[systemd-devel] Failed to register machine: Unit machine-test\x2dserver.scope already exists.

[Peter Paule]

Hi,

after killing a container started via "systemd-nspawn" I get the  
following error message:

   Failed to register machine: Unit machine-test\x2dserver.scope  
already exists.

Using google I found the following bug report:

   https://bugs.freedesktop.org/show_bug.cgi?id=68370

I'm running Arch Linux

   # uname -a
   Linux test1.ib.vrnetze.de 3.18.6-1-ARCH #1 SMP PREEMPT Sat Feb 7  
08:44:05 CET 2015 x86_64 GNU/Linux

And I've got systemd 219 installed from the [testing]-repository

   $ pacman -Qi systemd
   Name           : systemd
   Version        : 219-1
   Description    : system and service manager
   Architecture   : x86_64

I installed the dkr image by using "machinectl"

   $ sudo machinectl pull-dkr feduxorg/test-server --dkr-index-url  
https://index.docker.io --verify=no --force

I ran the dkr image by using "systemd-nspawn"

   # systemd-nspawn -xbM test-server

And killed the machine with "^]^]^]".

After that I am not able to start the machine again:

   # systemd-nspawn -bxM test-server
   Spawning container test-server on  
/var/lib/machines/.#test-server4f0158116691c25f.
   Press ^] three times within 1s to kill container.
   Failed to register machine: Unit machine-test\x2dserver.scope  
already exists.

When listing all machines, there is no machine

   # machinectl list
   MACHINE CLASS SERVICE

   0 machines listed.

I found the scope which is given in the error message, when using the  
"--all"-flag

   # systemctl list-units --all
   [...]
   machine-test\x2dserver.scope                                         
       loaded    inactive dead      Container test-server
   [...]

To get rid of that scope I needed to disable it

   systemctl disable machine-test\x2dserver.scope


Did I do something wrong or is it a bug in the kernel/systemd?

Thanks a lot.

/pp