terraform-aws-vpc-m

A reusable Terraform module to provision a production-ready AWS VPC with public, private, and data subnets across multiple Availability Zones, including NAT Gateways, route tables, and tagging support.

Features

• Creates a VPC with configurable CIDR block
• Supports multiple public, private, and data subnets (default: 3 AZs)
• Deploys Internet Gateway and NAT Gateways (one per AZ)
• Creates route tables and associations for public and private subnets
• Tags all resources with project, environment, and custom tags

Usage

module "vpc" {
  source = "./terraform-aws-vpc-m"

  aws_region            = "ap-south-1"
  vpc_cidr              = "10.10.0.0/16"
  public_subnet_cidrs   = ["10.10.0.0/20", "10.10.16.0/20", "10.10.32.0/20"]
  private_subnet_cidrs  = ["10.10.48.0/20", "10.10.64.0/20", "10.10.80.0/20"]
  data_subnet_cidrs     = ["10.10.96.0/20", "10.10.112.0/20", "10.10.128.0/20"]
  environment           = "dev"
  project               = "tracemypods"
  tags = {
    Owner      = "your-name"
    Department = "DevOps"
  }
}

Inputs

Name	Description	Type	Default
aws_region	AWS region to deploy resources in	string	"ap-south-1"
vpc_cidr	CIDR block for the VPC	string	"10.10.0.0/16"
public_subnet_cidrs	List of CIDRs for public subnets	list(string)	["10.10.0.0/20", ...]
private_subnet_cidrs	List of CIDRs for private subnets	list(string)	["10.10.48.0/20", ...]
data_subnet_cidrs	List of CIDRs for data subnets	list(string)	["10.10.96.0/20", ...]
environment	Environment name (dev, staging, prod, etc.)	string	"dev"
project	Project name for tagging and resource naming	string	"tracemypods"
tags	Additional tags to apply to all resources	map(string)	{ "CreatedBy" = "Terraform" }

Outputs

Name	Description
vpc_id	The ID of the VPC
public_subnet_ids	List of IDs of public subnets
private_subnet_ids	List of IDs of private subnets
data_subnet_ids	List of IDs of data subnets
nat_gateway_ids	List of NAT Gateway IDs
public_route_table_id	The ID of the public route table
private_route_table_ids	List of private route table IDs

Requirements

• Terraform >= 1.0
• AWS Provider >= 5.0

Notes

• The module creates three subnets per type (public, private, data) by default, mapped to three AZs.
• Each private subnet gets its own NAT Gateway for high availability.
• Data subnets are intended for DBs or resources that do not require outbound internet access.

License

MIT