Copy files between two S3 buckets belonging to two different acconts

Serverless Architectures
#1

Hi All,

I have some experience with AWS S3 and lambdas but I was always working within one AWS account.

Now I want to copy a file (up to 2GB) from one S3 bucket belonging to AWS account A into other S3 bucket belonging to AWS account B. Account A is a partner account to which I have API access via accessKey and secret access key. Account B is my organization’s account to which I have admin rights.

Can I copy the file directly to my bucket? I mean without downloading the file to lambda instance and then uploading to my S3 bucket?

#2

The S3 copyObject method seems to support copying across buckets. Have you tried using it? If the role the Lambda uses for execution has access to both buckets I don’t think it would matter if they were owned by different accounts.

https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#copyObject-property