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Jenkins Swarm Docker container

This container runs the jenkins-swarm client. It is available on on Docker Hub.

The idea for this container is to not actually perform the compilation but instead to run a new Docker container that the build occurs within. The container contains make, which makes it super easy to use the container without further modification of build dependencies.

Configuration

Volumes

The following volumes can be mapped.

Workspaces

The volume used by the Jenkins Swarm is exposed as a volume. Use --volume /tmp/jenkins:/opt/jenkins-workspace when
running a container.

Docker

Docker can be used by jobs that are run by the Swarm container, use --volume /var/lib/docker.sock:/var/lib/docker.sock. You can
also make use of docker-compose within the Swarm container.

Note: The containers will be run on the same host as the Swarm container. This means any volumes mapped will be to the host.
You can use $(PWD) if you use a Makefile which will give you the path to the projects absolute path on the host, see below example.

Environment variables

Environment variables can be set that are passed to the jenkins-client. See the
Jenkins Swarm documentation
for further details.

Required

JENKINS_MASTER_URL: The jenkins master url

Optional

JENKINS_SLAVE_USER: The username to connect to the master
JENKINS_SLAVE_PASSWORD: The password to connect to the master
JENKINS_SWARM_MODE: The swarm mode. Defaults to exclusive
JENKINS_SWARM_EXECUTORS: The number of executors. Defaults to 1
JENKINS_SWARM_LABELS: The labels to apply to the swarm instance.
JENKINS_SWARM_NAME: The name of the swarm instance.
JENKINS_SWARM_DESCRIPTION: The description of the swarm instance
GIT_USER_EMAIL: The git users email
GIT_USER_NAME: The git users name

Example

Makefile

.PHONY : build ci

default: ci

build:
        docker build -t my_company/my_project ./

# Use $(PWD) to get the absolute path of the `Makefile` on the Docker host, 
# which should be in your projects root. In this example /opt/output is a volume
# in the container where test results are output to, which are then accessible to
# collect as artifacts in Jenkins.
ci: build
        docker run --rm -i \
            --volume $(PWD)/tmp:/opt/output \
            my_company/my_project \
            bash /path_to_where_your_dockerfile_copies_files/script/ci.sh
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Owner
lukesmith
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