code.delx.au - monosys/blob - bsnap/README.md

   1 # bsnap
   2
   3 Manage snapshots for backups using LVM or btrfs. This is intended for use with [borg](https://www.borgbackup.org) or [rsync](https://rsync.samba.org).
   4
   5 ## Usage
   6
   7 Running `bsnap on` will do the following:
   8 - Create a new directory `/a` where the snapshots will be mounted.
   9 - Take snapshots as configured in your `/etc/fstab`.
  10 - Mount the snapshots into `/a`.
  11
  12 At this point you can run something like [borg](https://www.borgbackup.org) or [rsync](https://rsync.samba.org) on `/a` to create your backup. Once that's completed you then run `bsnap off` to unmount, remove the snapshots and cleanup `/a`.
  13
  14 You must configure your `/etc/fstab` by setting the second last column for each entry:
  15 - `0` -- no snapshot will be taken and the filesystem will not be mounted into `/a`
  16 - `1` -- no snapshot will be taken but the filesystem will be bind mounted into `/a`
  17 - `2` -- a snapshot will be taken and the snapshot will be mounted into `/a`
  18
  19 ```
  20 # Snapshot the LVM root filesystem
  21 /dev/mapper/vg-root  /      ext4  defaults  2 0
  22
  23 # Mount it into /a so it's included in the backup without snapshotting it
  24 UUID="ABCD-1234"     /boot  vfat  defaults  1 0
  25 ```