I’m thinking about starting a self hosting setup, and my first thought was to install k8s (k3s probably) and containerise everything.
But I see most people on here seem to recommend virtualizing everything with proxmox.
What are the benefits of using VMs/proxmox over containers/k8s?
Or really I’m more interested in the reverse, are there reasons not to just run everything with k8s as the base layer? Since it’s more relevant to my actual job, I’d lean towards ramping up on k8s unless there’s a compelling reason not to.
If everything you want to run makes sense to do within k8s it is perfectly reasonable to run k8s on some bare-metal OS. Some things lend themselves to certain ways of running them better than others. E.g. Home Assistant really does not like to run anywhere but a dedicated machine/VM (at least last time I looked into it).
Regardless of k8s it may make sense to run some sort of virtualization layer just to make management easier. One panel you can use to access all of the machines in you k8s cluster from a console level can be pretty nice, and a Proxmox cluster would give you this. You can make a VM on a host that takes up basically all of the available RAM/CPU on it. Proxmox specifically has some built-in niceties with gluster (which I’ve never use, I manage gluster myself on bare metal) which could even be useful inside a k8s cluster for PVCs and the like.
If you are willing to get weird (and experimental) look into Rancher’s Harvester it’s an HCI platform (similar to Proxmox or vSphere) that uses k8s as its base layer and even manages VMs through k8s APIs… I played with it a bit and it was really neat, but opted for bare metal Ubuntu for my lab install (and actually moved from rke2 to k3s to Nomad to docker compose with some custom management/clustering over the course of a few years).