Simple Jenkins configuration with dynamic slaves based on Docker containers. This repository contains all required files to setup simple Jenkins master and slaves for Node.js simple workloads. In jenkins-master directory you can find small plugins list and some groovy scripts for master pre-configuration. There is also a definition of job that will be used to seed further Jenkins jobs. Under jenkins-slave-nodejs, there is simple Dockerfile describing Jenkins slave for running Node.js jobs.

First, I would suggest forking this repository, as you likely modify the seedjob.groovy file to describe there your pipelines. After forking this repository, please set the seedjobRepository variable in the file jenkins-master/seedjobDefinition.groovy to point to the fork. Of course, don't forget to push changes to your fork.

Build a docker image from Dockerfile present in jenkins-master subdirectory. Provided Dockerfile sets up default plugins and several groovy init scripts.

$ docker build -f jenkins-master\Dockerfile -t jenkins-master jenkins-master

Run Jenkins master node. Mount /var/jenkins_home to a volume and share docker service from the host with the container.

$ docker run -d -p 8080:8080 -p 50000:50000 -v jenkins_master:/var/jenkins_home -v /var/run/docker.sock:/var/run/docker.sock --name jenkins-master jenkins-master

Issuing the command to run your Jenkins master, it will take some time the container to spin up. You can watch the progress following the log output by executing the command docker logs -f jenkins-master. You will find there the one-time password required during the first login into your Jenkins master. After a successful startup, you should be able to access the Jenkins master via your web browser hitting your docker host address and port 8080.

Build jenkins-slave-nodejs image. In the following example, you must specify Node.js major version as a build argument (NODE_VERSION).

$ docker build -f jenkins-slave-nodejs\Dockerfile --build-arg NODE_VERSION=8 -t jenkins-salve-nodejs:8 jenkins-slave-nodejs

Optionally, if you don't have access to any docker host, you can create a docker host machine using docker-machine and VirtualBox.

$ docker-machine create -d virtualbox --virtualbox-cpu-count "4" --virtualbox-disk-size "50000" --virtualbox-memory "8192" jenkins