cdk-v1-construct-simple-nat

Simple NAT

It's a CDK construct to create NAT instances on AWS.

It supports adding specific IP CIDRs to route tables of VPC, the network traffic to those IP CIDRs will be forwarded to the NAT instances.

Install

TypeScript/JavaScript:

yarn add cdk-construct-simple-nat

or

npm install cdk-construct-simple-nat

Usage

import { SimpleNAT } from 'cdk-construct-simple-nat';

new SimpleNAT(this, 'SimpleNAT', {
  vpc,
  natSubnetsSelection: {
    subnetType: SubnetType.PUBLIC,
    onePerAz: true,
  },
})
.withGithubRoute();

See the complete example.

FAQ

What's the difference between EC2 NAT instances and NAT instances created by this construct

There are below differences,

• EC2 NAT instance will route all Internet traffic to itself by default
• NAT instance uses depracated Amazon Linux AMI, this construct always uses latest Amazon Linux 2 AMI
• NAT instances created by this construct can work with NAT gateways together, you can have multiple NAT instances in one VPC
• This construct can help when only routing specific traffic(for example, github/gist) to NAT instances which acts as transit proxy

What's the difference between CDK built-in NAT instances and NAT instances created by this construct

• CDK built-in NAT instances has to be created with VPC stack, this construct can add NAT instances to any existing VPC
• You can use this construct multiple NAT instances for different purposes
• This construct allows you customize the instances how to route the traffic