Re: restic backup with btrfs /

[Ulli Horlacher <framstag@rus.uni-stuttgart.de>]

On Mon 2025-06-30 (11:07), Mark Harmstone wrote:
> On 28/06/2025 6.33 pm, Ulli Horlacher wrote:
> 
> > restic (https://restic.net/) is a great backup tool but has some
> > limitations or design flaws: one is, it believes that any subvolume is on a
> > different filesystem. This means: "restic backup --one-file-system /" will
> > only backup the root subvolume, but no other subvolumes like /home
> > /var/spool etc...
> 
> This is a bug in Restic that needs to be fixed

I have reported this already at the restic bug tracker, but the restic
developpers say, it is a btrfs problem and they will not fix it.


> > My idea is now: I do not backup the original /, but do:
> >
> > mount --bind / /backup/restic
> > restic backup /backup/restic
> > umount /backup/restic
> >
> > Next evolution step:
> > I could recursivly mount-bind other filesystems into /backup/restic/
> > For example:
> >
> > mount --bind /local /backup/restic/local
> > mount --bind /data /backup/restic/ldata
> 
> This is unlikely to work, as bind mounts will also be seen as different
> filesystems.

No problem here, because I will will use the option --one-file-system
See above.

"restic backup /" vs "restic backup /backup/restic" !
The first one includes EVERYTHING: /proc /nfs /mnt/tmp ...


-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK
Universitaet Stuttgart         E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    https://www.tik.uni-stuttgart.de/
REF:<82b6ddab-0eef-47b8-8010-9b09fcb70444@harmstone.com>