Proxmox VE is a complete, open-source server management platform for enterprise virtualization. It tightly integrates the KVM hypervisor and Linux Containers (LXC), software-defined storage and networking functionality, on a single platform. With the integrated web-based user interface you can manage VMs and containers, high availability for clusters, or the integrated disaster recovery tools with ease.
I tried that, it didn't seem to work very well over a WAN link. Maybe it's gotten better, but I went back to a cheap old desktop AIO with a local drive, then had it remote sync to the offsite.
I guess it depends how you want to do it, but having a local copy of the backup to quickly restore from at LAN speeds seems better to me anyway, and I've certainly used it because it was available and easy. The remote sync is for the building burning down.
When you say „didn’t work very well“ do you mean performance was not good?
A local backup synced to cloud is a valid solution, it’s just that I’d like to skip the local part because I feel it’s superfluous for my usecase.
Up- and downlink are fast enough and because the data only changes very slowly, storing deltas in a remote backup location should be fast enough.
It wasn't reliable. Maybe they've fixed that, but I couldn't trust it the way it worked then. It's been a couple years though, so there's that.
I guess it's your call about whether a local is superfluous, but I find it pretty useful.
I have a dedicated server for PVE and another one for PBS, and by linking the PBS storage on the PVE server I can backup and also restore my LXC/VM from PBS. I also have 1 local backup copy on the PVE server for my really important services (DNS, Proxy, etc..) to allow quicker restauration of these services.