使用AWS CloudFormation设置S3存储桶级事件

问题描述

我正在尝试让AWS CloudFormation创建一个模板，该模板将允许我将事件附加到现有的S3存储桶，每当将新文件放入存储桶中的特定目录时，该事件就会触发Lambda函数。我使用以下YAML作为CloudFormation模板的基础，但无法使其正常工作。

I am trying to get AWS CloudFormation to create a template that will allow me to attach an event to an existing S3 Bucket that will trigger a Lambda Function whenever a new file is put into a specific directory within the bucket. I am using the following YAML as a base for the CloudFormation template but cannot get it working.

---
AWSTemplateFormatVersion: '2010-09-09'
Resources:
  SETRULE:
    Type: AWS::S3::Bucket
      Properties:
        BucketName: bucket-name
        NotificationConfiguration:
          LambdaConfigurations:
            - Event: s3:ObjectCreated:Put
              Filter:
                S3Key:
                  Rules:
                    - Name: prefix
                      Value: directory/in/bucket
              Function: arn:aws:lambda:us-east-1:XXXXXXXXXX:function:lambda-function-trigger
              Input: '{ CONFIGS_INPUT }'

我尝试用多种方法重写此模板，但均未成功。

I have tried rewriting this template a number of different ways to no success.

推荐答案

您可以编写一个自定义资源来执行此操作，实际上这就是我最终在工作中要做的 同样的问题。在最简单的级别上，定义一个需要放置存储桶通知配置的lambda，然后仅使用传递的数据调用放置存储桶通知api。

You could write a custom resource to do this, in fact that's what I've ended up doing at work for the same problem. At the simplest level, define a lambda that takes a put bucket notification configuration and then just calls the put bucket notification api with the data that was passed it.

如果需要为了能够跨不同的cloudformation模板控制不同的通知，那么它要复杂一些。您的自定义资源lambda将需要从S3中读取现有通知，然后根据从CF传递给它的数据来更新这些通知。

If you want to be able to control different notifications across different cloudformation templates, then it's a bit more complex. Your custom resource lambda will need to read the existing notifications from S3 and then update these based on what data was passed to it from CF.

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