Running Jenkins master and slaves in a Kubernetes cluster

Kubernetes examples running Jenkins master and slaves

Creating a cluster

Local with Docker Compose

A local testing cluster with one node can be created with Docker Compose

docker-compose up

When using boot2docker or Docker Engine with a remote host, the remote Kubernetes API can be exposed with docker-machine ssh MACHINE_NAME -- -L 0.0.0.0:8080:localhost:8080 or boot2docker ssh -L 0.0.0.0:8080:localhost:8080

More info

• Docker CookBook examples
• Kubernetes Getting started with Docker

Google Compute Engine

export KUBERNETES_HOME=~/kubernetes
export KUBERNETES_PROVIDER=gce
export KUBERNETES_NUM_MINIONS=2
export KUBE_GCE_ZONE=us-central1-a
$KUBERNETES_HOME/cluster/kube-up.sh

Creating the pods and services

kubectl get nodes
kubectl create --validate -f pod.yml
kubectl get pods
kubectl create --validate -f service-http.yml
kubectl create --validate -f service-slave.yml
kubectl get services
kubectl create --validate -f replication.yml
kubectl get pods
kubectl scale replicationcontrollers --replicas=2 jenkins-slave

# if running in GCE, create the forwarding rule
gcloud compute forwarding-rules list
gcloud compute forwarding-rules describe --region us-central1 kubernetes-default-jenkins
gcloud compute firewall-rules create --validate jenkins-node-master --allow=tcp:8888 --target-tags kubernetes-minion

Rolling update

kubectl rolling-update jenkins-slave --update-period=10s -f replication-v2.yml

Tearing down

kubectl stop jenkins-slave
kubectl delete replicationcontrollers jenkins-slave
kubectl delete pods jenkins
kubectl delete services jenkins
kubectl delete services jenkins-slave
$KUBERNETES_HOME/cluster/kube-down.sh
gcloud compute firewall-rules delete jenkins-node-master

Demo

Kubernetes cluster up

Jenkins master and slaves provisioning

Kubernetes cluster teardown