AWS NLB's target group is not taking into account node labels.

[cjose3]

What happened:
The NLB's target group is registering all nodes of the cluster.

What you expected to happen:
The NLB's target group registers ONLY those nodes with labels defined by the annotation service.beta.kubernetes.io/aws-load-balancer-target-node-labels.

How to reproduce it (as minimally and precisely as possible):
Create a service such:

apiVersion: v1
kind: Service
metadata:
  annotations:
    service.beta.kubernetes.io/aws-load-balancer-backend-protocol: tcp
    service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled: "true"
    service.beta.kubernetes.io/aws-load-balancer-proxy-protocol: '*'
    service.beta.kubernetes.io/aws-load-balancer-target-node-labels: lifecycle=Ec2Spot,intent=public-apps
    service.beta.kubernetes.io/aws-load-balancer-type: nlb
  name: ingress-svc
spec:
  externalTrafficPolicy: Cluster
  selector:
    app.kubernetes.io/name: kong
  type: LoadBalancer

On a cluster with two group of nodes. A group with labels such lifecycle=Ec2Spot,intent=public-apps and another without them.

Anything else we need to know?:
We have 10 nodes running on a private subnet with labels like:

lifecycle=Ec2Spot
intent=apps

and two nodes on public subnet with labels like:

lifecycle=Ec2Spot
intent=public-apps

We want to have as targets for the load balancer only nodes running on the public subnet.

Environment:

• Kubernetes version (use kubectl version):

Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.2", GitCommit:"092fbfbf53427de67cac1e9fa54aaa09a28371d7", GitTreeState:"clean", BuildDate:"2021-06-16T12:59:11Z", GoVersion:"go1.16.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"18+", GitVersion:"v1.18.16-eks-7737de", GitCommit:"7737de131e58a68dda49cdd0ad821b4cb3665ae8", GitTreeState:"clean", BuildDate:"2021-03-10T21:33:25Z", GoVersion:"go1.13.15", Compiler:"gc", Platform:"linux/amd64"}

• Cloud provider or hardware configuration:

AWS EKS
Platform version
eks.6

• Others:

/kind bug

[cjose3]

I'm closing this issue because it has been addressed here
According to the AWS documentation related to kubernetes versions, this feature was introduced in 1.19 and we're using 1.18.