Azaad Source

1. Download the CentOS 5.1 image from jailtime. http://jailtime.org/download:centos:v5.1

At the time of writing this howto the current image file name is: centos.5-1.20080125.img.tar.bz2

2. Untar the image:

# tar -xjf centos.5-1.20080125.img.tar.bz2

3. Create directories under /mnt to mount image your downloaded from jailtime and in our case lvm parition.

# mkdir /mnt/img
# mkdir /mnt/vm

4. Mount jailtime image and lvm partition image.

# mount -o loop centos.5-1.img /mnt/img
# mount /dev/vg/ComC /mnt/vm

5. Copy the image files to our VM image i.e on lvm parition.

# cp -a /mnt/img/* /mnt/vm/

6. Configure IP for domU. I don’t think I need to explain this step.

cat /mnt/vm/etc/sysconfig/network-scripts/ifcfg-eth0

TYPE=Ethernet
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.1.10
NETMASK=255.255.255.0
GATEWAY=192.168.1.254

7. Configure domU hostname.

[root@aag ~]# cat /mnt/vm/etc/sysconfig/network

NETWORKING=yes
HOSTNAME=complay

8. For me the xm console never worked until I have used this line in /mnt/vm/etc/inittab, I hope you know where to put following line in /mnt/vm/etc/inittab, other wise learn about inittab first please.

1:2345:respawn:/sbin/mingetty console

9. root logins are not allowed on default jailtime image, so if you need them you can enable them too, or if you change your SSH port to something unusual you can do that too in /mnt/vm/etc/ssh/sshd_config change following:

Port 2023

PermitRootLogin yes

10. Unmount both images.

# umount /mnt/img /mnt/vm

11. Create initrd image for your domU

# mkinitrd /boot/xen-guest-initrd `uname -r` --with xenblk --with xennet --preload xenblk --preload xennet

12. Create a xen config file, as I was using LVM partition so my config file will look bit different.

My domU config file looks like following:
[root@aag xen]# cat complay.cfg

kernel = “/boot/xen-vm-kernel”
ramdisk = “/boot/xen-guest-initrd”
name = “complay”
memory = “128″
disk = [ 'phy:vg/ComC-swap,sda2,w', 'phy:vg/ComC,sda1,w' ]
vif = [ 'mac=00:14:d1:3e:F9:f1', ]
root = “/dev/sda1 rw”
vcpus=1
on_reboot = ‘restart’
on_crash = ‘destroy’

13. Start your domU

# xm create -c /etc/xen/complay.cfg

14. You will see a nice login prompt like following:

CentOS release 5 (Final)
Kernel 2.6.18-8.1.14.el5xen on an i686

complay login:

15. Login as root, default root password for jailtime image is “password”
16. Change your root password first
17. Enter nameservers in /etc/resolv.conf
18. Now this small CentOS 5.1 image likes many usefult softwares, few of which I really like and need I will install here. If you don’t find your favourite software you know how to install it right?

# yum -y install logwatch postfix vim-enhancd iptables anacron

19. Now your VM is ready to be used.

Possible Errors

If you get following Error:

Error: destroyDevice() takes exactly 3 arguments (2 given)

Make sure you have unmounted your image: umount /mnt/vm