Develop

Dockerfile

@@ -0,0 +1,34 @@
+# setting the base image, will be creating the build image
+FROM maven:3.8.8-eclipse-temurin-17 AS builder
+
+# setting up the work directory
+WORKDIR /app
+
+# Copy the project files
+COPY pom.xml .
+
+# run the mvn dependencies 
+RUN mvn dependency:go-offline
+
+# copy all the data to work directory
+COPY . .
+
+# running mvn clean at build time 
+RUN mvn clean package -DskipTests
+
+# Use a lightweight JDK runtime for the final image 
+# using multiple from to build multi-stage image 
+FROM openjdk:17-jdk-slim
+
+# setting the new work directory
+WORKDIR /app
+
+# Copy the built JAR from the builder stage
+COPY --from=builder /app/target/*.jar app.jar
+
+# exposing port 8080 where java app will run 
+EXPOSE 8080
+
+# setting the entry point, to run the application when it comes live
+ENTRYPOINT ["java", "-jar", "app.jar"]
+

deployment.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: hello-world-deployment
+  labels:
+    app: java-application
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: java-application
+  template:
+    metadata:
+      labels:
+        app: java-application
+    spec:
+      containers:
+      - name: java-application
+        image: abhiramikannan/javaimage:latest
+        ports:
+        - containerPort: 8080

service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-service
+spec:
+  type: NodePort
+  selector:
+    app: java-application
+  ports:
+    - port: 8080
+      # By default and for convenience, the `targetPort` is set to
+      # the same value as the `port` field.
+      targetPort: 8080
+      # Optional field
+      # By default and for convenience, the Kubernetes control plane
+      # will allocate a port from a range (default: 30000-32767)
+      nodePort: 30007