Difference between revisions of "KVM"

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= Network =
 
= Network =
Set Network so it is bridged. To check if bridged network is enabled
+
If you want networking in your virtual machines, you will have to set up bridged networking on your host computer first. So:
 +
* start <tt>yast2 lan</tt> and delete the configuration of your network card. We call it ''eth0'' in this example.
 +
* create an additional network device, a bridge, using yast2. Assign it your default IP address. Configure it to bridge network traffic for ''eth0''.
 +
* restart networking
 +
/etc/init.d/network restart
 +
* restart the hypervisor
 +
/etc/init.d/libvirtd restart
 +
* create a new virtual machine with networking
 +
 
 +
== more information ==
 
  brctl show
 
  brctl show
If you only see a bridge e.a. vnet0 with a physical interface e.a. eth0 in it, skip this step. Add the physical interface eth0 to the bridge br0.
 
 
  brctl addbr br0
 
  brctl addbr br0
 
  brctl addif br0 eth0
 
  brctl addif br0 eth0
/etc/init.d/libvirtd restart
 
Stop the interface that will be used for bridging:
 
ifdown eth0
 
Now we have to set the ip address of eth0 to the bridge
 
cp /etc/sysconfig/network/ifcfg-eth0 /etc/sysconfig/network/ifcfg-br0
 
vi /etc/sysconfig/network/ifcfg-br0
 
 
Now change it that the content looks like this
 
 
DEVICE=br0
 
TYPE=Bridge
 
BOOTPROTO=static
 
IPADDR=<Static IP address>
 
NETMASK=<Netmask>
 
GATEWAY=<Gateway>
 
ONBOOT=yes
 
 
Now change the content of /etc/sysconfig/network/ifcfg-eth0 to:
 
 
DEVICE=eth0
 
# change the hardware address to match the hardware address your NIC uses
 
HWADDR=00:16:76:D6:C9:45
 
ONBOOT=yes
 
BRIDGE=br0
 
NM_CONTROLLED=no
 
 
Now you delete the entry from the routing table that makes the packages go to eth0:
 
 
  route del -net 192.168.0.0 netmask 255.255.255.0 eth0
 
  route del -net 192.168.0.0 netmask 255.255.255.0 eth0
 
 
Reference: http://kbase.redhat.com/faq/docs/DOC-19071
 
Reference: http://kbase.redhat.com/faq/docs/DOC-19071

Revision as of 19:35, 4 April 2010

SUSE 11.2

  • Make sure you have a modern computer and "virtualization technology" switched on in your BIOS
  • open a console and enter
# yast -i kvm virt-manager
# /etc/init.d/libvirtd start
# chkconfig libvirtd on
# virt-manager

Now you try to create a new virtual machine. When you use Paravirtualization, you get the error message "The hypervisor is not running.". When you try to use "Full virtualization", you get an error

The operating system does not support full virtualization
The CPUs support full virtualization, but it is disabled in the BIOS

To resolve this,

  • create a new connection, type "QEMU/KVM"
  • reboot your computer
  • start virt-manager

create a new virtual machine. You get an error

internal error No <source> 'bridge' attribute specified with <interface type='bridge'/>

To resolve this

  • you disable networking

Now it works - you can create a virtual machine without networking.

Network

If you want networking in your virtual machines, you will have to set up bridged networking on your host computer first. So:

  • start yast2 lan and delete the configuration of your network card. We call it eth0 in this example.
  • create an additional network device, a bridge, using yast2. Assign it your default IP address. Configure it to bridge network traffic for eth0.
  • restart networking
/etc/init.d/network restart
  • restart the hypervisor
/etc/init.d/libvirtd restart
  • create a new virtual machine with networking

more information

brctl show
brctl addbr br0
brctl addif br0 eth0
route del -net 192.168.0.0 netmask 255.255.255.0 eth0

Reference: http://kbase.redhat.com/faq/docs/DOC-19071