Re: [Xen-users] want to install Ubunto domU on CentOS dom0 - do I use FV or PV?

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Christopher Isip wrote:
> On Sun, Jul 27, 2008 at 2:27 PM, Mark Williamson 
> <mark.williamson@xxxxxxxxxxxx <mailto:mark.williamson@xxxxxxxxxxxx>> 
> wrote:
>     You could do a fully virtualised install using virt-manager very
>     easily.  You
>     should be able covert to a PV install later, if you want.
>
>     Alternatively, you can build an ext3 filesystem for the guest
>     manually (inside
>     and image or partition).  You can then use the debootstrap tool to
>     build a
>     Debian/Ubuntu filesystem inside that.
>
>     Cheers,
>     Mark
>
>     On Friday 25 July 2008, Rudi Ahlers wrote:
>     > Hi all
>     >
>     > I want to install Ubuntu (which is debian based) on top of
>     CentOS, but
>     > since it's not a nativa RH based distro, I don't know which way to
>     > install it. Do I install it as fully virtualized , or
>     paravirtualized ?
>     >
>     > What is better in this case?
>
>
>
>     --
>     Push Me Pull You - Distributed SCM tool
>     (http://www.cl.cam.ac.uk/~maw48/pmpu/
>     <http://www.cl.cam.ac.uk/%7Emaw48/pmpu/>)
>
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>
> Here's how I created a Ubuntu domU in Centos dom0:
> dd if=/dev/zero of=/vm/Ubuntu-Hardy-base.img bs=1024k count=4000
> dd if=/dev/zero of=/vm/Ubuntu-Hardy-swap.img bs=1024k count=400
> /sbin/mkfs.ext3 /vm/Ubuntu-Hardy-base.img
> /sbin/mkfs.ext3 /vm/Ubuntu-Hardy-swap.img
> /sbin/mkswap /vm/Ubuntu-Hardy-swap.img
> chmod 640 /vm/Ubuntu*
> mkdir /mnt/xenfs
> mount -o loop /vm/Ubuntu-Hardy-base.img /mnt/xenfs
>  wget 
> ftp://ftp.muug.mb.ca/mirror/fedora/epel/5/x86_64/debootstrap-1.0.7-2.el5.noarch.rpm
>  rpm -Uvh debootstrap*
> export PATH=$PATH"/usr/sbin":/sbin  (so chroot will not fail)
> /usr/sbin/debootstrap --arch i386 
> --include=linux-image-2.6.24-16-generic,linux-image-2.6.24-16-xen,linux-ubuntu-modules-2.6.24-16-xen,linux-image-xen,libc6-xen,grub 
> --components=main,universe,multiverse hardy /mnt/xenfs 
> http://mirror.3fl.net.au/ubuntu/
> WAIT..................
>
> chroot /mnt/xen or just make xure all edits go to /mnt/xenfs/ from 
> this point on:
>  mv /lib/tls /lib/tls.disabled
>
> create /edit /etc/fstab
>
> proc            /proc           proc    defaults        0       0
> /dev/hda1       /               ext3    defaults,errors=remount-ro 
> 0       1
> /dev/hda2       none            swap    sw              0       0
>
>
> # mkdir -p /boot/grub
> # update-grub
>
> edit /boot/grub/menu.lst
>
> title           Ubuntu 8.04, kernel 2.6.24-16-xen
> root            (hd0,0)
> kernel          /boot/vmlinuz-2.6.24-16-generic root=/dev/xvda1 ro 
> console=xvc0
> initrd          /boot/initrd.img-2.6.24-16-xen
>
> title           Ubuntu 8.04, kernel 2.6.24-16-xen (recovery mode)
> root            (hd0,0)
> kernel          /boot/vmlinuz-2.6.24-16-xen root=/dev/xvda1 ro single 
> console=xvc0
> initrd          /boot/initrd.img-2.6.24-16-xen
>
> # cd /etc/event.d
> # cp tty1 xvc0
> # sed -i -e "s/tty1/xvc0/g" xvc0
>
> Add xvc0 to /etc/securetty to allow root to login
>
> # update-rc.d -f hwclockfirst remove
> # update-rc.d -f hwclock remove
> # rm /etc/udev/rules.d/85-hwclock.rules
>
>
> Now download the updated linux-image and headers from 
> http://www.il.is.s.u-tokyo.ac.jp/~hiranotaka/ 
> <http://www.il.is.s.u-tokyo.ac.jp/%7Ehiranotaka/>
> and install them, otherwise no network when you boot the domU
>
> Create our guest config file :
> bootloader = '/usr/bin/pygrub'
> memory = 512
> name = "Ubuntu-Hardy-Base"
> disk = 
> ['file:/vm/Ubuntu-Hardy-base.img,hda1,w','file:/vm/Ubuntu-Hardy-swap.img,hda2,w']
> vif = [ '' ]
>
> Boot the domU.
>
> Hope this helps
>
> Chris
Hi Chris,

Your example helps a lot, but I can't complete it.

When I try and download the "updated linux-image and headers from 
http://www.il.is.s.u-tokyo.ac.jp/~hiranotaka/ 
<http://www.il.is.s.u-tokyo.ac.jp/%7Ehiranotaka/>" - I get a 404 page 
error. Is there anywhere else that I can download it from?
I also can't start the domU, I get the following error:

xm create anya
Using config file "/etc/xen/anya".
Error: (2, 'Invalid kernel', 'xc_dom_find_loader: no loader found\n')


This is the xen config file:
cat /etc/xen/anya
bootloader = '/usr/bin/pygrub'
memory = 512
name = "anya"
disk = ['phy:/dev/backup/anya,ioemu:hda1,w']
vif = [ '' ]


Can you please help?

--

Kind Regards
Rudi Ahlers

Check out my technical blog, http://blog.softdux.com for Linux or other 
technical stuff


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