AWS nat instance module
Terraform module which create a single NAT instance in the public subnet of a VPC that will route all private subnets egress to the NAT and then to the internet.
Using a NAT instance instead of NAT gateway is a good way to save money on development environment.
Usage
# We use VPC module for the example
module "vpc" {
source = "terraform-aws-modules/vpc/aws"
name = "vpc"
cidr = "10.0.0.0/16"
azs = ["eu-west-2a", "eu-west-2b"]
private_subnets = ["10.0.1.0/24", "10.0.2.0/24"]
public_subnets = ["10.0.101.0/24", "10.0.102.0/24"]
enable_dns_support = true
enable_dns_hostnames = true
enable_nat_gateway = false
single_nat_gateway = false
enable_vpn_gateway = false
}
module "nat" {
source = "../.."
name = "nat"
instance_type = "t4g.nano"
vpc_id = module.vpc.vpc_id
public_subnet_id = module.vpc.public_subnets[0]
private_route_table_ids = module.vpc.private_route_table_ids
}Requirements
No requirements.
Providers
| Name | Version |
|---|---|
| aws | n/a |
Modules
No modules.
Resources
| Name | Type |
|---|---|
| aws_instance.nat | resource |
| aws_network_interface.this | resource |
| aws_route.this | resource |
| aws_security_group.this | resource |
| aws_security_group_rule.egress | resource |
| aws_security_group_rule.ingress | resource |
| aws_ami.this | data source |
| aws_vpc.this | data source |
Inputs
| Name | Description | Type | Default | Required |
|---|---|---|---|---|
| enabled | Enable module | bool |
true |
no |
| instance_type | Instance type | string |
"t3.nano" |
no |
| name | Nat instance name | string |
n/a | yes |
| private_route_table_ids | IDs for private route table | list(string) |
n/a | yes |
| public_subnet_id | Public subnet ID where nat instance is deployed | string |
n/a | yes |
| tags | Optional tags for all resources | map(string) |
{} |
no |
| vpc_id | VPC Id | string |
n/a | yes |
Outputs
| Name | Description |
|---|---|
| nat_instance_public_ip | Nat instance public IP |