问题
I'm trying to create a Lambda function that will be triggered by any change made to any bucket in the S3 console. Is there a way to tie all create events from every bucket in S3 to my Lambda function?
It appears that in the creation of a Lambda function, you can only select one S3 bucket. Is there a way to do this programmatically, if not in the Lambda console?
回答1:
There is at least one way: you can setup an s3 event notifications, for each bucket you want to monitor, all pointing to a single SQS queue.
That SQS queue can then be the event source for your lambda function.
回答2:
If you are using any aws-sdk to upload to s3 there is a workaround by setting up an API gateway endpoint to trigger lambda whenever the upload to s3 succeeded. passing the bucket-name & object-key to lambda you may also specify the dest bucket dynamically.
This also will be helpful with nested prefixes. e.g. bucket/users/avatars/user1.jpg bucket/users/avatars/thumbnails/user1-thumb.jpg
回答3:
Yes you can, assume that you only want to trigger Lambda if there're new created objects in a few buckets, you can do it via AWS Console, cli, boto3 & other SDK.
If over time there're new bucket created & you also want to add it as event source for Lambda, you can create a Cloudtrail API event source to trigger another Lambda to programmaticallyy dd these new buckets as event sources for the original Lambda.
来源：https://stackoverflow.com/questions/54556599/is-there-a-way-for-a-lambda-function-to-be-triggered-by-multiple-s3-buckets