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Xen Virtualization by Prabhakar Chaganti

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Pygrub

The normal way in Xen is to specify the kernel and initrd from within the config file in dom0. This means that any time the kernel needs to be modified or changed, you will need administrative privileges on dom0 host in order to modify it. Redhat developed a bootloader named pygrub that works in a similar way to grub, and allows domU users to pick their own kernel using the same user interface as grub. Xen starts pygrub before the domUs start. The console user can select the kernel to boot from a menu that reads from the same configuration file as grub—/grub/menu.lst. Once the user selects a kernel and initrd, control is returned back to Xen and it starts the selected domU kernel. In this chapter we are using the plain Xen way of specifying ...

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