In fact, no one has written one! It's supposed to be ran by hand. This kind of dulls things, since a server ought to be able to be brought back online and it should "just work" with little human intervention. So, I'm a bit of a perfectionist when it comes to making things work just right, out of the box.
Creating service files for systemd is not very difficult. I just used another .service file as a template to work from.
The only other type of service file that I could find was a CentOS oriented control file, and by the looks of it, someone didn't realize that you could run MRTG in daemon mode and not have to worry about rerunning the process every so often. Still, it was helpful to remember that daemonizing isn't always the necessary way.
[Unit]
Description=Multi Router Traffic Grapher
After=network.target
[Service]
PIDFile=/run/mrtg/mrtg.pid
User=mrtg
Group=mrtg
ExecStart=/usr/lib/systemd/scripts/mrtg.sh
ExecReload=/usr/bin/kill -USR2 $MAINPID
KillSignal=SIGQUIT
KillMode=mixed
[Install]
WantedBy=multi-user.target
You'll notice that I generated a shell script to handle actually starting the daemon. I was getting errors while trying to load an environment variable into it, so I set it to run its own process:
#!/bin/sh LANG=C /usr/bin/mrtg --pid-file=/run/mrtg/mrtg.pid --user=mrtg --group=mrtg --daemon /srv/http/mrtg/html/mrtg.cfg
Create /run/mrtg:
# mkdir /run/mrtg
Set the appropriate permissions:
# chown mrtg.mrtg /run/mrtg
When all is said and done, MRTG will run in the background, unattended, and produce beautiful graphs in Arch Linux.
