Cloudformation 拆分和导入值

Question

我在 CloudFormation 中有 2 个堆栈。一个是创建一个带有几个子网的 vpc，这些子网被导出以便在其他堆栈中使用。这个想法是让这些子网在其他堆栈中使用。 vpc 堆栈正确导出值，但我无法将它们导入第二个堆栈，因为它使用字符串列表。

堆栈 1：

  PrivateSubnets:
    Description: "A list of the public subnets"
    Value: !Join [ ",", [ !Ref PrivateSubnet1, !Ref PrivateSubnet2 ]]
    Export:
      Name: !Sub "${StagingArea}-PrivateSubnets"
  
  PublicSubnet1:
    Description: "Reference to the publi subnet in the 1st Availability Zone"
    Value: !Ref PublicSubnet1

  PublicSubnet2: 
    Description: "A reference to the public subnet in the 2nd Availability Zone"
    Value: !Ref PublicSubnet2

  PrivateSubnet1:
    Description: "A reference to the private subnet in the 1st Availability Zone"
    Value: !Ref PrivateSubnet1
    Export:
      Name: !Sub "${StagingArea}-PrivateSubnet1"
  PrivateSubnet2: 
    Description: "A reference to the private subnet in the 2nd Availability Zone"
    Value: !Ref PrivateSubnet2
    Export:
      Name: !Sub "${StagingArea}-PrivateSubnet2"

当我尝试将 ImportValue 导入我的第二个堆栈时，它不起作用。下面的堆栈 2：

  DbSubnetGroup:
    Type: AWS::RDS::DBSubnetGroup
    Properties:
      DBSubnetGroupDescription: !Sub "${StagingArea} RDS DB Subnet Group"
      SubnetIds: 
        - !ImportValue 'Fn::Sub': '{$StagingArea}-PrivateSubnet1'
        - !ImportValue 'Fn::Sub': '{$StagingArea}-PrivateSubnet2'

是否可以将第一个栈中的值导出到第二个栈中？我尝试了各种选择，但其中 none 似乎有效。

Answer 1

Sub 是 不正确的 （错误使用 $），最好遵循 docs 并将语句分成两行:

        - Fn::ImportValue:
            !Sub '${StagingArea}-PrivateSubnet1'
        - Fn::ImportValue:
            !Sub '${StagingArea}--PrivateSubnet2'

Cloudformation 拆分和导入值

Cloudformation Split & ImportValue

parameters

amazon-web-services

amazon-cloudformation