Update Jenkinsfile

.gitignore

@@ -1 +1,2 @@
 .idea/*
+target

Dockerfile

@@ -2,7 +2,7 @@ FROM openjdk:8-jre-alpine
 
 EXPOSE 8080
 
-COPY ./target/java-maven-app-*.jar /usr/app/
+COPY ./target/java-maven-app-1.0-SNAPSHOT.jar /usr/app/
 WORKDIR /usr/app
 
-CMD java -jar java-maven-app-*.jar
+ENTRYPOINT ["java", "-jar", "java-maven-app-1.0-SNAPSHOT.jar"]

Jenkinsfile

@@ -1,69 +1,52 @@
 #!/usr/bin/env groovy
 
+library identifier: 'jenkins-shared-library@master', retriever: modernSCM(
+    [$class: 'GitSCMSource',
+     remote: 'https://gitlab.com/nanuchi/jenkins-shared-library.git',
+     credentialsId: 'gitlab-credentials'
+    ]
+)
+
 pipeline {
     agent any
     tools {
         maven 'Maven'
     }
+    environment {
+        IMAGE_NAME = 'nanajanashia/demo-app:java-maven-2.0'
+    }
     stages {
-        stage('increment version') {
-            steps {
-                script {
-                    echo 'incrementing app version...'
-                    sh 'mvn build-helper:parse-version versions:set \
-                        -DnewVersion=\\\${parsedVersion.majorVersion}.\\\${parsedVersion.minorVersion}.\\\${parsedVersion.nextIncrementalVersion} \
-                        versions:commit'
-                    def matcher = readFile('pom.xml') =~ '<version>(.+)</version>'
-                    def version = matcher[0][1]
-                    env.IMAGE_NAME = "$version-$BUILD_NUMBER"
-                }
-            }
-        }
         stage('build app') {
             steps {
-                script {
-                    echo "building the application..."
-                    sh 'mvn clean package'
-                }
+               script {
+                  echo 'building application jar...'
+                  buildJar()
+               }
             }
         }
         stage('build image') {
             steps {
                 script {
-                    echo "building the docker image..."
-                    withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-                        sh "docker build -t nanajanashia/demo-app:${IMAGE_NAME} ."
-                        sh "echo $PASS | docker login -u $USER --password-stdin"
-                        sh "docker push nanajanashia/demo-app:${IMAGE_NAME}"
-                    }
+                   echo 'building docker image...'
+                   buildImage(env.IMAGE_NAME)
+                   dockerLogin()
+                   dockerPush(env.IMAGE_NAME)
                 }
             }
         }
         stage('deploy') {
             steps {
                 script {
-                    withKubeConfig([credentialsId: 'k8s-credentials', serverUrl: 'https://7293fae4-4c9d-4629-bc82-262d0a2b8e3c.eu-central-2.linodelke.net']) {
-                        withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-                            sh "kubectl create secret docker-registry my-registry-key --docker-server=docker.io --docker-username=$USER --docker-password=$PASS"
-                        }
-                        sh 'envsubst < kubernetes/deployment.yaml | kubectl apply -f -'
-                    }
-                }
-            }
-        }
-        stage('commit version update') {
-            steps {
-                script {
-                    withCredentials([usernamePassword(credentialsId: 'gitlab-credentials', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-                        // git config here for the first time run
-                        sh 'git config --global user.email "jenkins@example.com"'
-                        sh 'git config --global user.name "jenkins"'
+                   echo 'deploying docker image to EC2...'
 
-                        sh "git remote set-url origin https://${USER}:${PASS}@gitlab.com/nanuchi/java-maven-app.git"
-                        sh 'git add .'
-                        sh 'git commit -m "ci: version bump"'
-                        sh 'git push origin HEAD:jenkins-jobs'
-                    }
+                   def shellCmd = "bash ./server-cmds.sh ${IMAGE_NAME}"
+                   def ec2Instance = "ec2-user@35.180.251.121"
+
+                   sshagent(['ec2-server-key']) {
+                       sh "scp -o StrictHostKeyChecking=no server-cmds.sh ${ec2Instance}:/home/ec2-user"
+                       sh "scp -o StrictHostKeyChecking=no docker-compose.yaml ${ec2Instance}:/home/ec2-user"
+                       sh "ssh -o StrictHostKeyChecking=no ${ec2Instance} ${shellCmd}"
+                   }
                 }
             }
         }

docker-compose.yaml

@@ -0,0 +1,12 @@
+version: '3.8'
+services:
+    java-maven-app:
+      image: ${IMAGE}
+      ports:
+        - 8080:8080
+    postgres:
+      image: postgres:13
+      ports:
+        - 5432:5432
+      environment:
+        - POSTGRES_PASSWORD=my-pwd

kubernetes/deployment.yaml

@@ -1,25 +0,0 @@
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: java-maven-app
-  labels:
-    app: java-maven-app
-spec:
-  replicas: 2
-  selector:
-    matchLabels:
-      app: java-maven-app
-  template:
-    metadata:
-      labels:
-        app: java-maven-app
-    spec:
-      imagePullSecrets:
-        - name: my-registry-key
-      containers:
-      - name: java-maven-app
-        image: nanajanashia/demo-app:$IMAGE_NAME
-        imagePullPolicy: Always
-        ports:
-        - containerPort: 8080
-

kubernetes/service.yaml

@@ -1,11 +0,0 @@
-apiVersion: v1
-kind: Service
-metadata:
-  name: java-maven-app
-spec:
-  selector:
-    app: java-maven-app
-  ports:
-    - protocol: TCP
-      port: 80
-      targetPort: 8080

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>java-maven-app</artifactId>
-    <version>1.1.0-SNAPSHOT</version>
+    <version>1.0-SNAPSHOT</version>
 
     <build>
         <plugins>
@@ -24,7 +24,11 @@
             </plugin>
         </plugins>
     </build>
-
+    <properties>
+        <java.version>1.8</java.version>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
     <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>

script.groovy

@@ -1,19 +0,0 @@
-def buildJar() {
-    echo "building the application..."
-    sh 'mvn package'
-} 
-
-def buildImage() {
-    echo "building the docker image..."
-    withCredentials([usernamePassword(credentialsId: 'docker-hub-repo', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-        sh 'docker build -t nanajanashia/demo-app:jma-2.0 .'
-        sh "echo $PASS | docker login -u $USER --password-stdin"
-        sh 'docker push nanajanashia/demo-app:jma-2.0'
-    }
-} 
-
-def deployApp() {
-    echo 'deploying the application...'
-} 
-
-return this

server-cmds.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+export IMAGE=$1
+docker-compose -f docker-compose.yaml up --detach
+echo "success"

src/main/resources/static/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>MyApp</title>
+</head>
+<body>
+<h1>Welcome to Java Maven Application</h1>
+<!-- add image here  <img src="" width="" /> -->
+</body>
+</html>

src/test/java/AppTest.java

@@ -0,0 +1,16 @@
+import com.example.Application;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class AppTest {
+
+    @Test
+    public void testApp() {
+        Application myApp = new Application();
+
+        String result = myApp.getStatus();
+
+        assertEquals("OK", result);
+    }
+
+}