Running a stateful Jenkins #evaneos #poc

docker.sh

# Build a clean Jenkins
docker build -f stateless.Dockerfile -t example/jenkins-example:stateless .

# Run it
docker run -d \
	--privileged=true \
	--name jenkins \
	--volume /var/run/docker.sock:/var/run/docker.sock:ro \
	--publish 8080:8080 \
	example/jenkins-example:stateless

# Do whatever you have to do:
# - install plugins
# - create your user
#     - if you're using the default admin, be careful to change its password
# - add your build pipeline definition (example in the Jenkinsfile)

# Copy your jenkins_home from the running container
docker cp jenkins:/var/jenkins_home .

# Remove the useless container
docker rm -f jenkins

# Build a stateful Jenkins with your jenkins_home
docker build -f stateful.Dockerfile -t example/jenkins-example:stateful .

# Run your stateful Jenkins instance
docker run -d \
	--privileged=true \
	--name jenkins \
	--volume /var/run/docker.sock:/var/run/docker.sock:ro \
	--publish 8080:8080 \
	example/jenkins-example:stateful

# IT'S ALIVE!!

Jenkinsfile

// Copy/paste it in the build pipeline you'll be creating

// Pipeline syntax: https://jenkins.io/doc/book/pipeline/syntax/
// Docker pipeline plugin docs: https://go.cloudbees.com/docs/cloudbees-documentation/cje-user-guide/index.html#docker-workflow

pipeline {
    agent { docker 'php:7.1-alpine' }

    stages {
        stage('Build PHP 7.1') { 
            steps {
                sh 'php -r \'echo "Hello World!";\''
            }
        }
    }
}

stateful.Dockerfile

FROM jenkins:alpine

USER root

RUN apk add --update git curl docker sudo

# cf. Jenkins docs : https://github.com/jenkinsci/docker#preinstalling-plugins
# cf. plugin docker: https://wiki.jenkins-ci.org/display/JENKINS/Docker+Plugin
RUN /usr/local/bin/install-plugins.sh docker-workflow docker-plugin

ENV JENKINS_HOME /var/toto
COPY ./jenkins_home /var/toto
RUN chown -R jenkins:jenkins /var/toto

stateless.Dockerfile

FROM jenkins:alpine

USER root

RUN apk add --update git curl docker sudo

# cf. Jenkins docs : https://github.com/jenkinsci/docker#preinstalling-plugins
# cf. plugin docker: https://wiki.jenkins-ci.org/display/JENKINS/Docker+Plugin
RUN /usr/local/bin/install-plugins.sh docker-workflow docker-plugin