Synology DiskStation configuration backup

Synology_backup.sh

#!/bin/ash
#
# Synology DiskStation configuration backup
# Must be run as root
# Tested on 
#    DSM 6.1.6-15266 Update 1 - MARVELL Armada XP MV78230 (DS214+)
#
# Author: Alain Wolf <alain@alainwolf.ch> - https://gist.github.com/alainwolf/
# Date/Version: 2018-04-22/1.5
#

# Abort on errors
set -e

#
# Filename of the configuration backup
FILE_NAME="$( hostname )"
#
# OpenPGP key ID for encryption (must be already present in keyring)
PGP_KEYID="0x0123456789ABCDEF"
#
# Where to store the encrypted configuration backup file
TARGET_DIR="/volume1/NetBackup/$( hostname )/SynologyDS"
#
# GnuPG Home Directory of the user runnung this script
GNUPGHOME="/root/.gnupg"
#
# --- Do not change anything below this line! ---
#
backup_file="${FILE_NAME}_$( date +%F_%H-%M-%S-%Z ).dss"
temp_dir=$(mktemp --directory )

echo
echo "Starting backup of Synology DiskStation configuration on $( hostname )"
echo

# Tell the Synology DiskStation to create a configuration backup
/usr/syno/bin/synoconfbkp export --filepath="${temp_dir}/${backup_file}"
#echo "Synology DiskStation configuration exported to ${backup_file} on ${SOURCE_HOST}."

# Encrypt
echo "Encrypting archive with OpenPGP key ${PGP_KEYID}"
gpg --homedir ${GNUPGHOME} --batch --trust-model always --recipient ${PGP_KEYID} \
    --output "${TARGET_DIR}/${backup_file}.pgp" \
    --encrypt "${temp_dir}/${backup_file}"
echo "Encrypted file saved to ${TARGET_DIR}/${backup_file}.pgp"

# Clean up
echo "Cleaning up ${temp_dir}."
rm -rf "${temp_dir}"

# Success
echo
echo "Backup completed. Have a nice day."
echo