k8s-demo

Build

mvn clean package
docker build -t alessiofiore/k8s-demo:1.0.0 .
docker create -p 9080:8080 --name k8s-demo alessiofiore/k8s-demo:1.0.0
docker push alessiofiore/k8s-demo:1.0.0

K8s

Enable Ingress

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.35.0/deploy/static/provider/cloud/deploy.yaml

Components management

Create

kubectl create secret generic mysecret --from-literal mySecretName=Pippo
kubectl apply -f k8s/configmap.yaml
kubectl apply -f k8s/deployment.yaml
kubectl apply -f k8s/service.yaml
kubectl apply -f k8s/ingress.yaml

Delete

kubectl delete -n default secret mysecret
kubectl delete -n default configmap k8s-demo-configmap
kubectl delete -n default deployment k8s-demo-deployment
kubectl delete -n default service k8s-demo-service
kubectl delete -n default ingress ingress-service

Test

Container

GET http://localhost:9080/hello -> Hi from Spring

K8s

GET http://localhost/k8s-demo/hello -> Hello from K8S

# Edit configmap changing "K8S" value
kubectl edit configmap k8s-demo-custom-configmap

GET http://localhost/k8s-demo/hello -> Hello from {updated value}

Utils

kubectl describe ing ingress-service