[systemd-devel] stopping a systemd-nspwan container

[Kashyap Chamarthy]

On Sat, Mar 22, 2014 at 04:35:19PM +0200, Kevin Wilson wrote:
> Hello,
> 
> I had created a container according to systemd-nspwan man page and
> ran it by:
> systemd-nspawn -D/srv/mycontainer
> 
> I killed it by  pkill systemd-nspaw (and not by poweroff from within the
> container).
> 
> Now, running "machinectl" shows that the container still runs:
> machinectl
> MACHINE                          CONTAINER SERVICE
> mycontainer                      container nspawn
> 
> 1 machines listed.
> 
> but the following is strange:
> 
> Running:
> systemd-nspawn -D/srv/mycontainer
> gives:
> Spawning namespace container on /srv/mycontainer (console is /dev/pts/2).
> Init process in the container running as PID 2305.
> Failed to register machine: File exists
> Container failed with error code 239.
> 
> (and running it again gives the same result but with a different pid
> number).
> 
> Is there a way to shut down the container which is running in such a
> scenario ?

Hmm, I'm able to shut it down gracefully. I frequently do package builds
in systemd-nspawn.

Reading your email, I did this below test:

On one terminal:

    $ systemd-nspawn -D /srv/testcontainer
    Spawning container testcontainer on /srv/testcontainer. Press ^] three
    times within 1s to abort execution.


On another terminal, invoke machinectl:

    $ machinectl 
    MACHINE                          CONTAINER SERVICE         
    testcontainer                    container nspawn          
    
    1 machines listed.


Kill the systemd-nspawn process:

    $ pkill systemd-nspawn 


At this point, on the other terminal you see KILL signal invokcation:

    [. . .]
    -bash-4.2# 
    Container testcontainer terminated by signal KILL.
    $ 


Invoke machinectl again:

    $ machinectl 
    MACHINE                          CONTAINER SERVICE         
    
    0 machines listed.

    $ machinectl status testcontainer
    Could not get path to machine: No machine 'testcontainer' known
    $ 


Versions:

    $ uname -r; rpm -q systemd
    3.13.4-200.fc20.x86_64
    systemd-210-7.fc21.x86_64


-- 
/kashyap