[Borgbackup] Does anyone backup VMs using private Linux VM-bridges with SSHFS?

[Thorsten Schöning]

Hi all,

I have Proxmox running multiple different VMs and am considering
backing those up using Borg with SSHFS. The goal is to have backup
managed by the Proxmox-host only using PULL, like is pretty common
with SSH+RSYNC.

Though, that setup is mentioned in the FAQs to be somewhat slow,
because a lot of data needs to pass SSH, while with a client-server
setup the client within the VM only sends actually changed chunks.

OTOH, I can easily create private bridges in Proxmox not bridged to
any physical interface, but implementing a private network for the VMs
and the host only. this could easily be a private backup network
this way, not creating any public traffic at all in theory.

https://forum.proxmox.com/attachments/xproxmox-root-server-architektur-1024x595-png-pagespeed-ic-nq1avqgasy-png.27234/
https://forum.proxmox.com/threads/whats-the-preferred-counterpart-for-internalnetwork-of-virtualbox.91686/#post-399961

From my understanding that would only keep the CPU overhead because of
SSH, but without too much network related latency, without bandwidth
limits of real physical NICs etc.


Or am I missing something? Does anyone has any experience with that
approach?

Thanks!

Mit freundlichen Grüßen

Thorsten Schöning

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Für Rückfragen stehe ich Ihnen sehr gerne zur Verfügung.

Mit freundlichen Grüßen

Thorsten Schöning


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