My use case is a homelab kubernetes cluster, so I want multiple nodes for redundancy, but I don’t want to use too much electricity or generate too much heat. But for the sake of other readers, let’s keep it general:
What’s a nice little computer for a homelab, with its own power supply, ethernet, and room for 2 internal disks?
A mini PC is likely a good fit. Depending on the one you have they will have space for an extra nvme drive or a 2.5 inch data ssd.
You can load Proxmox and run as many VMs or lxc K8s workers.