pawel-szafran/kubernetes-hands-on

Materials for my Hands on Kubernetes session

Hands on Kubernetes

Materials for my Hands on Kubernetes session at UBS Coding Harbor meetup.

What to bring?

To make the session run smoothly, please bring a laptop with:

• working Internet connection
• Git
• Docker
  • and run pull-docker-images.sh to save on downloads during the session
• your favorite text editor
• (OPTIONAL) your favorite Docker-ready tech-stack for building services with some REST API

The plan

• Intro
  • Docker
  • Kubernetes (k8s)
• Run Kubernetes locally via Docker
• Pods
• Replication Controllers
• Labels
• Scaling
• Services
  • Service discovery
  • Load balancing
  • Virtual IPs and service proxies
• Releasing
  • Rolling updates
  • Canary releases

Cheat sheet

Install k8s:

cd k8s-on-docker
docker-compose up -d
./tunnel-apiserver.sh  # For Docker on VM
# Install kubernetes-cli (kubectl). For Mac:
brew install kubernetes-cli  # brewi if you use Prezto
./enable-dns.sh

Play with k8s:

kubectl get [node|pod|rc|svc]
kubectl describe type/name
docker build -t k8s-hands-on/products:v1 .
kubectl create -f def.yml
kubectl replace -f def.yml
kubectl delete type/name
docker exec -it httpie... bash  # Use kubectl exec on real cluster
kubectl scale rc/products --replicas=10
kubectl rolling-update products --image=k8s-hands-on/products:v2
kubectl rolling-update products --image=k8s-hands-on/products:v2 --update-period=1s
kubectl rolling-update products --image=k8s-hands-on/products:v2 --rollback
kubectl label pod -lsvc=products track=stable