Veeam Backup for Proxmox – Architecture and Setup (Part 1)

This host was migrated in-place from 6.x to 7.x a long time ago, then was migrated in-place to 8.x using official migration documentation… 

Are you able to spin up a new 8.2 instance of Proxmox to try?

Maybe something is missing after the upgrades on this host, or there's some kind of incompatibility. Perhaps you can open a case and let our support check.

I have another 8.2 cluster here, I will try on this cluster… 

Sounds good.  Let us know what happens and if this works.

Hi all,

I am trying to test things out and it looks like the Veeam is only able to do backup of running VMs. If the VM is stopped, I see :

“Failed to perform backup: Failed to connect the NBD server to the hypervisor host ”

Please do you have any idea, what it could be ?

Thanks in advance,

BR,

Leela

@Leela Backup of powered-off VMs is also possible, so in general you shouldn't see any issues here. As we rescan the Proxmox host every 15 minutes, have you tried to backup the VM again after some time?

Hi Regnor,

yes, I did try it. If the Veeam does not find the VM on the expected host (moning VM and not waiting the 15 minutes), the error is different. I did try to remove and add the Proxmox proxy, but always the same error. :( When the VMs are powered on, everything is OK.

What kind of virtual disks does this VM have? QCOW2, RAW or VMDK?

The VMs are running on Proxmox cluster. Some of the disks are on ZFS (and being replicated to other  cluster nodes), I think there it has to be RAW, some of them are on Ceph, I think they are QCOW2. The behaviour is the same for all of the VMs.

I don’t see any possible issues there. Maybe you can open a case and let support check your logs for those VMs.

I don`t have a payed license :(

You can still open a case with support.  It is best effort support but hopefully you get an answer.

thanks..

@DecioMontagna  - I was getting this socket error as well with the same RESTAPI paths… and while I thought DNS wasn’t my issue either, it definitely was.  Everything appeared resolvable between the PVE hosts and VBR, it was the worker that couldn’t talk to the hosts by NETBIOS name.  My hosts have valid DNS records on the server I specified in the worker config, and I had the PVE hosts added to VBR via the NETBIOS name and not the FQDN.  I removed the PVE hosts from VBR and readded them with the FQDN and redeployed the workers.  As soon as I did that, the worker test worked without issue.

Not sure if you might have the same issue but could be something worth looking at.

So, for me, like @Rick Vanover said….it’s always DNS 😆

What is the default username and password of the linux worker? t test de DNS resolution? 

I’m curious as to how the pve backup works when the VMs are stored on LVM (block storage over FC).  in the Veeam doco it states

“Veeam Backup for Proxmox VE creates a Proxmox VE copy-on-write snapshot of each VM added to a backup job. The snapshot is further used to create a VM backup.”

I know on LVM you can’t create snapshots in proxmox, so how is Veeam getting the point in time for the backup?

 

When you deploy the worker vm, it ask you to specify a compatible snapshot storage for maintain the snapshots if the source vm is stored in a storage that does not support it. If you do not have any storage compatible to specify, it will not work.

Nobody else having this problem ? I did find out, that when the VM is powered on, the backup starts and then I can shutdown the VM and all is still OK.

Could somebody please explain, what is in this case the NBD server ? The HV host is probably the Proxmox server, or?  “ Failed to connect the NBD server to the hypervisor host”

NBD is the “Network Block Device” mode used for the proxy backup to copy data on-the-fly between the pve node and the veeam server. 

The pve plugin for veeam still does not support DSA “Direct Storage Access” in order to backup data.

I got Failed to refresh entities.

anyone does why ? I tried in two nodes proxmox 8.22 in one is fine and in one I got Failed to refresh entities. when add the proxmox server.

Help..

Bitcircuit wrote:

Hey there,

 

currently getting the error “Failed to get HypervisorNetwork[]. Method ‘GET /nodes/host/sdn/zones’ not implemented” when adding a Proxmox VE Worker. 

Any idea why this happens?

 

E: Running Proxmox 8.2.4

 

Has anyone fixed this issue?

Hello,

We also had the error that Leela indicates when we had vms powered off in proxmox and we backed them up in Veeam: "11/28/2024 9:14:08 AM :: hostname-machine : Failed to perform backup: Failed to connect the NBD server to the hypervisor host."

In our case, what we did so that Veeam performed the backup without error, is to remove the vm from the proxmox HA, or set the vm in "ignored" mode in the "Request State" field.

All the best

Thanks for the answer!

I will try this, but I am afraid, that this can not even be used as an workaround. HA is important :(

Best regards,

Leela

I can confirm the observation from ABA74...