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-1.0-SNAPSHOT.jar /usr/app/
-WORKDIR /usr/app
-
-ENTRYPOINT ["java", "-jar", "java-maven-app-1.0-SNAPSHOT.jar"]

Jenkinsfile

@@ -1,51 +1,37 @@
-#!/usr/bin/env groovy
-
-library identifier: 'jenkins-shared-library@master', retriever: modernSCM(
-    [$class: 'GitSCMSource',
-     remote: 'https://gitlab.com/nanuchi/jenkins-shared-library.git',
-     credentialsId: 'gitlab-credentials'
-    ]
-)
-
 pipeline {
     agent any
-    tools {
-        maven 'Maven'
-    }
     environment {
-        IMAGE_NAME = 'nanajanashia/demo-app:java-maven-2.0'
+        ANSIBLE_SERVER = "167.99.136.157"
     }
     stages {
-        stage('build app') {
+        stage("copy files to ansible server") {
             steps {
                 script {
-                  echo 'building application jar...'
+                    echo "copying all neccessary files to ansible control node"
-                  buildJar()
+                    sshagent(['ansible-server-key']) {
-               }
+                        sh "scp -o StrictHostKeyChecking=no ansible/* root@${ANSIBLE_SERVER}:/root"
-            }
-        }
-        stage('build image') {
-            steps {
-                script {
-                   echo 'building docker image...'
-                   buildImage(env.IMAGE_NAME)
-                   dockerLogin()
-                   dockerPush(env.IMAGE_NAME)
-                }
-            }
-        }
-        stage('deploy') {
-            steps {
-                script {
-                   echo 'deploying docker image to EC2...'
 
-                   def shellCmd = "bash ./server-cmds.sh ${IMAGE_NAME}"
+                        withCredentials([sshUserPrivateKey(credentialsId: 'ec2-server-key', keyFileVariable: 'keyfile', usernameVariable: 'user')]) {
-                   def ec2Instance = "ec2-user@35.180.251.121"
+                            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
 
-                   sshagent(['ec2-server-key']) {
+                    withCredentials([sshUserPrivateKey(credentialsId: 'ansible-server-key', keyFileVariable: 'keyfile', usernameVariable: 'user')]){
-                       sh "scp -o StrictHostKeyChecking=no server-cmds.sh ${ec2Instance}:/home/ec2-user"
+                        remote.user = user
-                       sh "scp -o StrictHostKeyChecking=no docker-compose.yaml ${ec2Instance}:/home/ec2-user"
+                        remote.identityFile = keyfile
-                       sh "ssh -o StrictHostKeyChecking=no ${ec2Instance} ${shellCmd}"
+                        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

docker-compose.yaml

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

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>java-maven-app</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>1.1.0-SNAPSHOT</version>
 
     <build>
         <plugins>
@@ -22,13 +22,20 @@
                     </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>
-    <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>

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

server-cmds.sh

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

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);
-    }
-
-}