Encryption is must when storing data obtained from IoT devices.
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To install hadoop
->install java-jdk 8.
->install hadoop 3.2.3 from hadoop archive.
->customize the shell environment in Linux with:: sudo nano .bashrc
-> copy and pase these in the end of the file
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export PATH=$PATH:/usr/lib/jvm/java-8-openjdk-amd64/bin
export HADOOP_HOME=~/hadoop-3.2.3/
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib/native"
export HADOOP_STREAMING=$HADOOP_HOME/share/hadoop/tools/lib/hadoop-streaming-3.2.3.jar
export HADOOP_LOG_DIR=$HADOOP_HOME/logs
export PDSH_RCMD_TYPE=ssh
->open hadoop-env.sh:: sudo nano hadoop-env.sh and add this line JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
->open core-site.xml:: sudo nano core-site.xml and add these lines
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
<property>
<name>hadoop.proxyuser.dataflair.groups</name <value>*</value>
</property>
<property>
<name>hadoop.proxyuser.dataflair.hosts</name <value>*</value>
</property>
<property>
<name>hadoop.proxyuser.server.hosts</name <value>*</value>
</property>
<property>
<name>hadoop.proxyuser.server.groups</name <value>*</value>
</property>
</configuration>
--> open hdfs-site.xml:: sudo nano hdfs-site.xml and these lines
<configuration>
<property>
<name>dfs.replication</name><value>1</value>
</property>
</configuration>
--> open mapred-site.xml:: sudo nano mapred-site.xml and these lines
<configuration>
<property>
<name>mapreduce.framework.name</name> <value>yarn</value>
</property>
<property>
<name>mapreduce.application.classpath</name>
<value>$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/:$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/lib/</value>
</property>
</configuration>
--> open yarn-site.xml:: sudo nano yarn-site.xml and these lines
<configuration>
<!-- Site specific YARN configuration properties -->
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.env-whitelist</name>
<value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREP END_DISTCACHE,HADOOP_YARN_HOME,HADOOP_MAPRED_HOME</value>
</property>
</configuration>
--> To start hadoop use start-all.sh
-->To stop hadoop use stop-all.sh
--> Open project using IntelliJ, and install maven.
--> Now clean and install maven to get the jar file.
--> Now First generate RSA keys with hadoop jar target/HadoopEncryption-1.0-SNAPSHOT.jar org.hadoopEncryption.RSA
--> Now generate AES keys with hadoop jar target/HadoopEncryption-1.0-SNAPSHOT.jar org.hadoopEncryption.AES
--> To Encrypt file and store it into hadoop use
hadoop jar target/HadoopEncryption-1.0-SNAPSHOT.jar org.hadoopEncryption.aesEncryptJob file:///home/ubuntu/plain_text_file.txt output_file_name_must_be_unique_for_every_use
--> To Decrypt file and store it into hadoop use
hadoop jar target/HadoopEncryption-1.0-SNAPSHOT.jar org.hadoopEncryption.aesDecryptJob file:///home/ubuntu/cipher_text_file.txt output_file_name_must_be_unique_for_every_use
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