RE: [Xen-users] using gpxe to get a VM image

["Dustin Henning" <Dustin.Henning@xxxxxxxxxxx>]

        You don't specify a root filesystem in an HVM domain, you specify a
boot device, and the bootloader on that device specifies the root filesystem
(in this case, the ISO would boot to PXE, and the PXE image would define
root).  Also, rtl8139 is the default emulated NIC in an HVM domU, hence that
driver suggestion.  If you want to use PV (or if you have to due to lack of
VT), hopefully someone else can respond with other ideas, as I would assume
that rom-o-matic doesn't include options to make a PV bootable ISO based on
the previous poster's suggestions.  It may not even be possible to boot via
PXE on a PV domain at all (unless by way of some other emulation layer being
executed by the PV guest), but I really don't know for sure.
        Dustin

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Luca
Sent: Thursday, March 26, 2009 22:25
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] using gpxe to get a VM image

Thanks.

One more question. How do I need to change the VM's configuration
file? So far I have always specified the kernel and the root
filesystem (which I would not have if I used gpxe)

Besides just a curiosity. Why do you suggest to use that particular
NIC (rtl8139)?  As it's going to be a VM can I use any NIC?

> I haven't tested this, but this would probably work or be the easiest way
> assuming you can create Xen HVM domU's:
>
> 1. Go to:
http://rom-o-matic.net/gpxe/gpxe-git/gpxe.git/contrib/rom-o-matic/
> 2. Choose NIC/ROM type: rtl8139:10ec8139 -- [10ec,8139]
> 3. Choose ROM output format: ISO bootable image (.iso)
> 4. Skip to Step #4, and hit "Get ROM" and it should create a file named
> "gpxe-git-rtl8139.iso" for you.
> 5. Use that as the bootable CD-ROM for the HVM install.
>
> This assumes you have a working PXE setup or something similar in your
> environment for netbooting.

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