Kubernetes Ingress servicePort alternative

Question

In order to specify ingress bancked, we have to specify servicePort and serviceName, for example:

backend:
      serviceName: test
      servicePort: 80

I want to create services with random ports and avoid specifying them in the ingress definition. Are there any alternatives to servicePort? Maybe use port name or targetPort that are assigned in the service?

Answer 1

AFAIK usual pattern is to use Ingress with a service type ClusterIP, so you will not be concerned about port collisions.
You may have separate service with same selector for e.g. NodePort if needed, but this will not be concern of Ingress.

Answer 2

Check out this example that allows to avoid all the hassle with setting up ingress, certbot and proxy https://github.com/gwrun/tutorials/tree/main/k8s/pod