Why do Kubernetes Control Planes have an odd number of members?

 June 29, 2023

The single most frequent question I get asked about Kubernetes is regarding the number of Control Plane nodes. Sometimes it is out of curiosity for the “unusual number”; other times, it is plainly confrontational since the person would prefer a different number, which usually is 2.

The first thing to understand is that there are a couple of reasons to choose a certain number of Kubernetes Control Plane nodes over another, and those are: