--exclude-file vs. BTRFS snapshot

[mestrode]

I was able to solve both topics using unshare

see:

Rewrite source path on backup?

I use Linux mount namespaces to work around this. My restic wrapper takes ZFS snapshots of all pools, does a unshare(CLONE_NEWNS), sets private mounts, sets up the sandbox with snapshot mounts, bind mounts what needs to be read-write like caches, tmpdir, log dir, does the pivot_root dance to create a mirror view of the real filesystem and runs restic as per usual. This way paths show as they really are in the sandbox and backups are atomic and don’t run off the live changing system. A namespace …