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The purpose is to locally spin up a pre-configured Jenkins instance that uses Jenkins Kubernetes Plugin to dynamically create containers on specific namespaces for CI builds.
- Dockerfile is used to handle the installation of all the required Plugins.
- Instructions below are for building on Kontainer8 Worker node
vagrant ssh worker
git clone https://github.com/theJaxon/jenkins-config-as-code.git
cd jenkins-config-as-code
# Create new image with plugins specified in Dockerfile pre-installed
podman build --tag jenkins-local .
# Save the image into tar file
podman save jenkins-local -o jenkins-local.tar
# Use ctr to import the image
sudo ctr -n=k8s.io images import jenkins-local.tar
# Apply resources inside Deployment directory via Kustomize
kustomize build Manifests | kubectl apply -f -
# Login username and password are admin- The current cluster setup is the same as
Kontainter8 project setup - To give Jenkins access to Spin up pods in any namespace there's a service account created, this SA gets tied to the cluster role
cluster-admin - All this is handled via
kustomization.yaml - Kustomize generates a configMap from
JCasC.yamlfile then the file gets mounted at/var/jenkins_home/casc_configs/JCasC.yaml - Configuration as code file is loaded via the environment variable
CASC_JENKINS_CONFIG - Persistent Volume is created Via local-path provisioner with is the default storage class for Kontainer8
- The connection between dynamic pods and jenkins is handled via
jnlp-slave - For this a Pod template is created where the container name is jnlp, when the name changed it caused errors so it's kept as jnlp and the Pod template name is also jnlp
- The template is pre-configured via jcasc
podTemplate(containers: [
containerTemplate(name: 'buildah', image: 'quay.io/buildah/stable', command: 'sleep', args: '99d', privileged: true),
containerTemplate(name: 'maven', image: 'maven:3.8.6-jdk-11', command: 'sleep', args: '99d')]
) {
node(POD_LABEL) {
stage('Compile') {
container('maven') {
git url: 'https://github.com/quarkusio/quarkus-quickstarts.git', branch: 'main'
dir("getting-started"){
sh "mvn package"
}
}
}
stage('Image Build'){
container('buildah'){
// https://github.com/quarkusio/quarkus-quickstarts/tree/main/getting-started
dir("getting-started"){
sh"""
container=\$(buildah from --name "quarkus-container" docker.io/amazoncorretto:11)
buildah copy \$container target/quarkus-app/lib/ /deployments/lib/
buildah copy \$container target/quarkus-app/*.jar /deployments/
buildah copy \$container target/quarkus-app/app/ /deployments/app/
buildah copy \$container target/quarkus-app/quarkus/ /deployments/quarkus/
buildah config --entrypoint "java -jar /deployments/quarkus-run.jar -Dquarkus.http.host=0.0.0.0" \$container
buildah commit \$container 723178642448.dkr.ecr.us-east-1.amazonaws.com/quarkus:latest
buildah images
buildah login -u AWS -p ${LOGIN_TOKEN} 723178642448.dkr.ecr.us-east-1.amazonaws.com
buildah push 723178642448.dkr.ecr.us-east-1.amazonaws.com/quarkus:latest
"""
}
}
}
}
}