Xen users - Apr 2006 - Running other distros as domu under FC5/Xen 3.x

Hi

With great help from the members of this list I got FC5 and Xen 3.x (tar ball
binaries) running on my system.

I have FC5 installed on /dev/sda6, OpenSUSE installed on /dev/hdc3 and Ubuntu on
/dev/hdc1.  I am trying to get Ubuntu and Suse to run within my FC5/Xen box.

The configuration file I use is : /etc/xen/suseguest (contents)

kernel = "/boot/vmlinuz-2.6.16-xen"

memory = 100

name = "suseguest"

vif= [''mac=aa:00:10:00:00:10, bridge=xenbr0, ip=192.168.2.2'']

gateway = "192.168.1.1"

netmask = "255.255.255.0"

disk = [''phy:hdc3,hdc3,w'']

# disk = [''file:/dev/hdc3,hdc3,w'']

root = "/dev/hdc3 rw"


On running /usr/sbin/xm create -c /etc/xen/suseguest I get a number of errors on
module load that modules.dep file is not found etc .. however the boot process
continues uninterrupted and Iam finally provided the terminal login prompt. 
After logging in, however an ifconfig reveals that the virtual if 192.168.2.2 is
not setup .. only loopback is enabled (127.x.x.x) ..

I tried ubuntuguest (same config as above, disk is /dev/hdc1) but with the same
result.

(Note that this config was working earlier with FC4 and Xen 2.x without issues)

All help to get this resolved is appreciated

Regards
Srini

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On Sun, Apr 16, 2006 at 06:06:29PM +0800, Srinivasan S
wrote:
> On running /usr/sbin/xm create -c /etc/xen/suseguest I get a number of
errors on module load that modules.dep file is not found etc .. however the boot
process continues uninterrupted and Iam finally provided the terminal login
prompt.  After logging in, however an ifconfig reveals that the virtual if
192.168.2.2 is not setup .. only loopback is enabled (127.x.x.x) ..
Log into your new guest and run depmod -a, that should create any needed files.
(You might need to create a /lib/modules/your_kernel_version folder, but run
depmod first just to check.)

The unixshell VM I have and all of the VMs I run at home have the IP configured
internally to the VM. I have no idea what the vif line for my unixshell account
looks like, but my home machines just have vif = [ '''' ]

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Andrew Thompson
http://aktzero.com/

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Hi Andrew

I tried as you suggested .. but since 2.6.16-xen does not exist under Suse
depmod complained and when I created the dir and reran depmod it just created
empty files (since there are no modules anyway I guess) ..

Qn:  Should I install Xen also under the guest (domU) OSs and then try running
them from within FC ?

Cheers
Srini
> ----- Original Message -----
> From: "Andrew Thompson" <andrewkt@aktzero.com>
> To: "Srinivasan S" <ssrini@linuxmail.org>
> Subject: Re: [Xen-users] Running other distros as domu under FC5/Xen 3.x
> Date: Sun, 16 Apr 2006 12:21:35 +0000
> 
> 
> On Sun, Apr 16, 2006 at 06:06:29PM +0800, Srinivasan S wrote:
> > On running /usr/sbin/xm create -c /etc/xen/suseguest I get a 
> > number of errors on module load that modules.dep file is not 
> > found etc .. however the boot process continues uninterrupted and 
> > Iam finally provided the terminal login prompt.  After logging 
> > in, however an ifconfig reveals that the virtual if 192.168.2.2 
> > is not setup .. only loopback is enabled (127.x.x.x) ..
> 
> Log into your new guest and run depmod -a, that should create any 
> needed files. (You might need to create a 
> /lib/modules/your_kernel_version folder, but run depmod first just 
> to check.)
> 
> The unixshell VM I have and all of the VMs I run at home have the 
> IP configured internally to the VM. I have no idea what the vif 
> line for my unixshell account looks like, but my home machines just 
> have vif = [ '''' ]
> 
> --
> Andrew Thompson
> http://aktzero.com/
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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On Sun, Apr 16, 2006 at 08:35:30PM +0800, Srinivasan S
wrote:
> Hi Andrew
> 
> I tried as you suggested .. but since 2.6.16-xen does not exist under Suse
depmod complained and when I created the dir and reran depmod it just created
empty files (since there are no modules anyway I guess) ..
Now that you''ve created the base modules directory, that particular
error shouldn''t show up any more.

If you plan to use any modules that you''ve compiled, copy the
/lib/modules/your_kernel_name>/kernel folder from your dom0 to your domU and
rerun depmod. I *think* that should allow modprobe to find and load them. (Some
help here if I''m wrong, please. I generally compile what I need into
the kernel and ignore modules.)

-- 
Andrew Thompson
http://aktzero.com/

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Hi Andrew

I already tried this .. sure I do not have any errors but my networking is not
working still .. only loopback is on when I check with an ifconfig

Can any one help on how to get this running ?  I need it urgently for a test
situation that will come up in a couple of days time

Regards
Srini
> ----- Original Message -----
> From: "Andrew Thompson" <andrewkt@aktzero.com>
> To: "Srinivasan S" <ssrini@linuxmail.org>
> Subject: Re: [Xen-users] Running other distros as domu under FC5/Xen 3.x
> Date: Sun, 16 Apr 2006 14:18:21 +0000
> 
> 
> On Sun, Apr 16, 2006 at 08:35:30PM +0800, Srinivasan S wrote:
> > Hi Andrew
> >
> > I tried as you suggested .. but since 2.6.16-xen does not exist 
> > under Suse depmod complained and when I created the dir and reran 
> > depmod it just created empty files (since there are no modules 
> > anyway I guess) ..
> 
> Now that you''ve created the base modules directory, that
particular
> error shouldn''t show up any more.
> 
> If you plan to use any modules that you''ve compiled, copy the 
> /lib/modules/your_kernel_name>/kernel folder from your dom0 to your 
> domU and rerun depmod. I *think* that should allow modprobe to find 
> and load them. (Some help here if I''m wrong, please. I generally 
> compile what I need into the kernel and ignore modules.)
> 
> --
> Andrew Thompson
> http://aktzero.com/
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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I found a reference to xennet as a possible issue why this may happen (eth0 not
showing up)
http://lists.xensource.com/archives/html/xen-users/2006-04/msg00498.html

The solution is apparently to add : 

"alias eth0 xennet" to /etc/modprobe.conf

Can someone on the list confirm if this is the case ?  (I do not have access to
my system right now but will have to call and instruct someone to do it, so am
checking up before hand.  apologies)

Regards
Srini
>Hi Andrew
>I already tried this .. sure I do not have any errors but my networking is
not
>working still .. only loopback is on when I check with an ifconfig
>
>Can any one help on how to get this running ?  I need it urgently for a test
>situation that will come up in a couple of days time
>Regards
>Srini
> ----- Original Message -----
> From: "Andrew Thompson" <andrewkt@xxxxxxxxxxx>
> To: "Srinivasan S" <ssrini@xxxxxxxxxxxxx>
> Subject: Re: [Xen-users] Running other distros as domu under FC5/Xen 3.x
> Date: Sun, 16 Apr 2006 14:18:21 +0000
> 
> 
> On Sun, Apr 16, 2006 at 08:35:30PM +0800, Srinivasan S wrote:
> > Hi Andrew
> >
> > I tried as you suggested .. but since 2.6.16-xen does not exist 
> > under Suse depmod complained and when I created the dir and reran 
> > depmod it just created empty files (since there are no modules 
> > anyway I guess) ..
> 
> Now that you''ve created the base modules directory, that
particular
> error shouldn''t show up any more.
> 
> If you plan to use any modules that you''ve compiled, copy the 
> /lib/modules/your_kernel_name>/kernel folder from your dom0 to your 
> domU and rerun depmod. I *think* that should allow modprobe to find 
> and load them. (Some help here if I''m wrong, please. I generally 
> compile what I need into the kernel and ignore modules.)
> 
> --
> Andrew Thompson
> http://aktzero.com/
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>


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On Mon, Apr 17, 2006 at 01:27:38PM +0800, Srinivasan S
wrote:
> Hi Andrew
> 
> I already tried this .. sure I do not have any errors but my networking is
not working still .. only loopback is on when I check with an ifconfig
One last response, then it''s out of my league:

Have you tried bringing up the interface manually? Mine don''t just
magically appear, I configure and bring them up exactly as I would for a real
system.

-- 
Andrew Thompson
http://aktzero.com/

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