Edit yarn-site.xml

* Open the file: /usr/local/hadoop/etc/hadoop/yarn-site.xml
* Add following lines between _<configuration> ... </configuration>_ tags.

yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.nodemanager.aux-services.mapreduce.shuffle.class
org.apache.hadoop.mapred.ShuffleHandler

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#### 10. Edit mapred-site.xml

* Copy the mapred-site.xml template first using:

cp /usr/local/hadoop/etc/hadoop/mapred-site.xml.template /usr/local/hadoop/etc/hadoop/mapredsite.xml

* Open the file: /usr/local/hadoop/etc/hadoop/mapred-site.xml
* Add following lines between _<configuration> ... </configuration>_ tags.

fs.default.name
hdfs://localhost:9000

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#### 11. Edit hdfs-site.xml

First, we create following directories:

sudo mkdir -p /usr/local/hadoop_store/hdfs/namenode
sudo mkdir -p /usr/local/hadoop_store/hdfs/datanode
sudo chown hduser:hadoop -R /usr/local/hadoop_store
sudo chmod 777 -R /usr/local/hadoop_store

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Now open /usr/local/hadoop/etc/hadoop/hdfs-site.xml and enter the following content in between the tag <configuration></configuration>

dfs.replication
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dfs.namenode.name.dir
file:/usr/local/hadoop_store/hdfs/namenode
dfs.datanode.data.dir
file:/usr/local/hadoop_store/hdfs/datanode

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#### 12. Format NameNode

cd /usr/local/hadoop/
bin/hdfs namenode -format

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#### 13. Start Hadoop Daemons

cd /usr/local/hadoop/
sbin/start-dfs.sh
sbin/start-yarn.sh

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#### 14. Check Service Status

jps

```

15. Check Running Jobs

Type in browser’s address bar:

http://localhost:8088

Done!