Would this easy (host) backup-restore method work?

[bytesonend]

Hi

I am on the lookout for an easy and not too space consuming way to backup of my Proxmox host.

I have been looking at Clonezilla but this method isn't ideal for me as my Proxmox is installed on a mirrored zfs pool and thus Clonezilla only supports full-disk (200GB in my case) backups.

Therefore I'm wondering if the following would work:

Backup:
1) Take a zfs snapshot of the rpool and send it to another zpool/dataset

Restore (form the unlikely event of a total OS disks failure):
1) Physically install 2 new disks
2) Do a fresh install of proxmox similar to the original installation, in order to get the efi, grub, etc. partitions created correctly
3) Boot from an bootable usb-drive - could be Ubuntu 20.04 i guess, as it has baked in zfs support
4) Mount the zpool/dataset holding the snapshot and import the newly created rpool
5) Restore the snapshot onto the new rpool
6) Unmount the rpool and boot back into Proxmox

Would the above work and are there any steps I've missed?
And how would I get Proxmox to boot again after the restore as the rpool is now not imported?

Thanks in advance.

 

[Dominic]

I'd really recommend trying it out because only a tested backup is a real backup. As a first step, you can do so by creating a virtual PVE inside PVE: https://pve.proxmox.com/wiki/Nested_Virtualization#Enable_Nested_Hardware-assisted_Virtualization

 

[bytesonend]

Thanks, that's a great advise and I totally agree that an untestet backup is not a backup.

But the point is that I'm still learning zfs so any initial sanitizing of the method I lay out would be great help.

Thanks in advance...