cepr0 / k8s-demo Goto Github PK

https://kubernetes.io/blog/2020/05/21/wsl-docker-kubernetes-on-the-windows-desktop/
https://spring.io/guides/gs/spring-boot-kubernetes/
https://spring.io/guides/gs/spring-boot-docker/
https://spring.io/guides/topicals/spring-boot-docker/
https://spring.io/blog/2020/06/18/what-s-new-in-spring-boot-2-3

1. Install KinD

# Download the latest version of KinD
curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.8.1/kind-linux-amd64
# Make the binary executable
chmod +x ./kind
# Move the binary to your executable path
sudo mv ./kind /usr/local/bin/

2. Create 3-node k8s-cluster

kind create cluster --name wslkindmultinodes --config k8s/kind-3nodes.yaml

3. Build the demo app

mvn package -Dmaven.test.skip=true

4. Build and push your docker image

   • Build the image with Dockerfile

   docker build -t <you docker-hub profile>/k8s-demo:dockerfile .    

   • Or build the image directly using buildpack

   mvn spring-boot:build-image -Dspring-boot.build-image.imageName=<you docker-hub profile>/k8s-demo:buildpack

   • Push the image

   docker push <you docker-hub profile>/k8s-demo:<dockerfile or buildpack>

5. Deploy your app to k8s cluster

   • Create deployment.yml

   kubectl create deployment k8s-demo --image=<you docker-hub profile>/k8s-demo:<dockerfile or buildpack> --dry-run -o=yaml > k8s/deployment.yaml &&
   echo --- >> k8s/deployment.yaml &&
   kubectl create service clusterip k8s-demo --tcp=8080:8080 --dry-run -o=yaml >> k8s/deployment.yaml    

   • Deploy

   kubectl apply -f k8s/deployment.yaml

   • Test deployment (wait for status = Running of pod/k8s-demo-*)

   kubectl get all

   • Port forward to your application

   kubectl port-forward svc/k8s-demo 8080:8080 

   • Test your app (in another terminal)

   curl localhost:8080/actuator/health

6. Remove the k8s-cluster

kind delete cluster --name $(kind get clusters)