Re: [Xen-users] Install from CD

[Luke Crawford <lsc@xxxxxxxxx>]

qemu works well, as many of the partition types that Xen supports are also 
supported by qemu.  Of course, the CD is unlikely to contain a Xen kernel, 
so after the install, you will need to install the modules and stuff.
here are some notes I made for a client that uses systemimager to manage 
their boxes;  With this they can install any of their existing 
systemimager images to a VBD partition. (with an OVERRIDES folder that 
adds the modules for the xen kernel and moves /lib/tls and stuff)
this way it each domU looks to have only one partition when viewed from 
the dom0, but from within the domU it has all the partitions systemimager 
made.
first, your install image must support one of the network adaptors 
exported by qemu, like the  NE2000  (or not use the network, that is fine 
as well.)
in my client's system, they were booting off a floppy that ran the 
systemimager stuff, so I use a floppy image, but QEMU has an option for 
adding a virtual cdrom drive as well.
I made the floppy image with dd if=/dev/fd0 of=floppy.img

Mount -oloop floppy.img /mnt/floppy

Edit /mnt/floppy/local.cfg

copy in new kernel

Umount /mnt/floppy


Boot the floppy with the following command on dom0:



qemu  -hda /dev/sda5   -no-kqemu -nographic    -fda floppy.img  -boot a
-net nic -net tap



where /dev/sda5 is the partition to install into (so in my disk section I 
would use phy:/dev/sda5)
to make networking work with qemu, you want a /etc/qemu-ifup that looks 
something like this
/sbin/modprobe tun

/sbin/ifconfig $1 promisc 0.0.0.0

/usr/sbin/brctl addif xenbr0 $1


On Tue, 19 Sep 2006, jonr@xxxxxxxxxx wrote:

> Date: Tue, 19 Sep 2006 09:22:38 -0800
> From: jonr@xxxxxxxxxx
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] Install from CD
>
> I have read some things that lead me to believe that I can do this. Do I need to
> make an iso image of the cd then loopback mount it and make a config file that
> points to the cdrom as the active partition? Is it even possible to do this and
> if it is, will I need to patch the kernel or just move the
> /lib/modules/2.<kernel> over to the new VM?
>
> Thanks for any help,
>
> Jon
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