Exposing UDP and TCP ports for sftp server using Ingress in GKE - kubernetes

Question

I am trying to set up a multi-cluster deployment in which there are multiple clusters and one ingress is load balancing the requests between them.
HTTP services work well with the set-up the problem here is the sftp server.
Referring to this answer and this documentation I am trying to access port 22 of the sftp service.
Deployment of sftp is being exposed on port 22. Below is the manifest:
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: sftp
labels:
environment: production
app: sftp
spec:
replicas: 1
minReadySeconds: 10
template:
metadata:
labels:
environment: production
app: sftp
annotations:
container.apparmor.security.beta.kubernetes.io/sftp: runtime/default
spec:
containers:
- name: sftp
image: atmoz/sftp:alpine
imagePullPolicy: Always
args: ["user:1001:100:upload"]
ports:
- containerPort: 22
securityContext:
capabilities:
add: ["SYS_ADMIN"]
resources: {}
Here is the simple manifest for the sftp-service using NodePort service:
apiVersion: v1
kind: Service
metadata:
labels:
environment: production
name: sftp-service
spec:
type: NodePort
ports:
- name: sftp-port
targetPort: 9000
port: 9000
nodePort: 30063
protocol: TCP
selector:
app: sftp
ConfigMap create to referring to the above mentioned documentation and answer looks like below:
apiVersion: v1
kind: ConfigMap
metadata:
name: sftp-service
data:
9000: "default/sftp-service:22"
And finally the ingress manifest is something like below:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress-foo
annotations:
kubernetes.io/ingress.global-static-ip-name: static-ip
kubernetes.io/ingress.class: gce-multi-cluster
spec:
backend:
serviceName: http-service-zone-printer
servicePort: 80
rules:
- http:
paths:
- path: /sftp
backend:
serviceName: sftp-service
servicePort: 22
template:
spec:
containers:
- name: proxy-port
args:
- "--tcp-services-configmap=default/sftp-service"
I feel, I have not understood the way to expose the TCP/UDP port for sftp server on kubernetes using ingress. What am I doing wrong here?
Is there any other way to simple setup an sftp using ingress and NodePort service in a multicluster deployment?
Here is the official document I am referring to do the set-up.

Answer 1

looks like this isn't supported with ingress which is the reason that this issue exist
A possible solution could be to use nodeport for sftp as described in this document

Answer 2

You need to run an HTTP server.
You can run an HTTP server that exposes the same files maybe with a side container in the same pod