[kwlug-disc] One distro, another kernel?

[Lori Paniak]

I'd try any/all kernel chimeras out in a (disposable) virtual machine
before trying it in real life.

Are you sure you don't just want to compile a driver module or two?

As Paul noted, I believe there have been great changes in udev since
2.6.18. I'm sure there have been plenty of other changes in the past
three/four years as well.



On Mon, 2010-04-12 at 12:47 -0400, Paul Nijjar wrote:
> On Mon, Apr 12, 2010 at 12:17:12PM -0400, Richard Weait wrote:
> > How wrong is this?
> > 
> > Could one, for example, run Ubuntu on a Centos kernel?
> 
> In principle, yes. I can think of two strategies to try this out: 
> 
> 0. Get the CentOS kernel sources that are patched with specific CentOS
> features. Then compile that kernel on your Ubuntu box with
> kernel-package. This will give you a .deb that you can install on your
> Ubuntu machine as a "custom" kernel. 
> 
> You could keep pace with the CentOS kernel tree as much as you wanted,
> but you would need to recompile that kernel every so often. 
> 
> Of course this is not EXACTLY a CentOS kernel, but it should be
> configured pretty closely to one. Maybe that is good enough for
> government work.
> 
> I guess you could try the "alien" utility to install the CentOS 
> .rpm files directly, but that sounds like a world of pain. 
> 
> 1. As Chris suggested, you could make a CentOS chroot environment. If
> you chroot into that environment you would be running the old Ubuntu
> kernel in the CentOS directory tree. That is not a perfect solution
> but it would illustrate some things that break right away. 
> 
> If your question was the other way around I would have recommended
> running debootstrap to generate a Ubuntu chroot. 
> 
> Five seconds of intense websearching gives me "Mock" as one
> possibility and "febootstrap" as another: 
> 
> http://fedoraproject.org/wiki/Extras/MockTricks
> http://rwmj.wordpress.com/2009/03/19/febootstrap-fedora-equivalent-of-debootstrap/
> 
> Things I would expect would break: udev stuff, RAID configurations,
> GRUB locations (especially if one system uses GRUB 2). 
> 

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