Cloudformation 模板 Lambda 环境变量错误 - 属性变量的值必须是带有字符串的对象

Question

我想使用 cloudformation 映射为我的 lambda 函数设置环境变量。因此我使用Fn::FindInMap 从映射中获取变量的值。但我收到了错误 - Value of property Variables must be an object with String (or simple type) properties

Mappings:
  DomainResourceMapping:
    DUBCrossAccountIAMRole:
      beta: "xyz"
      prod: "act"

Resources:
  LambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: '...t'
      Runtime: java8
      CodeUri:
        Bucket: ...
        Key: ...
      Description: nn
      Timeout: 20
      MemorySize: 512
      Environment:
        Variables:
          DUB_CROSS_ACCOUNT_IAM_ROLE:
          - Fn::FindInMap:
            - DomainResourceMapping
            - DUBCrossAccountIAMRole
            - {Ref: Stage}

Answer 1

您将DUB_CROSS_ACCOUNT_IAM_ROLE 设置为一个数组。试试

 Environment:
    Variables:
      DUB_CROSS_ACCOUNT_IAM_ROLE:
        Fn::FindInMap:
        - DomainResourceMapping
        - DUBCrossAccountIAMRole
        - {Ref: Stage}

或使用短语法

 Environment:
    Variables:
      DUB_CROSS_ACCOUNT_IAM_ROLE: !FindInMap [ DomainResourceMapping, DUBCrossAccountIAMRole, !Ref Stage