User manual NOVELL XEN ADMINISTRATION

[. . . ] SUSE Linux Enterprise Server 10 SP2 July 15, 2008 www. novell. com Virtualization with Xen Virtualization with Xen All content is copyright © Novell, Inc. Legal Notice This manual is protected under Novell intellectual property rights. By reproducing, duplicating or distributing this manual you explicitly agree to conform to the terms and conditions of this license agreement. This manual may be freely reproduced, duplicated and distributed either as such or as part of a bundled package in electronic and/or printed format, provided however that the following conditions are fulfilled: That this copyright notice and the names of authors and contributors appear clearly and distinctively on all reproduced, duplicated and distributed copies. [. . . ] To set the default to use SDL instead of VNC, change the virtual machine's configuration information to the following. For instructions, see Section 4. 3, "Configuring a Virtual Machine by Modifying its xend Settings" (page 30). · If it is a fully virtual machine, use vnc=0 and sdl=1. · If it is a paravirtual virtual machine, use vfb=["type=sdl"]. Remember that, unlike a VNC viewer window, closing an SDL window terminates the virtual machine. 5. 4 The Boot Loader Program The boot loader controls how the virtualization software boots and runs. You can modify the boot loader properties by using YaST, or by directly editing the boot loader configuration file. The YaST boot loader program is located at YaST > System > Boot Loader. The Boot Loader Settings screen lists the sections that appear as options on the boot menu. From this screen, you can change the boot loader so it auto-selects the virtual machine host option when booting. 42 Virtualization with Xen Figure 5. 3 Boot Loader Settings Select the Xen section, then click Edit to manage the way the boot loader and Xen function. Figure 5. 4 Boot Loader Settings: Section Management You can use the Boot Loader program to specify functionality, such as: · Pass kernel command line parameters · Specify the kernel image and intial RAM disk Virtualization: Configuration Options and Settings 43 · Select a specific hypervisor · Pass additional parameters to the hypervisor (see /usr/share/doc/packages/ xen/pdf/user. pdf section "Xen Boot Options" after installing the package xen-doc-pdf). You can customize your virtualization environment by editing the /boot/grub/ menu. lst file. If the Xen option does not appear on the GRUB boot menu, you can compare your updated GRUB boot loader file with the examples below to confirm that it was updated correctly. The first example shows a typical GRUB boot loader file updated to load the kernel that supports virtualization software. The second example shows a GRUB boot loader file that loads the PAE-enabled virtualization kernel. Example 5. 1 Xen Section in the menu. lst File (Typical) title XEN root (hd0, 5) kernel /boot/xen. gz hyper_parameters module /boot/vmlinuz-xen kernel_parameters module /boot/initrd-xen Example 5. 2 Xen Section in the menu. lst File (PAE) title XEN root (hd0, 5) kernel /boot/xen-pae. gz hyper_parameters module /boot/vmlinuz-xenpae kernel_parameters module /boot/initrd-xenpae The title line defines sections in the boot loader file. Do not change this line, because YaST looks for the word XEN to verify that packages are installed. The root line specifies which partition holds the boot partition and /boot directory. Replace hd0, 5 with the correct partition. For example, if the drive designated as hda1 holds the /boot directory, the entry would be hd0, 0. The kernel line specifies the directory and filename of the hypervisor. Replace hyper_parameters with the parameters to pass to the hypervisor. A common parameter is dom0_mem=<amount_of_memory>, which specifies how much memory 44 Virtualization with Xen to allocate to Domain0. [. . . ] 3a Launch YaST by entering yast2 at a terminal. 3b Select Software > Software Management. 3c Search for xen-kmp and make sure that the appropriate drivers are installed for your system. Virtual Machine Drivers 89 If they are not selected, select them and click Accept to complete the installation. Setup your virtual machine to use the paravirtualized disk drivers: 1 In the VM Guest, edit the file /boot/grub/menu. lst. [. . . ]