如何统计CloudFormation模板生成的资源数量？

Question

我正在使用 Cloudformation 和 aws-sam。在构建/部署应用程序时，有什么方法可以计算正在创建的资源数量吗？举个例子，我有一个遵循无服务器架构的 REST API 项目，它在

Resources

元素下只有 193 个函数。但这实际上产生了583个资源。我也知道了这一点，因为它达到了 aws 堆栈资源限制并且 AWS 显示了一条错误消息。

因此我想知道是否有一种方法可以知道正在创建的实际资源的数量。

以下是我制作的示例模板。

模板.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  aws-restapi

  Sample SAM Template for aws-restapi
  
# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Timeout: 5
    VpcConfig:
        SecurityGroupIds:
          - sg-041f2xxxd921e8e
        SubnetIds:
          - subnet-03xxxb2d
          - subnet-c4dxxxcb

Resources:

  GetAllAccountingTypesFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      CodeUri: aws-restapi/
      Handler: source/accounting-types/accountingtypes-getall.getallaccountingtypes
      Runtime: nodejs14.x
      Events:
        GetAllAccountingTypesAPIEvent:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            Path: /accountingtypes/getall
            Method: get
            RestApiId:
              Ref: ApiGatewayApi

  GetAccountingTypeByIDFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      CodeUri: aws-restapi/
      Handler: source/accounting-types/accountingtypes-byid.getbyid
      Runtime: nodejs14.x
      Events:
        GetAllAccountingTypesAPIEvent:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            Path: /accountingtypes/getbyid
            Method: get
            RestApiId:
              Ref: ApiGatewayApi
  

  LambdaRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - lambda.amazonaws.com
            Action:
              - 'sts:AssumeRole'
      Path: /
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
      Policies:
        - PolicyName: root
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: Allow
                Action:
                  - ec2:DescribeNetworkInterfaces
                  - ec2:CreateNetworkInterface
                  - ec2:DeleteNetworkInterface
                  - ec2:DescribeInstances
                  - ec2:AttachNetworkInterface
                Resource: '*'

Outputs:
  HelloWorldApi:
    Description: "API Gateway endpoint URL for Prod stage for functions"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/"

Answer 1

您可以使用 sam CLI 通过

sam validate --debug --template yourtempatefile.yaml

转换模板。转换后的模板将与其他调试消息一起输出到 stderr。 这个 bash oneliner 可以帮助我计算资源。

$ sam validate --debug --template mytemplate.yaml 2>&1 | egrep '^    Properties:'  | wc -l

Answer 2

据我所知，但可能对您有帮助的是这个SAM无服务器函数参考，它告诉您在未指定某些属性时将隐式生成哪些资源。

考虑到这一点，您可以计算实际创建的资源量。

Answer 3

我也为此苦苦挣扎。我通过转到 CloudFormation -> 资源来“计算”它们

不是最好的，但它可以完成工作😃