jenkins-agent-image-mgmt

Jenkins Agent for Container and Image Management

Jenkins Agent that enables various container and image management capabilities and is optimized for deployment to a Jenkins instance running in the OpenShift Container Platform.

Primary Components

Skopeo - A command utility for various operations on container images and image repositories.

NOTE: Skopeo is built with DISABLE_CGO=1 and thus lack support for devicemapper, btrfs and gpgme. See skopeo documentation for more information.

Build local

docker build -t jenkins-agent-image-mgmt .

Run local

For local running and experimentation run docker run -it --entrypoint=bash jenkins-agent-image-mgmt and have a play once inside the container.

Build in OpenShift

oc process -f ../../.openshift/templates/jenkins-agent-generic-template.yml \
  -p NAME=jenkins-agent-image-mgmt \
  -p SOURCE_CONTEXT_DIR=jenkins-agents/jenkins-agent-image-mgmt \
  | oc create -f -

For all params see the list in the ../../.openshift/templates/jenkins-agent-generic-template.yml or run oc process --parameters -f ../../.openshift/templates/jenkins-agent-generic-template.yml.

Jenkins

Add a new Kubernetes Container template called jenkins-agent-image-mgmt (if you've build and pushed the container image locally) and specify this as the node when running builds. If you're using the template attached; the role: jenkins-agent is attached and Jenkins should automatically discover the agent for you. Further instructions can be found here.

$ oc run jenkins-agent-image-mgmt -i -t --image=docker-registry.default.svc:5000/jenkins-agent-image-mgmt/jenkins-agent-image-mgmt --command -- skopeo --version
If you don't see a command prompt, try pressing enter.
skopeo version 1.0.0
Session ended, resume using 'oc attach jenkins-agent-image-mgmt-1-wcbxv -c jenkins-agent-image-mgmt -i -t' command when the pod is running

Use within Jenkins Pipeline Script

The following provides an example of how to make use of the image within a Jenkins pipeline script to execute the inspect function of the skopeo command line tool:

node('jenkins-agent-image-mgmt') { 

  stage('Inspect Image') {
    sh """

    set +x
        
    skopeo inspect docker://docker.io/fedora

    """
  }
}