[one-users] network boot with xen

[Michaël Van de Borne]

The even longer answer is a question : "Do you really need this ?"

 >> Well, my objective is to install VM from empty virtual storage, as 
one usually do with kickstart. So I'd like to install an OS from 
scratch, according to details that would be generated into a script. If 
there are better ways than PXE/DHCP/TFTP/kickstart to achieve this, I'm 
open :)

anyway I'll try your advices.

thank you


Michaël Van de Borne
R&D Engineer, SOA team, CETIC
Phone: +32 (0)71 49 07 45 Mobile: +32 (0)472 69 57 16, Skype: mikemowgli
www.cetic.be, rue des Frères Wright, 29/3, B-6041 Charleroi
--
Jeudi 26 mai 2011 à 16h, ne manquez pas l'événement
des 10 ans du CETIC: "Des entreprises plus compétitives
grâce à l'ICT... découvrez comment et surtout pourquoi!"
Programme et inscriptions sur www.cetic.be


Le 20/05/11 10:11, Vivien Bernet-Rollande a écrit :
> On 19/05/2011 16:02, Michaël Van de Borne wrote:
>> Can anyone tell me how to get a DHCP request sent from the booting VM?
>>
> Hi.
>
> The short answer is "you can't simply do that out of the Box".
>
> The long answer is "you can make it happen if you dig in".
>
> I know a bit about how things work on the Xen side. Not quite sure 
> about how it integrates with Open Nebula though. A good starting point 
> is this : http://zhigang.org/files/docbook/xen-pxeboot.html
>
> Basically, if you're using Xen for HVM, you may use a boot="n" 
> parameter, to tell qemu-dm to perform a PXE boot. I suppose you would 
> specify this as a RAW parameter in the VM template.
>
> If you're using PV, things are slightly more complex. First you need 
> to get pypxeboot (http://grid.ie/pypxeboot/), which is a pxe 
> bootloader for xen. Then you need your VM to use that bootloader. Your 
> domain config should contain something like :
>
> bootloader="/usr/bin/pypxeboot"
> vif=['mac=AA:00:86:e2:35:72']
> bootargs=vif[0]
>
> I'm guessing you could pass something like :
> OS = [BOOTLOADER = /usr/bin/pypxeboot]
> RAW = [bootarg = 'mac=AA:00:86:e2:35:72' ]
>
> And it should work. Pure speculation though, I haven't tested it.
>
> The even longer answer is a question : "Do you really need this ?". 
> I'm not sure what you're trying to do, but it can probably be done 
> using template images, contextualisation and maybe a bit of scripting. 
> Virtualization is a powerful tool, offering new posibilities, and it's 
> worth thinking if we really need to carry those old PXE concepts into 
> IaaS.
>