Kubernetes: Routing non HTTP Request via Ingress to Container

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This is not well supported via the ingress mechanism and is an open issue.
There is a work around for tcp or udp traffic using nginx-ingress which will map an exposed port to a kubernetes service using a configmap.
See this doc.

Start the ingress controller with the tcp-services-configmap (and/or udp-services-configmap) argument. 

args: 
- "/nginx-ingress-controller"
- "--tcp-services-configmap=default/nginx-tcp-configmap"
- "--v=2"

deploy configmap:

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-tcp-configmap
data:
  9000: "default/example-service:8080"

where 9000 is the exposed port and 8080 is the service port

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