2005-12-07 21:00

Xen on CentOS4

Just in case anyone is wondering if you can install the Xen hypervisor on a CentOS box:

  1. Sure. It works just fine.
  2. Ok, there are a couple of glitches in the install.

Here's how I did it, on a CentOS 4.2 box:

  • Get the install script for RHEL 4.1
  • Fix the validate_os_version function:
validate_os_version() {
    #grep "Red Hat Enterprise Linux AS release 4 (Nahant Update 1)" /etc/redhat-release 2>/dev/null >/dev/null
   true
}
  • Run it
  • Fix your grub.conf adding this :
title Xen 3.0 / XenLinux 2.6
  kernel /boot/xen-3.0.gz dom0_mem=262144
  module /boot/vmlinuz-2.6-xen root=/dev/hda1 ro console=tty0
  module /boot/initrd-2.6-xen.img
  • Fix your glibc by doing this:
mv /lib/tls/ /lib/tls.disabled
  • Boot on the Xen option from Grub, and you already have a CentOS Dom0. Quite simple, wasn't it? :-)

Main problem: The Xen kernel you are booting sucks, because it supports no unusual hardware. So, it would be a good idea to hack a decent Xen-linux-kernel similar to CentOS unsupported one.

Now it's time to start toying with CentOS partitions, but they are supposed to be simple.

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