aws-cloudformation - 每个 DependsOn 值必须是字符串 - 如何分解 DependsOn 属性的映射

Question

我正在使用explode transform宏按以下方式进行。

  ServiceMap:
    Private:
      Prefix: Private
    Public:
      Prefix: Public

  Service:
    ExplodeMap: ServiceMap
    Type: AWS::ECS::Service
    DependsOn:
      - !Sub 'LoadBalancerRule${!Explode Prefix}'
    Properties:
      Cluster: !Ref "ECSCluster"
      ...
      TaskDefinition: !Ref TaskDefinition!Explode Prefix
      LoadBalancers:
        - ContainerName: !Sub '!Explode Prefix${ServiceName}'
          ContainerPort: !Ref "ContainerPort"
          TargetGroupArn: !Ref TargetGroup!Explode Prefix

  LoadBalancerRule:
    ExplodeMap: ServiceMap
    Type: AWS::ElasticLoadBalancingV2::ListenerRule
    Properties:
      Actions:
      ...
      ListenerArn: !Ref "LoadBalancerListener"
      Priority: !Ref "Priority"

这似乎是成功的，但对于 DependsOn 属性中指定的转换。当我创建堆栈时，这是我收到的错误:

Template format error: Every DependsOn value must be a string.

问题:- 我不知道如何实际查看转换后的模板- 为什么会发生这种情况？根据文档，!Sub创建一个字符串

有什么想法

Answer 1

不太确定 !Sub 'LoadBalancerRule${!Explode Prefix}' 和 - LoadBalancerRule!Explode Prefix 之间有什么区别，但这解决了

  Service:
    ExplodeMap: ServiceMap
    Type: AWS::ECS::Service
    DependsOn:
      - LoadBalancerRule!Explode Prefix
    Properties:
      Cluster: !Ref "ECSCluster"
      ...
      TaskDefinition: !Ref TaskDefinition!Explode Prefix
      LoadBalancers:
        - ContainerName: !Sub '!Explode Prefix${ServiceName}'
          ContainerPort: !Ref "ContainerPort"
          TargetGroupArn: !Ref TargetGroup!Explode Prefix