Network booting with a disk image ?

[teresita]

Hi to everybody,

I'm looking for a way of booting a server/computer with a disk image
(generated for example with "cat /dev/hda > disk-image.img" or "dd
if=/dev/hda of=disk-image.img") stored in a TFTP or NFS server.

The procedure should be somehow like this :

1.- You power on the computer.
2.- Computer sends a dhcp request for obtaining the network config.
3.- Computer connects to tftp or NFS server. It then issues a
command like "cat /nfssharedir/disk-image.img > /dev/hda" or "dd
if=/nfssharedir/disk-image.img of=/dev/hda"
4.- It then continues booting using that image.
5-. You end up with a fresh system 100% identical to the one from
whom you made the image.

Is it possible to do this with GRUB ? Or anyother combination of
tools / methods you may know ?

Thanks in advance, Regards,
Teresa.