vpc-adaptor.yaml

---
AWSTemplateFormatVersion: '2010-09-09'

Description: 'Create & Export Reusable VPC Resources'

Parameters:
  ExistingVPC:
    Description: >
      An existing VPC that will become an exported resource.
    Type: 'AWS::EC2::VPC::Id'
  ExistingPrivateSubnetA:
    Description: >
      An existing private (inside) subnet in AZ A that will become an
      exported resource.
    Type: 'AWS::EC2::Subnet::Id'
  ExistingPrivateSubnetB:
    Description: >
      An existing private (inside) subnet in AZ B that will become an
      exported resource.
    Type: 'AWS::EC2::Subnet::Id'
  ExistingPublicSubnetA:
    Description: >
      An existing public facing (edge) subnet in AZ A that will become an
      exported resource.
    Type: 'AWS::EC2::Subnet::Id'
  ExistingPublicSubnetB:
    Description: >
      An existing public facing (edge) subnet in AZ B that will become an
      exported resource.
    Type: 'AWS::EC2::Subnet::Id'

Conditions:
  AlwaysFalse: !Equals [ 'false', 'true' ]

Resources:
  DummyResource:
    # This resource does not get created, but CloudFormation requires that
    # at least one resource must be defined.
    Type: 'AWS::EC2::VPC'
    Condition: AlwaysFalse
    Properties:
      CidrBlock: '192.168.0.0/16'
      Tags:
        - Key: Name
          Value: !Sub '${AWS::StackName}'

Outputs:
  VPC:
    Description: The ID of the VPC
    Value: !Ref ExistingVPC
    Export:
      Name: !Sub "${AWS::StackName}-vpc"
  PrivateSubnetA:
    Description: The ID of the Zone A Public/Edge Subnet
    Value: !Ref ExistingPrivateSubnetA
    Export:
      Name: !Sub "${AWS::StackName}-private-subnet-a"
  PrivateSubnetB:
    Description: The ID of the Zone B Public/Edge Subnet
    Value: !Ref ExistingPrivateSubnetB
    Export:
      Name: !Sub "${AWS::StackName}-private-subnet-b"
  PrivateSubnets:
    Description: A CSV List of the Private Subnets
    Value: !Sub "${ExistingPrivateSubnetA},${ExistingPrivateSubnetB}"
    Export:
      Name: !Sub "${AWS::StackName}-private-subnets"
  PublicSubnetA:
    Description: The ID of the Zone A Public/Inside Subnet
    Value: !Ref ExistingPublicSubnetA
    Export:
      Name: !Sub "${AWS::StackName}-public-subnet-a"
  PublicSubnetB:
    Description: The ID of the Zone B Public/Inside Subnet
    Value: !Ref ExistingPublicSubnetB
    Export:
      Name: !Sub "${AWS::StackName}-public-subnet-b"
  PublicSubnets:
    Description: A CSV List of the Public Subnets
    Value: !Sub "${ExistingPublicSubnetA},${ExistingPublicSubnetB}"
    Export:
      Name: !Sub "${AWS::StackName}-public-subnets"