What I am doing right now:

I own many VPS which I use to deploy applications with Docker compose, most of the machines come from different subnets and have a public static IP address.

For each new application I would pick a random VPS, assign the new application's subdomain's DNS with the VPS' IP address and deploy my application in this VPS behind an Nginx proxy (jwilder Nginx).

This approach is in my opinion very comfortable since jwilder's Nginx does almost the work for me and I only have to assign the correct DNS.

What I want to achieve:

For the purpose of learning, I would like to take the machines and make a Kubernetes cluster out of them, so I could learn more about this technology. My idea is that I only have to assign new subdomain's DNS to one single point, which also plays the role of a load balancer and pass the traffic to corresponding pods.

To redirect traffic to a new application I only have to configure the load balancer.

My problem:

I know this question is not very precise since I don't know a lot of Kubernetes. Moreover, my servers are not from a cloud provider like Google or AWS and I, therefore, can not use their solutions. They are not even from a single cloud provider, most of them are of my university and some are from a private cloud provider.

Could anybody tell me how can I achieve this?