Re: [Xen-users] /dev/pts errors under xen

[Daniel Goertzen <goertzen@xxxxxxxx>]

Adam Carheden wrote:

> I'm using Xen as a development enviornment for Gentoo AMD64 cluster. I
> have a master node and two slave nodes, all DOMU. All are using the
> same kernel, but when I try to log on to the slave nodes via SSH, the
> client hangs and the server reports
>
> Jan  4 17:14:17 64node02-test sshd[10238]: Accepted publickey for root
> from 10.1.10.206 port 48333 ssh2
> Jan  4 17:14:19 64node02-test sshd[10238]: error: openpty: No such
> file or directory
> Jan  4 17:14:19 64node02-test sshd[10238]: error: session_pty_req:
> session 0 alloc failed
> Jan  4 17:14:19 64node02-test sshd(pam_unix)[11264]: session opened
> for user root by (uid=0)
>
> I can log on successfully via a xen console or using ssh
> `64node01-test bash -i`, so the problem is with the slave nodes
> allocating /dev/pts/X.
>
> - The actual cluster (non-xen) works fine.
> - I've tried openssh 3.9_p1-r2 and 4.2_p1 (both Gentoo) with the same results
> - The slaves and master are using the same xen kernel.
> - The problems happens both with my xenU kernel and my xen0 kernel.
> - The master and slaves are (in theory) identical except that the
> slaves boot from an nfs share on the master (i.e. I use 'root =
> "root=/dev/nfs ro"' as opposed to disk = [ nfs:...] in my xen config
> file)
> - Both the master and slaves report devpts in mount:
>    devpts on /dev/pts type devpts (rw)
>
> Any one have any hints for me?
>
> Thanks
> --
> Adam Carheden
>
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>
>
>  
I was going to suggest that your kernel is not set up right for pts, but 
then I read you do have devpts mount properly.  Here is my kernel config 
anyway for Filesystems->Pseudo Filesystems:
[ ] /dev file system support (OBSOLETE)
[*] /dev/pts Extended Attributes
[*]   /dev/pts Security Labels

Gentoo switched from devfs to udev not too long ago and it tripped up a 
lot of people, myself included.
As a datapoint for you, my gentoo AMD64 xen installation does not have 
these pty problems.
Regards,
Dan.


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