custom-domain.yml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

##########################################################################
#  Parameters                                                            #
##########################################################################
Parameters:
  StageName:
    Description: The name of the stage is the first path segment in the Uniform Resource Identifier (URI) of a call to API Gateway
    Type: String
    Default: test
  DomainName:
    Type: String
  CertId:
    Type: String
  ApiOneId:
    Description: ApiOne id of the endpoint associated
    Type: String
  ApiTwoId:
    Description: ApiTwo id of the endpoint associated
    Type: String

Resources:
##########################################################################
#  API Gateway Custom Domain                               
# ##########################################################################
  CustomDomainName:
    Type: AWS::ApiGateway::DomainName
    Properties:
      RegionalCertificateArn: !Sub "arn:aws:acm:${AWS::Region}:${AWS::AccountId}:certificate/${CertId}"
      DomainName: !Ref DomainName
      EndpointConfiguration:
        Types:
          - REGIONAL
      Tags:
        - Key: Name
          Value: !Ref AWS::StackName
        - Key: env
          Value: !Ref StageName

  ApiOneMapping:
    Type: AWS::ApiGateway::BasePathMapping
    DependsOn: CustomDomainName
    Properties:
      RestApiId: !Ref ApiOneId
      DomainName: !Ref CustomDomainName
      BasePath: 'one'
      Stage: !Ref StageName

  ApiTwoMapping:
    Type: AWS::ApiGateway::BasePathMapping
    DependsOn: CustomDomainName
    Properties:
      RestApiId: !Ref ApiTwoId
      DomainName: !Ref CustomDomainName
      BasePath: 'two'
      Stage: !Ref StageName

Outputs:
  RegionalHostedZoneId:
    Description: The regional hosted zone id of the custom domain
    Value: !GetAtt CustomDomainName.RegionalHostedZoneId
    Export:
      Name: !Sub ${AWS::StackName}-RegionalHostedZoneId

  RegionalDomainName:
    Description: The regional domain name of the custom domain
    Value: !GetAtt CustomDomainName.RegionalDomainName
    Export:
      Name: !Sub ${AWS::StackName}-RegionalDomainName