Building a latest Jenkins with master/slave on Docker

README.md

Build Master/Slave

Generate SSH keys

docker-compose up --build -d
docker-compose exec master ssh-keygen -t rsa -b 4096 -C ""

Set a public key

Check a public key and edit JENKINS_SLAVE_SSH_PUBKEY in docker-compose.yml.

cat jenkins_home/.ssh/id_rsa.pub
vi docker-compose.yml
...
    environment:
      - JENKINS_SLAVE_SSH_PUBKEY=ssh-rsa AAAAB3NzaC...
...

Set a private key

Check a private key and set it in Jenkins GUI.

cat jenkins_home/.ssh/id_rsa

Note

Alpine image sometimes make problems like NodeJS Plugin. I recommend to use Ubuntu image of default.

docker-compose.masterslave.yml

version: "3"

services:
  master:
    build: .
    ports:
      - 8080:8080
      - 50000:50000
    volumes:
      - ./jenkins_home:/var/jenkins_home
    links:
      - slave01

  slave01:
    image: jenkinsci/ssh-slave
    environment:
      - JENKINS_SLAVE_SSH_PUBKEY=ssh-rsa AAAAB3NzaC...

docker-compose.yml

version: "3"

services:
  master:
    build: .
    ports:
      - 8080:8080
    volumes:
      - ./jenkins_home:/var/jenkins_home

Dockerfile

FROM jenkins

USER root
RUN cd tmp/ \
    && wget https://updates.jenkins-ci.org/latest/jenkins.war \
    && mv ./jenkins.war /usr/share/jenkins/

USER jenkins

Dockerfile.alpine

FROM jenkins:alpine

USER root
RUN apk --no-cache add openssl
RUN cd tmp/ \
    && wget https://updates.jenkins-ci.org/latest/jenkins.war \
    && mv ./jenkins.war /usr/share/jenkins/

USER jenkins