无服务器框架 - 创建 Lambda 和 S3 并在 S3 中上传文件。然后，使用 Lambda 提取到 DynamoDB

Question

这是我第一次使用无服务器框架，我的任务是使用无服务器创建一个 lambda、s3 和 dynamodb，然后调用 lambda 从 s3 传输到 dynamo。我正在尝试将无服务器生成的名称获取到我的 S3 以在我的 Lambda 中使用它，但我没有运气。这就是我的 serveless.yml 的样子：

service: fetch-file-and-store-in-s3

frameworkVersion: ">=1.1.0"

custom:
  bucket: 
    Ref: Outputs.AttachmentsBucketName

provider:
  name: aws
  runtime: nodejs12.x
  stage: dev
  region: us-east-1
  iamRoleStatements:
    - Effect: Allow
      Action:
        - s3:PutObject
        - s3:PutObjectAcl
      Resource: "arn:aws:s3:::${self:custom.bucket.Ref}/*"

functions:
  save:
    handler: handler.save
    environment:
      BUCKET: ${self:custom.bucket.Ref}

resources:
  # S3
  AttachmentsBucket:
  Type: AWS::S3::Bucket
  Properties:
    # Set the CORS policy
    CorsConfiguration:
      CorsRules:
        -
          AllowedOrigins:
            - '*'
          AllowedHeaders:
            - '*'
          AllowedMethods:
            - GET
            - PUT
            - POST
            - DELETE
            - HEAD
          MaxAge: 3000

  # Print out the name of the bucket that is created
  Outputs:
    AttachmentsBucketName:
      Value:
        Ref: AttachmentsBucket

这是它创建 s3 存储桶的部分

Resources:
    # S3
    AttachmentsBucket:
      Type: AWS::S3::Bucket
      Properties:
        # Set the CORS policy
        CorsConfiguration:
          CorsRules:
            - AllowedOrigins:
                - '*'
            - AllowedHeaders:
                - '*'
            - AllowedMethods:
                - GET
                - PUT
                - POST
                - DELETE
                - HEAD
            - MaxAge: 3000
  # Print out the name of the bucket that is created
  Outputs:
    AttachmentsBucketName:
      Value:
        Ref: AttachmentsBucket

这是我目前收到的错误：

λ sls deploy
Serverless: Packaging service...
Serverless: Excluding development dependencies...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading artifacts...
Serverless: Uploading service fetch-file-and-store-in-s3.zip file to S3 (7.32 MB)...
Serverless: Validating template...

  Error --------------------------------------------------

  Error: The CloudFormation template is invalid: Invalid template property or properties [AttachmentsBucket, Type, Properties]

Answer 1

您遇到了一些缩进问题：

resources:
  Resources:
    # S3
    AttachmentsBucket:
      Type: AWS::S3::Bucket
      Properties:
        # Set the CORS policy
        CorsConfiguration:
          CorsRules:
            - AllowedOrigins:
                - '*'
            - AllowedHeaders:
                - '*'
            - AllowedMethods:
                - GET
                - PUT
                - POST
                - DELETE
                - HEAD
            - MaxAge: 3000
  # Print out the name of the bucket that is created
  Outputs:
    AttachmentsBucketName:
      Value:
        Ref: AttachmentsBucket

Answer 2

缩进对于 serverless.yml 文件很重要。在这种情况下，AttachmentsBucket 是一种资源，它应该是 Resources 下的子部分，有一个选项卡 space，然后 Type 和 Properties 应该有一个选项卡 spaces 来自资源名称：AttachmentsBucket，而在提供的示例中实际上有两个。 CloudFormation 将无法处理此特定资源，因为它无法识别具有正确名称和属性的资源。

查看更新后的示例：

Resources:
  AttachmentsBucket:
    Type: AWS::S3::Bucket
    Properties:
    # Set the CORS policy
    CorsConfiguration:
      CorsRules:
        - AllowedOrigins:
            - '*'
        - AllowedHeaders:
            - '*'
        - AllowedMethods:
            - GET
            - PUT
            - POST
            - DELETE
            - HEAD
        - MaxAge: 3000

# Print out the name of the bucket that is created
Outputs:
  AttachmentsBucketName:
    Value: !Ref AttachmentsBucket

Answer 3

您可以使用 aws cli 工具验证 cloudformation 模板 here

但是您的问题是关于如何使 lambda 和 dynamodb 加载工作的，并且在您的描述中您询问的是部署部分。你能更新你的问题和标签吗？

Answer 4

我找到了解决办法。因为我很新，而且这是我的第一个项目，所以一开始我对这些术语不是很熟悉。我所做的就是在这里命名我的桶：

Resources:
  Bucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: ${self:custom.bucket} # Getting the name of table I defined under custom in serverless.yml
  # Make Bucket publicly accessable
  MyBucketPolicy:
    Type: AWS::S3::BucketPolicy
    Properties:
        Bucket: !Ref Bucket
        PolicyDocument:
          Statement:
            - Effect: Allow
              Principal: '*' # public access to access the bucket files 
              Action: s3:GetObject
              Resource: 'arn:aws:s3:::${self:custom.bucket}/*'

然后为了使用部署上传文件，我找到了一个名为 serverless-s3bucket-sync 的插件并在自定义属性中添加我的文件在文件夹下的位置：

custom:
  bucket: mybucketuniquename #unique global name it will create for the bucket
  s3-sync: 
      - folder: images
        bucket: ${self:custom.bucket}

并添加了 IamRole：

iamRoleStatements:
    #S3 Permissions
    - Effect: Allow
      Action:
        - s3:*
      Resource: "arn:aws:s3:::${self:custom.bucket}"

无服务器框架 - 创建 Lambda 和 S3 并在 S3 中上传文件。然后，使用 Lambda 提取到 DynamoDB

Serverless Framework - Create a Lambda and S3 and upload a file in S3. Then, extract to DynamoDB with Lambda

amazon-s3

aws-lambda

serverless-framework