Set up the application to use an alias that points to the current version. Deploy the new version of the code and configure the alias to send 10% of the users to this new version. If the deployment goes wrong, reset the alias to point all traffic to the current version

Set up the application to directly deploy the new Lambda version. If the deployment goes wrong, reset the application back to the current version using the version number in the ARN

Set up the application to use an alias that points to the current version. Deploy the new version of the code and configure alias to send all users to this new version. If the deployment goes wrong, reset the alias to point to the current version

Set up the application to have multiple alias of the Lambda function. Deploy the new version of the code. Configure a new alias that points to the current alias of the Lambda function for handling 10% of the traffic. If the deployment goes wrong, reset the new alias to point all traffic to the most recent working alias of the Lambda function