scripts/borg-backup.snowboard.sh

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#!/bin/sh
# Setting this, so the repo does not need to be given on the commandline:
export BORG_REPO=/srv/data/backup/borg/snowboard
# See the section "Passphrase notes" for more infos.
export BORG_PASSPHRASE="$(cat /root/secret/borg-snowboard.key)"
# some helpers and error handling:
info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
info "Starting backup"
# Backup the most important directories into an archive named after
# the machine this script is currently running on:
/usr/bin/borg create \
--verbose \
--filter AME \
--list \
--stats \
--show-rc \
--compression zstd,11 \
--exclude-caches \
--exclude '/home/*/.cache/*' \
--exclude 'var/tmp/*' \
--exclude 'var/cache/*' \
--exclude 'srv/data/backup' \
--exclude '*/.Trash*' \
\
::'{hostname}-{now}' \
/etc \
/lib \
/home \
/root \
/var \
/opt \
/srv
backup_exit=$?
info "Pruning repository"
# Use the `prune` subcommand to maintain 3 daily, 3 weekly and 6 monthly
# archives of THIS machine. The '{hostname}-*' matching is very important to
# limit prune's operation to this machine's archives and not apply to
# other machines' archives also:
/usr/bin/borg prune \
--list \
--glob-archives '{hostname}-*' \
--show-rc \
--keep-daily 3 \
--keep-weekly 3 \
--keep-monthly 6
prune_exit=$?
# actually free repo disk space by compacting segments
#info "Compacting repository"
#/usr/bin/borg compact
compact_exit=$?
# use highest exit code as global exit code
global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
global_exit=$(( compact_exit > global_exit ? compact_exit : global_exit ))
if [ ${global_exit} -eq 0 ]; then
info "Backup, Prune, and Compact finished successfully"
elif [ ${global_exit} -eq 1 ]; then
info "Backup, Prune, and/or Compact finished with warnings"
else
info "Backup, Prune, and/or Compact finished with errors"
fi
du -hs $BORG_REPO
exit ${global_exit}