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

[Iliyan Stoyanov]

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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