Can you mount CephFS on PBS as Datastore?

[Noah0302]

Hello guys,

we have a PBS running in our Dev-Environment with a Tape-Lib attached, but as I found out, you can only backup to tape if the backups are on a Datastore beforehand...
Originally I was planning to backup directly to tape, so I deployed a 1U PBS Server that barely has enough space for 2 Boot-Drives in Raid 1 and a PCIe-Card to connect to the Lib. There is no way of adding more local storage to the PBS!

So, I thought of maybe mounting CephFS fom our PVE-Cluster as a Datastore on PBS and then writing the backups to tape, if that is even possible.
I am fully aware, that if the Cluster fails, the mounted CephFS will also stop working, but that is not a problem as its only there as a middleman betweet PBS and the Tape-Lib. Also I do know that it most likely will be pretty slow.

Does anyone know if this is feasible?

Alternatively I thought of mounting an NFS-Share as a Datastore from out TrueNAS.

Thanks for reading!

 

[fabian]

I think both should work, and as you noted, but are far from ideal setups (the additional latency will definitely hurt performance).

 

[Noah0302]

I think both should work, and as you noted, but are far from ideal setups (the additional latency will definitely hurt performance).

Thank you for the reply.

How would I go about adding CephFS in PBS as a Datastore?
Can I just do it in the same way as it is described in the PVE Wiki, or does PBS need special attention to do it?
https://pve.proxmox.com/wiki/Storage:_CephFS

 

[fabian]

you need to take care of mounting yourself, then create the datastore in the GUI or via proxmox-backup-manager