I've a shipped app where a URL is hardcoded "upload.mydomain.io:123123/myRoute".

This DNS points to an VM where an NGINX distributes the traffic to services. Now I need to put a highly scalable service in front of the VM, WITHOUT having the possibility to change the hardcoded URL. I've tried so far:

• Cloud Functions
• App Engine
• Cloud Run
• My own Kubernetes Cluster.

As an DNS Distributer I use Cloudflare, where I also tried to do something with Page Rules.

Functions -> No Domain in EU

Cloud Run -> Only Port 80

App Engine -> Only Port 8080

Kubernetes Ingress -> I can put my Domain on, also with the port as Service port, but then in the URL the port is gone

This is my Kubernetes Manifest:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: myApp-api
  name: myApp-api
spec:
  replicas: 3
  strategy:
    type: Recreate
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: myApp-api
    spec:
      containers:
      - name: myApp-api
        env:
        - name: NODE_ENV
          value: production
        image: eu.gcr.io/myApp-123/myApp-api:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 21337
      restartPolicy: Always
status: {}


---

apiVersion: v1
kind: Service
metadata:
  labels:
    app: myApp-api-service
  name: myApp-api-service
spec:
  ports:
  - name: myApp-api-port
    port: 21337
    targetPort: 21337
  selector:
    app: myApp-api
  type: LoadBalancer
status:
  loadBalancer: {}

---

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: myApp-api-ingress
spec:
  tls:
  - hosts:
    - upload.myDomain.io
    secretName: tls-secret
  rules:
  - host: upload.myDomain.io
    http:
      paths:
      - path: /*
        backend:
          serviceName: myApp-api-service
          servicePort: myApp-api-port

Is it possible somehow to create this route with some service?