docker-jenkins-slave

Docker Jenkins slave image using swarm plugin and supports Docker in Docker

OS Base : jpetazzo/dind
Jenkins Swarm version :  1.15
Exposed Ports : 2812 22
Jenkins Home : /jenkins
Timezone : Europe/London

Environment Variables

JENKINS_JAVA_ARGS
    Arguments to pass to Java when Jenkins starts. Default : '-Djava.awt.headless=true'
JENKINS_SSH_PUBKEY
    SSH Public key that is added to Jenkins user authorized_keys file
JENKINS_PASSWD
    By default, the Jenkins SSH account password is randomally generated,
    however you can set this environment variable to set it yourself.
TZ
    Container Timezone. Default 'Europe/London'

Services

• Jenkins Slave
• Docker in Docker
• Monit
• SSHD

Monit is used to control the start up and management of Jenkins slave (and SSHD). You can access the monit webserver by exposing port 2812 on the Docker host. The user name is monit and password can be found by running:

docker logs <CONTAINER_ID> 2>/dev/null | grep MONIT_PASSWORD

OpenSSH is also running, you can ssh to the container by exposing port 22 on your Docker host and using the username jenkins. Password can be found by running:

docker logs <CONTAINER_ID> 2>/dev/null | grep JENKINS_PASSWORD

Swarm Client Startup Options

Below is a list of environment variables that are mapped to the the swarm client options. Simply pass them to the container when you run.

JENKINS_MASTER_URL      : -master
JENKINS_AUTODISC_ADDR   : -autoDiscoveryAddress
JENKINS_EXECUTORS       : -executors
JENKINS_LABELS          : -labels
JENKINS_USERNAME        : -username
JENKINS_PASSWORD        : -password

The autodiscovery will work if the slave is on the same network as the Jenkins master. The default configuration of Docker will prevent it from working if slave and master are on different Docker hosts. In this case you will need to pass in the environment variable JENKINS_MASTER_URL