Re: [Xen-users] Xen 3.1.4: HVM Configuration

["Omer Khalid" <Omer.Khalid@xxxxxxx>]

Hello Sadique,

Thanks for your tip; i tried it by putting console=ttyS0 in the kernel line of HVM guest but the result is still the same. When I launch the guest with xm create -c or do xm console id, then after couple of space tabs- the console hangs. I can come out of it by Cntrl-]. It seems that its trying to retrieve the serial output but not getting as its not complaining any more about the xenconsole not configured properly...

Any more ideas? Due to lack of console/vnc, I am not able to debug why the network is not working for the VM as i cant SSH into. The problem could be either the network is not properly configured or the hvm guest never boots up....but to verify that I need the console access :-(((

Cheers

Omer

On Fri, Aug 22, 2008 at 9:36 AM, Sadique Puthen <sputhenp@xxxxxxxxxx> wrote:

Omer Khalid wrote:
> Hi Todd,
>
> I tried both xvc0 and hvc0 but it didn't work! I kept on getting the
> same message "xenconsole: Could not read tty from store: No such file
> or directory".
>
> But when I put <serial='pty'> in the vm config file; then the console
> seems to start but hangs...And the only way out is Cntrl-].
>
> By looking at the xen mail archives, it seems that HVM based VM suffer
> from this problem. Unfortunately, I don't have the VNC for this
> machine other wise i could have accessed the console through it.
>
> Additionally, I also tried the following combinations in the vm config
> file:
>
> <console="/dev/console">, <console="/dev/tty1">, <console="/dev/ttyS0">

Try serial='pty' in the hvm config file and append "console=ttyS0" to
the kernel line of the hvm guest, not in the vm config file.

--Sadique

>
> I also tried the above combinations with the modifications to
> /etc/inittab file for getty:
>
> co:2345:respawn:/sbin/agetty <ttyS0><console> 9600
>
> But no luck :((((
>
> Any ideas?
>
> Cheers
> Omer
>
> On Thu, Aug 21, 2008 at 8:06 PM, Todd Deshane <deshantm@xxxxxxxxx

> <mailto:deshantm@xxxxxxxxx>> wrote:
>
>     On Thu, Aug 21, 2008 at 12:12 PM, Omer Khalid
>     <Omer.Khalid@xxxxxxx> wrote:
>     > Hi,
>     > I manage to configure my xen 3.1.4 HVM installation and launch
>     the VM but
>     > "xm console <id>" seem not to work! I have a HVM Linux guest
>     running. The
>     > error I get is following:
>     > xenconsole: Could not read tty from store: No such file or directory
>     > Is some thing missing in my configuration?
>
>     How is your Linux guest setup?
>
>     You will need the appropriate console specified on the kernel
>     command line...
>
>     hvc or xvc, I forget which is which at the moment, but you should
>     be able to
>     search the mailing list archives for that (try xen.markmail.org

>     <http://xen.markmail.org>)

>     (One is for the older xen linux kernels and one is for the
>     mainline xen linux
>     kernels)
>
>     You will also want to make sure that the linux guest has the xen
>     console support
>     in it.
>
>     Hope that helps,
>     Todd
>
>     --
>     Todd Deshane
>     http://todddeshane.net
>     check out our book: http://runningxen.com
>
>
>
>
> --
> Omer
>
> -------------------------------------------------------
> CERN -- European Organization for Nuclear
> Research, IT Department, CH-1211,
> Geneva 23, Switzerland
>
> Phone: +41 (0) 22 767 2224
> Fax: +41 (0) 22 766 8683
> E-mail : Omer.Khalid@xxxxxxx
> Homepage: http://cern.ch/Omer.Khalid

> ------------------------------------------------------------------------
>
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--
Omer

-------------------------------------------------------
CERN -- European Organization for Nuclear
Research, IT Department, CH-1211,
Geneva 23, Switzerland

Phone: +41 (0) 22 767 2224
Fax: +41 (0) 22 766 8683
E-mail : Omer.Khalid@xxxxxxx
Homepage: http://cern.ch/Omer.Khalid

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