Terraform AWS Infrastructure Project

This project uses Terraform to provision and manage AWS infrastructure, including a Virtual Private Cloud (VPC) with public and private subnets, a bastion server, an NGINX server, and a web server.

Project Aim

Create a web infrastructure, where Nginx act as a load balancer directing traffic to web server, which is in a private subnet and communicates to public internet through NAT Gateway. The infrastructure setup is achieved with Terraform, which also creates inventory file (which references the IP addresses yet to be created) for Ansible using template. Then control server provisions the servers, using Ansible roles and templates, tasks and handlers. Master branch is the setup of Infrastructure. Combined branch is the provisioning servers with combined action of Terraform and Ansible.

Project Overview

The Terraform configuration in this project sets up the following AWS resources:

• VPC (Virtual Private Cloud): A custom VPC named "BigIronVPC" with DNS support and hostnames enabled.
• Subnets:
  • Public Subnet: For resources that need direct access to the internet.
  • Private Subnet: For resources that do not require direct internet access.
• Internet Gateway: Allows internet access for resources in the public subnet.
• NAT Gateway: Provides internet access for resources in the private subnet.
• Route Tables: Configured for both public and private subnets to manage traffic routing.
• EC2 Instances:
  • Bastion Server: Acts as a gateway to access other instances in the private subnet (Ubuntu).
  • NGINX Server: Hosts an NGINX web server (Ubuntu).
  • Web Server: A general-purpose server (CentOS).
  • Control Server: A general-purpose server running Ansible (Amazon Linux which is based on CenOS).

Prerequisites

• Terraform installed on your local machine.
• An AWS account with appropriate permissions to create VPCs, subnets, EC2 instances, security groups, and other resources.
• AWS CLI configured with your credentials.
• SSH key pairs for accessing the instances.

Installation

1. Clone the repository:

    git clone https://github.com/yourusername/your-repo-name.git
    cd your-repo-name

Starting the Terraform Project

1. Initialize Terraform:

   terraform init

2. Plan the Infrastructure:

   terraform plan

3. Apply the Configuration:

   terraform apply

By starting terraform, it runs ansible playbook automatically on control host with inline provision.This provision depends on file provision of Ansible Files to avoid error.

Destroying the Terraform Project

1. Destroy the Infrastructure:

   terraform destroy