vpc | Patterned Designs Documentation

Overview

The vpc module creates a production-ready AWS VPC with:

Public and private subnets across multiple availability zones
NAT gateways for private subnet internet access
DNS hostnames and resolution enabled
Optional IPv6 support
Proper route tables and internet gateway

Category: Networking Provider: AWS Latest Version: 1.2.0

Quick Start

module "vpc" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "1.2.0"

  availability_zones = ["us-east-1a", "us-east-1b", "us-east-1c"]
}

Key Features

Multi-AZ Architecture

Subnets are automatically distributed across specified availability zones for high availability:

module "vpc" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "1.2.0"

  vpc_cidr           = "10.0.0.0/16"
  availability_zones = ["us-east-1a", "us-east-1b", "us-east-1c"]
}

NAT Gateway Options

Control NAT gateway deployment for cost optimization:

# High availability (default): One NAT gateway per AZ
module "vpc_ha" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "1.2.0"

  availability_zones = ["us-east-1a", "us-east-1b"]
  enable_nat_gateway = true
  single_nat_gateway = false  # One per AZ
}

# Cost-optimized: Single NAT gateway
module "vpc_dev" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "1.2.0"

  availability_zones = ["us-east-1a", "us-east-1b"]
  enable_nat_gateway = true
  single_nat_gateway = true  # Shared across AZs
}

# No NAT: Private subnets without internet access
module "vpc_isolated" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "1.2.0"

  availability_zones = ["us-east-1a", "us-east-1b"]
  enable_nat_gateway = false
}

IPv6 Support

Enable dual-stack networking:

module "vpc" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "1.2.0"

  availability_zones = ["us-east-1a", "us-east-1b"]
  enable_ipv6        = true
}