Setup Xen 3.4.1 Dom0 on top of Ubuntu 9.04 Server via Marc – A. Dahlhaus’s UDEV patch

Per Marc – A. Dahlhaus:-
Udev removed the udevinfo symlink from versions higher than 123 and xens build-system could not detect if udev is in place and has the required version. In particular, Ubuntu 9.04 server has udev version
141 and appears to be affected by this issue. Straight forward Xen 3.4.1 build brings up Xen Host with hotplug scripts rejecting to work.
The recent patch suggested by Marc resolves this problem. It doesn’t
happen on F11 due to

[root@ServerXen341 /]# ls -l /usr/bin/udevinfo
lrwxrwxrwx. 1 root root 18 2009-06-12 14:13 /usr/bin/udevinfo -> ../../sbin/udevadm
[root@ServerXen341 /]# /usr/bin/udevinfo -V
the program '/bin/bash' called '/usr/bin/udevinfo', it should use 'udevadm info ', this will stop working in a future release
141

Brief description of Xen 3.4.1 build follows bellow. First – install on Uubuntu 9.04 Server all packages required for Xen build:-

apt-get install libcurl4-openssl-dev \
xserver-xorg-dev \
python2.6-dev \
mercurial gitk \
build-essential \
libncurses5-dev \
uuid-dev gawk \
gettext texinfo bcc

Second step :-

# cd /usr/src
# hg clone http://xenbits.xensource.com/xen-3.4-testing.hg
# cd xen-3.4-testing.hg
Set in Config.mk
PYTHON = python
PYTHON_PREFIX_ARG =

Tuning Config.mk results Xen packages to be placed into /usr/local/lib/python2.6/dist-packages due to Changeset 19594 in xen-3.4-testing.hg. Otherwise, Xen packages would go to /usr/lib/python2.6/site-packages, which is not default location for python 2.6 on Ubuntu 9.04 ( vs F11 ). Thus you won’t be able to start xend in Dom0. Same thing happens when building Xen Unstable on Ubuntu 9.04 Server.

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Update on 07/01/09 . View changeset 19668
“Fix buildsystem to detect udev > version 124”.
Patching is no longer needed
***************************************************************
Now build Xen 3.4.1 from source :-

# make install-xen
# make install-tools
# make install-stubdom

************************************************************
Updated on 10/05/09 due to changes in JF’s Git Repo
************************************************************
Install pvops enabled kernel 2.6.31.1 from Jeremy Fitzhardinge git repository. Checkout the most recent branch:-

# git clone git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git linux-2.6-xen
# cd linux-2.6-xen

Make sure your your current branch is xen/master

# git branch

Setup Xen Dom0 Support

# make menuconfig










Now build kernel

# make -j(x)(number_of_kernels)
# make modules_install install
# mkinitramfs -o /boot/initrd-2.6.31.1.img 2.6.31.1

Add entry to /boot/grub/menu.lst:-

title Xen 3.4 / Ubuntu 9.04 kernel 2.6.31.1
uuid 34d2c0bd-fe30-47e0-990e-4921caf1e845
kernel /boot/xen-3.4.gz
module /boot/vmlinuz-2.6.31.1 root=/dev/sdb2 ro console=tty0
module /boot/initrd-2.6.31.1.img


Final step is Setup VNC at Dom0 to be able to manage Xen Dom0 with PVOPS kernel remotely via vinagre or vncviewer

Different option is to install xenified kernel 2.6.30.2 via download :-
wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.30.2.tar.bz2
and applying Andrew Lyon’s rebased patches set

# wget http://gentoo-xen-kernel.googlecode.com/files/xen-patches-2.6.30-3.tar.bz2

followed by building 2.6.30.2 xenified kernel

# make menuconfig
# make -j(x)(number_of_cores)
# make modules_install install
# mkinitramfs -o /boot/initrd-2.6.30.2.img 2.6.30.2


Remote vinagre console











The most recent screen shots for Xen 3.4.1-rc10 Dom0 with 2.6.31-rc4 pvops kernel on top of Ubuntu 9.04 Server