On Tue, 16.04.13 20:59, Koen Kooi (k...@dominion.thruhere.net) wrote:
>
> Op 16 apr. 2013, om 20:14 heeft Zbigniew Jędrzejewski-Szmek
> <zbys...@in.waw.pl> het volgende geschreven:
>
> > On Tue, Apr 16, 2013 at 09:11:51AM +0200, Koen Kooi wrote:
> >> Hi,
> >>
> >> To help with flashing the onboard eMMC of a 100000 boards I'm using
> >> systemd-nspawn to run package postinstall scripts that generate UUIDs and
> >> some other things and it's working great for that! Every board now has a
> >> unique value in /etc/machine-id instead it being empty and systemd
> >> randomizing it on startup.
> >>
> >> What doesn't work however is something like this:
> >>
> >> systemd-nspawn -D ${PART2MOUNT} /usr/bin/timedatectl set-timezone
> >> Europe/Paris
> >>
> >> or this:
> >>
> >> systemd-nspawn -D ${PART2MOUNT} /usr/bin/hostnamectl set-hostname
> >> BeagleBoneBlack
> >>
> >> I know I can run the lowlevel 'ln -sf <zoneinfo> /etc/timezone' or echo
> >> the name into /etc/hostname, but I'd like to use the *ctl commands because
> >> they work and have error handling built-in.
> >> it looks like I would need -b to get the *ctl commands to work, but -b
> >> doesn't support running single commands and exiting.
> >>
> >> My goal is to be able to drop in a rootfs tarball and change timezone and
> >> hostname settings in a config file for the flasher script and avoid
> >> generating N different tarballs. For use in the office lab I use something
> >> like [1] to generate the hostnames based on board revision and serial
> >> number.
> >>
> >> So, is there a way to *ctl command using systemd-nspawn in a rootfs that
> >> wasn't specially prepared (e.g. helper units/targets) for that?
> >
> > With very recent systemd just run:
> >
> > PID=$(head -n1 /sys/fs/cgroup/systemd/machine/$NAME/system/tasks)
> > nsenter -m -u -i -n -p -t $PID /usr/bin/timedatectl set-timezone
> > Europe/Paris
> > ...
> > nsenter -m -u -i -n -p -t $PID systemctl halt
> >
> > where NAME is either speicified with -M or the name of the tree root.
>
> I'll update my util-linux to get nsenter and give that a try, thanks!
Well, you wouldn't known when the right time is to enter the
machine... After all you#d have to do that after the dbus socket is
established, otherwise your timedatectl will still fail...
Lennart
--
Lennart Poettering - Red Hat, Inc.
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