Connecting Centos VMs to each other for K8s

Question

Im trying to set up kubernetes on my centos VMs using virtualbox. I prefer to use the kubeadm method, so that I can join slave nodes with a join token.

My issue is that I think I am lacking understanding of how to connect my VMs to one another beforehand. This is the resource I am using for the Kubernetes installation: https://www.profiq.com/kubernetes-cluster-setup-using-virtual-machines/

When I create VMs and run ifconfig, they all have the same IPs listed, even if they are new VMs and not just a copy of the original. I must be doing something wrong.

Anyway, Im just wondering if anyone would be so kind as to give me some steps to get my VMs talking to each other, just to be sure Im doing it correctly. Im following the article I posted, and can ping each VM from the other, but then ran ifconfig and, since each machine has the same 10.0.2.15 IP, I feel like its just pinging itself and not the master from slave, etc

Answer 1

Did you perform the step after the cloning and before you load kubernetes to change the IP addresses of the 2nd and 3rd VM?

from the instructions you are following, I see:

Now create a linked clone machines from kubemaster machines created before. Once you’re done, boot into machine and change following things to match infrastructure:

Set IP address 192.168.99.21 (or 22 for second slave) for host only network.
Set hostname hostnamectl set-hostname kubeslave1 (or kubeslave2 for second slave) Everything else is already configured.