Ingress redirect to a localhost tcp service

I have a local website. The website was created by a docker-compose and it is listening on a localhost port 3000.

When I try:

curl 127.0.0.1:3000

I can see the response.

What I did:

From my domain provider I edited the DNS to point to my server, then I changed nginx-ingress:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: virtual-host-ingress
  namespace: ingress-basic
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
    nginx.ingress.kubernetes.io/use-regex: "true"
    cert-manager.io/cluster-issuer: "letsencrypt-pp"
spec:
  tls:
  - hosts:
    - nextformulainvesting.com
    secretName: ***
  rules:
  - host: "nextformulainvesting.com"
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: e-frontend-saleor
            port:
              number: 80

and I created the service:

apiVersion: v1
kind: Service
metadata:
  name: e-frontend-saleor
spec:
  ports:
    - protocol: TCP
      port: 80
      targetPort: 3000

But with the service or without the service I receive the error 503 Service Temporarily Unavailable.

How can I use nginx-ingress to point to my local TCP service?

Solution

To clarify the issue I am posting a community wiki answer.

The answer that helped to resolve this issue is available at this link. Based on that - the clue of the case is to create manually a Service and an Endpoint objects for external server.

After that one can create an Ingress object that will point to Service external-ip with adequate port .

Here are the examples of objects provided in similar question.

Service and an Endpoint objects:

apiVersion: v1
kind: Service
metadata:
  name: external-ip
spec:
  ports:
  - name: app
    port: 80
    protocol: TCP
    targetPort: 5678
  clusterIP: None
  type: ClusterIP
---
apiVersion: v1
kind: Endpoints
metadata:
  name: external-ip
subsets:
- addresses:
  - ip: 10.0.40.1
  ports:
  - name: app
    port: 5678
    protocol: TCP

Ingress object:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: external-service
spec:
  rules:
  - host: service.example.com
    http:
      paths:
      - backend:
          serviceName: external-ip
          servicePort: 80
        path: /