This is a POC to demonstrate how we can package and deploy a spring boot 2 based application to k8s.
The project consiste of the following :
- Simple Spring boot 2 application, that expose a greeting endpoint.
- Dockerfile manifest to build the image
- deployment.yml manifest file for k8s resources definition (POD, SERVICE, PodDisruptionBudget)
For further reference, please consider the following sections:
- Build the demo spring boot application - docker image
mvn clean install
docker build -t demo:0.1.0 . - Push the built docker image to your own docker repository
docker images
docker login
docker push (your_repo_name)/demo-k8s:0.3.0 - Install minikube in your computer using these instructions - https://kubernetes.io/docs/tasks/tools/install-minikube/
- Start the minikube in your local machine
minikube start
- Create the deployment in kubernetes - it helps to pull the spring boot demo app docker images and deploy in K8S.
kubectl create -f deployment.yml # your application will be deployed in kubernetes
- View the container status
kubectl get pods
- To get the external Ip for accessing your application, please run
kubectl get svc minikube tunnel
- Access your deployed spring boot application in kubernetes
curl (external-ip)/hello
- To view the kubernetes setup
minikube dashboard