├── Dockerfile
├── README.md
├── app.yaml
├── deployment.yaml
├── pom.xml
├── service.yaml
└── src
    ├── main
        ├── java
        │   └── com
        │   │   └── javatechie
        │   │       └── k8s
        │   │           └── SpringbootK8sDemoApplication.java
        └── resources
        │   └── application.properties
    └── test
        └── java
            └── com
                └── javatechie
                    └── k8s
                        └── SpringbootK8sDemoApplicationTests.java


/Dockerfile:
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1 | FROM openjdk:17
2 | EXPOSE 8080
3 | ADD target/springboot-k8s-demo.jar springboot-k8s-demo.jar
4 | ENTRYPOINT ["java","-jar","/springboot-k8s-demo.jar"]


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/README.md:
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1 | # springboot-k8s-example
2 | Deploy your spring boot application to kubernetes cluster 
3 | 


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/app.yaml:
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 1 | apiVersion: argoproj.io/v1alpha1
 2 | kind: Application
 3 | metadata:
 4 |   name: myapp-argo-application
 5 |   namespace: argocd
 6 | spec:
 7 |   project: default
 8 | 
 9 |   source:
10 |     repoURL: https://github.com/Java-Techie-jt/springboot-k8s-example.git
11 |     targetRevision: HEAD
12 |   destination:
13 |     server: https://kubernetes.default.svc
14 |     namespace: spring-boot-k8s
15 | 
16 |   syncPolicy:
17 |     syncOptions:
18 |       - CreateNamespace=true
19 | 
20 |     automated:
21 |       selfHeal: true
22 |       prune: true


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/deployment.yaml:
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 1 | apiVersion: apps/v1
 2 | kind: Deployment # Kubernetes resource kind we are creating
 3 | metadata:
 4 |   name: spring-boot-k8s
 5 | spec:
 6 |   selector:
 7 |     matchLabels:
 8 |       app: spring-boot-k8s
 9 |   replicas: 2 # Number of replicas that will be created for this deployment
10 |   template:
11 |     metadata:
12 |       labels:
13 |         app: spring-boot-k8s
14 |     spec:
15 |       containers:
16 |         - name: spring-boot-k8s
17 |           image: springboot-k8s-example:1.0
18 |           # Image that will be used to containers in the cluster
19 |           imagePullPolicy: IfNotPresent
20 |           ports:
21 |             - containerPort: 8080
22 | # The port that the container is running on in the cluster


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/pom.xml:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3 | 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 4 | 	<modelVersion>4.0.0</modelVersion>
 5 | 	<parent>
 6 | 		<groupId>org.springframework.boot</groupId>
 7 | 		<artifactId>spring-boot-starter-parent</artifactId>
 8 | 		<version>3.2.1</version>
 9 | 		<relativePath/> <!-- lookup parent from repository -->
10 | 	</parent>
11 | 	<groupId>com.javatechie</groupId>
12 | 	<artifactId>springboot-k8s-demo</artifactId>
13 | 	<version>0.0.1-SNAPSHOT</version>
14 | 	<name>springboot-k8s-demo</name>
15 | 	<description>Demo project for Spring Boot</description>
16 | 	<properties>
17 | 		<java.version>17</java.version>
18 | 	</properties>
19 | 	<dependencies>
20 | 		<dependency>
21 | 			<groupId>org.springframework.boot</groupId>
22 | 			<artifactId>spring-boot-starter-web</artifactId>
23 | 		</dependency>
24 | 
25 | 		<dependency>
26 | 			<groupId>org.springframework.boot</groupId>
27 | 			<artifactId>spring-boot-starter-test</artifactId>
28 | 			<scope>test</scope>
29 | 		</dependency>
30 | 	</dependencies>
31 | 
32 | 	<build>
33 | 		<plugins>
34 | 			<plugin>
35 | 				<groupId>org.springframework.boot</groupId>
36 | 				<artifactId>spring-boot-maven-plugin</artifactId>
37 | 			</plugin>
38 | 		</plugins>
39 | 		<finalName>springboot-k8s-demo</finalName>
40 | 	</build>
41 | 
42 | </project>
43 | 


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/service.yaml:
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 1 | apiVersion: v1 # Kubernetes API version
 2 | kind: Service # Kubernetes resource kind we are creating
 3 | metadata: # Metadata of the resource kind we are creating
 4 |   name: springboot-k8s-svc
 5 | spec:
 6 |   selector:
 7 |     app: spring-boot-k8s
 8 |   ports:
 9 |     - protocol: "TCP"
10 |       port: 8080 # The port that the service is running on in the cluster
11 |       targetPort: 8080 # The port exposed by the service
12 |   type: NodePort # type of the service.


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/src/main/java/com/javatechie/k8s/SpringbootK8sDemoApplication.java:
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 1 | package com.javatechie.k8s;
 2 | 
 3 | import org.springframework.boot.SpringApplication;
 4 | import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 | import org.springframework.web.bind.annotation.GetMapping;
 6 | import org.springframework.web.bind.annotation.RestController;
 7 | 
 8 | @SpringBootApplication
 9 | @RestController
10 | public class SpringbootK8sDemoApplication {
11 | 
12 | 	@GetMapping("/message")
13 | 	public String welcome(){
14 | 		return "Congratulation you successfully deployed your application to kubernetes !!";
15 | 	}
16 | 
17 | 	public static void main(String[] args) {
18 | 		SpringApplication.run(SpringbootK8sDemoApplication.class, args);
19 | 	}
20 | 
21 | }
22 | 


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/src/main/resources/application.properties:
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1 | 
2 | 


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/src/test/java/com/javatechie/k8s/SpringbootK8sDemoApplicationTests.java:
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 1 | package com.javatechie.k8s;
 2 | 
 3 | import org.junit.jupiter.api.Test;
 4 | import org.springframework.boot.test.context.SpringBootTest;
 5 | 
 6 | @SpringBootTest
 7 | class SpringbootK8sDemoApplicationTests {
 8 | 
 9 | 	@Test
10 | 	void contextLoads() {
11 | 	}
12 | 
13 | }
14 | 


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