[lxc-users] user 'ubuntu' does not exist within LXD container

[Francesco Longo]

Thanks for your reply. It seems that if I put a sleep after container
creation _sometimes_ it works. Probably, I have to play with the delay.

Is there a correct way to do that? I mean, is there a way to execute a set
of commands inside the container after the container has properly booted? I
guess that I could use cloud-init but that means it would work only in
ubuntu images right?

Francesco


On Thu, Mar 23, 2017 at 12:32 PM, Simos Xenitellis <
simos.lists at googlemail.com> wrote:

> On Thu, Mar 23, 2017 at 12:41 PM, Francesco Longo <flongo at unime.it> wrote:
> > Hi all,
> > I'm playing with Raspberry Pi virtualization, i.e., in few words,
> creating
> > LXD containers on top of a Raspberry Pi and attaching to them a couple of
> > FUSE filesystems mirroring the GPIO /sys/class/gpio filesystem.
> >
> > I created a simple script that you can find here:
> > https://github.com/flongo82/raspberry_virtualization/blob/
> master/launch_virtual_rasp.sh
> >
> > A first issue I'm dealing with is that when using lxc exec to add the
> ubuntu
> > user to the gpio groups it says that the ubuntu user does not exist.
> But, if
> > I login into the container the user is actually there but, of course, it
> is
> > not part of the gpio group given that the command has failed.
> >
> > This is the output of the script:
> >
> > Creating virtual rasp test!
> > Creating test
> > Starting test
> > Adding group `gpio' (GID 1000) ...
> > Done.
> > usermod: user 'ubuntu' does not exist
> > Device gpio added to test
> > Device devices added to test
> >
> > Any idea why this is happening? Is it possible that I need to wait a
> while
> > before issuing this kind of lxc exec command after creating the
> container?
>
> You can look into the image at /var/lib/lxd/images/
> and you will verify that the "ubuntu" account is not preinstalled in the
> image.
> In there you can see that there exist cloud-init templates that do things
> like creating users. My quick look did not show which template creates
> the "ubuntu" user,
> so have a better look in there.
> "cloud-init" runs after the container is created, therefore it makes
> sense is the "ubuntu" account
> is not available exactly after the exit for "lxc launch".
>
> Simos
>
> >
> > I'm using LXD version 2.12 on top of a
> > ubuntu-16.04-preinstalled-server-armhf+raspi3.img.xz image.
> >
> > Thanks,
> > Francesco
> >
> > --
> > ------------------------------------------------------------
> ------------------
> > Dr. Francesco Longo, PhD
> > Assistant Professor
> > Dipartimento  di Ingegneria
> > Università degli Studi di Messina
> > address: Contrada di Dio (S. Agata), 98166, Messina, Italy
> > email: flongo at unime.it
> > phone: +39 090 3977335 --- fax: +39 090 3977471
> > ------------------------------------------------------------
> ------------------
> >
> > _______________________________________________
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> > http://lists.linuxcontainers.org/listinfo/lxc-users
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-- 
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Dr. Francesco Longo, PhD
Assistant Professor
Dipartimento  di Ingegneria
Università degli Studi di Messina
address: Contrada di Dio (S. Agata), 98166, Messina, Italy
email: flongo at unime.it
phone: +39 090 3977335 --- fax: +39 090 3977471
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