Cross reference: Not backing up mounted subfolders

[mrclschstr]

Cross reference: Since version 1.8.10, the volume /mnt/source is no longer in the Dockerfile, which has side effects when backing up subfolders.

For details see: modem7/docker-borgmatic#125

[modem7]

Just to make things easier for others looking:

modem7/docker-borgmatic#125 (comment)

[witten]

Note that this unfortunate interaction may go away with borgmatic 1.9.0 because (from the release notes):

• BREAKING: When databases are configured, don't auto-enable the "one_file_system" option,
  as existing auto-excludes of special files should be sufficient to prevent Borg from hanging on
  them. But if this change causes problems for you, you can always enable "one_file_system"
  explicitly.

See https://projects.torsion.org/borgmatic-collective/borgmatic/issues/918 for more info.

[mrclschstr]

I still think it is worth mentioning in the readme of the borgmatic container that enabling the one_file_system option can cause problems when backing up mounted subfolders. If you are not careful and do not check the backup (which of course you should never do), empty and therefore unusable backups are silently created.