AWS Administration Cookbook

How to do it...

1. Start with the usual CloudFormation template version and description:

      AWSTemplateFormatVersion: "2010-09-09"       Description: Create NAT Gateway and associated route.

2. The template must take the following required parameters:

      Parameters:         PublicSubnetId:           Description: Public Subnet ID to add the NAT Gateway to           Type: AWS::EC2::Subnet::Id         RouteTableId:           Description: The private subnet route table to add the NAT          Gateway route to           Type: String

3. In the Resources section, define an Elastic IP (EIP) that will be assigned to the NAT gateway:

      Resources:         EIP:           Type: AWS::EC2::EIP           Properties:             Domain: vpc

4. Create the NAT gateway resource, assigning it the EIP you just defined in the public subnet:

      NatGateway:  Type: AWS::EC2::NatGateway ...