Automating cloud infrastructure is a foundational DevOps practice that ensures consistency, repeatability, and reliability. This project demonstrates how to provision AWS infrastructure using Terraform and then automate the entire workflow using a CI/CD pipeline. By combining infrastructure as code with automation, teams can deploy, update, and remove resources in a controlled and predictable manner.

The approach emphasizes best practices such as modular Terraform design, remote state management, secure credential handling, and manual approval gates for critical actions.

Project Scope and Prerequisites

The objective of this project is to automate AWS infrastructure deployment using Terraform modules and a remote backend, then integrate the workflow into a CI/CD pipeline. The process starts with manual validation of the infrastructure and gradually evolves into a fully automated deployment system.

This implementation is considered advanced and assumes prior knowledge of Terraform concepts such as providers, modules, variables, outputs, and meta-arguments. A basic understanding of CI/CD pipelines and version control workflows is also required.

Required Tools and Accounts

Several tools and accounts are necessary to complete the project:

• An AWS account to provision and manage cloud resources such as networking and compute services
• Terraform installed locally to write, test, and validate infrastructure code
• A Git-based repository hosting service to store the code and execute CI/CD pipelines, with account verification enabled if required
• The AWS Command Line Interface configured locally to authenticate Terraform with AWS using access credentials
• A code editor to write and manage Terraform files efficiently

Manual Infrastructure Configuration with Terraform

Before introducing automation, the infrastructure is built and tested manually. This step is critical because it verifies that the Terraform configuration works correctly and reduces troubleshooting complexity once CI/CD is added.

Initial Project Setup and Provider Configuration

The project begins by creating a dedicated directory for the Terraform configuration and opening it in a code editor. The AWS provider is defined in a provider configuration file, where the target region is specified. For example, setting a region ensures that all resources are created consistently in the same geographical location.

Core Terraform files are created to separate concerns. One file defines provider settings, another contains resource definitions, and a third manages input variables. This structure keeps the code organized and easier to maintain as the project grows.

Modular Infrastructure Design

To follow production-level best practices, the infrastructure is divided into reusable modules. Each module is responsible for a specific part of the architecture, making the code easier to manage and reuse in other environments.

Virtual Private Cloud Module