Restic backup maintenance script, scheduled with a systemd timer rather than cron job.

restic-daily-maintenance.service

[Unit]
Description=Runs daily restic maintenance script

[Service]
Type=oneshot
ExecStart=/etc/restic/restic-maintenance-daily.sh
User=restic

restic-daily-maintenance.timer

[Unit]
Description=Run restic-daily-maintenance.service

[Timer]
Unit=restic-daily-maintenance.service
OnCalendar=*-*-* 02:35:00

[Install]
WantedBy=timers.target

restic-maintenance-daily.sh

#!/bin/bash

#: Title              : restic-init
#: Date               : July 15 2018
#: Author             : Matt Vance
#: Version            : 1.1
#: Description        : This will run Restic maintenance tasks
#: License            : MIT License (MIT)

# Copyright (C) 2019 Matthew Vance

export RESTIC_REPOSITORY=/Volumes/storage/matt/backup/repos/shared/
export RESTIC_PASSWORD_FILE=/etc/restic/restic-pw.txt

HOST=host_name
RESTIC=/usr/local/bin/restic
INCLUDE=/etc/restic/restic-include.txt
EXCLUDE=/etc/restic/restic-exclude.txt
LOG=/var/log/restic/restic.log
CACHE=/home/restic/.cache

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

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

# Check the repository for errors
$RESTIC check | tee -a $LOG

# Remove snapshots according to policy and remove unneeded data from the
# repository.
# It is more efficient to run forget just once in a 24-hour period and to
# run the prune command with it.
$RESTIC forget \
--prune \
--keep-last 3 \
--tag full \
--cache-dir $CACHE | tee -a $LOG

$RESTIC forget \
--prune \
--keep-daily 7 \
--keep-weekly 4 \
--keep-monthly 12 \
--keep-yearly 7 \
--keep-hourly 24 \
--cache-dir $CACHE | tee -a $LOG
# --keep-within 7y12m7d \

# Check the repository for errors
$RESTIC check | tee -a $LOG

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