Which solution will meet this requirement MOST cost-effectively?
Use the AWS Load Balancer Controller to provision a Network Load Balancer.
Use the AWS Load Balancer Controller to provision an Application Load Balancer.
Use an AWS Lambda function to connect the requests to Amazon EKS.
Use Amazon API Gateway to connect the requests to Amazon EKS.
Explanations:
The AWS Load Balancer Controller provisioning a Network Load Balancer is more suitable for managing TCP/UDP traffic, not HTTP/HTTPS traffic typically used for routing to microservices.
The AWS Load Balancer Controller can provision an Application Load Balancer (ALB), which is ideal for HTTP/HTTPS traffic and can route requests to different microservices based on URL paths, making it cost-effective and suitable for this use case.
Using AWS Lambda to route requests to EKS would introduce unnecessary complexity, as Lambda is not designed for direct routing of HTTP requests to microservices in Kubernetes.
API Gateway is typically used for serverless architectures or RESTful APIs. While it can route traffic to EKS, it is not the most cost-effective solution for managing microservices within a Kubernetes cluster, as it adds additional overhead.
I surmise that the answer is:
Use the AWS Load Balancer Controller to provision an Application Load Balancer.