Re: [Xen-users] Xen 3, LVM and FC4

[Andrew Ross <aross@xxxxxxxxxxxxxxxxxxxxxx>]

Andrew McConnell wrote:
> On 7/6/06, Andrew Ross <aross@xxxxxxxxxxxxxx> wrote:
> > I assume you've created a filesystem on the LV and have drivers for said
> > fs compiled into your domU kernel.
> I created an ext3 filesystem on the LV.  Whether ext3 drivers are
> compiled into the kernel is not something I can answer without some
> assistance but based on the output below, it looks like it's trying to
> use ext2 instead.
ext3 is simply ext2 with a journal, so ext3 volumes can be safely 
mounted as ext2 - you simply loose the benefit of the journal while the 
volume is mounted as ext2.
> Warning: unable to open an initial console.
This generally means you're missing /dev/console , which makes sense, 
since you have an empty filesystem.
> I'm guessing this is probably normal since there is nothing on the
> filesystem so it can't execute /sbin/init ???
Yep.

> Thanks for your help.  Can you point me to some documentation that
> will clarify the next steps?  I feel like I'm not catching on to
> something extremely important about this architecture...I was
> expecting to be able to go through a normal OS install upon successful
> creation of the new domain.
I don't really have any FC-specific experience, but my understanding is 
for paravirtualized guests you need to boostrap an initial system from 
dom0. For Gentoo domUs, the process is no different to a normal install, 
but for Debian you usually use debootstrap, and for rpm-based distros 
you can use rpmstrap.
You might want to try domi (http://dl.bytesex.org/cvs-snapshots/), which 
is a shell script frontend for xen domU creation - it can easily create 
xen domUs for a range of Linux distros.
Alternatively, I think the latest FC and SUSE setup programs support 
installing into locations other than /, which is probably the closest 
you'll get to a regular-style install.
Of course, with VMX (ie. unmodified) guests, I assume you simply boot 
the virtual machine from a CD image and run the installer as usual a la 
Qemu.
If you haven't already done so, check out the Xen Wiki 
(http://wiki.xensource.com/xenwiki/) - it contains howtos for a bunch of 
different domU distributions.
Cheers

--
Andrew Ross
IT Officer
Whitley College

Ph: (03) 9340 8008

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