It seems nobody really tested 11 to 13, or maybe any kind of major-version-skipping and you won’t find direct experiences here.
Your best bet is to follow the official procedure, so 11 -> 12 -> 13. I’ll leave you with the official upgrade guide for 11 to 12 and 12 to 13.
It seems longer than it is, as not every step is actually required for every system. When upgrading VMs, a snapshot pre-upgrade can also help you skip backup-steps in the guides.
Proxmox Virtual Environment (PVE, Hypervisor), my beloved. Especially in combination with Proxmox Backup Server (PBS).
My homelab would not exist without Proxmox VE, as I’m definitely not going to use Nutanix or VMWare. I love working with linux and Proxmox VE is literally debian with a modified kernel and a Management Webinterface on top.
I first learned about Proxmox VE in my company, while we still had VMWare for us and all of our customers. We gradually switched everyone over to Proxmox VE and now I’m using it at home too. Proxmox is an Austrian (my country) company, so I was double hyped about this software.
A few things I like most about Proxmox VE
(*) What I mean by ease of access to the correct part of the documentation is: Whenever you’re in the WebUI and need to decide on some settings, there’s a button somewhere on the same page which is going to lead you directly to the portion of the documentation you need right now. I don’t know why this seems like such a great luxury, every software should have something like this.
Next steps
My “server” (some mini PC with spare parts I already had) is getting too weak for the workload I put it through, so I’m going to migrate to a better “server”. I already have a PC and most of the necessary parts, I just need some SSDs and an AMD CPU.
Even migrating from PVE (old) -> PVE (new) couldn’t be easier:
I think it’s great to have a series posting about personal achievements and troubles with selfhosting. There’s so much software out there, you always get to see someone doing something you didn’t even know could be done or using a software you didn’t realize even existed. Sharing is caring.
Of course you can always build a good PC or server.
I could have done that too, but I wanted my first real homelab-do-it-all-yourself setup to be a little more on the cautiously small side. I didn’t want to have too much noise in my apartment and also didn’t want to stress my electricity-bill and wallet too much, so I opted to build small and reuse what I had lying around.
I already had 2 Mini-PCs and a raspberry pi from earlier experiments with selfhosting. I just bought some disks and RAM. If you don’t have any mini-PCs, they’re relatively cheap in comparison with full PCs. Or you could use some older PC you still have but do not use.
My motto more or less was you can always spend more money and build bigger later
The final Hardware
What I host on my Proxmox VE
The 2nd Mini PC (some old intel NUC with 4 cores and 16 GB RAM) + a USB HDD is my Proxmox Backup Server for all this. And what’s really important (my data from nextcloud + some configs) gets backed up to my Hetzner Storage Box with restic.
The raspberry pi is now my WiFi Access Point :)
Conclusion
Homelab doesn’t need to be big or small, it can be whatever you want it to be or whatever you can afford or are willing to have and maintain. From my experience, if you’re not hosting anything CPU-intensive, older or smaller machines will do just fine.
For example, my nextcloud could easily use more resources than the whole Zotac ZBox could house, if there were more users. But as my services are only used by me, most of them are idle most of the time.
Tip at the end about your opsense-VM on Proxmox
I tried letting Proxmox host my pfSense too, but that got old pretty fast. Whenever Proxmox needed a Reboot, my internet was gone too for that time, as the pfSense VM on Proxmox was the gateway to my ISP-modem. In the end, I just bought a real Netgate pfSense appliance.
To me it seems like:
I’d try Proxmox VE and, if you’re also searching for a Backup Server, Proxmox Backup Server.
I recommend these because:
I personally run a Proxmox VE + Proxmox BS setup in 3 companies + my own homelab.
It’s not magic, Proxmox VE is literally Debian 13 + qemu + kvm with a nice webui. So you know the tech is proven, it’s just now you also get an easy to use interface instead of
virshconsole commands orvirt-manager.I personally like a stable infrastructure to test and run my important and experimental tuff upon. That’s why I’m going with this instead of managing even the hypervisor myself with Arch.