Re: [Xen-users] centos guest domain?

[Kent Watsen <kent@xxxxxxxxxx>]

Steven Ellis wrote:

> 1. You need to copy the modules for the DomU kernel into the guest 
> filesystem.
> 2. You probably need an initrd for the guest otherwise it will panic.
>
> 3. I'd personally advise using the DomU kernel that comes with the 
> 2.0.7 tar ball as it is closer to the RH released kernel.

Steven, thanks for the pointer - following your suggestions has it 
working now!

For others that might stumble on this thread, these steps should work:

1) install CentOS 4.1 from its ISO images
2) boot into it
3) download binary xen release from http://www.xensource.com/downloads/
4) extract it into <pick-a-dir>
5) cp <pick-a-dir>/install/boot/vmlinuz-2.6.11.12-xenU /tmp
6) cp -a <pick-a-dir>/install/lib/modules/2.6.11.12-xenU /lib/modules
7) cd /lib/modules/; depmod 2.6.11.12-xenU; mkinitrd 
/tmp/2.6.11.12-xenU.img 2.6.11.12-xenU
8) now, copy both of the files in /tmp to your Xen's Dom0's /boot
9) config your xen file, mine is as follows:

   kernel = "/boot/vmlinuz-2.6.11.12-xenU"
   ramdisk = "/boot/initrd-2.6.11-12.xenU.img"
   memory = 256
   name = "CentOS"
   vif = [ 'mac=aa:cc:00:00:00:63, bridge=xen-br0' ]
   disk = [ 'phy:hdb1,hdb1,w', 'phy:hdb2,hdb2,w' ]
   netmask="255.255.255.0"
   gateway="10.0.3.1"
   hostname= "centos"
   root = "/dev/hdb1 ro"
   extra = "3"

Note: this works in part because the Xen's binary release is very 
similar the CentOS; it is very unlikely it work for any non-Linux guest 
OS.  It will be interesting to see how much of this kind of stuff will 
be eliminated with AMD's Pacifica architecture and the supporting Xen 
release ...

Cheers!
Kent


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