amazon-web-services - 在 SAM 模板中使用 !If 内部函数

Question

我认为您可以使用 SAM 对状态机执行类似的操作:

SM:
    Type: AWS::Serverless::StateMachine
    Properties:
      Name: !Sub "${StageName}-State-Machine"
      DefinitionUri: statemachine/dddd.asl.json
      Events:
        Schedule:
          !If
            - IsPrimaryRegion
            -
              Type: Schedule
              Properties:
                Description: Schedule to run the twilio number state machine
                Enabled: !Ref ScheduleEnabled
                Schedule: "rate(1 hour)"
            - 
              Type: Schedule
              Properties:
                Description: Schedule to run the twilio number state machine
                Enabled: !Ref ScheduleEnabled
                Schedule: "rate(1 hour)"

但是 SAM 验证失败。如果我在属性中使用 State 而不是 Enabled，它也会失败。最终我希望有一种方法可以使用参数或任何其他方式动态设置启用。但状态验证失败。

也尝试过这个:

Enabled: !If [IsPrimaryRegion, true, false]

Answer 1

您需要定义Conditions block ，然后您可以在模板中使用这些条件，如下所示:

Parameters:
  PrimaryRegion:
    Type: String
    Description: Primary region

Conditions:
  IsPrimaryRegion: !Equals [ !Ref PrimaryRegion, !Ref "AWS::Region" ]

Resources:
  SM:
    Type: AWS::Serverless::StateMachine
      Properties:
        Name: !Sub "${StageName}-State-Machine"
        DefinitionUri: statemachine/dddd.asl.json
        Events:
          Schedule:
            Type: Schedule
            Properties:
              Description: Schedule to run the twilio number state machine
              Enabled: !If [ IsPrimaryRegion, true, false ]
              Schedule: "rate(1 hour)"

最终:

Parameters:
  PrimaryRegion:
    Type: String
    Description: Primary region

Conditions:
  IsPrimaryRegion: !Equals [ !Ref PrimaryRegion, !Ref "AWS::Region" ]
  IsNotPrimaryRegion: !Not [ !Equals [ !Ref PrimaryRegion, !Ref "AWS::Region" ] ]

Resources:
  SMPrimary:
    Type: AWS::Serverless::StateMachine
      Condition: IsPrimaryRegion
      Properties:
        Name: !Sub "${StageName}-State-Machine"
        ...
              Enabled: true
  SM:
    Type: AWS::Serverless::StateMachine
      Condition: IsNotPrimaryRegion
      Properties:
        Name: !Sub "${StageName}-State-Machine"
        ...
              Enabled: false