Virtualization using Xen on Ubuntu

April 14th, 2011 by Pawan Kumar Leave a reply »

Xen is the open source virtualization solution .This blog is about installing a new Xen server on Ubuntu 10.04. Also I have the composite window manager on top of the Xen! With full 3D pass4sure 1Z1-868 support! To achieve this I do: 1- Install your Ubuntu Desktop 10.4 and upgrade your system; 1.1 – Install some packages: aptitude install build-essential libncurses5-dev dpkg-dev pass4sure 70-298 debhelper fakeroot 2- Download and install a new kernel with dom0 pv_ops enabled: sudo -s cd /usr/src git clone git:// linux-2.6-xen cd linux-2.6-xen git pull git reset –hard git checkout -b xen/stable origin/xen/stable git pull 2.1 – Download the kernel config file attached to this mail (config-for-xen- Copy the config file to the kernel source dir: cp ~Downloads/config-for-xen- /usr/src/linux-2.6-xen/.config You can see the differences of my config file against the Lucid one: diff /boot/config-2.6.32-17-generic ~Downloads/config-for-xen- | vim – …both are close to each other. 2.2 Configure, compile and install: make menuconfig # Enable the dom0 support and the Xen backend/frontend/xenfs stuffs… make chmod g-s /usr/src -R # To avoid the error: “dpkg-deb: control directory has bad permissions 2755 (must be >=0755 and > /etc/modules Now you can try your new kernel without Xen, if you want, it should work smootly. 3- Download and install the latest Xen: Preparing your environment: apt-get build-dep xen-3.3 aptitude install uuid-dev iasl texinfo Download and compile: cd /usr/src hg clone -r 4.0.0-rc8 cd xen-unstable.hg make xen make tools make stubdom make install-xen make install-tools PYTHON_PREFIX_ARG= make install-stubdom update-rc.d xend defaults 20 21 update-rc.d xendomains defaults 21 20 4- Configuring your Grub2 through the file /etc/grub.d/40_custom: —- cut here —- #!/bin/sh exec tail -n +3 $0 # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the ‘exec tail’ line above. menuentry “Xen 4.0.0-rc8 / Ubuntu 10.4 kernel pvops” { insmod ext2 set root=(hd0,1) multiboot (hd0,1)/xen-4.0.0-rc8.gz dummy=dummy

module (hd0,1)/vmlinuz- dummy=dummy root=/dev/mapper/HyperDeskVG01-tcmc–dell–lucid ro module (hd0,1)/initrd.img- } —- cut here —- Don’t forget to change your “root=” option of your Linux! Run update-grub again: update-grub 5- Reboot into your new dom0! reboot 6- Look if your Xen is up and running xm list xm info .. if not: /etc/init.d/xendomains stop /etc/init.d/xend stop /etc/init.d/xend start /etc/init.d/xendomains start xm list xm info

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