Target groups in AWS for Network Load Balancers

Question

Network Load Balancer listens on port 80 and forwards traffic to the target group. My autoscaling group is configured to add any new targets to this target group.

However, my application on the target EC2 instances runs on port 8001, not 80.

So my targets should register under port 8001 in the target group. All new instances created by auto scaling are added as targets with port 80 and there is no way to auto specify which port that should be used instead (8001 for me).

Any ideas how to make this work?

Answer 1

Ypu can change the port definition in the target group  for the port definition you're looking for. 

The port in the target group is the port on which the targets receive traffic. The port on the listener is the port on which the load balancer listens for requests.

So you should set port 80 on the listener and port 8001 on the target group.

You may have to recreate the target group for that. I don't see a way to modify the target port without recreating it.

If you are still unclear, joining the AWS certification program today is recommended.