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|
#!/bin/bash
#
# Borg script for home folder backups.
# Adapted from https://borgbackup.readthedocs.io/en/stable/quickstart.html#automating-backups
#
# Example config to be put at ~/.config/borger/destination-name:
#
# # Backup destination
# export SSH_SERVER="user@host"
# export SSH_PORT="2202"
#
# # Repository path
# export BORG_REPO_DIR="/var/backups/users/$USER/borg"
# export BORG_REPO="ssh://$SSH_SERVER:$SSH_PORT/$BORG_REPO_DIR"
#
# # Setting this, so you won't be asked for your repository passphrase:
# #export BORG_PASSPHRASE='HACKME'
# #export BORG_PASSCOMMAND='pass show backup'
# #export BORG_PASSCOMMAND='keyringer default decrypt pessoal/backups/borg 2> /dev/null'
#
# # Backup config
# keepdaily="7"
# keepweekly="4"
# keepmonth="3"
# encryption="keyfile"
# Parameters
BASENAME="`basename $0`"
DESTINATION="$1"
BASE_CONFIG="$HOME/.config/borger"
CONFIG="$BASE_CONFIG/$DESTINATION"
HOSTNAME=`cat /etc/hostname`
# Some helpers and error handling:
info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
fatal() { info $*; exit 1; }
# Ensure we have our base config folder
mkdir -p $BASE_CONFIG
# List available targets
if [ -z "$DESTINATION" ]; then
echo "usage: $BASENAME <destination> [--check]"
echo -n "available destinations from $BASE_CONFIG: "
ls $BASE_CONFIG
exit 1
fi
# Ensure we have an username
if [ -z "$USER" ]; then
USER="`whoami`"
fi
# In case your home folder is a symlink
if [ ! -z "`readlink $HOME`" ]; then
ORIG="`readlink $HOME`"
else
ORIG="$HOME"
fi
# Default backup config
keepdaily="7"
keepweekly="4"
keepmonth="3"
encryption="keyfile"
# Config
if [ -e "$CONFIG" ] ; then
source $CONFIG
else
fatal "No such config $CONFIG"
fi
# Setting this, so the repo does not need to be given on the commandline:
if [ -z "$BORG_REPO" ]; then
export BORG_REPO_DIR="/var/backups/users/$USER/borg"
export BORG_REPO="ssh://$SSH_SERVER:$SSH_PORT/$BORG_REPO_DIR"
fi
# Check
if [ "$2" == "--check" ]; then
borg list
exit $?
fi
# Our trap
trap 'info $( date ) Backup interrupted >&2; exit 2' INT TERM
# Initialize
if ! ssh $SSH_SERVER -p $SSH_PORT test -f $BORG_REPO_DIR/config; then
info "Initializing borg repository at $BORG_REPO..."
borg init --encryption=$encryption $BORG_REPO
init_exit=$?
if [ "$init_exit" != "0" ]; then
fatal "Error initializing repository"
fi
fi
# Backup the most important directories into an archive named after
# the machine this script is currently running on:
info "Starting backup..."
borg create \
--verbose \
--filter AME \
--list \
--stats \
--show-rc \
--compression lz4 \
--exclude-caches \
::'{now}' \
$ORIG
backup_exit=$?
if [ "$backup_exit" != "0" ]; then
fatal "Error creating snapshot"
fi
info "Pruning repository..."
# Use the `prune` subcommand to maintain 7 daily, 4 weekly and 6 monthly
# archives of THIS machine. The '{hostname}-' prefix is very important to
# limit prune's operation to this machine's archives and not apply to
# other machines' archives also:
borg prune \
--list \
--show-rc \
--keep-daily $keepdaily \
--keep-weekly $keepweekly \
--keep-monthly $keepmonthly \
prune_exit=$?
if [ "$prune_exit" != "0" ]; then
fatal "Error pruning repository"
fi
# use highest exit code as global exit code
#global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
#
#if [ ${global_exit} -eq 1 ];
#then
# info "Backup and/or Prune finished with a warning"
#fi
#
#if [ ${global_exit} -gt 1 ];
#then
# info "Backup and/or Prune finished with an error"
#fi
#
#exit ${global_exit}
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