Can AWS Lambda access S3 buckets from other regions?

Question

I currently try to use AWS Lambda. The lambda function should load the zip file (> 10 MB) from an S3 Bucket. The S3 bucket is located in eu-central-1 while the lambda function is in lambda:us-east-1.

When I try to save the lambda function, I get:

Error occurred while GetObject. S3 Error Code: AuthorizationHeaderMalformed. S3 Error Message: The authorization header is malformed; the region 'us-east-1' is wrong; expecting 'eu-central-1'

Is that really the problem? Is it possible to move the lambda function?

The IAM role which executes the Lambda function has the AmazonS3FullAccess policy.

Answer 1

The lambda function has to be in the same region as the S3 bucket you specify at "S3 link URL*":

Answer 2

You can access an S3 bucket in a different region from Lambda. If you are using Python boto3 library, the following code will help you:

import boto3

client = boto3.client('s3', region_name='eu-central-1')

In fact you can access any resource in a different region from AWS Lambda.