How many control plan nodes and worker nodes are required for high availability? I have heard some of the following proposals:
3 Master 2 workers.
But would this avoid split brain scenarios? Is it sufficient to have an odd number of nodes at the control plane node level?
Also, when scaling, should the control plane nodes always scale in odd number increments? For example, from 3 to 5 to 7? Is there a similar requirement at the worker node level?