getting 502 Bad Gateway on eks aws-alb-ingress - kubernetes

Question

I created in AWS a EKS Cluster via Terraform using terraform-aws-modules/eks/aws as module. This cluster has one pod (golang app) using nodeport as service and ingress. The problem I have is that I'm getting 502 bad gateway when I hit the endpoint.
My config:
Deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
name: golang-deployment
labels:
app: golang-app
spec:
replicas: 1
selector:
matchLabels:
name: golang-app
template:
metadata:
labels:
name: golang-app
spec:
containers:
- name: golang-app
image: 019496914213.dkr.ecr.eu-north-1.amazonaws.com/goland:1.0
ports:
- containerPort: 9000
service:
kind: Service
apiVersion: v1
metadata:
name: golang-service
spec:
type: NodePort
selector:
app: golang-app
ports:
- protocol: TCP
port: 9000
targetPort: 9000
Ingress:
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: app
annotations:
alb.ingress.kubernetes.io/scheme: internet-facing
kubernetes.io/ingress.class: alb
labels:
app: app
spec:
rules:
- http:
paths:
- path: /api/v2
pathType: ImplementationSpecific
backend:
service:
name: golang-service
port:
number: 9000
kubectl get service
golang-service NodePort 172.20.44.34 <none> 9000:32184/TCP 106m
The security groups for the cluster and nodes were created by terraform-aws-modules/eks/aws module.
I checked severals things:
kubectl port-forward golang-deployment-5894d8d6fc-ktmmb 9000:9000
WORKS! I can see the golang app using localhost:9000 in my computer
kubectl exec curl -i --tty nslookup golang-app
Server: 172.20.0.10
Address 1: 172.20.0.10 kube-dns.kube-system.svc.cluster.local
Name: golang-app
Address 1: 172.20.130.130 golang-app.default.svc.cluster.local
WORKS!
kubectl exec curl -i --tty curl golang-app:9000
curl: (7) Failed to connect to golang-app port 9000: Connection refused
NOT WORKS
Any idea?

Answer 1

You should be calling the service not deployment.
golang-service is svc name instead of deployment name
kubectl exec curl -i --tty curl golang-service:9000