This is useful for spinning up a jenkins agent easily without having to install required software on a bare bones host.
The the docker-compose.yml file for example usage.
This will use the jenkins swarm plugin to connect to a jenkins server.
Docker image is built on Debian and has support for the following architectures:
- amd64
- arm64
- armv7
To install any other required packages create your own Dockerfile:
FROM jc21/jenkins-node
RUN apt-get install -y install nameofmypackage
Since this approach is using docker outside of docker, via a socket, the paths of the jenkins workspace outside of the container must match inside the container too.
eg: defining /var/lib/docker as the jenkins working folder inside
this container means that it will start docker containers on the host
with mounts inside the same path /var/lib/docker
version: "3"
services:
jenkins-node:
image: jc21/jenkins-node:latest
restart: unless-stopped
environment:
- PUID=1000
- PGID=1000
- JENKINS_DATA=/var/lib/jenkins-node
# Space delimiters labels for this node. This will be automatically appended on start
- LABELS=docker rpmbuild
# Jenkins Host to connect to
- MASTER=https://ci.jc21.com
# Mode for this node: normal|exclusive. Default: normal
- MODE=normal
# Number of executors
- EXECUTORS=2
# Name of this jenkins node, default is the docker container hostname
- NAME=taurus
# Description of this node, defaults to something not very useful
- DESCRIPTION=Linux 5.13.11-1.el8.elrepo.x86_64 x86_64
# The Jenkins username for authentication.
- USERNAME=swarmmaster
# The Jenkins user API token or password
- PASSWORD=somethingsecret
volumes:
# This is required for docker control
- '/var/run/docker.sock:/var/run/docker.sock'
# This mount should be the same inside and out
# and should be the same as JENKINS_DATA above
- '/var/lib/jenkins-node:/var/lib/jenkins-node'