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Re: [Xen-users] Am I running under Xen?
- To: "Matthew Haas" <haas@xxxxxxxxxxxxxx>
- From: "Todd Deshane" <deshantm@xxxxxxxxx>
- Date: Sun, 2 Mar 2008 22:21:44 -0500
- Cc: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Sun, 02 Mar 2008 19:22:19 -0800
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On Sun, Mar 2, 2008 at 10:01 PM, Matthew Haas < haas@xxxxxxxxxxxxxx> wrote:
Tom Horsley wrote:
> Is there a standard idiom most folks use to ask the
> question: Am I a linux that was just booted under Xen?
>
> I'm thinking about fooling with some of my alternate
> boot partitions so they can be booted as paravirt
> VMs, but they'd need to do a bit of reconfiguring
> of themselves when running under Xen early in the boot
> process (like not trying to mount other partitions
> that are gonna be used by other virtual machines
> and use a different host name, and don't start so many
> system services, etc).
>
> I suppose I could just check and see if the kernel
> name has "xen" in it, but I just wondered if there
> was one true way to ask this question.
>
This is actually a question I've also found myself asking... I've got
a couple custom-built Debian packages that unroll various configurations
onto VMs, dom0s, and regular machines... I find myself writing in all
sorts of weird checks to try and determine what it is (and always am
finding new loopholes that I need to close).
If there is a nice guaranteed way of detecting a Paravirtualized domU
(or if the machine is acting as a dom0), I would also be interested in
knowing (basing it off strings in the kernel name isn't necessarily 100%
guaranteed).
-Matthew
--
Matthew Haas
Visiting Instructor
Corning Community College
Computer & Information Science
http://lab46.corning-cc.edu/haas/home/
"Writing should be like breathing;
It is one of those important things we do." -- me
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