Add optional step of preparing ansible server

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

@@ -1,68 +1,37 @@
-#!/usr/bin/env groovy
-
 pipeline {
     agent any
-    tools {
+    environment {
-        maven 'Maven'
+        ANSIBLE_SERVER = "167.99.136.157"
     }
     stages {
-        stage('increment version') {
+        stage("copy files to ansible server") {
             steps {
                 script {
-                    echo 'incrementing app version...'
+                    echo "copying all neccessary files to ansible control node"
-                    sh 'mvn build-helper:parse-version versions:set \
+                    sshagent(['ansible-server-key']) {
-                        -DnewVersion=\\\${parsedVersion.majorVersion}.\\\${parsedVersion.minorVersion}.\\\${parsedVersion.nextIncrementalVersion} \
+                        sh "scp -o StrictHostKeyChecking=no ansible/* root@${ANSIBLE_SERVER}:/root"
-                        versions:commit'
-                    def matcher = readFile('pom.xml') =~ '<version>(.+)</version>'
-                    def version = matcher[0][1]
-                    env.IMAGE_NAME = "$version-$BUILD_NUMBER"
-                }
-            }
-        }
-        stage('build app') {
-            steps {
-                script {
-                    echo "building the application..."
-                    sh 'mvn clean package'
-                }
-            }
-        }
-        stage('build image') {
-            steps {
-                script {
-                    echo "building the docker image..."
-                    withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-                        sh "docker build -t nanajanashia/demo-app:${IMAGE_NAME} ."
-                        sh "echo $PASS | docker login -u $USER --password-stdin"
-                        sh "docker push nanajanashia/demo-app:${IMAGE_NAME}"
-                    }
-                }
-            }
-        }
-        stage('deploy') {
-            steps {
-                script {
-                    withKubeConfig([credentialsId: 'k8s-credentials', serverUrl: 'https://7293fae4-4c9d-4629-bc82-262d0a2b8e3c.eu-central-2.linodelke.net']) {
-                        withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
-                            sh "kubectl create secret docker-registry my-registry-key --docker-server=docker.io --docker-username=$USER --docker-password=$PASS"
-                        }
-                        sh 'envsubst < kubernetes/deployment.yaml | kubectl apply -f -'
-                    }
-                }
-            }
-        }
-        stage('commit version update') {
-            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"
+                        withCredentials([sshUserPrivateKey(credentialsId: 'ec2-server-key', keyFileVariable: 'keyfile', usernameVariable: 'user')]) {
-                        sh 'git add .'
+                            sh 'scp $keyfile root@$ANSIBLE_SERVER:/root/ssh-key.pem'
-                        sh 'git commit -m "ci: version bump"'
+                        }
-                        sh 'git push origin HEAD:jenkins-jobs'
+                    }
+                }
+            }
+        }
+        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

kubernetes/deployment.yaml

@@ -1,25 +0,0 @@
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: java-maven-app
-  labels:
-    app: java-maven-app
-spec:
-  replicas: 2
-  selector:
-    matchLabels:
-      app: java-maven-app
-  template:
-    metadata:
-      labels:
-        app: java-maven-app
-    spec:
-      imagePullSecrets:
-        - name: my-registry-key
-      containers:
-      - name: java-maven-app
-        image: nanajanashia/demo-app:$IMAGE_NAME
-        imagePullPolicy: Always
-        ports:
-        - containerPort: 8080
-

kubernetes/service.yaml

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

pom.xml

@@ -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