PvGrub

PV-GRUB is an alternative to PyGrub to boot domU images safely: unlike pygrub it runs the regular grub inside the created domain itself and uses regular domU facilities to read the disk / fetch files from network etc.; it eventually loads the PV kernel and chain-boots it.

Configuration

• Boot domU from local disk:

kernel = "/usr/lib/xen/boot/pv-grub-x86_32.gz"
extra = "(hd0,0)/grub/menu.lst"

• Boot domU from network:

kernel = "/usr/lib/xen/boot/pv-grub-x86_32.gz"
extra = "(nd)/grub/menu.lst"

You should setup the DHCP server and TFTP server correctly. Create ${tftproot}/grub/menu.lst; copy necessary files (vmlinuz, initrd, etc.).

Reference

• Xen PVGRUB Howto: http://backdrift.org/xen-pvgrub-howto
• GNU GRUB Manual.
• Xen PXE Boot Howto.