I have created a Fargate backed EKS cluster and deployed an application listening to 9090. Remember I am using a label "worker: fargate" so that my apps are created in fagrate nodes and not on EKS worker nodes.

I have made sure the application is listening to ::9090 and respond well when performing with a curl localhost 9090

I then created a service of type loadbalancer with the below definition:

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apiVersion: v1
kind: Service
metadata:
  name: mytestapp
spec:
  type: LoadBalancer
  selector:
    app: mytestapp
    worker: fargate
  ports:
    - protocol: TCP
      port: 9090
      targetPort: 9090

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I can see this has created a classic load balancer, under listener I see 9090 port and a random Nodeport.

The Loadbalancer backend health state shows "Outofservice" and telnet to the LB endpoint and port 9090 does not work.

I am confused what is wrong here. Note that I have opened security groups both inbound and outbound as well in the custer.