feat: HTTP 서버로 전환 + Kaniko 이미지 빌드/K8s 배포 파이프라인 추가

Dockerfile

@@ -0,0 +1,4 @@
+FROM eclipse-temurin:21-jre
+WORKDIR /app
+COPY build/libs/*.jar app.jar
+ENTRYPOINT ["java", "-jar", "/app/app.jar"]

Jenkinsfile

@@ -5,19 +5,66 @@ pipeline {
 apiVersion: v1
 kind: Pod
 spec:
+  serviceAccountName: jenkins-deployer
   containers:
   - name: gradle
     image: eclipse-temurin:21-jdk
     command: ["sleep"]
     args: ["99d"]
+  - name: kaniko
+    image: gcr.io/kaniko-project/executor:debug
+    command: ["sleep"]
+    args: ["99d"]
+    volumeMounts:
+    - name: docker-config
+      mountPath: /kaniko/.docker
+  - name: kubectl
+    image: bitnami/kubectl:1.31
+    command: ["sleep"]
+    args: ["99d"]
+  volumes:
+  - name: docker-config
+    secret:
+      secretName: gitea-registry-cred
+      items:
+      - key: .dockerconfigjson
+        path: config.json
 '''
         }
     }
+    environment {
+        IMAGE = "gitea.led.ectech.co.kr/ledmega/cstest:${env.BUILD_NUMBER}"
+    }
     stages {
         stage('Build') {
             steps {
                 container('gradle') {
-                    sh 'chmod +x gradlew && ./gradlew build --console=plain'
+                    sh 'chmod +x gradlew && ./gradlew build --console=plain -x test'
+                }
+            }
+        }
+        stage('Image') {
+            steps {
+                container('kaniko') {
+                    sh '''
+                        /kaniko/executor \
+                          --context `pwd` \
+                          --dockerfile Dockerfile \
+                          --destination ${IMAGE}
+                    '''
+                }
+            }
+        }
+        stage('Deploy') {
+            steps {
+                container('kubectl') {
+                    sh '''
+                        sed "s#IMAGE_PLACEHOLDER#${IMAGE}#" k8s/deployment.yaml > /tmp/deployment.yaml
+                        kubectl apply -f /tmp/deployment.yaml
+                        kubectl apply -f k8s/service.yaml
+                        kubectl apply -f k8s/ingress.yaml
+                        kubectl -n apps rollout status deployment/cstest --timeout=90s
+                    '''
                 }
             }
         }

k8s/deployment.yaml

@@ -0,0 +1,39 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: cstest
+  namespace: apps
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: cstest
+  template:
+    metadata:
+      labels:
+        app: cstest
+    spec:
+      containers:
+      - name: cstest
+        image: IMAGE_PLACEHOLDER
+        ports:
+        - containerPort: 8080
+        readinessProbe:
+          httpGet:
+            path: /healthz
+            port: 8080
+          initialDelaySeconds: 3
+          periodSeconds: 5
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 8080
+          initialDelaySeconds: 5
+          periodSeconds: 10
+        resources:
+          requests:
+            cpu: "50m"
+            memory: "128Mi"
+          limits:
+            cpu: "250m"
+            memory: "256Mi"

k8s/ingress.yaml

@@ -0,0 +1,18 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: cstest
+  namespace: apps
+spec:
+  ingressClassName: traefik
+  rules:
+  - host: cstest.led.ectech.co.kr
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: cstest
+            port:
+              number: 8080

k8s/service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: cstest
+  namespace: apps
+spec:
+  selector:
+    app: cstest
+  ports:
+  - port: 8080
+    targetPort: 8080

src/main/java/com/cstest/App.java

@@ -1,12 +1,37 @@
 package com.cstest;
 
+import com.sun.net.httpserver.HttpServer;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
+
 public class App {
 
     public String greeting() {
-        return "Hello for real this time from cstest — Gitea/Jenkins CI/CD 연동 테스트용 프로그램";
+        return "Hello for real this time from cstest — Gitea/Jenkins/K8s CI/CD 연동 테스트용 프로그램";
     }
 
-    public static void main(String[] args) {
-        System.out.println(new App().greeting());
+    public static void main(String[] args) throws IOException {
+        App app = new App();
+        int port = 8080;
+        HttpServer server = HttpServer.create(new InetSocketAddress(port), 0);
+        server.createContext("/", exchange -> {
+            byte[] body = app.greeting().getBytes(StandardCharsets.UTF_8);
+            exchange.getResponseHeaders().add("Content-Type", "text/plain; charset=utf-8");
+            exchange.sendResponseHeaders(200, body.length);
+            try (OutputStream os = exchange.getResponseBody()) {
+                os.write(body);
+            }
+        });
+        server.createContext("/healthz", exchange -> {
+            byte[] body = "OK".getBytes(StandardCharsets.UTF_8);
+            exchange.sendResponseHeaders(200, body.length);
+            try (OutputStream os = exchange.getResponseBody()) {
+                os.write(body);
+            }
+        });
+        server.start();
+        System.out.println("cstest listening on :" + port);
     }
 }