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Browse documentation for IT-systems used by the European Environment Agency and the Eionet network.

Jenkins Slave with Docker Engine and Docker Compose inside (Jenkins Swarm


Docker images for Jenkins Slave with Docker Engine and Docker Compose inside.

Works best in combination with eeacms/jenkins- master

This image is generic, thus you can obviously re-use it within your non- related EEA projects.


Base docker image

Source code


  1. Install Docker.
  2. Install Docker Compose.


Start Jenkins master:

$ docker run --name=jenkins \
             -p 8080:8080 \
             -p 50000:50000 \

Start Docker engine server:

$ docker run --name=docker110 \
             --privileged=true \

Start Jenkins slave:

$ docker run --name=worker \
             --link=docker110 \
             -e DOCKER_HOST=tcp://dind:2375 \

See base image eeacms/jenkins-slave for more options.

Supported environment variables

  • DOCKER_HOST Docker engine server address:port to be used to run Docker related jobs
  • JENKINS_USER jenkins user to be used to connect slaves to Jenkins master. Make sure that this user has the proper rights to connect slaves and run jenkins jobs.
  • JENKINS_PASS jenkins user password
  • JAVA_OPTS You might need to customize the JVM running Jenkins slave, typically to pass system properties or tweak heap memory settings. Use JAVA_OPTS environment variable for this purpose.
  • JENKINS_NAME Name of the slave
  • JENKINS_DESCRIPTION Description to be put on the slave
  • JENKINS_EXECUTORS Number of executors. Default is equal with the number of available CPUs
  • JENKINS_LABELS Whitespace-separated list of labels to be assigned for this slave. Multiple options are allowed.
  • JENKINS_RETRY Number of retries before giving up. Unlimited if not specified.
  • JENKINS_MODE The mode controlling how Jenkins allocates jobs to slaves. Can be either ‘normal’ (utilize this slave as much as possible) or ‘exclusive’ (leave this machine for tied jobs only). Default is normal.
  • JENKINS_MASTER The complete target Jenkins URL like ‘http://jenkins-server’. If this option is specified, auto-discovery will be skipped
  • JENKINS_TUNNEL Connect to the specified host and port, instead of connecting directly to Jenkins. Useful when connection to Hudson needs to be tunneled. Can be also HOST: or :PORT, in which case the missing portion will be auto-configured like the default behavior
  • JENKINS_TOOL_LOCATIONS Whitespace-separated list of tool locations to be defined on this slave. A tool location is specified as ‘toolName:location’
  • JENKINS_NO_RETRY_AFTER_CONNECTED Do not retry if a successful connection gets closed.
  • JENKINS_AUTO_DISCOVERY_ADDRESS Use this address for udp-based auto-discovery (default
  • JENKINS_DISABLE_SSL_VERIFICATION Disables SSL verification in the HttpClient.
  • JENKINS_OPTS You can provide multiple parameters via this environment like: -e JENKINS_OPTS="-labels docker -mode exclusive"
  • DOCKERHUB_USER dockerhub user to be used to push images to dockerhub. If missing, the .m2/settings.xml required for pushing images will not be created.
  • DOCKERHUB_PASS dockerhub user password

The Initial Owner of the Original Code is European Environment Agency (EEA). All Rights Reserved.

The Original Code is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.


European Environment Agency (EU)