Public bug reported:

Xen was installed from the feisty repositories, the domU system was
installed with debootstrap using the "debian lenny" template and later
with the "ubuntu feisty" template. The installation is detailed later on
this page. This recipe used to work fine but now show shortcomings. The
eth0 interface is configured in the domU to dynamically retrieve its IP
address.

The domU boots but can't get an IP address:

[EMAIL PROTECTED]:~# dhclient eth0
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

socket: Address family not supported by protocol - make sure
CONFIG_PACKET (Packet socket) and CONFIG_FILTER
(Socket Filtering) are enabled in your kernel
configuration!


DomU installation step:
 1. create a partition {{{
lvcreate -n azalee -L 2G hd && mkfs.ext3 /dev/mapper/hd-azalee
mkdir /mnt/azalee && mount /dev/mapper/hd-azalee /mnt/azalee}}}

 1. install a minimum debian system: {{{
debootstrap feisty /mnt/azalee}}}

 1. configure the minimum debian system : {{{
chroot /mnt/azalee
cat > /etc/hostname <<.
azalee
.
cat > /etc/fstab <<.
/dev/hda1       /           ext3    defaults        0       1
.
cat > /etc/network/interfaces <<.
auto lo eth0
iface lo inet loopback
iface eth0 inet dhcp
.
exit
umount /mnt/azalee
}}}

 1. create a "xen domain" ie a vm {{{
cat > /etc/xen/azalee <<.
name    = "azalee"
kernel  = "/boot/vmlinuz-2.6.19-4-server"
ramdisk = "/boot/initrd.img-2.6.19-4-server"
root    = "/dev/hda1"
disk    = [ 'phy:/dev/hd/azalee,hda1,w' ]
vif     = [ 'mac=00:16:3E:00:01:03']
memory  = 200
.}}}

** Affects: xen-3.0 (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Xen was installed from the feisty repositories, the domU system was
  installed with debootstrap using the "debian lenny" template and later
  with the "ubuntu feisty" template. The installation is detailed later on
  this page. This recipe used to work fine but now show shortcomings. The
  eth0 interface is configured in the domU to dynamically retrieve its IP
  address.
  
  The domU boots but can't get an IP address:
  
  [EMAIL PROTECTED]:~# dhclient eth0
  Internet Systems Consortium DHCP Client V3.0.4
  Copyright 2004-2006 Internet Systems Consortium.
  All rights reserved.
  For info, please visit http://www.isc.org/sw/dhcp/
  
  socket: Address family not supported by protocol - make sure
  CONFIG_PACKET (Packet socket) and CONFIG_FILTER
  (Socket Filtering) are enabled in your kernel
  configuration!
  
  
  DomU installation step:
   1. create a partition {{{
  lvcreate -n azalee -L 2G hd && mkfs.ext3 /dev/mapper/hd-azalee
- mkdir /mnt/azalee && mount /dev/mapper/hd-krusty /mnt/azalee}}}
+ mkdir /mnt/azalee && mount /dev/mapper/hd-azalee /mnt/azalee}}}
  
   1. install a minimum debian system: {{{
  debootstrap feisty /mnt/azalee}}}
  
   1. configure the minimum debian system : {{{
  chroot /mnt/azalee
  cat > /etc/hostname <<.
  azalee
  .
  cat > /etc/fstab <<.
  /dev/hda1       /           ext3    defaults        0       1
  .
  cat > /etc/network/interfaces <<.
  auto lo eth0
  iface lo inet loopback
  iface eth0 inet dhcp
  .
  exit
  umount /mnt/azalee
  }}}
  
   1. create a "xen domain" ie a vm {{{
  cat > /etc/xen/azalee <<.
  name    = "azalee"
  kernel  = "/boot/vmlinuz-2.6.19-4-server"
  ramdisk = "/boot/initrd.img-2.6.19-4-server"
  root    = "/dev/hda1"
  disk    = [ 'phy:/dev/hd/azalee,hda1,w' ]
  vif     = [ 'mac=00:16:3E:00:01:03']
  memory  = 200
  .}}}

-- 
dhclient fails in domU
https://bugs.launchpad.net/bugs/127215
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