Script to backup a Raspberry Pi weekly to a Restic over the network via REST.

restic-backup-weekly.sh

#!/bin/bash

#: Title              : restic
#: Date               : October 13, 2018
#: Author             : Matt Vance
#: Version            : 1.0
#: Description        : Script to run regular restic backups
#: License            : MIT License (MIT)

# Copyright (C) 2018 Matthew Vance

export RESTIC_REPOSITORY=rest:https://user:your_password@192.168.1.2:8889
export RESTIC_PASSWORD_FILE=/home/pi/.restic/restic-pw.txt

HOST=rasberry_pi
CACERT=/home/pi/.restic/host_server_name-bundle.pem
CACHE=/home/restic/.cache
EXCLUDE=/home/pi/.restic/restic-exclude.txt
INCLUDE=/home/pi/.restic/restic-include.txt
LOG=/home/pi/.restic/restic.log
RESTIC=/usr/local/bin/restic

#Define a timestamp function
timestamp() {
date "+%b %d %Y %T %Z"
}

# Add timestamp
echo "$(timestamp): restic.sh started" | tee -a $LOG
echo "-------------------------------------------------------------------------------" | tee -a $LOG

# Run Backups
$RESTIC backup \
--cacert $CACERT \
--cache-dir $CACHE \
--exclude-file $EXCLUDE \
--files-from $INCLUDE \
--host $HOST \
--quiet | tee -a $LOG

# Add timestamp
echo "-------------------------------------------------------------------------------" | tee -a $LOG
echo "$(timestamp): restic.sh finished" | tee -a $LOG
printf "\n" | tee -a $LOG

restic-weekly.service

[Unit]
Description=Runs weekly restic backup script

[Service]
Type=oneshot
ExecStart=/home/pi/.restic/restic-backup-weekly.sh
User=restic

restic-weekly.timer

[Unit]
Description=Run restic-weekly.service every Friday

[Timer]
Unit=restic-weekly.service 
OnCalendar=Fri *-*-* 08:25:00
# tell systemd to run the service immediately after booting if the server was 
# down when it was supposed to run
# Persistent=true

[Install]
WantedBy=timers.target