Continued draft development

roles/independent-auto-usb-backup/README.md

@@ -4,3 +4,4 @@ This tool role allows to make an automatic backup to an usb stick
 ## More information
 - https://unix.stackexchange.com/questions/67464/how-to-get-uuid-for-a-usb-drive
 - https://unix.stackexchange.com/questions/65891/how-to-execute-a-shellscript-when-i-plug-in-a-usb-device
+- https://askubuntu.com/questions/25071/how-to-run-a-script-when-a-specific-flash-drive-is-mounted

roles/independent-auto-usb-backup/templates/usb-auto-backup.service.j2

@@ -0,0 +1,7 @@
+[Unit]
+Description=delete old backups
+OnFailure=systemd-email@%n.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/python {{docker_backups_cleanup}}backups-cleanup.py --backups-folder-path {{backups_folder_path}} --maximum-backup-size-percent {{size_percent_maximum_backup}}

roles/independent-auto-usb-backup/templates/usb-auto-backup.timer.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=starts usb-auto-backup.service
+
+[Timer]
+OnCalendar={{on_calendar_usb_auto_backup}}
+RandomizedDelaySec={{randomized_delay_sec}}
+Persistent=true
+
+[Install]
+WantedBy=timers.target