Update pom.xml

.gitignore

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

Dockerfile

@@ -1,8 +0,0 @@
-FROM openjdk:8-jre-alpine
-
-EXPOSE 8080
-
-COPY ./target/java-maven-app-*.jar /usr/app/
-WORKDIR /usr/app
-
-CMD java -jar java-maven-app-*.jar

Jenkinsfile

@@ -1,69 +1,36 @@
-#!/usr/bin/env groovy
+def gv
 
 pipeline {
     agent any
-    tools {
-        maven 'Maven'
-    }
     stages {
-        stage('increment version') {
+        stage("init") {
             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"
+                    gv = load "script.groovy"
                 }
             }
         }
-        stage('build app') {
+        stage("build jar") {
             steps {
                 script {
-                    echo "building the application..."
-                    sh 'mvn clean package'
+                    echo "building jar"
+                    //gv.buildJar()
                 }
             }
         }
-        stage('build image') {
+        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 image"
+                    //gv.buildImage()
                 }
             }
         }
-        stage('deploy') {
+        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"'
-
-                        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'
-                    }
+                    echo "deploying"
+                    //gv.deployApp()
                 }
             }
         }

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

@@ -22,6 +22,17 @@
                     </execution>
                 </executions>
             </plugin>
+
+            <!-- to handle any Java version mismatch, add the following configuration for maven-compiler-plugin -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.6.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 

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>