Jenkins CI with disposable containers

This is a Jenkins CI Server image suitable for running CD work-flows inside disposable containers using Jenkins Docker Pipeline and the Docker daemon present on the host system. Note that this is not a "Docker in Docker" Jenkins setup. This image requires the Docker socket to be mounted inside the Jenkins container. All the Docker commands issued by the Jenkins Docker Pipeline will be executed on the host system. This image also has Ansible installed to facilitate container orchestration over SSH.

This image is based on the official Jenkins image. Each time the official image is updated, Docker Hub will automatically trigger a rebuild of this image.

Running Jenkins

First, you will need to set up persistent storage for Jenkins and the Ansible inventory.

You will need a directory for each on the host, and you will need to give the jenkins user (UID 1000) ownership of both.

For Jenkins:

JENKINS_HOME=/home/$(whoami)/jenkins_home
mkdir $JENKINS_HOME
chown -R 1000 $JENKINS_HOME

For Ansible:

ANSIBLE_INVENTORY=/home/$(whoami)/ansible
mkdir $ANSIBLE_INVENTORY
chown -R 1000 $ANSIBLE_INVENTORY

Run Jenkins container by mounting the Docker socket, jenkins_home and ansible directory:

docker run -d --name jenkins \ 
	-p 8080:8080 -p 50000:50000 \ 
	-v /var/run/docker.sock:/var/run/docker.sock \ 
	-v /home/$(whoami)/jenkins_home:/var/jenkins_home \ 
	-v /home/$(whoami)/ansible:/etc/ansible \ 
	stefanprodan/jenkins

After starting the container, you can access Jenkins at http://localhost:8080. Look in the logs for the admin password that Jenkins is generating on first run:

docker logs jenkins

or run

docker exec -it jenkins cat /var/jenkins_home/secrets/initialAdminPassword

After login, chose Select plugins to install and uncheck all.

Jenkins plugins

Pre-installed plugins:

• Ant
• Ansible
• Build Timeout
• GitHub
• Gradle
• Pipeline
• Purge Job History
• CloudBees Docker Pipeline
• Credentials Binding
• Simple Theme Plugin
• SSH Agent
• SSH Slaves
• Timestamper
• Workspace Cleanup
• Xunit