[Lxc-users] [lxc-attach error] Failed to open /proc/4468/ns/pid. Failed to enter namespace

[Frank Scholten]

frank at franktop:~$ uname -a
Linux franktop 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC
2012 x86_64 x86_64 x86_64 GNU/Linux

I thought setns was added in 3.0? I also have the setns man page. How
do I enable it? Do I have to compile a new kernel?

Cheers,

Frank

On Mon, Oct 15, 2012 at 6:25 PM, Serge Hallyn
<serge.hallyn at canonical.com> wrote:
> Quoting Frank Scholten (frank at frankscholten.nl):
>> Hi all,
>>
>> I am trying to run commands inside the container.
>>
>> Running lxc 0.7.5.1, commit 60a742e0afd from sourceforge.
>>
>> I created and started an Ubuntu container and when I run
>>
>> $ sudo lxc-attach -e -n test whoami
>>
>> I get
>>
>> 'Failed to open /proc/4468/ns/pid. Failed to enter namespace'
>>
>> Any idea what could be wrong?
>
> Your kernel does not support setns for pid.  /proc/$$/ns/pid
> does not exist.
>
> -serge
>