Which solution will meet these requirements?
Configure a weighted routing policy in Amazon Route 53. Associate the versions of the Lambda function with the weighted routing policy.
Create a function alias. Configure the alias to split the traffic between the two versions of the Lambda function.
Create an Application Load Balancer (ALB) that uses the Lambda function as a target. Configure the ALB to split the traffic between the two versions of the Lambda function.
Create the new version of the Lambda function as a Lambda layer on the existing version. Configure the function to split the traffic between the two layers.
Explanations:
Amazon Route 53 is primarily used for DNS management and traffic routing to different resources; it does not directly support traffic splitting between Lambda function versions.
Creating a function alias in AWS Lambda allows for traffic splitting between different versions of the function. You can specify a percentage of traffic to be directed to each version using the alias configuration.
While an Application Load Balancer (ALB) can route traffic to different targets, it is not designed to manage traffic directly between different versions of a Lambda function. ALBs are typically used for HTTP/HTTPS traffic routing among EC2 instances or containers, not Lambda function versions.
Lambda layers are used to share code and dependencies across different Lambda functions but do not facilitate traffic splitting between versions of a single Lambda function. This option does not address the requirement of traffic management between function versions.
I gauge that the answer is:
Create a function alias. Configure the alias to split the traffic between the two versions of the Lambda function.