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@claus @badnetmask @homelab Kubernetes calls these "control plane" in the docs, in case that is confusing for anyone, but yeah, odd numbers only.

Another gotcha is adding too many nodes. Latency be intense on a heavy system. Galera docs say no more than 9 (or did, it has probably been a couple of years since I have had to dig that out and scold a customer that should know better with it)