SpringBoot-K8s

Deploy application to kubernetes cluster using command line

• mvn clean package
• Install Minikube
• Install Kubectl
• Install DockerDesktop

Commands :

• minikube start
• minikube status
• kubectl cluster-info

To read docker repository use this

minikube docker-env

Copy the output of above command run again,it will be like this

@FOR /f "tokens=*" %i IN ('minikube -p minikube docker-env --shell cmd') DO @%i

Make docker image of the application

docker build -t app-k8s:1.0 .

To see docker image which you built above

docker images

Create deployment using command prompt

kubectl create deployment app-k8s --image=app-k8s:1.0 --port=8080

Check deployment which you created and ready state

kubectl get deployment 

More info regarding deployment

kubectl describe deployment app-k8s

Pod logs :

kubectl get pods 

Copy the pod name from above and replace in the below command and see pod is running

kubectl logs {pod-name}

Create service so that host can call service url and service will call pod

kubectl expose deployment app-k8s1 --type=NodePort
- output -> service/app-k8s1 exposed

Get proxy url to call service url from the browser

minikube service app-k8s1 --url
  
copy the output url and paste in the browser and hit spring boot application endpoint like below

http://127.0.0.1:62465/hello

Check health

minikube dashboard
  
copy the url and see in the dashboard pods , replica set , jobs etc  to see the health and delete pod etc.

Delete Service and deployment to clean up space

- delete service 
    kubectl service delete app-k8s

- delete deployment 
    kubectl delete deployment app-k8s