[Lxc-users] RH and clones 6.2, LXC, SElinux and multiple DEVPTS instances

[Mauras Olivier]

Just tried and same problem "PTY allocation request failed on channel 0"

Cheers,
Olivier

On Tue, Mar 6, 2012 at 11:06 AM, Iliyan Stoyanov <ilf at ilf.me> wrote:

> **
> Hi Mauras,
>
> Do you by any chance have an fstab file in your container's /etc directory
> that is trying to mount devpts fs also. I had this issue a week ago with
> some of my SL6.2 containers on a fedora 16 host. After removing everything
> /dev/pts related from the fstab in the /etc directory of the containers,
> everything magically worked.
>
> BR,
> --ilf
>
>
> On Tue, 2012-03-06 at 10:54 +0100, Mauras Olivier wrote:
>
> Hello,
>
> I've finally successfully migrated my SMACK setup over SElinux to isolate
> my containers - Thanks to the folks on #selinux at freenode - on a
> Scientific Linux 6.2 host. (I may share my policy with some details if some
> of you are interested)
> So far so good, after loads of hits and misses almost everything works
> correctly.
>
> The only thing that is not, is the multiple devpts instances. It seems
> that when specifying "lxc.pts" option in the container config, ssh stops
> working while /dev/pts is correctly mounted _but_ is still showing pts
> devices from the host.
> There's no specific selinux avc denials, and ssh rejects the shell
> connection with that kind of errors found when /dev/pts is not correctly
> mounted:
>
> sshd[552]: error: ssh_selinux_setup_pty: security_compute_relabel: No such
> file or directory
> sshd[556]: error: ioctl(TIOCSCTTY): Operation not permitted
> sshd[556]: error: open /dev/tty failed - could not set controlling tty: No
> such device or address
>
> As you may guess /dev/tty is present and /dev/pts is correclty mounted as
> i can do: ssh root at container "ls -la /dev/pts"
> Only assigning the pts device for the shell doesn't...
>
>
> Have any of you also hit this problem? Did you find a solution?
>
>
> Regards,
> Olivier
>
>
> Ps: Using lxc 0.7.5
>
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