CI-CD flow using Jenkins/Terraform/Ansible/Docker

This is a demo project for provisiong server, configuring server and deploying a backend app using Jenkins + Terraform + Ansible.

Notice: Docker image of the backend application is built automatically by Github Action.

Prerequisites

1. Install Jenkins server

Guide : https://www.digitalocean.com/community/tutorials/how-to-install-jenkins-on-ubuntu-20-04

2. Install Ansible and Terraform

Install Ansible

apt-get update && apt-get install -y ansible

Install Terraform

sudo apt-get update && sudo apt-get install -y gnupg software-properties-common curl
curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -
sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"
sudo apt-get update && sudo apt-get install terraform

3. Create a key for AWS Key Pair

This is a key used for connecting to AWS EC2 Instance provisioned using Terraform.

sudo su jenkins
ssh-keygen -f ~/.ssh/aws_key

4. Configure AWS credential file

This is a credential file for connecting to AWS services. This credential file is used by Terraform.

sudo su jenkins
mkdir ~/.aws
nano ~/.aws/credentials

And add the content below with the approriate values.

[default]
aws_access_key_id = <access_key>
aws_secret_access_key = <secret_key>

Configure Jenkins

Setup Ansible and Terraform tools

Install ansible and terraform plugins in Jenkins -> Manage Plugins -> Available.

Confirm the installation directory for ansible/terraform binaries inside Jenkins server. Then set the tool name and the installation directory under Ansible/Terraform in Jenkins -> Manage Plugins -> Global Tool Configuration.

Create a pipeline

Create a Pipeline job (New Item -> Pipeline) and set Jenkinsfile under Pipeline script from SCM.

Once a Pipeline job created, please build it. It will provision an AWS EC2 server and install everything, finally deploy the backend service.

Check Backend endpoint.

The final stage Backend Url of the pipeline should show the backend url. Then open it on web browser.