我正在遵循无服务器教程，我试图在每次将图像上传到s3 bucket时发送通知。我在函数下创建了一个sendUploadNotifications函数，而不是在函数中添加事件，我在AttachmentsBucket下设置了"NotificationsConfiguration"，并在资源下创建了一个新的sendUploadNotificationsPermission资源。
但是当我部署应用程序时，当我尝试部署我的无服务器应用程序时，我得到以下错误:
错误:CloudFormation模板无效:模板错误:Fn实例::GetAtt引用未定义资源senduploadnotificationslambdfunction
Error似乎源于我在sendUploadNotificationsPermission资源下引用FunctionName的方式。
我尝试了引用函数名的不同方法，但无济于事。我仍然得到相同的错误
我的serverless.yml文件
service: serverless-udagram2
frameworkVersion: '2'
provider:
name: aws
runtime: nodejs12.x
lambdaHashingVersion: 20201221
stage: ${opt:stage, 'dev'}
region: ${opt:region, 'ap-southeast-1'}
environment:
GROUPS_TABLE: groups-${self:provider.stage}
IMAGES_TABLE: images-${self:provider.stage}
IMAGE_ID_INDEX: ImageIdIndex
IMAGES_S3_BUCKET: branded-serverless-udagram-images-${self:provider.stage}
SIGNED_URL_EXPIRATION: 300
iamRoleStatements:
- Effect: Allow
Action:
- dynamodb:Scan
- dynamodb:PutItem
- dynamodb:GetItem
- dynamodb:Query
Resource: arn:aws:dynamodb:${self:provider.region}:*:table/${self:provider.environment.GROUPS_TABLE}
- Effect: Allow
Action:
- dynamodb:PutItem
- dynamodb:Query
Resource: arn:aws:dynamodb:${self:provider.region}:*:table/${self:provider.environment.IMAGES_TABLE}
- Effect: Allow
Action:
- dynamodb:Query
- dynamodb:PutItem
Resource: arn:aws:dynamodb:${self:provider.region}:*:table/${self:provider.environment.IMAGES_TABLE}/index/${self:provider.environment.IMAGE_ID_INDEX}
- Effect: Allow
Action:
- s3:PutObject
- s3:GetObject
Resource: arn:aws:s3:::${self:provider.environment.IMAGES_S3_BUCKET}/*
functions:
getGroups:
handler: src/lambda/http/getGroups.handler
events:
- http:
path: groups
method: get
cors: true
createGroup:
handler: src/lambda/http/createGroup.handler
events:
- http:
path: groups
method: post
cors: true
request:
schema:
application/json: ${file(models/create-group-request.json)}
getImages:
handler: src/lambda/http/getImages.handler
events:
- http:
path: groups/{groupId}/images
method: get
cors: true
getImage:
handler: src/lambda/http/getImage.handler
events:
- http:
path: images/{imageId}
method: get
cors: true
createImage:
handler: src/lambda/http/createImage.handler
events:
- http:
path: groups/{groupId}/images
method: post
cors: true
request:
schema:
application/json: ${file(models/create-image-request.json)}
sendUploadNotifications:
handler: src/lambda/s3/sendNotifications.handler
resources:
Resources:
# API gateway validates the request in accordance with json schemas that are identified in the function section under schema
RequestBodyValidator:
Type: AWS::ApiGateway::RequestValidator
Properties:
Name: 'request-body-validator'
RestApiId:
Ref: ApiGatewayRestApi
ValidateRequestBody: true
ValidateRequestParameters: true
GroupsDynamoDBTable:
Type: AWS::DynamoDB::Table
Properties:
AttributeDefinitions:
- AttributeName: id
AttributeType: S
KeySchema:
- AttributeName: id
KeyType: HASH
BillingMode: PAY_PER_REQUEST
TableName: ${self:provider.environment.GROUPS_TABLE}
ImagesDynamoDBTable:
Type: AWS::DynamoDB::Table
Properties:
AttributeDefinitions:
- AttributeName: groupId
AttributeType: S
- AttributeName: timestamp
AttributeType: S
- AttributeName: imageId
AttributeType: S
KeySchema:
- AttributeName: groupId
KeyType: HASH #partition key
- AttributeName: timestamp
KeyType: RANGE #sort key
GlobalSecondaryIndexes:
- IndexName: ${self:provider.environment.IMAGE_ID_INDEX}
KeySchema:
- AttributeName: imageId
KeyType: HASH
Projection:
ProjectionType: ALL
BillingMode: PAY_PER_REQUEST
TableName: ${self:provider.environment.IMAGES_TABLE}
# Bucket for file uploads
AttachmentsBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: ${self:provider.environment.IMAGES_S3_BUCKET}
NotificationConfiguration: # Sends notification when image has been uploaded
LambdaConfigurations: #
- Event: s3:ObjectCreated:*
Function: !GetAtt sendUploadNotificationsLambdaFunction.Arn
CorsConfiguration:
CorsRules:
-
AllowedOrigins:
- "*"
AllowedHeaders:
- "*"
AllowedMethods:
- 'GET'
- 'PUT'
- 'POST'
- 'DELETE'
- 'HEAD'
MaxAge: 3000
sendUploadNotificationsPermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: !GetAtt sendUploadNotificationsLambdaFunction.Arn
Action: lambda:InvokeFunction
Principal: s3.amazonaws.com
SourceAccount: !Ref AWS::AccountId #!Ref
SourceArn: arn:aws:s3:::${self:provider.environment.IMAGES_S3_BUCKET}
BucketPolicy:
Type: AWS::S3::BucketPolicy
Properties:
PolicyDocument:
Id: MyPolicy
Version: "2012-10-17"
Statement:
- Sid: PublicReadForGetBucketObjects
Effect: Allow
Principal: '*'
Action: 's3:GetObject'
Resource: 'arn:aws:s3:::${self:provider.environment.IMAGES_S3_BUCKET}/*'
Bucket:
Ref: AttachmentsBucket
我已经尝试通过将lamdfunction附加到函数名称的末尾来改变sendUploadNotificationsPermission和AttachmentsBucket中的函数名称，但仍然得到相同的错误。
如果有任何帮助，我将不胜感激。
您试图在CloudFormation部分Resource中引用模板中不存在的内容。
sendUploadNotificationsLambdaFunction
如果你想引用任何你定义的名为
的函数sendUploadNotifications
您需要在Resources部分中构造ARN。
为CloudFormation生成逻辑ID，插件在serverless中转换指定的名称。
Transform a leading character into uppercase
Transform - into Dash
Transform _ into Underscore
senduploadnotificationslambdfunction在你的例子中
有两种方法:
- 您可以在模板的
Resource部分中引用它:
sendUploadNotificationsPermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: !GetAtt SendUploadNotificationsLambdaFunction.Arn
Action: lambda:InvokeFunction
Principal: s3.amazonaws.com
SourceAccount: !Ref AWS::AccountId #!Ref
SourceArn: arn:aws:s3:::${self:provider.environment.IMAGES_S3_BUCKET}
- 使用Fn::Join构造ARN。
sendUploadNotificationsPermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: !Join [":", ['arn:aws:lambda', !Ref 'AWS::Region', !Ref AWS::AccountId, '${self:service}-${self:provider.stage}-sendUploadNotifications']]
Action: lambda:InvokeFunction
Principal: s3.amazonaws.com
SourceAccount: !Ref AWS::AccountId #!Ref
SourceArn: arn:aws:s3:::${self:provider.environment.IMAGES_S3_BUCKET}
解决了。"引用未定义的资源错误"是由以下事实引起的:Yml文件编译后，将函数名大写。
sendUploadNotifications变为senduploadnotificationslambdfunction
改变:
FunctionName: !Ref sendUploadNotificationsLambdaFunction
:
FunctionName: !Ref SendUploadNotificationsLambdaFunction
它现在部署没有问题。