amazon-web-services - 如何将 Lambda 响应数据引用到 CloudFormation 中的输出

Question

是否可以将 Lambda response_data 或 return 或任何其他变量值引用到 CloudFormation 输出中？这样我就可以导出输出以用作跨堆栈引用。

Resources:
  EC2CustomResource:
    Type: Custom::EC2CustomResource
    Properties:
      ServiceToken: !GetAtt AWSLambdaFunction.Arn
        
  AWSLambdaFunction:
     Type: AWS::Lambda::Function
     Properties:
       Description: "bucket!"
       FunctionName: !Sub '${AWS::StackName}-${AWS::Region}-lambda'
       Handler: index.handler
       Timeout: 360
       Runtime: python3.9
       Code:
         ZipFile: |
           import boto3
           import cfnresponse   
           
           def handler(event, context):
           
               response_data = {}
               s3 = boto3.client('s3')
               
               # dummy test
               testList = [1, 2, 3]
               
               try:
                   print("Execution succesfull!")
                   response_data['testList'] = testList
                   cfnresponse.send(event, context, cfnresponse.SUCCESS, response_data)
               except Exception as e:
                   print("Execution failed...")
                   response_data['Data'] = str(e)
                   cfnresponse.send(event, context, cfnresponse.FAILED, response_data)

# This is not working
Outputs:
  LambdaFunctionOutput: 
    Value: !GetAtt AWSLambdaFunction.response_data['testList']
    Description: Return Value of Lambda Function

Answer 1

您指定的模板仅创建 Lambda 函数。它不会执行这个 lambda 函数。如果您想执行 lambda 函数并引用某些返回值，则必须使用 custom resource由 lambda 函数支持。

编辑#1

可以使用 cfn !GetAtt 函数检索您使用 cfnresponse 库定义和传递的响应数据，如 the documentation 中所述。 .

Data: Optional. The custom resource provider-defined name-value pairs to send with the response. You can access the values provided here by name in the template with Fn::GetAtt.