Deploy SpringBoot application to Kubernetes pod with Jenkins and Docker

Hi, in this tutorial I will teach you how to deploy a springboot application to a kubernetes pod in 10 minutes guaranteed.

Repo link to be added.

First get a spring boot project.

Then install minikube, docker desktop, and jenkins.

Then open up Jenkins, create a Multibranch pipeline and link your GitHub repository. (Single branch)

Add a Jenkinsfile to your repo. (Replace sarthak-demo-api with your project name)

node{
  //Checkout Code from Git
  checkout scm

  //Stage 1 : Build the docker image.
  stage('Build image') {
      sh("./mvnw spring-boot:build-image")
  }

  //Stage 2 : Push the image to docker registry
  stage('Push image to registry') {
      sh('docker tag sarthak-demo:0.0.1-SNAPSHOT sagraw47/sarthak-demo-api')
      sh("docker push sagraw47/sarthak-demo-api")
  }

  //Stage 3 : Deploy Application
  stage('Deploy Application') {
      sh("kubectl apply -f deployment.yaml")
      sh("kubectl rollout restart deployment sarthak-demo-api")
  }
}

Add a deployment.yaml file to your repo. (Replace sarthak-demo-api with your project name)

apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: sarthak-demo-api
  name: sarthak-demo-api
spec:
  replicas: 1
  selector:
    matchLabels:
      app: sarthak-demo-api
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: sarthak-demo-api
    spec:
      containers:
        - image: sagraw47/sarthak-demo-api
          name: sarthak-demo-api
          imagePullPolicy: Always
          resources: {}
status: {}
---
apiVersion: v1
kind: Service
metadata:
  creationTimestamp: null
  labels:
    app: sarthak-demo-api
  name: sarthak-demo-api
spec:
  ports:
    - name: 3001-3001
      port: 3001
      protocol: TCP
      targetPort: 3001
  selector:
    app: sarthak-demo-api
  type: NodePort
status:
  loadBalancer: {}

Run your jenkins job!