Le blog de Jean David TECHER, un Réunionnais à Saint-Priest/Lyon

Je connais parfaitement cette manipulation mais à chaque changement de noyau, faut s'y retrouver pour cette option. Rien ne vaut de belles screenshots pour s'en rappeler bien qu'on puisse farfouiller le fichier .config

Privé de ce support, les domU sous Windows sans le support tun/tap ne bootent pas

make menuconfig

On installe cdrdao

apt-get install cdrdao

Vérifier si le CD est déjà mounté

root@gemini:~# mount
/dev/sda2 on / type ext3 (rw,errors=remount-ro)
... ...
... ...
gvfs-fuse-daemon on /home/david/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=david)
/dev/sr0 on /media/NOUVEAU type iso9660 (rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500)

Si oui alors le démounter

root@gemini:~# umount /media/NOUVEAU/

Un scan pour trouver le deveice

root@gemini:~# cdrdao scanbus
Cdrdao version 1.2.2 - (C) Andreas Mueller 
  SCSI interface library - (C) Joerg Schilling
  Paranoia DAE library - (C) Monty

Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables.

Using libscg version 'ubuntu-0.8ubuntu1'

1,0,0 : ATAPI   , DVD A  DH16AASH , SA15

On purifie

root@gemini:~# cdrdao blank --device 1,0,0
Cdrdao version 1.2.2 - (C) Andreas Mueller 
  SCSI interface library - (C) Joerg Schilling
  Paranoia DAE library - (C) Monty

Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables.

Using libscg version 'ubuntu-0.8ubuntu1'

1,0,0: ATAPI DVD A  DH16AASH	Rev: SA15
Using driver: Generic SCSI-3/MMC - Version 2.0 (options 0x0000)

ERROR: Cannot set write parameters mode page.
Blanking disk...
Blanking time: 24 seconds

mplayer -vo vdpau -vc ffh264vdpau fichier.mp4

Source: http://doc.ubuntu-fr.org/smplayer_mplayer_et_pilote_nvidia_vdpau

This LiveCD was built on a Debian Lenny 5.0.6 with kernel 2.6.32.24 taken from Jeremy repository.

I've finally succeed to installing aufs 2.2 /squashs 4.0 in the kernel 2.6.32.24 in order to be built it

I've installed xen-tools 4.2 with two configuration files (Lenny server and hardy server) as examples

It is a minimalist LiveCD (no X, no gdm, no libvirt) ...Only Xen 4.0.1 with

1. xen-tools 4.2
2. openssh-server: the password for root is toor

1. How to test it?

1. If you have a DHCP server installed somewhere on your personal network, it's great
2. Ensure that you have enough RAM. (>= 1024M)
3. Download from http://www.davidgis.fr/download/xen-4.0.1_lenny-5.0.6_kernel-2.6.32.24_i386_v-0.3.iso. (Be patient when you download).

   wget -q http://www.davidgis.fr/download/xen-4.0.1_lenny-5.0.6_kernel-2.6.32.24_i386_v-0.3.iso

4. Burn it. If you have a tool like wodim

apt-get instal wodim
wodim -v dev=/dev/cdrom xen-4.0.1_lenny-5.0.6_kernel-2.6.32.24_i386_v-0.3.iso

5. Boot on CD!

2. Make a Lenny domU or a Ubuntu Hardy domU

Once boot is ok, let's try to make a little domU. If you've got the IP from the machine, connect by ssh (the root's password is toor)

Configuriton file for a Lenny domU

I will make a domU using a xen-tools configuration file

xenalive:~# cat /etc/xen-tools/xen-tools-lenny.conf 
dir = /opt/Xen/

# Méthode d'installation
#########################
install-method = debootstrap
# Prendre un mirroir assez proche
mirror = http://ftp.fr.debian.org/debian/
arch = i386

# Configuration de la machine
###############################
size   = 512Mb      # Disk image size.
memory = 256Mb    # Memory size
swap   = 128Mb    # Swap size
fs     = ext3     # use the EXT3 filesystem for the disk image
dist   = lenny     # Default distribution to install.
image  = sparse   # Specify sparse vs. full disk images.
kernel      = /boot/vmlinuz-`uname -r`
initrd      = /boot/initrd.img-`uname -r`

# Devices et compagnie
########################
ext3_options   = noatime,nodiratime,errors=remount-ro
ext2_options   = noatime,nodiratime,errors=remount-ro
xfs_options    = defaults
reiser_options = defaults
serial_device = hvc0
disk_device = xvda


# Lors de l'installation, il faudra fournir un mot de passe
passwd = 1

# On recupere les users du dom0
accounts = 1

# Repertoire où sont stockés les fichiers de configuration
output    = /etc/xen/machines 

# Extension des fichiers
extension = .cfg

# Role necessaire pour installer ssh, notamment lors de la première connexion
role = udev  

Create the domU

xenalive:~# xen-create-image --dhcp --hostname=domU-1-lenny --config=/etc/xen-tools/xen-tools-lenny.conf 

General Information
--------------------
Hostname       :  domU-1-lenny
Distribution   :  lenny
Mirror         :  http://ftp.fr.debian.org/debian/
Partitions     :  swap            128Mb (swap)
                  /               512Mb (ext3)
Image type     :  sparse
Memory size    :  256Mb
Kernel path    :  /boot/vmlinuz-2.6.32.24
Initrd path    :  /boot/initrd.img-2.6.32.24

Networking Information
----------------------
IP Address     : DHCP [MAC: 00:16:3E:EF:8C:45]

WARNING
-------
Loopback module not loaded and you're using loopback images
Run the following to load the module:

modprobe loop max_loop=255


Creating partition image: /opt/Xen//domains/domU-1-lenny/swap.img
Done

Creating swap on /opt/Xen//domains/domU-1-lenny/swap.img
Done

Creating partition image: /opt/Xen//domains/domU-1-lenny/disk.img
Done

Creating ext3 filesystem on /opt/Xen//domains/domU-1-lenny/disk.img
Done
Installation method: debootstrap
Done

Running hooks
Done

Role: udev
	File: /etc/xen-tools/role.d/udev
Role script completed.

Creating Xen configuration file
Done
Setting up root password
Enter new UNIX password: 
Retype new UNIX password: 
passwd: password updated successfully
All done


Logfile produced at:
	 /var/log/xen-tools/domU-1-lenny.log

Installation Summary
---------------------
Hostname        :  domU-1-lenny
Distribution    :  lenny
IP-Address(es)  :  dynamic
RSA Fingerprint :  0f:5b:3d:95:dc:ea:84:ce:78:83:02:27:e1:f2:91:f9
Root Password   :  N/A

Start the domU

xm create /etc/xen/machines/domU-1-lenny.cfg -c
... ....
.... ....
Starting OpenBSD Secure Shell server: sshd.
Starting periodic command scheduler: crond.

Debian GNU/Linux 5.0 domU-1-lenny hvc0

domU-1-lenny login: root
Password: 

Press ([CRTL]+[5]) to go away from domU. Here is a example of disk when the domU has started

xenalive:~# df -h
Filesystem            Size  Used Avail Use% Mounted on
aufs                  2.0G  414M  1.6G  22% /
tmpfs                 2.0G     0  2.0G   0% /lib/init/rw
udev                   10M  7.6M  2.5M  76% /dev
tmpfs                 2.0G  4.0K  2.0G   1% /dev/shm
/dev/sr0              248M  248M     0 100% /live/image
tmpfs                 2.0G  414M  1.6G  22% /live/cow
tmpfs                 2.0G     0  2.0G   0% /live
tmpfs                 2.0G     0  2.0G   0% /tmp

Infos about the LiveCD

The CD was build with the following options

• I've used the work done from LiveCD 2.0 (http://wiki.xensource.com/xenwiki/LiveCD) . I've had to modify the scripts from http://github.com/tmartinx/xenlivecd
• by adding supports for aufs 2.2 and squashs 4.0

  ######### aufs ###########
  CONFIG_AUFS_FS=y
  CONFIG_AUFS_BRANCH_MAX_127=y
  CONFIG_AUFS_HNOTIFY=y
  CONFIG_AUFS_HFSNOTIFY=y
  CONFIG_AUFS_EXPORT=y
  CONFIG_AUFS_BR_RAMFS=y
  CONFIG_AUFS_BDEV_LOOP=y
  ######### squashfs ###########
  CONFIG_SQUASHFS=m
  CONFIG_SQUASHFS_EMBEDDED=y
  CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3

  If you want support for aufs (needed for LiveCD), you have to do something like

   cd /linux-2.6-xen/
   git branch my/xen-2.6.32/aufs
   git checkout my/xen-2.6.32/aufs
   git remote add aufs2 http://git.c3sl.ufpr.br/pub/scm/aufs/aufs2-2.6.git
   git fetch aufs2
   git merge aufs2/aufs2-32
  

  then

  make menuconfig

• I've added xen-tools 4.2