Launch Lambda function from Step function in different region

Question

Is it possible to launch AWS Lambda in eu-west-1 region from Step function in af-south-1.

I am getting ResourceNotFound exception, but I am not sure I am missing some permissions, or it is not possible at all.

Accepted Answer

You're getting `ResourceNotFound` because Step Function is calling the Lambda endpoint in `af-south-1` to invoke the Lambda function; but it isn't there (it's in `eu-west-1).

One way to solve this is to have a Lambda function in `af-south-1` that is called by the Step Function and the only job of that Lambda function is to invoke the Lambda function in `eu-west-1`. However, having a Lambda function synchronously call another Lambda function is considered an anti-pattern: https://docs.aws.amazon.com/lambda/latest/operatorguide/functions-calling-functions.html

Answer

Hi,

Yes, it is possible.

Have a detailled read of this blog post to have all the proper setup for such a use case: https://aws.amazon.com/blogs/compute/introducing-cross-account-access-capabilities-for-aws-step-functions/

Best,

Didier

Launch Lambda function from Step function in different region

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