AWS EKS service ingress and ALB --no ADDRESS - kubernetes-ingress

Question

I seem to be having an issue with the way my ports are setup on this manifest, which is a simple go app. The app is configured to listen on port 3000.
This container runs fine on my local machine (localhost:3000), but I get no ADDRESS when I look at the Ingress (k get ingress ...).
I am getting an error logged in the AWS aws-load-balancer-controller log when I try to run this image on EKS:
controller-runtime.manager.controller.ingress","msg":"Reconciler error","name":"fiber-demo","namespace":"demo","error":"ingress: demo/fiber-demo: unable to find port 3000 on service demo/fiber-demo"
This is my k8s manifest:
apiVersion: apps/v1
kind: Deployment
metadata:
name: fiber-demo
namespace: demo
labels:
app: fiber-demo
spec:
replicas: 1
selector:
matchLabels:
app: fiber-demo
template:
metadata:
labels:
app: fiber-demo
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/arch
operator: In
values:
- amd64
- arm64
containers:
- name: fiber-demo
image: 240195868935.dkr.ecr.us-east-2.amazonaws.com/fiber-demo:0.0.2
resources:
requests:
memory: "64Mi"
cpu: "250m"
limits:
memory: "128Mi"
cpu: "500m"
ports:
- containerPort: 3000
---
apiVersion: v1
kind: Service
metadata:
name: fiber-demo
namespace: demo
labels:
app: fiber-demo
spec:
selector:
app: fiber-demo
ports:
- protocol: TCP
port: 80
targetPort: 3000
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: fiber-demo
namespace: demo
annotations:
kubernetes.io/ingress.class: alb
alb.ingress.kubernetes.io/scheme: internet-facing
labels:
app: fiber-demo
spec:
rules:
- http:
paths:
- path: /
backend:
serviceName: fiber-demo
servicePort: 3000
Am I simply not able to specify a targetPort other than port 80 in the Service?

Answer 1

Am I simply not able to specify a targetPort other than port 80 in the Service?
backend.servicePort refers to port exposed by service, not container.
...
backend:
serviceName: fiber-demo # <-- ingress for this service, not container
servicePort: 80 # <-- port which the service exposed, not the port which the container exposed.