Can Veeam Agent for Linux just backup an entire volume, regardless of what's on it?

[Niko-O]

I want to use Veeam Agent for Linux to backup the primary drive of my Proxmox PVE 0.9 NAS. I.e. the drive that holds the Proxmox installation itself, VM configuration, container configuration, VM disks, container disks, etc., but not the HDDs that are served out as network shares by one of the VMs.
I am begrudgingly OK with shutting down all VMs/containers that run on the device, letting Veeam create the backup, and then starting all of the VMs/containers again. I would prefer if I didn't have to do that, but I've seen mention of running VMs/containers causing problems (veeam-agents-for-linux-mac-aix-solaris- ... 37398.html), so if it has to be, then so be it. I could get a similar result by shutting down the entire NAS and cloning the drive with CloneZilla, at the expense of a lot more time, effort and storage, so I'd prefer to use Veeam.

Should Veeam Agent for Linux be able to do that? Should I expect any particular issues (assuming that I shut down the VMs/containers)?