Ingress-nginx

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

https://github.com/kubernetes/ingress-nginx/blob/main/docs/examples/rewrite/README.md

Install

kubectl create namespace ingress-nginx
helm install --namespace ingress-nginx ingress-nginx ingress-nginx/ingress-nginx

Testing

kubectl run my-test-container --image=alpine -it --rm -- /bin/sh
apk add bind-tools curl
host ingress-nginx-controller.ingress-nginx.svc.cluster.local

Keys

---
apiVersion: v1
kind: Secret
metadata:
  name: tls-monitor-example-com
type: kubernetes.io/tls
data:
  tls.crt: "mybase64encoded crt"
  tls.key: "mybase64encoded key"

Example of ingress.yml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-nginx
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  tls:
  - hosts:
    - monitor.example-com
    secretName: tls-monitor-example.com
  rules:
    - host: monitor.example.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: zabbix-web
                port:
                  number: 8080
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: tcp-services
  namespace: ingress-nginx
data:
  10051: "zabbix/zabbix-server:10051"
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: udp-services
  namespace: ingress-nginx
data:
  162: "zabbix/zabbix-server:162"

Working

https://stackoverflow.com/questions/61430311/exposing-multiple-tcp-udp-services-using-a-single-loadbalancer-on-k8s

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