How Debian integrates Hadoop with other tools

This guide details how to integrate Hadoop and other tools on the Debian system, covering key steps such as Java environment construction, Hadoop configuration, cluster startup and management.

1. Java environment preparation

First, make sure that your system has Java 8 or higher installed. Install OpenJDK 8 using the following command:

 sudo apt update
sudo apt install openjdk-8-jdk

Verify installation:

 java -version

2. Hadoop download and decompression

Download the latest version of Hadoop installation package (such as Hadoop 3.3.1) from the Apache Hadoop official website and unzip it to the specified directory (such as /usr/local/hadoop ):

 wget https://downloads.apache.org/hadoop/common/hadoop-3.3.1/hadoop-3.3.1.tar.gz
tar -xzvf hadoop-3.3.1.tar.gz -C /usr/local/hadoop

3. Environment variable configuration

Edit the ~/.bashrc file and add the following environment variables:

 export JAVA_HOME=/usr/lib/jvm/jdk-8-openjdk-amd64
export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

Make the configuration take effect:

 source ~/.bashrc

4. Hadoop core configuration

Modify Hadoop core configuration files ( core-site.xml , hdfs-site.xml , mapred-site.xml , yarn-site.xml ). The following is an example configuration:

core-site.xml :

<configuration>
  <property>
    <name>fs.defaultFS</name>
    <value>hdfs://namenode:9000</value>
  </property>
</configuration>

hdfs-site.xml :

<configuration>
  <property>
    <name>dfs.replication</name>
    <value>3</value>
  </property>
  <property>
    <name>dfs.namenode.name.dir</name>
    <value>/usr/local/hadoop/dfs/name</value>
  </property>
  <property>
    <name>dfs.datanode.data.dir</name>
    <value>/usr/local/hadoop/dfs/data</value>
  </property>
</configuration>

mapred-site.xml :

<configuration>
  <property>
    <name>mapreduce.framework.name</name>
    <value>yarn</value>
  </property>
</configuration>

yarn-site.xml :

<configuration>
  <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>
</configuration>

5. HDFS formatting

On the NameNode node, execute the following command to format HDFS:

 hdfs namenode -format

6. Hadoop service starts

Start Hadoop service on NameNode:

 start-dfs.sh
start-yarn.sh

7. Installation verification

Execute the following command to verify that Hadoop is started successfully:

 hdfs dfs -ls /

Or access the Hadoop management interface.

8. Cluster configuration and management

This step involves inter-node network configuration, storage space configuration, JVM parameter optimization, job scheduling policy setting, and cluster monitoring and management using tools such as Ambari or Cloudera Manager.

Through the above steps, you can successfully build and manage Hadoop clusters on the Debian system. Please adjust the configuration parameters according to your actual environment.

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