Ingress NginX TCP UDP

1. install ingress-nginx

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.2.0/deploy/static/provider/cloud/deploy.yaml

2. patch controller deployment & service

kubectl patch -n ingress-nginx deploy ingress-nginx-controller -p '{"spec":{"template": {
  "spec": {
    "containers": [
      {
        "name": "controller",
        "args": [
          "/nginx-ingress-controller",
          "--publish-service=$(POD_NAMESPACE)/ingress-nginx-controller",
          "--election-id=ingress-controller-leader",
          "--controller-class=k8s.io/ingress-nginx",
          "--ingress-class=nginx",
          "--configmap=$(POD_NAMESPACE)/ingress-nginx-controller",
          "--validating-webhook=:8443",
          "--validating-webhook-certificate=/usr/local/certificates/cert",
          "--validating-webhook-key=/usr/local/certificates/key",
          "--tcp-services-configmap=ingress-nginx/tcp-services"
        ]
      }
    ]
  }
}}}'

kubectl patch -n ingress-nginx svc ingress-nginx-controller -p '{"spec":{"ports":[{
  "name": "redis-port",
  "port": 6379,
  "targetPort": 6379,
  "protocol": "TCP"
}
]}}'

3. register TCP configmap

apiVersion: v1
kind: ConfigMap
metadata:
  name: tcp-services
  namespace: ingress-nginx
data:
  6379: 'hdgen/redis:6379'

1. create your deployment

2. create your service

3. check TCP connection (UDP is same with word changing)

Exposing TCP and UDP services - NGINX Ingress Controller

Ingress does not support TCP or UDP services. For this reason this Ingress controller uses the flags --tcp-services-configmap and --udp-services-configmap to point to an existing config map where the key is the external port to use and the value indicates the service to expose using the format: : :[PROXY]:[PROXY] It is also possible to use a number or the name of the port.

https://kubernetes.github.io/ingress-nginx/user-guide/exposing-tcp-udp-services/