Each virtual machine needs a configuration file, that must be
located in /etc/xen/
.
The parameters are the same of a standard Xen config file. Here there are two example configurations for a SmeServer virtual machine:
Example 74.1. Paravirtualization config file
# smeserver_pvm.cfg # # Example config file for a paravirtualized environment running SmeServer. # BOOTLOADER: pyGrub is a domU bootloader that allows, like GRUB, the loading # of kernel and initrd that are into the VM disk image. # In order to make it run, GRUB 1 must be installed on the VM. bootloader = '/usr/lib/rtxen-4.1-1/bin/pygrub' # MEMORY: specify the amount of RAM (MB) to assign at the VM. It couldn't be # more than the physical RAM on the Abilis memory = '512' # DISK: specify the type of disk to use on the virtual machine. # In this example we are using the disk image located in # /opt/domains/smeserver/SmeServer.img. We want use that as a hda disk and have # to be writable (w). The filename is case sensitive. disk =[ 'file:/opt/domains/SmeServer/SmeServer.img,hda,w' ] # NAME: the virtual machine name name = 'smeserver_pvm' # VIF: This section specifies the virtual inetrfaces to assign at the VM. # Every interface (ethX) will be named into dom0 as vifY.X, where Y is the # domain ID. # Is mandatory assign a unique MAC address to the vif in the same network. If # it is not specified, rtXen will create a different address at every restart, # producing potential issues with the DHCP server or internal domU scripts that # need the MAC address ad a reference (ex: udev). Xen's domU MACs all start # with 00:06:3E vif = [ 'mac=00:06:3E:AA:BB:CC' ] # ON_*: This section defines what to do when the VM is rebooted, turned off, # destroyed or recovered after a system crash. # Is also specified the behavior at start/stop of the Xen daemon. on_poweroff = 'destroy' on_reboot = 'restart' on_crash = 'restart' on_xend_start = 'start' on_xend_stop = 'shutdown' # EXTRA: Is possible to add extra parameters to give to the kernel at startup. # Adding extra='clocksource=jiffies' you can avoid some issues with the domU's # system clock. More informations at: # http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1098 extra='clocksource=jiffies'
Example 74.2. HW virtualization config file
# smeserver_hvm.cfg # # Example config file for a HV environment running SmeServer. # KERNEL and BUILDER: For the hardware vitrualization you need to specify # the hvm loader as kernel and hvm as builder. kernel = '/usr/lib/rtxen-4.1-1/boot/hvmloader' builder = 'hvm' # DEVICE_MODEL: The device model allows the hardware devices virtualization # (disks, network interfaces...) device_model = '/usr/lib/rtxen-4.1-1/bin/qemu-dm' # MEMORY: specify the amount of RAM (MB) to assign at the VM. It couldn't be # more than the physical RAM on the Abilis memory = '512' # DISK: specify the type of disk to use on the virtual machine. # In this example we are using the disk image located in # /opt/domains/smeserver/SmeServer.img. We want use that as an emulated hda # disk and has to be writable (w). The filename is case sensitive. disk = [ 'file:/opt/domains/SmeServer/SmeServer.img,ioemu:hda,w' ] # NAME: the virtual machine name name = 'smeserver_hvm' # VIF: This section specifies the virtual inetrfaces to assign at the VM. # Every interface (ethX) will be named into dom0 as vifY.X, where Y is the # domain ID. # Is mandatory assign a unique MAC address to the vif in the same network. If # it is not specified, rtXen will create a different address at every restart, # producing potential issues with the DHCP server or internal domU scripts that # need the MAC address ad a reference (ex: udev). Xen's domU MACs all start # with 00:06:3E. type=ioemu means that the interface is emulated. vif = [ 'type=ioemu,mac=00:16:3E:AA:BB:CC' ] # VNC*: In hardware virtualization is possible to enable a remote desktop to # see the console messages. With the following options is possible to connect # through a VNC client to the dom0's IP and view the terminal. vnc = 1 vncviewer = 0 vncconsole = 1 vnclisten = '0.0.0.0' # ON_*: This section defines what to do when the VM is rebooted, turned off, # destroyed or recovered after a system crash. # Is also specified the behavior at start/stop of the Xen daemon. on_poweroff = 'destroy' on_reboot = 'restart' on_crash = 'restart' on_xend_start = 'start' on_xend_stop = 'shutdown'