Somebody wrote a puppet module that installs an app (mokey). Running the puppet agent shows it creates the systemd unit file and restarts the app. Every time
root@jeemoi:~# puppet agent -t
Notice: .../Systemd::Unit_file[mokey.service]/File[/etc/systemd/system/mokey.service]/ensure: created (corrective)
...
Notice: .../Systemd::Unit_file[mokey.service]/Service[mokey.service]: Triggered 'refresh' from 2 events
Notice: Applied catalog in 3.26 seconds