[Unit]
Description=Backup with restic to Backblaze B2
# Email on failure require special setup. See README.md
#OnFailure=status-email-user@%n.service
# Prevent backup on unmetered connection. Needs special setup. See README.md.
#Requires=nm-unmetered-connection.service
#After=nm-unmetered-connection.service

[Service]
Type=simple
Nice=10
# $HOME or $XDG_CACHE_HOME must be set for restic to find /root/.cache/restic/
Environment="HOME=/root"
# pipefail: so that redirecting stderr from the script to systemd-cat does not hide the failed command from OnFailure above.
# Random sleep (in seconds): in the case of multiple backup profiles. Many restic instances started at the same time could case high load or network bandwith usage.
# `systemd-cat` allows showing the restic output to the systemd journal
ExecStart=/bin/bash -c 'set -o pipefail; ps cax | grep -q restic && sleep $(shuf -i 0-300 -n 1); source {{ INSTALL_PREFIX }}/etc/restic/%I.env.sh && {{ INSTALL_PREFIX }}/bin/restic_backup.sh 2>&1 | systemd-cat'