[escardin]

that sounds like your pod-cidr, service-cidr, or network plugin are misconfigured. As another person said, going through the hard way could help you understand, but realistically you need to take some time to understand your network plugins config and the kubeadm flags for configuring cidrs.

I went through your problem before on a practice cluster and ended up giving up on that one.

Realistically the hard way doesn't actually explain much of the commands you're running, and much of it covers the tedium of getting the many many certs you need to bootstrap everything (which will then expire and not rotate automatically). It's much better to just use kubeadm, and take some time to read all the args to kubelet, kubeadm, kubeproxy, etc...