walkthroughs/howto-cross-account/primary-account/share-resources.yaml

Parameters:
  ProjectName:
    Type: String
    Description: Project name to link stacks
  ConsumerAccountId:
    Type: String
    Description: Account Id to share resources with

Resources:
  MeshShare:
    Type: AWS::RAM::ResourceShare
    Properties:
      AllowExternalPrincipals: true
      Name: mesh-share
      Principals:
        - !Ref ConsumerAccountId
      ResourceArns:
         - !Sub 'arn:aws:appmesh:${AWS::Region}:${AWS::AccountId}:mesh/${ProjectName}-mesh'

  SubnetResourceShare:
    Type: AWS::RAM::ResourceShare
    Properties:
      AllowExternalPrincipals: true
      Name: vpc-share
      Principals:
        - !Ref ConsumerAccountId
      ResourceArns:
        - Fn::Join:
          - '/'
          - - !Sub 'arn:aws:ec2:${AWS::Region}:${AWS::AccountId}:subnet'
            - Fn::ImportValue: !Sub '${ProjectName}:PrivateSubnet1'
        - Fn::Join:
          - '/'
          - - !Sub 'arn:aws:ec2:${AWS::Region}:${AWS::AccountId}:subnet'
            - Fn::ImportValue: !Sub '${ProjectName}:PrivateSubnet2'