Apache Hadoop Docker

Docker can be a convenient way to run Apache Hadoop for development or testing purposes. Here are some steps to get you started:

1. Install Docker: Make sure you have Docker installed on your system. You can download and install Docker from the official website for your specific operating system.

2. Pull Hadoop Docker Image: You can find Docker images for Apache Hadoop on Docker Hub. To pull the official Hadoop image, you can use the following command:

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   docker pull sequenceiq/hadoop-docker:2.7.1


   This will download the Hadoop Docker image to your local system.

3. Run Hadoop Cluster: To run a Hadoop cluster inside Docker containers, you can use Docker Compose or manually start containers. Below is an example of a docker-compose.yml file to run a simple Hadoop cluster:

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   version: '2'
services:
namenode:
image: sequenceiq/hadoop-docker:2.7.1
container_name: namenode
ports:
- "50070:50070"
volumes:
- ./input:/input
- ./output:/output
command: /etc/bootstrap.sh -d

   datanode:
   image: sequenceiq/hadoop-docker:2.7.1
   container_name: datanode
   command: /etc/bootstrap.sh -d

   You can customize this configuration as per your requirements. Ensure that you have the necessary input and output directories specified.

4. Start the Cluster: Use the following command to start the Hadoop cluster:

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   docker-compose up


5. Access Hadoop Web UI: You can access the Hadoop web UI for the NameNode by opening a web browser and navigating to http://localhost:50070. This will allow you to monitor the Hadoop cluster.