Jenkins Docker Plugin

External

• https://wiki.jenkins.io/display/JENKINS/Docker+Plugin
• https://wiki.jenkins.io/display/JENKINS/Docker+Commons+Plugin
• https://plugins.jenkins.io/docker-plugin

Internal

• Jenkins Concepts

Overview

ID: docker-commons

ID: docker-plugin

Concepts

Docker Agent

Jenkins can interact with agents executing as containers within a Docker instance. The agent containers must be based on one of the following base images:

jenkins/ssh-slave

https://hub.docker.com/r/jenkins/ssh-slave/

The image comes with sshd and a JDK. The Jenkins master will use ssh to connect into the agent's sshd. A SSH key based on unique Jenkins master instance identity can be injected in container on startup, obviating the need for password.

jenkins/jnlp-slave

https://hub.docker.com/r/jenkins/jnlp-slave/

The image comes with JDK. Jenkins master URL has to be reachable from the agent's container. The container will be configured automatically with the agent's name and secret. No special configuration of the container is needed.

jenkins/slave

https://hub.docker.com/r/jenkins/slave/

An "attached" agent.

Installation

Plugin Installation

Manually from the UI or:

/usr/local/bin/install-plugins.sh docker-plugin

Jenkins Server Configuration

Jenkins -> Manage Jenkins -> Configure System -> Cloud -> Add a new cloud -> Docker

Name: docker

Docker Host URI it is the URI to the Docker Host. May be left blank to use the default value defined by DOCKER_HOST environment variable. A typical value is unix:///var/run/docker.sock or tcp://127.0.0.1:2376. Note that if Jenkins itself runs as a Docker container on the same docker server, TODO

Note that the UI has a "Test Connection".

Docker Agent Template: associates a label with a Docker image, which must be available on an accessible registry.

Configuration

The agent images need to be created and accessible to the Jenkins server.