Op 16 apr. 2013, om 20:14 heeft Zbigniew Jędrzejewski-Szmek <[email protected]>
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!
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