The pibox runs as a master and worker at the same time - and most folks just use them as individual servers (if they have two "clusters", they're just clusters of one server each). We really want to lean into improving this in the future! Several power users have complex setups with a PiBox acting as the master for a number of other servers (and our UI and software mostly just works even with multiple nodes). Under the hood, it's really just k3s - our software is designed to work with any Kubernetes cluster, so things all mostly fit together naturally!

I'd love to make it really easy for users to cluster nodes together. 100% on our roadmap if we can get there!