# Example btrbk configuration file

# Create snapshot into subdirectory
snapshot_dir               _btrbk_snap

# Always create snapshots, even if the target volume is unreachable
snapshot_create_always     yes

# Perform incremental backups (set to "strict" if you want to prevent
# creation of initial backups if no parent is found)
incremental                yes

# ssh key for ssh volumes/targets
ssh_identity               /etc/btrbk/ssh/id_ed25519
ssh_user                   root

# Preserve weekly/monthly backups from given day of week
preserve_day_of_week       sunday

# Preserve matrix for snapshots
snapshot_preserve_daily    14
snapshot_preserve_weekly   0
snapshot_preserve_monthly  0

# Preserve matrix for backups
target_preserve_daily      20
target_preserve_weekly     10
target_preserve_monthly    all

# Make sure the deletion of subvolumes is committed to disk when btrbk terminates
btrfs_commit_delete        after

# Dump verbose output of "btrfs receive" to a specified file. If set
# to "sidecar", the file will be named "<backup_subvolume>.btrbk.log".
# Note that this log file can become very big, as every change of
# every file is being logged.
#receive_log               /var/log/btrbk_receive.log
#receive_log               sidecar
receive_log                no


#
# Volume section: "volume <vol_dir>"
# <vol_dir>: Directory of a btrfs volume (or subvolume) containing the
#            subvolume to be backuped (usually the mount-point of a
#            btrfs filesystem mounted with subvolid=0 option)
#
# Subvolume section: "subvolume <subvol>
# <subvol>:  Subvolume to be backuped, relative to <vol_dir> in
#            volume section
#
# Target section: "target <type> <vol_dir>"
# <type>:    Backup type, currently only "send-receive"
# <vol_dir>: Directory of a btrfs volume (or subvolume) receiving the backups
#
#
# NOTE: The parser does not care about indentation, this is only for
# human readability. The options always apply to the last section
# encountered, overriding the corresponding option of the upper
# section. This means that the global options must be set before any
# "volume" section.
#

volume /mnt/btr_system
  subvolume  root_gentoo
    target send-receive    /mnt/btr_ext/_btrbk
    target send-receive    /mnt/btr_backup/_btrbk
      receive_log sidecar

  subvolume  kvm
    # use different preserve matrix for kvm backups
    target_preserve_daily  7
    target_preserve_weekly 4

    target send-receive    /mnt/btr_ext/_btrbk
      target_preserve_weekly 0

    target send-receive    /mnt/btr_backup/_btrbk


volume /mnt/btr_data
  subvolume  home
    target send-receive    /mnt/btr_backup/_btrbk
    target send-receive    ssh://backup.my-remote-host.com/mnt/btr_backup


volume /mnt/btr_ext
  subvolume data
    target send-receive    /mnt/btr_backup/_btrbk

volume /mnt/btr_boot
  incremental yes

  subvolume boot
    target send-receive    /mnt/btr_ext/_btrbk
    target send-receive    /mnt/btr_backup/_btrbk


volume ssh://my-remote-host.com/mnt/btr_pool
  subvolume system
    target send-receive    /mnt/btr_backup/_btrbk/my-remote-host.com