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systemd-container login as root no longer possible?

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  systemd-container login as root no longer possible? arne <sp113438@telfort.nl> - 2019-07-12 03:40 +0200
    Re: systemd-container login as root no longer possible? Ulf Volmer <u.volmer@u-v.de> - 2019-07-12 17:40 +0200
    Re: systemd-container login as root no longer possible? Michael Biebl <biebl@debian.org> - 2019-07-13 01:50 +0200
      Re: systemd-container login as root no longer possible? SOLVED arne <sp113438@telfort.nl> - 2019-07-13 14:40 +0200

#211261 — systemd-container login as root no longer possible?

After upgrading my containers from stretch to buster I can no longer
log in as root

I make the container with debootstrap, then 

# systemd-nspawn --directory=/mnt/mycontainer passwd

then I start the container with

# systemd-nspawn --register=yes -D /mnt/mycontainer /sbin/init &

then

# machinectl login mycontainer

gives me a login screen

When I enter "root"
no password prompt is shown


In stretch containers there is no problem, I get the password prompt
and can log in as root.

I tried with buster to make a new container on buster, can not log in.

Perhaps it is a new feature of systemd?

Lucky me, I had copies of my stretch containers.

Is this a bug or am I missing something?

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#211305

On 12.07.19 03:20, arne wrote:

> # machinectl login mycontainer
> 
> gives me a login screen
> 
> When I enter "root"
> no password prompt is shown

Did you checked /etc/securetty in your container? This is the most
common cause for this kind of error.

Best regards
Ulf

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#211324

[Multipart message — attachments visible in raw view] — view raw

Hi

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830255
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=731656

might be related.
Does it help if you add pts/0 to /etc/securetty inside your buster
container?
Would be great if you can report back if that fixes your issue.
If you want to use machinectl, you also need to have dbus installed
inside your container.

Interesting to see that /etc/securetty has apparently been removed just
recently. That change is unstable only, i.e. won't help you for a buster
container. See
https://tracker.debian.org/news/1042624/accepted-shadow-147-1-source-into-unstable/


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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#211345 — Re: systemd-container login as root no longer possible? SOLVED

On Sat, 13 Jul 2019 01:30:46 +0200
Michael Biebl <biebl@debian.org> wrote:

> Hi
> 
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830255
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=731656
> 
> might be related.
> Does it help if you add pts/0 to /etc/securetty inside your buster
> container?
> Would be great if you can report back if that fixes your issue.
> If you want to use machinectl, you also need to have dbus installed
> inside your container.
> 
> Interesting to see that /etc/securetty has apparently been removed
> just recently. That change is unstable only, i.e. won't help you for
> a buster container. See
> https://tracker.debian.org/news/1042624/accepted-shadow-147-1-source-into-unstable/
> 
> 

The bug was in securetty.

I added following to /etc/securetty

# systemd containers
pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
pts/6
pts/7
pts/8
pts/9


and everything works again.
I can log in as root several times.

Thanks Michael and Ulf!

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