User manual NOVELL SUSE LINUX ENTERPRISE DESKTOP 11 SP1 8-18-2010 VIRTUALIZATION WITH ZEN

[. . . ] SUSE Linux Enterprise Desktop 11 SP1 August 18, 2010 www. novell. com Virtualization with Xen Virtualization with Xen All content is copyright © 2006­2010 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. [. . . ] TIP: Bonding and Xen Using bonding devices is only interesting for machines where you have multiple real network cards available. In most configurations, this means that you should use the bonding configuration only in Domain0. Only if you have multiple network cards assigned to a VM Guest system it may also be useful to set up the bond in a VM Guest. Virtual Networking 55 To configure a bonding device, use the following procedure: 1 Run YaST > Network Devices > Network Settings. Proceed with Next. 3 Select how to assign the IP address to the bonding device. Three methods are at your disposal: · No IP Address · Dynamic Address (with DHCP or Zeroconf) · Statically assigned IP Address Use the method that is appropriate for your environment. 4 Select the Ethernet devices that should be included into the bond by activating the check box in front of the respective Bond Slave. The modes that are available for configuration are the following: · balance-rr · active-backup 56 Virtualization with Xen · balance-xor · broadcast · 802. 3ad · balance-tlb · balance-alb 6 Make sure that the parameter miimon=100 is added to the Bond Driver Options. All modes, and lots of more options are explained in detail in the Linux Ethernet Bonding Driver HOWTO found at /usr/src/linux/Documentation/ networking/bonding. txt after installing the package kernel-source. 6. 5. 4 Using VLAN Interfaces Sometimes, it is necessary to create a private connection either between two Xen hosts or between a number of VM Guest systems. For example, if you want to migrate VM Guest to hosts in a different network segment, or if you want to create a private bridge that only VM Guest systems may connect to, even when running on different VM Host Server systems. VLAN interfaces are commonly set up on the VM Host Server and either just interconnect the different VM Host Server systems, or they may be set up as physical interface to an otherwise virtual only bridge. It is even possible to create a bridge with a VLAN as physical interface that has no IP address in the VM Host Server. That way, the guest systems have no possibility to access Domain0 over this network. Follow this procedure to actually set up the VLAN device: Procedure 6. 3 Setting up VLAN Interfaces with YaST 1 Press Add to create a new network interface. Virtual Networking 57 2 In the Hardware Dialog, select Device Type VLAN. 5 Select the interface that the VLAN device should connect to below Real Interface for VLAN. If the desired interface does not appear in the list, first set up the this interface without IP Address. 6 Select the desired method for assigning an IP address to the VLAN device. It is also possible to use the VLAN interface as physical interface of a bridge. This makes it possible to connect several VM Host Server only networks and allows to live migrate VM Guest systems that are connected to such a network. However, this may be a desired feature especially if VM Host Server only networks should be connected. In this case, use the special address 0. 0. 0. 0 with netmask 255. 255. 255. 255. The system scripts handle this address as no IP address set. 58 Virtualization with Xen Block Devices in Xen 7. 1 Mapping Physical Storage to Virtual Disks Virtual disks can be based on the following types of physical devices and files. · A physical disk device, such as a DVD, that is accessible as a device to the host. phy:/dev/cdrom 7 · A file that contains a disk image accessible from the file system of the host. [. . . ] Example: (usb 1) 2. 24 usbdevice Adds the specified USB device to the VM Guest. (usbdevice tablet) 2. 25 vnc Defines if VNC should be enabled for graphics. Example: (vnc 1) 2. 26 vncunused If not set to 0, this option enables the VNC server on the first unused port above 5900. (vncunused 1) 2. 27 xauthority When using SDL, the specified file is used to define access rights. If not set, the value from the XAUTHORITY environment variable is used. Example: (xauthority /root/. Xauthority) 126 Virtualization with Xen maxmem Defines how much memory in MB can be assigned to the VM Guest while running. [. . . ]