kubernetes-spring-boot-app-deployment

Example SpringBoot app tutorial to deploy to Kubernetes cluster using kind.

Tutorial to build & run java app locally ---> containerize the image and push to JFrog Artifactory --> create identity key on JFrog --> Install and start kind cluster ---> create a namespace --> create artifactory secret in kubernetes --> create a deployment ---> check pods

pre-reqs

• java 18.0
• maven
• docker
• kind
• jfrog artifactory account
• kubectl

steps

1. clone Repo

2. cd into the directory

3. build SpringBoot maven app using following command

     ./mvnw clean package
   

4. run the app locally to test if its working

     ./mvnw SpringBoot:run
   

5. create a Docker image of the app locally using the Dockerfile

     docker build -t spring-boot-app:latest .
   

6. check if image was created

     docker images     
   

7. run the image locally and test if it works

     docker run --publish 8080:8080 spring-boot-app
   

8. tag the image

     docker build -t swagger-java-app:latest .
   

9. push the image to your private artifactory

     docker push <YOUR_HOST>.jfrog.io/default-docker-local/spring-boot-app:latest
   

10. run the kind cluster locally

     kind create cluster
    

11. create a namespace

     kubectl apply -f resources/namespace.yaml
    

12. create a secret of artifactory

     kubectl create secret docker-registry regcred --docker-server=<YOUR_HOST>.jfrog.io --docker-username=<USER_NAME> --docker-password=<IDENTITY_TOKEN> --docker-email=<EMAIL_ADDRESS>
    

13. patch default service account

     kubectl patch serviceaccount default -p '{"imagePullSecrets": [{"name": "regcred"}]}'
    

14. create deployment

     kubectl apply -f resources/deployment.yaml
    

15. check status

     kubectl get deployments 
     kubectl get pods