single_nat_gateway | Patterned Designs Documentation

Type bool

Default true

Module vpc

Use a single NAT gateway instead of one per AZ

Single vs Multiple NAT Gateways

Configuration	Cost	Availability
Single NAT	Lower	Single point of failure
Per-AZ NAT	Higher	High availability

Best Practices

Use single NAT for development/testing
Use per-AZ NAT for production

Full Module Example

module "vpc" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/vpc/aws"
  version = "0.1.0"

  # single_nat_gateway
  single_nat_gateway = "..."

  # Other required inputs
  name = "..."
  vpc_cidr = "..."
  availability_zones = "..."
}