Re: [Xen-users] Clear definitions

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Petersson, Mats wrote:
> [snip]
>   
> > >       
> > Let´s go for a practical example. Assume i´m using SLES10 and booting
> > the Xen kernel that comes with the distribuition. Right? Let´s go
> > ahead. I don´t like too much the yast way of doing things but let´s
> > use it now. I create a virtual machine, the only option available is
> > "paravirtualization" because i don´t have VT or V as processor. I will
> > not lie now and tell you that i did install an unmodified linux OS
> > (say stock Fedora). But i´ve read reports of people doing it. You
> > said: "To run unmodified (any OS), you'll need a processor that has
> > AMD-V or Intel VT.". I know i´m missing something here, as soon as i
> > discover what is this "miss" i´ll probably head in the right
> > direction. I´m afraid i still in need of some guidance :) and the
> > question that arose is: wich is true on the above? i will NOT be able
> > to install Fedora? or i WILL be able to run un unmodified OS, contrary
> > to what you said?
> >     
> Ok, let's take a step back and discuss what I mean by "unmodified". 
>
> I'm pretty sure some people (for example XenSource, Virtual Iron, SuSE, RedHat/Fedora) have developed tools that allow you to install a guest from the base-install media (or at least that will help you through part of that process). [Of course, whether those tools allow you to install a Fedora image with SuSE tools or SuSE image with Fedora tools is a different matter - I don't know the answer to this]. 
>
> However, if you don't have AMD-V or Intel VT on the processor, the kernel used in such an installation MUSST be one that uses a MODIFIED kernel. That is, a kernel that is specifically built to talk to Xen, rather than the kernel that you'd use for bare-metal (the hardware without Xen). This is what's meant by "modified" vs. "unmodified". The unmodified uses exactly the same binary image as you'd use on "bare-metal", which means that no special kernel is needed. 
>
> With the virtualization extensions, you can just take the installation CD/DVD 
> and set the virtual machine to say:
> Your CD/DVD is this (either the physical device or an ISO-image). 
> Your Hard-disk is this (a file, logical volume or physical device)
> And off you go and install it, just like you would on bare-metal - the only difference is the fact that your "console" is a window instead of the full screen. 
>   
Has anyone done PXE installations on DomU setups, rather than inserting 
the disk (or mounting an ISO, always lots of fun too!)
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users