If you look at http://www.scienco.org/tag/xen/ you’ll find two guides for installing guests: one for FreeBSD and one for Ubuntu. And the one for FreeBSD can also be used if you want to install Windows.

Thank you for taking the time to write all of this down

I am trying to use 8.04.1 server to make this happen and found a few problems.

It seems lvm2 needs to be installed to get the pvcreate vgcreate lvmstore commands.

which I found out was:
(apt-get install lvm2)

The problem I am having is:

lvcreate -n lv1 -L 20G lvmstore

# lvcreate -n lv1 -L 20G lvmstore
/proc/misc: No entry for device-mapper found
Is device-mapper driver missing from kernel?
Failure to communicate with kernel device-mapper driver.
/proc/misc: No entry for device-mapper found
Is device-mapper driver missing from kernel?
Failure to communicate with kernel device-mapper driver.
Incompatible libdevmapper 1.02.20 (2007-06-15)(compat) and kernel driver
striped: Required device-mapper target(s) not detected in your kernel
lvcreate: Create a logical volume

# uname -a
Linux ubuntu 2.6.24-19-generic #1 SMP Wed Jun 18 14:43:41 UTC 2008 i686 GNU/Linux

I found the answer here:
http://ubuntuforums.org/showthread.php?t=689342

modprobe dm_mod
modprobe dm_mirror
modprobe dm_snapshot

Then:
# lvcreate -n lv1 -L 20G lvmstore
Logical volume “lv1″ created

Thanks for your comment!

Yes, you are able to set up Xen on a running system, although I would strongly recommend you not to! Normally it’s advised that you don’t use dom0 (the host running Xen) for any other things than being dom0.

Instead I would recommend you to start over, so to speak, and instead make your current software setup on a virtual machine, too. This of course requires you to be able to have some down time while configuring this net setup.

Regards,
Mikkel.

first of all congrats to those howto’s, they are absolutely well done and gave me some ideas …

i do have the ds3000 atm(had the ds7000 before), i am running Ubuntu Server 8.04 on it with some web projects and game servers running…

now, i would like to host a newer game server that is only aviable as a windows version, so i would like to run a virtual sys with winxp pro on it.
till now i did try vmware server, witch unfortunately had some very bad network lags(not an option for gaming) and i tried virtualbox, with what i am quite happy as it uses only very little on system resources, BUT: the vbox has the problem that it does not allow me to ping from host->guest and without that i cant administrate the game server our call statistical scripts etc. ….(i did search the web, tried allot of different howto’s and nothing fixed that small leftover problem since 4 days so far)

now my question:
Would it be possible to use your solution on a “running and setted up” server and use only the second hard drive(as its not used atm)?
If yes, would you be so kind and give me some pointers what i maybe consider to not screw up the running server?

your articles are somehow the last resource for me atm to fix my problem, as i already go insane on that

Thanks a million
Mario

Thanks for noting me, and please let me know how everything goes!

Sorry about your trouble.

Are you on a “clean” system? Are you sure that /etc/mdadm/mdadm.conf doesn’t already contain information about /dev/sdb11?

Regards .

i always get mdadm: /dev/sdb11 appears to be part of a raid array:
level=raid1 devices=2
help ! =-)