initial commit

.gitignore

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+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/

.mvn/wrapper/MavenWrapperDownloader.java

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+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.5";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

.mvn/wrapper/maven-wrapper.properties

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+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.2/apache-maven-3.6.2-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar

Jenkinsfile

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+node {
+    properties([
+        pipelineTriggers([
+            [$class: "SCMTrigger", scmpoll_spec: "*/3 * * * *"],
+        ]),
+        buildDiscarder(logRotator(daysToKeepStr: '3', numToKeepStr: '3'))
+    ])
+
+    stage("BuildProcess"){
+        /* Requires the Docker Pipeline plugin to be installed */
+        docker.image('maven:3-alpine')
+            .inside('-v $HOME/.m2:/root/.m2 -v /var/run/docker.sock:/var/run/docker.sock --privileged') {
+                SOURCE_REPOSITORY_URL = ""
+                SOURCE_REPOSITORY_CREDENTIALS_ID = ""
+                stage('Checkout') {
+                    def scmVars = checkout([$class: 'GitSCM',
+                                branches: [[name: '*/master']],
+                                doGenerateSubmoduleConfigurations: false,
+                                extensions: [],
+                                submoduleCfg: [],
+                                userRemoteConfigs:
+                                [[credentialsId: SOURCE_REPOSITORY_CREDENTIALS_ID, url: SOURCE_REPOSITORY_URL]]])
+                    /* Detecting commit parameters */
+                    GIT_COMMIT_ID = scmVars.GIT_COMMIT
+                    PROJECT_SOURCE_BRANCH = scmVars.GIT_BRANCH
+                }
+
+                stage('PrepareParameters'){
+                    /* Preparing GKE parameters */
+                    GKE_PROJECT_ID = ""
+                    GKE_CLUSTER_NAME = ""
+                    GKE_LOCATION = ""
+                    GKE_CREDENTIALS_ID = ""
+                    DOCKER_HOST_IP = ""
+                    DOCKER_HOST_PORT = ""
+                    DOCKER_REGISTRY_CREDENTIALS_ID = ""
+                    DOCKER_IMAGE_DEFAULT_NAME = "ddemirel/simple-spring-boot-k8s-app:latest"
+                    DOCKER_IMAGE_REGISTY_NAME_PREFIX = "gcr.io/simple-cloud-project/simple-spring-boot-k8s-app"
+
+                    def matcher = readFile('pom.xml') =~ '<version>(.+?)</version>'
+                    PROJECT_MAVEN_VERSION = matcher ? matcher[0][1] : null
+                    echo "GIT_COMMIT_ID : ${GIT_COMMIT_ID}"
+                    echo "PROJECT_SOURCE_BRANCH : ${PROJECT_SOURCE_BRANCH}"
+                    echo "PROJECT_MAVEN_VERSION : ${PROJECT_MAVEN_VERSION}"
+                }
+
+                stage('Build') {
+                    sh 'mvn -DskipTests clean install'
+                }
+
+                stage('Test') {
+                    sh 'mvn test'
+                }
+
+                stage('BuildDockerImage'){
+                   sh label: 'Build',
+                      script: 'mvn "-Dmaven.test.skip" "-Ddocker.host=http://${DOCKER_HOST_IP}:${DOCKER_HOST_PORT}" docker:build'
+                }
+
+           }
+    }
+
+    stage('PushDockerImage'){
+       withDockerRegistry([credentialsId: DOCKER_REGISTRY_CREDENTIALS_ID, url: "https://gcr.io"]) {
+         sh "docker tag ${DOCKER_IMAGE_DEFAULT_NAME} ${DOCKER_IMAGE_REGISTY_NAME_PREFIX}-${PROJECT_SOURCE_BRANCH}:${PROJECT_MAVEN_VERSION}.${GIT_COMMIT_ID}"
+         sh "docker push ${DOCKER_IMAGE_REGISTY_NAME_PREFIX}-${PROJECT_SOURCE_BRANCH}:${PROJECT_MAVEN_VERSION}.${GIT_COMMIT_ID}"
+       }
+    }
+
+    stage("Deploy to GKE"){
+        path = "${workspace}/k8s-definitions.yml"
+        def fileContent = readFile(path)
+        IMAGE_NAME_VAR = "${DOCKER_IMAGE_REGISTY_NAME_PREFIX}-${PROJECT_SOURCE_BRANCH}:${PROJECT_MAVEN_VERSION}.${GIT_COMMIT_ID}"
+        /* Preparing k8s deployment script */
+        fileContent = fileContent.replaceAll("#IMAGE_NAME", IMAGE_NAME_VAR)
+
+        DEPLOYNEMT_FILE_NAME='k8s-deployment-temp.yml'
+
+        writeFile file: DEPLOYNEMT_FILE_NAME, text: fileContent
+
+        def newFileContent = readFile(DEPLOYNEMT_FILE_NAME)
+        echo newFileContent
+
+        /* Deploying to GKE */
+        step([
+            $class: 'KubernetesEngineBuilder',
+            projectId: GKE_PROJECT_ID,
+            clusterName: GKE_CLUSTER_NAME,
+            location: GKE_LOCATION,
+            manifestPattern: DEPLOYNEMT_FILE_NAME,
+            credentialsId: GKE_CREDENTIALS_ID,
+            namespace : "default",
+            verifyDeployments: true]
+            )
+    }
+}

k8s-definitions.yml

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+# DEPLOYMENT
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  annotations:
+    deployment.kubernetes.io/revision: "1"
+  generation: 5
+  labels:
+    run: simple-spring-boot-k8s-app
+  name: simple-spring-boot-k8s-app
+  namespace: default
+spec:
+  progressDeadlineSeconds: 2147483647
+  replicas: 1
+  revisionHistoryLimit: 10
+  selector:
+    matchLabels:
+      run: simple-spring-boot-k8s-app
+  strategy:
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 1
+    type: RollingUpdate
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        run: simple-spring-boot-k8s-app
+    spec:
+      containers:
+      - env:
+        - name: JAVA_OPTS
+          value: '-XX:MaxRAM=450m'
+        image: #IMAGE_NAME
+        imagePullPolicy: Always
+        name: simple-spring-boot-k8s-app
+        ports:
+        - containerPort: 9197
+          protocol: TCP
+        resources:
+          limits:
+            memory: 450Mi
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
+      dnsPolicy: ClusterFirst
+      restartPolicy: Always
+      schedulerName: default-scheduler
+      securityContext: {}
+      terminationGracePeriodSeconds: 60
+
+---
+
+# SERVICE
+
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    run: simple-spring-boot-k8s-app
+  name: simple-spring-boot-k8s-app
+  namespace: default
+spec:
+  ports:
+  - port: 8090
+    protocol: TCP
+    targetPort: 8090
+  selector:
+    run: simple-spring-boot-k8s-app
+  sessionAffinity: None
+  type: LoadBalancer
+status:
+  loadBalancer: {}
+