Scalable Web Application Deployment with Terraform

This project demonstrates the deployment of a scalable web application on AWS using Terraform. The infrastructure is modular, reusable, and adheres to best practices for Infrastructure as Code (IaC).

Features

Modular Approach

The infrastructure is organized into modules for better manageability and reusability:

• VPC Module: Creates a Virtual Private Cloud with subnets spread across availability zones.
• EC2 Module: Provisions instances with automated server setup using user data scripts.
• ELB Module: Configures an Elastic Load Balancer for distributing traffic evenly.
• ASG Module: Implements Auto Scaling Groups to handle varying traffic loads.

Automation

• Uses user data scripts for server provisioning and setup.
• Automates Apache installation and web page hosting.

State Management

• S3 backend with DynamoDB is used for reliable and collaborative Terraform state storage.

Scalability

• Auto Scaling Groups ensure that the application dynamically adjusts to traffic demands.

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Prerequisites

1. Terraform installed on your local machine.
2. AWS CLI configured with appropriate credentials.
3. An AWS account.

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Project Structure

project-root/
├── modules/
|   ├── vpc/       # VPC module
|   ├── ec2/       # EC2 module
|   ├── elb/       # ELB module
|   ├── asg/       # ASG module
├── envs/
|   └── scripts/   # User data scripts
└── dev/
|   ├── main.tf         # Root Terraform configuration
|   ├── variable.tf
|   ├── backend.tf
|   ├── output.tf
|   ├── terraform.tfvars

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Architectural Diagram

Usage

1. Clone the Repository

git clone <repository-url>
cd project-root

2. Initialize Terraform

terraform init

3. Validate Configuration

terraform validate

4. Plan the Infrastructure

terraform plan

5. Deploy the Infrastructure

terraform apply

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Key Variables

Variable	Description	Default Value
ami_id	AMI ID for EC2 instances	None
instance_type	Instance type for EC2 and ASG	t2.micro
vpc_cidr	CIDR block for the VPC	10.0.0.0/16

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Outputs

The project provides the following outputs:

• ELB DNS: DNS name of the Elastic Load Balancer.

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Cleanup

To destroy the infrastructure, run:

terraform destroy

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License

This project is licensed under the MIT License. See the LICENSE file for details.

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Acknowledgments

• Terraform: HashiCorp
• AWS Documentation