vpc-nat-gateway.yaml

---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'VPC: NAT Gateway for private subnets, a cloudonaut.io template'
Metadata:
  'AWS::CloudFormation::Interface':
    ParameterGroups:
    - Label:
        default: 'Parent Stacks'
      Parameters:
      - ParentVPCStack
    - Label:
        default: 'NatGateway Parameters'
      Parameters:
      - SubnetName
Parameters:
  ParentVPCStack:
    Description: Stack name of parent VPC stack based on vpc/vpc-*azs.yaml template.
    Type: String
  SubnetName:
    Description: 'Subnet name of parent VPC stack based on vpc/vpc-*azs.yaml template.'
    Type: String
    Default: SubnetAPublic
    AllowedValues:
    - SubnetAPublic
    - SubnetBPublic
    - SubnetCPublic
    - SubnetDPublic
Resources:
  EIP:
    Type: 'AWS::EC2::EIP'
    Properties:
      Domain: vpc
  NatGateway:
    Type: 'AWS::EC2::NatGateway'
    Properties:
      AllocationId: !GetAtt 'EIP.AllocationId'
      SubnetId:
        'Fn::ImportValue': !Sub '${ParentVPCStack}-${SubnetName}'
  Route:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId:
        'Fn::ImportValue': !Sub '${ParentVPCStack}-RouteTablePrivate'
      DestinationCidrBlock: '0.0.0.0/0'
      NatGatewayId: !Ref NatGateway
Outputs:
  TemplateID:
    Description: 'cloudonaut.io template id'
    Value: 'vpc/vpc-nat-gateway'
  IPAddress:
    Description: 'The public IP address of the NAT gateway.'
    Value: !Ref EIP
    Export:
      Name: !Sub '${AWS::StackName}-IPAddress'