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parameterized-cac-jenkins

This repo is an example of using Configuration-as-Code with Jenkins as well as the following:

  • Triggering downstream Jenkins job with parameters
  • Copying dynamic variables between jobs

Running locally on Docker

Configuration-as-Code is mounted onto the Docker container. Reloading the

Environment variables

Environment variables are kept in .env and used to populate an example. Any environment variable can be used in this way throughout the configuration.

docker build -t jenkins -f docker/Dockerfile .
docker run -d --rm --name jenkins -p 8080:8080 -p 50000:50000 --env-file .env -v "$(pwd)"/jac:/usr/share/jac jenkins

To cleanup:

docker stop jenkins

TODO: How to connect to a Kubernetes cluster from a Docker container

Running in Minikube

Environment variables

Environment variables are defined in secrets and then referred to in the deployment config.

Example: kubectl -n jenkins create secret generic test --from-literal=test=abcd1234

Stand up the service

minikube start
kubectl create ns jenkins
kubectl -n jenkins create secret generic test --from-literal=test=abcd1234
kubectl -n jenkins apply -f kubernetes/sa.yml
kubectl -n jenkins apply -f kubernetes/jenkins.yml
kubectl -n jenkins apply -f kubernetes/service.yml

Verify the status of Jenkins with:

kubectl get all -n jenkins
kubectl logs jenkins-0 -n jenkins

Get Jenkins endpoint

MINIKUBE_IP=$(minikube ip)
NODEPORT=$(kubectl -n jenkins get svc | tail -n 1 | awk -F ':' '{print $2}' | awk -F '/' '{print $1}')
JENKINS_URL="http://$MINIKUBE_IP:$NODEPORT"
echo "Go here for Jenkins: $JENKINS_URL"

Got to Jenkins and Run Job

Build this $JENKINS_URL/job/kubernetes-jobs/job/job1/

Running in EKS

Need to follow this guide to be ALB setup correctly: https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html

eksctl create cluster jenkins
eksctl create nodegroup --cluster jenkins
kubectl create ns jenkins
kubectl -n jenkins create secret generic test --from-literal=test=abcd1234
kubectl -n jenkins apply -f kubernetes/sa.yml
kubectl -n jenkins apply -f kubernetes/jenkins.yml
kubectl -n jenkins apply -f kubernetes/service.yml
kubectl -n jenkins apply -f kubernetes/ingress.yml

Verify the status of Jenkins with:

kubectl get all -n jenkins
kubectl logs jenkins-0 -n jenkins

Get Jenkins endpoint

Create ingress and point to that for Jenkins

kubectl get ingress/jenkins-ingress -n jenkins

Got to Jenkins and Run Job

Build this $JENKINS_URL/job/kubernetes-jobs/job/job1/