Update pom.xml

Jenkinsfile-basic

@@ -0,0 +1,28 @@
+#!/usr/bin/env groovy
+
+pipeline {
+    agent none
+    stages {
+        stage('build') {
+            steps {
+                script {
+                    echo "Building the application..."
+                }
+            }
+        }
+        stage('test') {
+            steps {
+                script {
+                    echo "Testing the application..."
+                }
+            }
+        }
+        stage('deploy') {
+            steps {
+                script {
+                    echo "Deploying the application..."
+                }
+            }
+        }
+    }
+}

Jenkinsfile-kubernetes/Jenkinsfile

@@ -0,0 +1,75 @@
+#!/usr/bin/env groovy
+
+pipeline {
+    agent any
+    tools {
+        maven 'Maven'
+    }
+    environment {
+        DOCKER_REPO_SERVER = '664574038682.dkr.ecr.eu-west-3.amazonaws.com'
+        DOCKER_REPO = "${DOCKER_REPO_SERVER}/java-maven-app"
+    }
+    stages {
+        stage('increment version') {
+            steps {
+                script {
+                    echo 'incrementing app version...'
+                    sh 'mvn build-helper:parse-version versions:set \
+                        -DnewVersion=\\\${parsedVersion.majorVersion}.\\\${parsedVersion.minorVersion}.\\\${parsedVersion.nextIncrementalVersion} \
+                        versions:commit'
+                    def matcher = readFile('pom.xml') =~ '<version>(.+)</version>'
+                    def version = matcher[0][1]
+                    env.IMAGE_NAME = "$version-$BUILD_NUMBER"
+                }
+            }
+        }
+        stage('build app') {
+            steps {
+               script {
+                   echo "building the application..."
+                   sh 'mvn clean package'
+               }
+            }
+        }
+        stage('build image') {
+            steps {
+                script {
+                    echo "building the docker image..."
+                    withCredentials([usernamePassword(credentialsId: 'ecr-credentials', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
+                        sh "docker build -t ${DOCKER_REPO}:${IMAGE_NAME} ."
+                        sh "echo $PASS | docker login -u $USER --password-stdin ${DOCKER_REPO_SERVER}"
+                        sh "docker push ${DOCKER_REPO}:${IMAGE_NAME}"
+                    }
+                }
+            }
+        }
+        stage('deploy') {
+            environment {
+                AWS_ACCESS_KEY_ID = credentials('jenkins_aws_access_key_id')
+                AWS_SECRET_ACCESS_KEY = credentials('jenkins_aws_secret_access_key')
+                APP_NAME = 'java-maven-app'
+            }
+            steps {
+                script {
+                    echo 'deploying docker image...'
+                    sh 'envsubst < kubernetes/deployment.yaml | kubectl apply -f -'
+                    sh 'envsubst < kubernetes/service.yaml | kubectl apply -f -'
+                }
+            }
+        }
+        stage('commit version update') {
+            steps {
+                script {
+                    withCredentials([usernamePassword(credentialsId: 'gitlab-credentials', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
+                        sh 'git config user.email "jenkins@example.com"'
+                        sh 'git config 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'
+                    }
+                }
+            }
+        }
+    }
+}

Jenkinsfile-simple-pipeline/Jenkinsfile

@@ -0,0 +1,40 @@
+#!/usr/bin/env groovy
+
+def gv
+
+pipeline {
+    agent any
+    tools {
+        maven 'Maven'
+    }
+    stages {
+        stage("init") {
+            steps {
+                script {
+                    gv = load "script.groovy"
+                }
+            }
+        }
+        stage("build jar") {
+            steps {
+                script {
+                    gv.buildJar()
+                }
+            }
+        }
+        stage("build image") {
+            steps {
+                script {
+                    gv.buildImage()
+                }
+            }
+        }
+        stage("deploy") {
+            steps {
+                script {
+                    gv.deployApp()
+                }
+            }
+        }
+    }
+}

Jenkinsfile-simple-pipeline/script.groovy

@@ -0,0 +1,19 @@
+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

Jenkinsfile-syntax/Jenkinsfile

@@ -0,0 +1,49 @@
+#!/usr/bin/env groovy
+
+def gv
+
+pipeline {
+    agent any
+    parameters {
+        choice(name: 'VERSION', choices: ['1.1.0', '1.2.0', '1.3.0'], description: '')
+        booleanParam(name: 'executeTests', defaultValue: true, description: '')
+    }
+    stages {
+        stage("init") {
+            steps {
+                script {
+                   gv = load "script.groovy"
+                }
+            }
+        }
+        stage("build") {
+            steps {
+                script {
+                    gv.buildApp()
+                }
+            }
+        }
+        stage("test") {
+            when {
+                expression {
+                    params.executeTests
+                }
+            }
+            steps {
+                script {
+                    gv.testApp()
+                }
+            }
+        }
+        stage("deploy") {
+            steps {
+                script {
+                    env.ENV = input message: "Select the environment to deploy to", ok: "Done", parameters: [choice(name: 'ONE', choices: ['dev', 'staging', 'prod'], description: '')]
+
+                    gv.deployApp()
+                    echo "Deploying to ${ENV}"
+                }
+            }
+        }
+    }
+}

Jenkinsfile-syntax/script.groovy

@@ -0,0 +1,19 @@
+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

Jenkinsfile-version-increment/Jenkinsfile

@@ -50,6 +50,10 @@ pipeline {
             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"'

freestyle-build.sh

@@ -0,0 +1 @@
+npm --version

kubernetes/deployment.yaml

@@ -0,0 +1,24 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: $APP_NAME
+  labels:
+    app: $APP_NAME
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: $APP_NAME
+  template:
+    metadata:
+      labels:
+        app: $APP_NAME
+    spec:
+      imagePullSecrets:
+        - name: aws-registry-key
+      containers:
+        - name: $APP_NAME
+          image: $DOCKER_REPO:$IMAGE_NAME
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 8080

kubernetes/service.yaml

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

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>java-maven-app</artifactId>
-    <version>1.1.4</version>
+    <version>1.1.7</version>
 
     <build>
         <plugins>
@@ -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>
 

target/maven-archiver/pom.properties

@@ -1,5 +1,5 @@
 #Generated by Maven
-#Sun Nov 29 08:01:35 UTC 2020
-version=1.1.4
+#Sat Dec 05 15:54:34 UTC 2020
+version=1.1.7
 groupId=com.example
 artifactId=java-maven-app

target/surefire-reports/AppTest.txt

@@ -1,4 +1,4 @@
 -------------------------------------------------------------------------------
 Test set: AppTest
 -------------------------------------------------------------------------------
-Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.096 sec
+Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.099 sec