Add optional step of preparing ansible server

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

@@ -1,80 +1,40 @@
-#!/usr/bin/env groovy
-
-library identifier: 'jenkins-shared-library@master', retriever: modernSCM(
-    [$class: 'GitSCMSource',
-     remote: 'https://gitlab.com/nanuchi/jenkins-shared-library.git',
-     credentialsId: 'gitlab-credentials'
-    ]
-)
-
 pipeline {
     agent any
-    tools {
-        maven 'Maven'
-    }
     environment {
-        IMAGE_NAME = 'nanajanashia/demo-app:java-maven-2.0'
+        ANSIBLE_SERVER = "167.99.136.157"
     }
     stages {
-        stage('build app') {
-            steps {
-               script {
-                  echo 'building application jar...'
-                  buildJar()
-               }
-            }
-        }
-        stage('build image') {
+        stage("copy files to ansible server") {
             steps {
                 script {
-                   echo 'building docker image...'
-                   buildImage(env.IMAGE_NAME)
-                   dockerLogin()
-                   dockerPush(env.IMAGE_NAME)
-                }
-            }
-        }
-        stage('provision server') {
-            environment {
-                AWS_ACCESS_KEY_ID = credentials('jenkins_aws_access_key_id')
-                AWS_SECRET_ACCESS_KEY = credentials('jenkins_aws_secret_access_key')
-                TF_VAR_env_prefix = 'test'
-            }
-            steps {
-                script {
-                    dir('terraform') {
-                        sh "terraform init"
-                        sh "terraform apply --auto-approve"
-                        EC2_PUBLIC_IP = sh(
-                            script: "terraform output ec2_public_ip",
-                            returnStdout: true
-                        ).trim()
+                    echo "copying all neccessary files to ansible control node"
+                    sshagent(['ansible-server-key']) {
+                        sh "scp -o StrictHostKeyChecking=no ansible/* root@${ANSIBLE_SERVER}:/root"
+
+                        withCredentials([sshUserPrivateKey(credentialsId: 'ec2-server-key', keyFileVariable: 'keyfile', usernameVariable: 'user')]) {
+                            sh 'scp $keyfile root@$ANSIBLE_SERVER:/root/ssh-key.pem'
+                        }
                     }
                 }
             }
         }
-        stage('deploy') {
-            environment {
-                DOCKER_CREDS = credentials('docker-hub-repo')
-            }
+        stage("execute ansible playbook") {
             steps {
                 script {
-                   echo "waiting for EC2 server to initialize" 
-                   sleep(time: 90, unit: "SECONDS") 
+                    echo "calling ansible playbook to configure ec2 instances"
+                    def remote = [:]
+                    remote.name = "ansible-server"
+                    remote.host = ANSIBLE_SERVER
+                    remote.allowAnyHosts = true
 
-                   echo 'deploying docker image to EC2...'
-                   echo "${EC2_PUBLIC_IP}"
-
-                   def shellCmd = "bash ./server-cmds.sh ${IMAGE_NAME} ${DOCKER_CREDS_USR} ${DOCKER_CREDS_PSW}"
-                   def ec2Instance = "ec2-user@${EC2_PUBLIC_IP}"
-
-                   sshagent(['server-ssh-key']) {
-                       sh "scp -o StrictHostKeyChecking=no server-cmds.sh ${ec2Instance}:/home/ec2-user"
-                       sh "scp -o StrictHostKeyChecking=no docker-compose.yaml ${ec2Instance}:/home/ec2-user"
-                       sh "ssh -o StrictHostKeyChecking=no ${ec2Instance} ${shellCmd}"
-                   }
+                    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

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>
@@ -22,6 +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

server-cmds.sh

@@ -1,8 +0,0 @@
-#!/usr/bin/env bash
-
-export IMAGE=$1
-export DOCKER_USER=$2
-export DOCKER_PWD=$3
-echo $DOCKER_PWD | docker login -u $DOCKER_USER --password-stdin
-docker-compose -f docker-compose.yaml up --detach
-echo "success"

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
-#Thu Oct 29 12:55:55 CET 2020
-version=1.0-SNAPSHOT
-groupId=com.example
-artifactId=java-maven-app

target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

@@ -1 +0,0 @@
-com/example/Application.class

target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst

@@ -1 +0,0 @@
-/Users/nanajanashia/Demo-projects/Bootcamp/java-maven-app/src/main/java/com/example/Application.java

target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst

@@ -1 +0,0 @@
-AppTest.class

target/surefire-reports/AppTest.txt

@@ -1,4 +0,0 @@
--------------------------------------------------------------------------------
-Test set: AppTest
--------------------------------------------------------------------------------
-Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.061 sec

target/surefire-reports/TEST-AppTest.xml

@@ -1,69 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<testsuite tests="1" failures="0" name="AppTest" time="0.003" errors="0" skipped="0">
-  <properties>
-    <property name="java.runtime.name" value="Java(TM) SE Runtime Environment"/>
-    <property name="sun.boot.library.path" value="/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib"/>
-    <property name="java.vm.version" value="25.202-b08"/>
-    <property name="user.country.format" value="AT"/>
-    <property name="gopherProxySet" value="false"/>
-    <property name="java.vm.vendor" value="Oracle Corporation"/>
-    <property name="maven.multiModuleProjectDirectory" value="/Users/nanajanashia/Demo-projects/Bootcamp/java-maven-app"/>
-    <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="Java HotSpot(TM) 64-Bit Server VM"/>
-    <property name="file.encoding.pkg" value="sun.io"/>
-    <property name="user.country" value="GB"/>
-    <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="/Users/nanajanashia/Demo-projects/Bootcamp/java-maven-app"/>
-    <property name="java.runtime.version" value="1.8.0_202-b08"/>
-    <property name="java.awt.graphicsenv" value="sun.awt.CGraphicsEnvironment"/>
-    <property name="java.endorsed.dirs" value="/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/endorsed"/>
-    <property name="os.arch" value="x86_64"/>
-    <property name="java.io.tmpdir" value="/var/folders/y3/bvgmrxg950x0f1z4zt3pby3c0000gn/T/"/>
-    <property name="line.separator" value="
-"/>
-    <property name="java.vm.specification.vendor" value="Oracle Corporation"/>
-    <property name="os.name" value="Mac OS X"/>
-    <property name="classworlds.conf" value="/usr/local/Cellar/maven/3.6.0/libexec/bin/m2.conf"/>
-    <property name="sun.jnu.encoding" value="UTF-8"/>
-    <property name="java.library.path" value="/Users/nanajanashia/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:."/>
-    <property name="maven.conf" value="/usr/local/Cellar/maven/3.6.0/libexec/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="10.14.6"/>
-    <property name="library.jansi.path" value="/usr/local/Cellar/maven/3.6.0/libexec/lib/jansi-native"/>
-    <property name="http.nonProxyHosts" value="local|*.local|169.254/16|*.169.254/16"/>
-    <property name="user.home" value="/Users/nanajanashia"/>
-    <property name="user.timezone" value="Europe/Vienna"/>
-    <property name="java.awt.printerjob" value="sun.lwawt.macosx.CPrinterJob"/>
-    <property name="java.specification.version" value="1.8"/>
-    <property name="file.encoding" value="UTF-8"/>
-    <property name="user.name" value="nanajanashia"/>
-    <property name="java.class.path" value="/usr/local/Cellar/maven/3.6.0/libexec/boot/plexus-classworlds-2.5.2.jar"/>
-    <property name="java.vm.specification.version" value="1.8"/>
-    <property name="sun.arch.data.model" value="64"/>
-    <property name="java.home" value="/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre"/>
-    <property name="sun.java.command" value="org.codehaus.plexus.classworlds.launcher.Launcher test"/>
-    <property name="java.specification.vendor" value="Oracle Corporation"/>
-    <property name="user.language" value="en"/>
-    <property name="awt.toolkit" value="sun.lwawt.macosx.LWCToolkit"/>
-    <property name="java.vm.info" value="mixed mode"/>
-    <property name="java.version" value="1.8.0_202"/>
-    <property name="java.ext.dirs" value="/Users/nanajanashia/Library/Java/Extensions:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/ext:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java"/>
-    <property name="sun.boot.class.path" value="/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/classes"/>
-    <property name="java.vendor" value="Oracle Corporation"/>
-    <property name="maven.home" value="/usr/local/Cellar/maven/3.6.0/libexec"/>
-    <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="UnicodeBig"/>
-    <property name="socksNonProxyHosts" value="local|*.local|169.254/16|*.169.254/16"/>
-    <property name="ftp.nonProxyHosts" value="local|*.local|169.254/16|*.169.254/16"/>
-    <property name="sun.cpu.isalist" value=""/>
-  </properties>
-  <testcase classname="AppTest" name="testApp" time="0.003"/>
-</testsuite>

terraform/.terraform.lock.hcl

@@ -1,19 +0,0 @@
-# This file is maintained automatically by "terraform init".
-# Manual edits may be lost in future updates.
-
-provider "registry.terraform.io/hashicorp/aws" {
-  version = "3.22.0"
-  hashes = [
-    "h1:f/Tz8zv1Zb78ZaiyJkQ0MGIViZwbYrLuQk3kojPM91c=",
-    "zh:4a9a66caf1964cdd3b61fb3ebb0da417195a5529cb8e496f266b0778335d11c8",
-    "zh:514f2f006ae68db715d86781673faf9483292deab235c7402ff306e0e92ea11a",
-    "zh:5277b61109fddb9011728f6650ef01a639a0590aeffe34ed7de7ba10d0c31803",
-    "zh:67784dc8c8375ab37103eea1258c3334ee92be6de033c2b37e3a2a65d0005142",
-    "zh:76d4c8be2ca4a3294fb51fb58de1fe03361d3bc403820270cc8e71a04c5fa806",
-    "zh:8f90b1cfdcf6e8fb1a9d0382ecaa5056a3a84c94e313fbf9e92c89de271cdede",
-    "zh:d0ac346519d0df124df89be2d803eb53f373434890f6ee3fb37112802f9eac59",
-    "zh:d6256feedada82cbfb3b1dd6dd9ad02048f23120ab50e6146a541cb11a108cc1",
-    "zh:db2fe0d2e77c02e9a74e1ed694aa352295a50283f9a1cf896e5be252af14e9f4",
-    "zh:eda61e889b579bd90046939a5b40cf5dc9031fb5a819fc3e4667a78bd432bdb2",
-  ]
-}

terraform/entry-script.sh

@@ -1,8 +0,0 @@
-#!/bin/bash
-sudo yum update -y && sudo yum install -y docker
-sudo systemctl start docker 
-sudo usermod -aG docker ec2-user
-
-# install docker-compose 
-sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
-sudo chmod +x /usr/local/bin/docker-compose

terraform/main.tf

@@ -1,112 +0,0 @@
-terraform {
-    required_version = ">= 0.12"
-    backend "s3" {
-        bucket = "myapp-bucket"
-        key = "myapp/state.tfstate"
-        region = "eu-west-3"
-    }
-}
-
-provider "aws" {
-    region = var.region
-}
-
-resource "aws_vpc" "myapp-vpc" {
-    cidr_block = var.vpc_cidr_block
-    tags = {
-        Name: "${var.env_prefix}-vpc"
-    }
-}
-
-resource "aws_subnet" "myapp-subnet-1" {
-    vpc_id = aws_vpc.myapp-vpc.id
-    cidr_block = var.subnet_cidr_block
-    availability_zone = var.avail_zone
-    tags = {
-        Name: "${var.env_prefix}-subnet-1"
-    }
-}
-
-resource "aws_internet_gateway" "myapp-igw" {
-    vpc_id = aws_vpc.myapp-vpc.id
-    tags = {
-        Name: "${var.env_prefix}-igw"
-    }
-}
-
-resource "aws_default_route_table" "main-rtb" {
-    default_route_table_id = aws_vpc.myapp-vpc.default_route_table_id
-
-    route {
-        cidr_block = "0.0.0.0/0"
-        gateway_id = aws_internet_gateway.myapp-igw.id
-    }
-    tags = {
-        Name: "${var.env_prefix}-main-rtb"
-    }
-}
-
-resource "aws_default_security_group" "default-sg" {
-    vpc_id = aws_vpc.myapp-vpc.id
-
-    ingress {
-        from_port = 22
-        to_port = 22
-        protocol = "tcp"
-        cidr_blocks = [var.my_ip, var.jenkins_ip]
-    }
-
-    ingress {
-        from_port = 8080
-        to_port = 8080
-        protocol = "tcp"
-        cidr_blocks = ["0.0.0.0/0"]
-    }
-
-    egress {
-        from_port = 0
-        to_port = 0
-        protocol = "-1"
-        cidr_blocks = ["0.0.0.0/0"]
-        prefix_list_ids = []
-    }
-
-    tags = {
-        Name: "${var.env_prefix}-default-sg"
-    }
-}
-
-data "aws_ami" "latest-amazon-linux-image" {
-    most_recent = true
-    owners = ["amazon"]
-    filter {
-        name = "name"
-        values = ["amzn2-ami-hvm-*-x86_64-gp2"]
-    }
-    filter {
-        name = "virtualization-type"
-        values = ["hvm"]
-    }
-}
-
-resource "aws_instance" "myapp-server" {
-    ami = data.aws_ami.latest-amazon-linux-image.id
-    instance_type = var.instance_type
-
-    subnet_id = aws_subnet.myapp-subnet-1.id
-    vpc_security_group_ids = [aws_default_security_group.default-sg.id]
-    availability_zone = var.avail_zone
-
-    associate_public_ip_address = true
-    key_name = "myapp-key-pair"
-
-    user_data = file("entry-script.sh")
-
-    tags = {
-        Name = "${var.env_prefix}-server"
-    }
-}
-
-output "ec2_public_ip" {
-    value = aws_instance.myapp-server.public_ip
-}

terraform/variables.tf

@@ -1,24 +0,0 @@
-variable vpc_cidr_block {
-    default = "10.0.0.0/16"
-}
-variable subnet_cidr_block {
-    default = "10.0.10.0/24"
-}
-variable avail_zone {
-    default = "eu-west-3a"
-}
-variable env_prefix {
-    default = "dev"
-}
-variable my_ip {
-    default = "212.124.154.110/32"
-}
-variable jenkins_ip {
-    default = "139.59.140.177/32"
-}
-variable instance_type {
-    default = "t2.micro"
-}
-variable region {
-    default = "eu-west-3"
-}