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Systemd timers and services

Systemd timers and service files can be found in the share/ directory. The following is here:

- FULL, DIFF and INC backups 
- Scheduled cleanups of old archives
- Alert sent on upcoming FULL & DIFF backups.
- Cleanups of old DIFFs and INCs, veryday on 21:07

The files are ready to be copied by the user to "~/.config/systemd/user"

Grandfather, father, son backup strategy

I use a variation of the grandfather-father-son backup strategy. The setup of backups detailed below is fitting for me, given the the current speed of changes to my filesystems.

It is very easy to change the installed timers into a different variation of the backup strategy. I encourage you to always view the timer setup, as described below, after changes.

The timers have been setup like this:

- FULL backup on December 30 10:03:00
- DIFF backups on the first day of a month (including Jan) 19:03:00
- INC backups starting on the fourth day of a month 19:03:00, repeating every 3 days

Installation

  • Copy the "share/.timers" & "share/.service" to ~/.config/systemd/user/
  • install the files in systemd
cp <dar-backup>/share/*.timer ~/.config/systemd/user/ 
cp <dar-backup>/share/*.service ~/.config/systemd/user/ 
systemctl --user enable dar-backup.timer
systemctl --user start  dar-backup.timer

systemctl --user enable dar-diff-backup.timer
systemctl --user start  dar-diff-backup.timer

systemctl --user enable dar-inc-backup.timer
systemctl --user start  dar-inc-backup.timer

systemctl --user enable alert-upcoming-full-backup.timer
systemctl --user start  alert-upcoming-full-backup.timer

systemctl --user enable alert-upcoming-diff-backup.timer
systemctl --user start  alert-upcoming-diff-backup.timer

systemctl --user enable dar-cleanup.timer
systemctl --user start  dar-cleanup.timer


systemctl --user daemon-reload
  • verify your timers are listed, and that the "NEXT" time is correct for each timer
systemctl --user list-timers

View systemd status

Do this to view systemd status for your services

systemctl --user status dar-backup.service
systemctl --user status dar-diff-backup.service
systemctl --user status dar-inc-backup.service

View systemd log

  • View systemd messages for the FULL service
journalctl --user -u dar-backup.service
  • View systemd messages for a time period for the FULL service
journalctl --user -u dar-backup.service --since "2022-04-13 08:00:00"  --until "2022-04-13 09:00:00"

Example: run INC service & tail journal

This example shows how to start the systemd "dar-inc-back.service" and view the status messages showing up in the systemd journal

systemctl --user start dar-inc-backup.service

journalctl --user -n 50 -f -u dar-inc-backup.service

Systemd documentation