====== Debian_Etch_Xen_Install ======

= Install Xen with Debian Etch =

====== Backup any Previous Boot and Xen Configs ======
 cp -R /etc/xen /root/
 cp -R /boot /root/

====== Uninstall any previous Xen software ======
If you are running an old Xen, the software and kernel can be removed while in dom0 (base xen instance).
 dpkg -l | grep -i xen
 apt-get remove xen-tools etc.

====== Main Install ======
 apt-get install linux-image-2.6-xen-686 xen-hypervisor-3.0.3-1-i386-pae xen-tools bridge-utils libc6-xen sysfsutils
**Note: The pae hypervisor was the one which was required**<br>
"Debian Xen System and PAE....this is a well known problem, because the Debian Xen Team cancelled support for non-pae kernels" - thanks serverchef.

**Note:** re libc6-xen: It eliminates moving /lib/tls to /lib/tls.disabled (supposedly).

====== Check Grub && Reboot ======
Check /boot/grub/menu.lst to see if the Xen Kernel and initrd.img are added in correctly. 

After reboot, check xen with: "xm list", "xm top". Also check "ifconfig", which should show: peth0 and vif0.0.

====== Setting up dom0 correctly to use Network Bridge ======
 vi /etc/xen/xend-config.sxp 
 #xend-relocation-server yes
 (vif-script vif-bridge)
 (dom0-min-mem 128)
 #(network-script network-dummy)
 #(xend-relocation-hosts-allow '^localhost$')
 (network-script network-bridge)

====== Setup Xen Guest Domains - domU ======
The setup is the exact same as here: [[Create_DomU]]

====== Extra Tweaking of domU Required ======
On all domU xen config files, make sure to specify a fixed MAC address. Otherwise udev will increment the domU eth0 to eth1 etc. This problem is further discussed [[Moving_from_Xen_Backports_to_Debian_Etch_Xen_Packages_-_Attempt1#Problems_with_incrementing_eth0.3B_changing_mac_address.2C_udev.2C_xen_and_etch|here]]
 vi /etc/xen/domains/name_of_vm
 vif = [['mac=aa:00:00:7d:f8:77,|bridge=xenbr0']]

On all domU's:
 apt-get install linux-image-2.6-xen-686

To fix up "4gb seg fixup" errors on domU's:
 mv /lib/tls /lib/tls.disabled
/lib/tls will be repopulated when apting new packages and updating libc. A more permament solution can be found here:  http://wiki.xensource.com/xenwiki/DebianTlsLibcDiversion 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=405223 
The domU's need to be rebooted for this to take effect and for the "4gb seg fixup" errors to stop.

====== RAID 1 ======
Please read:
 http://svn.debian.org/wsvn/pkg-mdadm/mdadm/trunk/debian/README.upgrading-2.5.3?op=file
It mainly details with raid1 when migrating from sarge to etch however.


====== Extra Step - NOT Required ======
This step below was only required for sarge backports.
 vi /etc/initramfs-tools/modules
 #include the following
 raid1
 
 update-initramfs -u
 update-initramfs -u -a   #for all kernels

----
That should be it. There are a few issues I was having with root of dom0 loading of /dev/md0. I will post the fixes and details here later.