创建 CloudFront 分配时出现隐秘的 CloudFormation 失败

如何解决创建 CloudFront 分配时出现隐秘的 CloudFormation 失败

我设置了一个 CloudFormation 模板来跟踪 CloudFront 分配等。完成此设置后，我创建了一个 AWS::CertificateManager::Certificate 和一个 AWS::CloudFront::distribution 资源，其中 CDN 仅从非网站 S3 源提供服务。

当我运行变更集时，我得到了这个难以置信的模糊失败。

“操作 'AWS::CloudFront::distribution' 的访问被拒绝。”有点失去我在这里。一方面，我不清楚这应该是什么操作。最重要的是，此后的堆栈回滚是不完整的。 CloudFormation 事件甚至没有显示删除 CDN 或证书的尝试，并且当我尝试从浏览器点击 CloudFront URL 时，它完美无缺，所以我什至不确定我的模板在这里尝试做什么失败的。事实上，这对我来说是一个问题的唯一原因是不完整的回滚试图将堆栈中的 lambdas 恢复到 nodejs8.10，这会导致更大的失败。如果这不是问题，我不知道我会感受到这个模糊错误的影响。

模板，基于几年前的静态站点示例：

AWstemplateFormatVersion: 2010-09-09
Transform:
- AWS::Serverless-2016-10-31
- AWS::CodeStar

Parameters:
  ProjectId:
    Type: String
    Description: AWS CodeStar projectID used to associate new resources to team members
  CodeDeployRole:
    Type: String
    Description: IAM role to allow AWS CodeDeploy to manage deployment of AWS Lambda functions
  Stage:
    Type: String
    Description: The name for a project pipeline stage,such as Staging or Prod,for which resources are provisioned and deployed.
    Default: ''

Globals:
  Api:
    BinaryMediaTypes:
      - image~1png
  Function:
    Runtime: nodejs14.x
    AutopublishAlias: live
    DeploymentPreference:
      Enabled: true
      Type: Canary10Percent5Minutes
      Role: !Ref CodeDeployRole

Resources:

  MahCert:
    Type: AWS::CertificateManager::Certificate
    Properties:
      DomainName: domain.com
      DomainValidationoptions:
        - DomainName: domain.com
          HostedZoneId: Z2GZX5ZQI1HO5L
      SubjectAlternativeNames:
        - '*.domain.com'
      CertificateTransparencyLoggingPreference: ENABLED
      ValidationMethod: DNS

  CloudFrontCDN:
    Type: AWS::CloudFront::distribution
    Properties:
      distributionConfig:
        Comment: Source for all static resources
        PriceClass: PriceClass_100
        Aliases:
          - domain.com
        ViewerCertificate:
          AcmCertificateArn: !Ref MahCert
          MinimumProtocolVersion: TLSv1.2_2021
          SslSupportMethod: sni-only
        DefaultRootObject: index.html
        DefaultCacheBehavior:
          ViewerProtocolPolicy: redirect-to-https
          CachePolicyId: b2884449-e4de-46a7-ac36-70bc7f1ddd6d
          TargetoriginId: SiteBucket
        Enabled: True
        Origins:
          - DomainName: <my_bucket>.s3.amazonaws.com
            Id: SiteBucket
            S3OriginConfig:
              OriginAccessIdentity: ''

  ServerlessRestApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: Prod
      DeFinitionBody:
        swagger: 2.0
        info:
          title: Static resource proxy

        paths:
          /static/{proxy+}:
            get:
              x-amazon-apigateway-integration:
                httpMethod: ANY
                type: http_proxy
                uri: <my_bucket>.s3.amazonaws.com/static/{proxy}
              responses: {}

  GetHelloWorld:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.get
      Role:
        Fn::GetAtt:
        - LambdaExecutionRole
        - Arn
      Events:
        GetEvent:
          Type: Api
          Properties:
            Path: /
            Method: get
        ProxyEvent:
          Type: Api
          Properties:
            Path: /{proxy+}
            Method: any
            
  GetStaticContent:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.getResource
      Role:
        Fn::GetAtt:
        - LambdaExecutionRole
        - Arn
      Events:
        GetResourceEvent:
          Type: Api
          Properties:
            Path: /static/{folder}/{file}
            Method: get
            
  GetQuote:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.getQuote
      Role:
        Fn::GetAtt:
        - LambdaDynamoDBReadRole
        - Arn
      Events:
        GetRandomQuoteEvent:
          Type: Api
          Properties:
            Path: /getquote
            Method: get
        GetQuoteEvent:
          Type: Api
          Properties:
            Path: /getquote/{id}
            Method: get
            
  LambdaExecutionRole:
    Description: Creating service role in IAM for AWS Lambda
    Type: AWS::IAM::Role
    Properties:
      RoleName: !Sub 'CodeStar-${ProjectId}-Execution${Stage}'
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service: [lambda.amazonaws.com]
          Action: sts:AssumeRole
      Path: /
      ManagedPolicyArns:
        - !Sub 'arn:${AWS::Partition}:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'
      PermissionsBoundary: !Sub 'arn:${AWS::Partition}:iam::${AWS::AccountId}:policy/CodeStar_${ProjectId}_PermissionsBoundary'
      
  LambdaDynamoDBReadRole:
    Description: Creating service role in IAM for AWS Lambda
    Type: AWS::IAM::Role
    Properties:
      RoleName: !Sub '${ProjectId}-DynamoDB-Read'
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service: [lambda.amazonaws.com]
          Action: sts:AssumeRole
      Path: /
      Policies:
        -
          PolicyName: "dynamodb-read-quotes"
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              -
                Effect: "Allow"
                Action:
                  - "dynamodb:GetItem"
                  - "dynamodb:DescribeTable"
                Resource: "<dynamo_arn>"
      ManagedPolicyArns:
        - !Sub 'arn:${AWS::Partition}:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'

注意 - domain.com 不是我在这里使用的实际域。

更新：

我完全删除了堆栈并从这个模板重新创建它，认为堆栈的历史有问题。但是，我遇到了同样的错误。

堆栈使用的 IAM 角色具有这些权限

实际上，即使授予此角色对 CloudFront 资源的完全写入权限，问题仍然存在。

解决方法

基于聊天讨论。

发现问题的原因是缺少用于部署堆栈的 IAM 角色的IAM 权限。具体来说，缺少的权限是：

• cloudfront:GetDistribution - 授予获取网络分发信息的权限

向角色添加该权限，解决了问题。

为了查找缺失的权限，使用了 CloudTrial 的事件历史记录。