Re: systemd gpsd does not start on boot

[Philippe Clérié <philippe@gcal.net>]

On 10/25/2015 01:52 PM, Michael Biebl wrote:
> Am 25.10.2015 um 12:59 schrieb Philippe Clérié:
> > On 10/23/2015 05:33 PM, Philippe Clérié wrote:
> > > I'm running raspbian jessy on a rpi2 with an Adafruit GPS board. Gpsd
> > > refuses to load on boot, but works just fine on manual start.
> > >
> > > I am not yet familiar with systemd. Even if I've had to dig a bit to try
> > > to understand how it works I'm still stumped at the moment, so I don't
> > > know if there's a bug or I am doing something wrong.
> > >
> > > There are 3 systemd units related to gpsd in /lib/systemd/system.
> > >
> > > gpsd.service
> > > gpsd.socket
> > > gpsdctl@.service
> > >
> > > My (weak) understanding is that systemd will start .socket which in turn
> > > will launch .service. That does not seem to be happening.
>
> Well, was there actually a request over the socket /var/run/gpsd.sock
> which would trigger the start of the service?
>
> If there is no such request from a client, the service will not be
> started. The maintainer of gpsd apparently has setup gpsd so it is
> started on-demand and apparently there is no demand from a client.

Looks like he did half the job then. I'm pretty sure my ntp daemon works 
over /run/gpsd.sock. I'm also pretty sure nothing queries gpsd over the 
local tcp socket on port 2947.

> > For what it's worth:
> >
> > Edit /lib/systemd/system/gpsd.service:
> >
> > [Install]
> > + WantedBy=multi-user.target
> > Also=gpsd.socket
> >
> > Then:
> >
> > sudo systemctl enable gpsd.service
> > sudo reboot
> >
> > And gpsd gets loaded.
> >
> > I don't know if it is the correct fix but that seems to work.
>
>
> Editing files in /lib/systemd/system/gpsd.service is not a good idea,
> since they will be overwritten on the next package update.
>
> It's better to make a copy of that file as
> /etc/systemd/system/gpsd.service and make your changes there, or simply
> extend the service file with the desired changes using a drop-in snippet:
>
> mkdir /etc/systemd/system/gpsd.service.d/
> echo -e "[Install]\nWantedBy=multi-user.target" >
> /etc/systemd/system/gpsd.service.d/local.conf
>
> You can pick the names of that conf file as you like.

Just read something about that. I had planned on looking into it 
sometime this week. Thanks for the tip.


> systemd in testing/unstable has a nice shortcut here:
> Try systemctl edit foo.service (creates a drop-in in /etc)
> or systemctl edit --full foo.service (creates a full copy in /etc)


--
Philippe

------
The trouble with common sense it that it is so uncommon.
<Anonymous>