Question

我有一个cloudformation模板，用于创建Table以及EventSourceMapping for Stream。我在表创建中使用条件，但是它抱怨EventSourceMapping的依赖性，因为我的EventSourceMapping依赖于表创建。我想要一些有关如何管理依赖项的建议。这是我的示例代码：

参数：表名：说明：DynamoDb表的名称类型：字符串

条件： TableCreationCondition：！等于[！Ref TableName，“”]

资源：

 DynamoDBTable:
    #Condition: TableCreationCondition
    Type: "AWS::DynamoDB::Table"
    DeletionPolicy: Retain
    Properties:
      AttributeDefinitions:
      - AttributeName: !Ref HashKeyElementName
        AttributeType: !Ref HashKeyElementType
      KeySchema:
      - AttributeName: !Ref HashKeyElementName
        KeyType: HASH
      TableName: !Ref TableName
      StreamSpecification:
        StreamViewType: NEW_AND_OLD_IMAGES
      ProvisionedThroughput:
        ReadCapacityUnits: !Ref ReadCapacityUnits
        WriteCapacityUnits: !Ref WriteCapacityUnits
      SSESpecification:
          SSEEnabled: true

  DynamoDBTableStream:
    Type: AWS::Lambda::EventSourceMapping
    Properties:
      BatchSize: 1 #trigger one lambda per document
      Enabled: True
      EventSourceArn: 
        Fn::GetAtt:
          - DynamoDBTable
          - StreamArn 
      FunctionName: 
        Fn::GetAtt: 
          - MyLambdaFunction
          - Arn 
      StartingPosition: LATEST

Answer 1

您可以在DynamoDB表上设置此属性：

DependsOn: !Ref DynamoDBTableStream

在AWS Cloudformation模板中使用条件时如何管理资源依赖性？

1 个答案: