This example shows how to use a load balancer in a different stack to load balance to an ECS service.

You must either create an ApplicationListener in the same stack as your ECS service, or create an empty TargetGroup in your load balancer stack and register your ECS service into that.

This example demoes both of these possibilities. It uses Fargate, but the same principles hold for EC2 services.

(A third option, not pictured here, is to create the shared listener with a fixed response and add a new listener rule in the service stack).

Shown in split-at-listener.ts, create an ApplicationLoadBalancer in a shared stack, and an ApplicationListener in the service stack.

Shown in split-at-targetgroup.ts, create an empty TargetGroup in the load balancer stack, and register a Service into it in the service stack.