Amazon s3 无服务器框架-创建Lambda和S3并在S3中上载文件。然后，用Lambda提取至DynamoDB

这是我第一次使用serverless框架，我的任务是使用serverless创建lambda、s3和dynamodb，然后调用lambda从s3传输到dynamo。 我正在尝试将serverless生成的名称添加到我的S3中，以便在Lambda中使用它，但我没有成功。 这就是我的servless.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 bucket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

这就是我目前遇到的错误：

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]

---

缩进有一些问题：

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

---

缩进对于serverless.yml文件很重要。在这种情况下，

AttachmentsBucket

是一个资源，它应该是

Resources

下的一个子部分，有一个选项卡空间，然后

Type

和

Properties

应该有一个来自资源名称的选项卡空间：

AttachmentsBucket

，而在提供的示例中它实际上有两个选项卡空间。CloudFormation将无法处理此特定资源，因为它无法使用正确的名称和属性标识资源

请参阅更新的示例：

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

---

您可以使用aws cli工具验证cloudformation模板

---

但是您的问题是如何使lambda和dynamodb负载工作，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？

我找到了解决办法。因为我是一个新手，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给我的桶命名：

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，为了上传一个带有deploy的文件，我找到了一个名为serverless-s3bucket-sync的插件 并添加到“自定义”属性和文件夹下的“我的文件”位置：

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

并添加了以下角色：

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

---

非常感谢。我的缩进实际上是这样的。。我想我在这里贴的时候把它搞砸了。我还是有同样的错误。谢谢！我的缩进是正确的。。很抱歉，是我在这里粘贴的时候把它弄糟了。我得到的错误不是来自这部分。谢谢。我能解决这个问题。我会把它寄出去