Question

A developer manages a Lambda function invoked directly by an SDK client using an alias named 'live'. The team wants to gradually validate a new version (version 8) by sending exactly 15% of invocations to it while the remaining 85% continue hitting the current stable version (version 7), without deploying any additional infrastructure or CodeDeploy configuration. How should the developer configure the 'live' alias to achieve this?

Accepted Answer

Point the 'live' alias to version 7 and add an additional version weight assigning 0.15 to version 8 using routing configuration.

Answer

Create two separate aliases, one for version 7 and one for version 8, and let clients randomly choose which alias to invoke.

Answer

Point the 'live' alias to $LATEST and rely on Lambda to automatically split traffic between the two most recent versions.

Answer

Configure provisioned concurrency on version 8 so that 15% of requests are routed to it before the rest fall back to version 7.