Add optional step of preparing ansible server

.gitignore

@@ -1,2 +1 @@
 .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

@@ -1,31 +1,40 @@
-#!/usr/bin/env groovy
-
 pipeline {
     agent any
-    stages {
+    environment {
-        stage('build app') {
+        ANSIBLE_SERVER = "167.99.136.157"
-            steps {
-               script {
-                   echo "building the application..."
-               }
-            }
-        }
-        stage('build image') {
-            steps {
-                script {
-                    echo "building the docker image..."
-                }
-            }
-        }
-        stage('deploy') {
-            steps {
-                script {
-                   echo 'deploying docker image...'
-                   withKubeConfig([credentialsId: 'lke-credentials', serverUrl: 'https://79fa9228-1d11-47ec-870b-33106d53122b.eu-central-2.linodelke.net']) {
-                       sh 'kubectl create deployment nginx-deployment --image=nginx'
-                   }
-                }
-            }
-        }
     }
-}
+    stages {
+        stage("copy files to ansible server") {
+            steps {
+                script {
+                    echo "copying all neccessary files to ansible control node"
+                    sshagent(['ansible-server-key']) {
+                        sh "scp -o StrictHostKeyChecking=no ansible/* root@${ANSIBLE_SERVER}:/root"
+
+                        withCredentials([sshUserPrivateKey(credentialsId: 'ec2-server-key', keyFileVariable: 'keyfile', usernameVariable: 'user')]) {
+                            sh 'scp $keyfile root@$ANSIBLE_SERVER:/root/ssh-key.pem'
+                        }
+                    }
+                }
+            }
+        }
+        stage("execute ansible playbook") {
+            steps {
+                script {
+                    echo "calling ansible playbook to configure ec2 instances"
+                    def remote = [:]
+                    remote.name = "ansible-server"
+                    remote.host = ANSIBLE_SERVER
+                    remote.allowAnyHosts = true
+
+                    withCredentials([sshUserPrivateKey(credentialsId: 'ansible-server-key', keyFileVariable: 'keyfile', usernameVariable: 'user')]){
+                        remote.user = user
+                        remote.identityFile = keyfile
+                        sshScript remote: remote, script: "prepare-ansible-server.sh"
+                        sshCommand remote: remote, command: "ansible-playbook my-playbook.yaml"
+                    }
+                }
+            }
+        }
+    }   
+}

ansible/ansible.cfg

@@ -0,0 +1,9 @@
+[defaults]
+host_key_checking = False
+inventory = inventory_aws_ec2.yaml
+
+interpreter_python = /usr/bin/python3
+enable_plugins = aws_ec2
+
+remote_user = ec2-user
+private_key_file = ~/ssh-key.pem

ansible/inventory_aws_ec2.yaml

@@ -0,0 +1,9 @@
+---
+plugin: aws_ec2
+regions: 
+  - eu-west-3
+keyed_groups:
+  - key: tags
+    prefix: tag
+  - key: instance_type
+    prefix: instance_type

ansible/my-playbook.yaml

@@ -0,0 +1,29 @@
+---
+- name: Install python3, docker, docker-compose
+  hosts: all
+  become: yes
+  gather_facts: False
+  tasks:
+    - name: Install python3 and docker
+      vars:
+        ansible_python_interpreter: /usr/bin/python
+      yum:
+        name:
+          - python3
+          - docker
+        update_cache: yes
+        state: present
+    - name: Install Docker-compose
+      get_url: 
+        url: https://github.com/docker/compose/releases/download/1.27.4/docker-compose-Linux-{{lookup('pipe', 'uname -m')}}
+        dest: /usr/local/bin/docker-compose
+        mode: +x
+    - name: Start docker daemon
+      systemd:
+        name: docker
+        state: started
+    - name: Install docker python module
+      pip:
+        name: 
+          - docker
+          - docker-compose

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>java-maven-app</artifactId>
-    <version>1.1.4</version>
+    <version>1.1.0-SNAPSHOT</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>
 

prepare-ansible-server.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+apt update
+apt install ansible -y
+apt install python3-pip -y
+pip3 install boto3 botocore

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

src/main/resources/static/index.html

@@ -1,11 +0,0 @@
-<!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

@@ -1,16 +0,0 @@
-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);
-    }
-
-}

target/maven-archiver/pom.properties

@@ -1,5 +0,0 @@
-#Generated by Maven
-#Sun Nov 29 08:01:35 UTC 2020
-version=1.1.4
-groupId=com.example
-artifactId=java-maven-app

target/surefire-reports/AppTest.txt

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

target/surefire-reports/TEST-AppTest.xml

@@ -1,64 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<testsuite tests="1" failures="0" name="AppTest" time="0.01" errors="0" skipped="0">
-  <properties>
-    <property name="java.runtime.name" value="OpenJDK Runtime Environment"/>
-    <property name="sun.boot.library.path" value="/usr/local/openjdk-8/jre/lib/amd64"/>
-    <property name="java.vm.version" value="25.242-b08"/>
-    <property name="java.vm.vendor" value="Oracle Corporation"/>
-    <property name="maven.multiModuleProjectDirectory" value="/var/jenkins_home/workspace/java-maven-app_jenkins-jobs"/>
-    <property name="java.vendor.url" value="http://java.oracle.com/"/>
-    <property name="path.separator" value=":"/>
-    <property name="guice.disable.misplaced.annotation.check" value="true"/>
-    <property name="java.vm.name" value="OpenJDK 64-Bit Server VM"/>
-    <property name="file.encoding.pkg" value="sun.io"/>
-    <property name="sun.java.launcher" value="SUN_STANDARD"/>
-    <property name="sun.os.patch.level" value="unknown"/>
-    <property name="java.vm.specification.name" value="Java Virtual Machine Specification"/>
-    <property name="user.dir" value="/var/jenkins_home/workspace/java-maven-app_jenkins-jobs"/>
-    <property name="java.runtime.version" value="1.8.0_242-b08"/>
-    <property name="java.awt.graphicsenv" value="sun.awt.X11GraphicsEnvironment"/>
-    <property name="java.endorsed.dirs" value="/usr/local/openjdk-8/jre/lib/endorsed"/>
-    <property name="os.arch" value="amd64"/>
-    <property name="java.io.tmpdir" value="/tmp"/>
-    <property name="line.separator" value="
-"/>
-    <property name="java.vm.specification.vendor" value="Oracle Corporation"/>
-    <property name="os.name" value="Linux"/>
-    <property name="classworlds.conf" value="/var/jenkins_home/tools/hudson.tasks.Maven_MavenInstallation/Maven/bin/m2.conf"/>
-    <property name="sun.jnu.encoding" value="UTF-8"/>
-    <property name="java.library.path" value="/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib"/>
-    <property name="maven.conf" value="/var/jenkins_home/tools/hudson.tasks.Maven_MavenInstallation/Maven/conf"/>
-    <property name="java.specification.name" value="Java Platform API Specification"/>
-    <property name="java.class.version" value="52.0"/>
-    <property name="sun.management.compiler" value="HotSpot 64-Bit Tiered Compilers"/>
-    <property name="os.version" value="5.4.0-51-generic"/>
-    <property name="library.jansi.path" value="/var/jenkins_home/tools/hudson.tasks.Maven_MavenInstallation/Maven/lib/jansi-native"/>
-    <property name="user.home" value="/var/jenkins_home"/>
-    <property name="user.timezone" value="Etc/UTC"/>
-    <property name="java.awt.printerjob" value="sun.print.PSPrinterJob"/>
-    <property name="java.specification.version" value="1.8"/>
-    <property name="file.encoding" value="UTF-8"/>
-    <property name="user.name" value="jenkins"/>
-    <property name="java.class.path" value="/var/jenkins_home/tools/hudson.tasks.Maven_MavenInstallation/Maven/boot/plexus-classworlds-2.6.0.jar"/>
-    <property name="java.vm.specification.version" value="1.8"/>
-    <property name="sun.arch.data.model" value="64"/>
-    <property name="java.home" value="/usr/local/openjdk-8/jre"/>
-    <property name="sun.java.command" value="org.codehaus.plexus.classworlds.launcher.Launcher clean package"/>
-    <property name="java.specification.vendor" value="Oracle Corporation"/>
-    <property name="user.language" value="en"/>
-    <property name="awt.toolkit" value="sun.awt.X11.XToolkit"/>
-    <property name="java.vm.info" value="mixed mode"/>
-    <property name="java.version" value="1.8.0_242"/>
-    <property name="java.ext.dirs" value="/usr/local/openjdk-8/jre/lib/ext:/usr/java/packages/lib/ext"/>
-    <property name="securerandom.source" value="file:/dev/./urandom"/>
-    <property name="sun.boot.class.path" value="/usr/local/openjdk-8/jre/lib/resources.jar:/usr/local/openjdk-8/jre/lib/rt.jar:/usr/local/openjdk-8/jre/lib/sunrsasign.jar:/usr/local/openjdk-8/jre/lib/jsse.jar:/usr/local/openjdk-8/jre/lib/jce.jar:/usr/local/openjdk-8/jre/lib/charsets.jar:/usr/local/openjdk-8/jre/lib/jfr.jar:/usr/local/openjdk-8/jre/classes"/>
-    <property name="java.vendor" value="Oracle Corporation"/>
-    <property name="maven.home" value="/var/jenkins_home/tools/hudson.tasks.Maven_MavenInstallation/Maven"/>
-    <property name="file.separator" value="/"/>
-    <property name="java.vendor.url.bug" value="http://bugreport.sun.com/bugreport/"/>
-    <property name="sun.cpu.endian" value="little"/>
-    <property name="sun.io.unicode.encoding" value="UnicodeLittle"/>
-    <property name="sun.cpu.isalist" value=""/>
-  </properties>
-  <testcase classname="AppTest" name="testApp" time="0.01"/>
-</testsuite>