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Apache Hadoop Docker image

This docker image is most suitable for DC/OS. Container of this image start by accepting hadoop daemon name as a parameter. It will run image with given hadoop-daemon only.

Quick Start

To build the docker image, run:

  docker build -t <docker_id>/hadoop:2.7.7 .

To run the docker image, run:

  docker run -ti <docker_id>/hadoop:2.7.7 <hadoop_daemon> <args>

Configure Environment Variables

The configuration parameters can be specified in the hadoop.env file or as environmental variables for specific services (e.g. namenode, datanode etc.):

  CORE_CONF_fs_defaultFS=hdfs://namenode:8020

CORE_CONF corresponds to core-site.xml. fs_defaultFS=hdfs://namenode:8020 will be transformed into:

  <property><name>fs.defaultFS</name><value>hdfs://namenode:8020</value></property>

To define dash inside a configuration parameter, use triple underscore, such as YARN_CONF_yarn_log___aggregation___enable=true (yarn-site.xml):

  <property><name>yarn.log-aggregation-enable</name><value>true</value></property>

The available configurations are:

  • /etc/hadoop/core-site.xml CORE_CONF
  • /etc/hadoop/hdfs-site.xml HDFS_CONF
  • /etc/hadoop/yarn-site.xml YARN_CONF
  • /etc/hadoop/httpfs-site.xml HTTPFS_CONF
  • /etc/hadoop/kms-site.xml KMS_CONF

If you need to extend some other configuration file, refer to entrypoint.sh script.