k8s-hello

Simple springboot-hello application for runnning in k8s cluster

Building and running locally

Build and test application:

mvn clean package
java -jar target/hello-0.0.1.jar

Create docker image:

docker build -t hello:v1 .

Test docker image:

docker run -p 8080:8080 hello:v1

Uploading image to docker hub (optional)

Login to docker hub:

docker login

Tag image and push to docker hub:

docker tag hello:v1 martinmaher/hello:v1
docker push martinmaher/hello:v1

Deploying on cluster

Create a new namespace in kubernetes and switch to this namespace:

kubectl create -f kubernetes/hello-namespace.yml
kubectl config set-context $(kubectl config current-context) --namespace=hello

Deploy in cluster:

kubectl create -f kubernetes/hello-deployment.yml
kubectl get all --namespace=hello

Create a service:

kubectl create -f kubernetes/hello-service.yml
kubectl get service/hello -o jsonpath="{.spec.ports[*].nodePort}"

Testing the service (endpoint on AWS):

kubectl get service/hello -o jsonpath="http://{.status.loadBalancer.ingress[0].hostname}:{.spec.ports[*].port}"

Rolling out a new version on cluster

TODO

Cleanup cluster

Remove everything:

kubectl delete service hello
kubectl delete deployment hello
kubectl delete namespace hello