AWS VPC Terraform Foundation

This repository provides Terraform configuration for creating a complete AWS VPC infrastructure. It creates a production-ready VPC setup with public and private subnets across multiple availability zones.

Infrastructure Components

• VPC: Creates a VPC with customizable CIDR block (default: 10.0.0.0/16)
• Subnets:
  • 3 Private subnets across different AZs
  • 3 Public subnets across different AZs
  • Automatic CIDR block calculation using cidrsubnet function
• Networking:
  • Internet Gateway for public internet access
  • Public Route Table with route to Internet Gateway
  • Private Route Table for internal networking
  • Route Table Associations for all subnets

Variables

• aws_region: AWS region (default: us-east-1)
• vpc_name: Name of the VPC (default: omini)
• vpc_cidr: VPC CIDR block (default: 10.0.0.0/16)
• private_subnets: Map of private subnet names and their number
• public_subnets: Map of public subnet names and their number
• aws_access_key_id: (optional) AWS access key. Defaults to the AWS_ACCESS_KEY_ID environment variable if unset.
• aws_secret_access_key: (optional) AWS secret key. Defaults to the AWS_SECRET_ACCESS_KEY environment variable if unset.

Outputs

• VPC ID and CIDR block
• Public and Private Subnet IDs and CIDR blocks
• Route Table IDs
• Internet Gateway ID
• Region and Availability Zone information

Usage

1. Clone the repository
2. Configure AWS credentials using environment variables or an AWS credentials file. Do not add credentials to terraform.tfvars, otherwise Terraform will warn about undefined variables. Example:

   export AWS_ACCESS_KEY_ID=your-access-key
   export AWS_SECRET_ACCESS_KEY=your-secret-key

3. Modify variables in variables.tf if needed
4. Run:

terraform init
terraform plan
terraform apply

Requirements

• Terraform >= 1.12
• AWS Provider
• AWS credentials configured