Have try more tests exemple :
restic --repo /tmp/backup backup --one-file-system / --exclude /tmp/backup*
But that no restore correctly in chroot.
Have try other exemple :
restic --repo /tmp/backup backup / --exclude-file=~/exclude
/dev/* /proc/* /run/* /tmp/*
That is a same in chroot this not restore correctly the backup.
Service is dead in /dev/null have other problem.
You have other idea ? is impossible to restore simply the backup ?