Virt-install&Virt-manager at Xen 4.0 (2.6.32.12 pvops) Dom0 on top Ubuntu Karmic Koala Server

The final target of this post is to demonstrate how flexible is Ubuntu Karmic Koala Server environment. Build Xen 4.0 and the most recent stable pvops kernel 2.6.32.12 ( with DRM support). Loading Xen Instance followed by install Ubuntu’s Libvirt environment, providing utility virt-install for creating PV and HVM DomUs, virt-manager completely functional to manage any DomU been built via virt-install. Change-set 21112 from xen-4.0-testing.hg back ported to Xen 4.0 to support grub2 notation ‘(hd0,1)’ specific for Ubuntu 10.04 aka Lucid Lynx.

First install required packages:

apt-get install libcurl4-openssl-dev \
xserver-xorg-dev \
python2.6-dev \
mercurial gitk \
build-essential \
libncurses5-dev \
uuid-dev gawk \
gettext texinfo bcc \
bridge-utils iasl \
dpkg-dev debhelper fakeroot

Second – build Xen from source

# cd /usr/src

At this point creare grub2-fix.patch1 as raw content of http://xenbits.xensource.com/xen-4.0-testing.hg?rev/065efaec5e71 Changeset 21112 pygrub: Fix Grub2 support for Ubuntu 10.04

gunzip xen-4.0.0.tar.gz
tar -xvf xen-4.0.0.tar
cd xen-4.0.0
patch -p1 -s -i ../grub2-fix.patch1
make xen
make tools
make install-xen
make install-tools PYTHON_PREFIX_ARG=

Set up xend,xendomains to run as services

update-rc.d xend defaults 20 21
update-rc.d xendomains defaults 21 20

Now checkout and build 2.6.32.12 pvops kernel

cd /usr/src
git clone
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git linux-2.6-xen
cd linux-2.6-xen
git checkout -b xen/stable-2.6.32.x origin/xen/stable-2.6.32.x

Build kernel in Debian way

make menuconfig # Enabled the dom0 support and the Xen backends
make -j(x)number_of_kernels
chmod g-s /usr/src -R
make deb-pkg
dpkg -i ../linux-image*2.6.32.12*.deb
depmod 2.6.32.10
update-initramfs -c -k 2.6.32.12

One more notice regarding /etc/modules editing :-
In case configuring kernel (1)
<M> Xen /dev/xen/evtchn device
echo “xen-evtchn” >> /etc/modules
In case configuring kernel (2)
<*> Xen /dev/xen/evtchn device
/etc/modules shouldn’t be touched.

With config bellow there is no need to touch /etc/modules at all



At this point kernel is installed

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 9.10 ( vs F12 ). Thus you won’t be able to start xend in Dom0.
Add entry to /boot/grub/grab.cfg:-
menuentry “Xen 4.0 / Ubuntu 9.10 kernel 2.6.32.12 pvops” {
insmod ext2
set root=(hd1,8)
multiboot (hd1,8)/boot/xen.gz
module (hd1,8)/boot/vmlinuz-2.6.32.12 dummy=dummy root=/dev/sdb8 ro console=tty0
module (hd1,8)/boot/initrd.img-2.6.32.12
}
Reboot system and install libvirt environment :-
Two steps in procedure bellow make Xen default Hypervisor on Ubuntu 9.10.
First is commenting out (xend-unix-server yes) in /etc/xen/xend-config.sxp ,
second export variable export VIRSH_DEFAULT_CONNECT_URI=”xen:///”
in root’s .bashrc.
Then run:-
# apt-get install ubuntu-virt-server ubuntu-virt-mgmt
Now you should be able to install Ubuntu 10.04 Lucid Server HVM via virt-install :-

# virt-install -n LucidSRV -r 1024 --hvm --vnc -f /dev/sda8 -c /home/boris/Lucid.iso --debug

Create following XML LucidPVG-def.xml

<domain type='xen' id='1'>
<name>LucidPVG</name>
<uuid>118b9cb4-2ea5-daf6-abcd-710f3c7d2b8a</uuid>
<memory>2097152</memory>
<currentMemory>2097152</currentMemory>
<vcpu>2</vcpu>
<bootloader>/usr/local/bin/pygrub</bootloader>
<bootloader_args>-q</bootloader_args>
<os>
<type>linux</type>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/lib/xen/bin/qemu-dm</emulator>
<disk type='block' device='disk'>
<driver name='phy'/>
<source dev='/dev/sda8'/>
<target dev='xvda' bus='xen'/>
</disk>
<interface type='bridge'>
<mac address='00:16:3e:3f:79:01'/>
<source bridge='eth0'/>
<script path='/etc/xen/scripts/vif-bridge'/>
<target dev='vif1.0'/>
</interface>
<console type='pty' tty='/dev/pts/0'>
<source path='/dev/pts/0'/>
<target port='0'/>
</console>
<input type='mouse' bus='xen'/>
<graphics type='vnc' port='5900' autoport='yes'/>
</devices>
</domain>

Then define and start via virt-manager Lucid RC PV DomU
# virsh define LucidPVG-def.xml