• Retrieve Xen version and install package

apt-cache search xen-hypervisor
apt-get install xen-hypervisor-4.x-amd64

• Check if Xen has been integrated to grub

grep Xen /boot/grub/grub.cfg

• Specify dedicated CPUs and memory for dom0 in /etc/default/grub :

I prefer not to restrict memory for dom0, let's allocate only one CPU :

GRUB_CMDLINE_LINUX="apparmor=0"
GRUB_CMDLINE_XEN="dom0_max_vcpus=1 dom0_vcpus_pin"

• Launch update-grub

• Reboot

• Check if Xen kernel has been loaded on boot

xm list

• Comment and uncomment those lines in /etc/xen/xend-config.sxp

#(vif-script vif-bridge)
#(vif-script     vif-route)
(network-script network-nat)
(vif-script     vif-nat)

• Launch /etc/init.d/xen restart

• Create a 32 bits virtual machine

xen-create-image --lvm=datavg --size=4G --memory=256M --swap=256M --dist=wheezy --mirror=http://ftp.fr.debian.org/debian --force --ip=192.168.1.1  --netmask=255.255.255.0 --gateway=192.168.1.254 --hostname=wheezy32bits --kernel=/boot/vmlinuz-3.2.0-4-686-pae --initrd=/boot/initrd.img-3.2.0-4-686-pae --arch=i386 --fs=ext4

kernel and initrd files can be retrieved here :

• kernel : vmlinuz-3.2.0-4-686-pae
• initrd : initrd.img-3.2.0-4-686-pae

/etc/xen/wheezy32bits.cfg

#
# Configuration file for the Xen instance wheezy32bits, created
# by xen-tools 4.3.1 on Sun Feb  9 16:25:13 2014.
#

#
#  Kernel + memory size
#
kernel      = '/boot/vmlinuz-3.2.0-4-686-pae'
ramdisk     = '/boot/initrd.img-3.2.0-4-686-pae'

vcpus       = '1'
cpus        = '1,2,3'
memory      = '256M'

#
#  Disk device(s).
#
root        = '/dev/xvda2 ro'
disk        = [
                  'phy:/dev/datavg/wheezy32bits-disk,xvda2,w',
                  'phy:/dev/datavg/wheezy32bits-swap,xvda1,w',
              ]


#
#  Physical volumes
#


#
#  Hostname
#
name        = 'wheezy32bits'

#
#  Networking
#
vif         = [ 'ip=192.168.1.1 ,vifname=vif1.1' ]

#
#  Behaviour
#
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'

• with console :

xm create wheezy32bits.cfg -c

• without console :

xm create wheezy32bits.cfg

• dom0 firewall rules : firewall
• VMs firewall rules : firewall.VM