spring-boot-k8s

Spring boot deploy k8s example

Prerequisites

• Java 17
• Docker / Docker-compose
• Minikube

Get Started

• Init sample application
• Deploy sample application k8s
• CRUD app sample
• Deploy Postgres k8s

1. Install minikube

Install minikube

brew install minikube

Show minikube dashboard

minikube dashboard

2. Build app docker image

Build docker image

./mvnw spring-boot:build-image

Tag docker image

docker tag demo:0.0.1-SNAPSHOT uuhnaut69/spring-demo

Push image

docker push uuhnaut69/spring-demo

3. Generate k8s yaml files

Make directory to store all yaml files

mkdir deployment

Generate deployment yaml

kubectl create deployment spring-boot-app --image uuhnaut69/spring-demo -o yaml --dry-run=client > deployment/app-deployment.yaml

Generate service yaml

kubectl create service clusterip spring-boot-app --tcp 80:8080 -o yaml --dry-run=client > deployment/app-service.yaml

4. Deploy

Apply deployment

kubectl apply -f ./deployment

Config port forward

kubectl port-forward svc/spring-boot-k8s 9090:80

Test

curl http://localhost:9090/greeter; echo