[ptxdist] systemd configuration

[ptxdist] systemd configuration

[Matthias Klein]

Hello,

I try to evaluate systemd as busybox init replacement on an ARM board 
where we mount the root filesystem read-only.

I got the system booting into a console with only one error:

● kmod-static-nodes.service - Create list of required static device 
nodes for the current kernel
    Loaded: loaded (/lib/systemd/system/kmod-static-nodes.service; static)
    Active: failed (Result: exit-code) since Thu 1970-01-01 00:00:08 
UTC; 46min ago
   Process: 71 ExecStart=/bin/kmod static-nodes --format=tmpfiles 
--output=/run/tmpfiles.d/kmod.conf (code=exited, status=203/EXEC)
  Main PID: 71 (code=exited, status=203/EXEC)

Warning: Journal has been rotated since unit was started. Log output is 
incomplete or unavailable.


I don't have a /bin/kmod on my target. We are using busybox insmod etc. 
where no /bin/kmod is installed.
For me it looks like the kmod-static-nodes.service is not needed. How 
can I disable it in the ptxdist project?

What is the right way to configure / adjust which uints and targets 
systemd will start?
Normally this all done at runtime using systemctl, but how can this be 
done "offline" / during creation of the root filesystem by ptxdist?


Best regards,
Matthias


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Re: [ptxdist] systemd configuration

[Michael Olbrich]

Hi,

On Sun, Nov 23, 2014 at 10:08:18PM +0100, Matthias Klein wrote:
> I try to evaluate systemd as busybox init replacement on an ARM
> board where we mount the root filesystem read-only.
> 
> I got the system booting into a console with only one error:
> 
> ● kmod-static-nodes.service - Create list of required static device
> nodes for the current kernel
>    Loaded: loaded (/lib/systemd/system/kmod-static-nodes.service; static)
>    Active: failed (Result: exit-code) since Thu 1970-01-01 00:00:08
> UTC; 46min ago
>   Process: 71 ExecStart=/bin/kmod static-nodes --format=tmpfiles
> --output=/run/tmpfiles.d/kmod.conf (code=exited, status=203/EXEC)
>  Main PID: 71 (code=exited, status=203/EXEC)
> 
> Warning: Journal has been rotated since unit was started. Log output
> is incomplete or unavailable.
> 
> 
> I don't have a /bin/kmod on my target. We are using busybox insmod
> etc. where no /bin/kmod is installed.
> For me it looks like the kmod-static-nodes.service is not needed.
> How can I disable it in the ptxdist project?

Just mask the service:
$ systemctl mask kmod-static-nodes.service
or create the symlink this creates to the image.

> What is the right way to configure / adjust which uints and targets
> systemd will start?
> Normally this all done at runtime using systemctl, but how can this
> be done "offline" / during creation of the root filesystem by
> ptxdist?

This is really a systemd questions. Systemd has multiple ways to do this
persistently. It's just a bunch of symlinks that you can create offline.
Check the systemctl documentation for mask/unmask enable/disable.

Michael

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