Re: [Xen-users] Xen on RHEL 5.1 to para-virt Ubuntu Gusty

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> > I typically use an HVM install (full virtualisation) of Ubuntu onto RHEL
> > initially, since this is convenient and well supported by the
> > virt-manager tool.  I then convert this into a paravirtualised install if
> > I want at a later date.  This is an approach I quite like.
>
> Sound nice because I already have a full virtualized Ubuntu on RHEL at the
> moment. How did you switch to paravirt? Do you just install the Ubuntu Xen
> kernel and reboot?

Almost that, yeah.

Installed the Ubuntu Xen kernel, then I had to shut down and modify the domain 
config.  I'm using flat file configs and with these you need to properly 
shutdown and recreate the domain in order for config file changes to have an 
effect.

The config modifications change the builder argument to "linux" rather than 
hvm and deleted the "kernel=" line because it was no longer needed.  I may 
also have added bootloader="/usr/bin/pygrub" but I don't think this is 
actually necessary.

That's all i can think of for the moment, but I've probably missed something 
or other.  It was fairly simple all the same though.

I've occasionally pondered modifying the Xen tools to make it possible (and 
easy) to "dual boot" between PV and HVM modes.  Do you think this would be 
useful?

> Allright, in a second time, I will check out the debootstrap method, I'm
> already aware about it because I tried Xen on Ubuntu'Dom0 ;) I just have
> to install debootstrap on RHEL : I will test this at the end of the week.
> Thanks & Merry christmas to everybody ;)

debootstrap compiles and runs on non-Debian systems so this should work for 
you.  It probably won't configure things quite as nicely / completely as 
using the full Ubuntu installer and then converting would have done but it 
ought to get to an install in the end (fingers crossed) and it is quite 
convenient.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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