Offsite Backup for Linstor + Incus Cluster Setup

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Hello everyone,

I have a 3-node Incus cluster (each has zfs pool) connected to a Linstor controller, where all 3 nodes are Linstor satellites with many VMs running on them.

Since the nodes share storage over Linstor if a node dies I can still access the VMs but I’m trying to plan for a total disaster scenario: what happens if all 3 nodes die at the same time?

I was planning to have offsite backups of the VMs in a bucket (Wasabi) but the Incus back up methods did not worked out for me. Snapshots are internal and export is taking the whole VM as a copy and it is not incremental. I do not want to use another Incus server for the backups. Is there any way to make me take incremental backups of the VMs in Incus?

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Just thinking loud, do you have the chance to sync linstor snapshots somewhere?

As in btrfs / zfs support something like btrfs send | btrfs receive is there something like that with linstor?

This is what a quick research gave me:

Please also note that you have to backup the incus database as well (let’s say in case of hardware loose):

incus admin sql global .dump > incus-global-$(date).sql

Please let me know about your way to go.