KVM Setup

KVM Virtualization On Ubuntu Host

################install KVM and vm builder utils#######################
sudo apt-get install kvm kvm-pxe libvirt-bin ubuntu-vm-builder bridge-utils

################install uml utilities##################################
sudo apt-get install uml-utilities

################Test kvm installation##################################
virsh -c qemu:///system list

################/etc/network/interfaces################################
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet manual

#virtual interface
auto br0
iface br0 inet static
        address 172.16.2.230
        network 172.16.2.0
        netmask 255.255.255.0
        broadcast 172.16.2.255
        gateway 172.16.2.252
        bridge_ports eth0
        bridge_stp off
        bridge_fd 9
        bridge_hello 2
        bridge_maxwait 12

##############To create virbr0 DHCP####################################
sudo vim  /etc/libvirt/qemu/networks/default.xml

#change this to
<network>
  <name>default</name>
  <bridge name="virbr%d" />
  <forward/>
  <ip address="192.168.122.1" netmask="255.255.255.0">
    <dhcp>
      <range start="192.168.122.2" end="192.168.122.254" />
    </dhcp>
  </ip>
</network>

#this
<network>
  <name>default</name>
  <bridge name="virbr%d" />
  <forward/>
  <ip address="10.0.1.1" netmask="255.0.0.0">
    <dhcp>
      <range start="10.0.1.10" end="10.0.1.100" />
    </dhcp>
  </ip>
</network>

##############Restart virtual network##################################
sudo virsh net-list
sudo virsh net-destroy default
sudo virsh net-stop default

##############Command to create a new image file#######################
sudo qemu-img create -f qcow win2k3-64.img 10G

##############Command to boot from the disk############################
sudo qemu-system-x86_64 -m 512 -hda win2k3-64.img -cdrom /dev/dvd -boot d -vnc :1

##############Script to generate random MAC address####################
#! /usr/bin/python
# macgen.py script generates a MAC address for Xen guests
#
import random
mac = [ 0x00, 0x16, 0x3e,
random.randint(0x00, 0x7f),
random.randint(0x00, 0xff),
random.randint(0x00, 0xff) ]
print ':'.join(map(lambda x: "%02x" % x, mac))

##############Command to launch the image##############################
sudo qemu-system-x86_64 -hda vms/tstproxy/win2003-64.qcow -m 1024 -net nic,macaddr=00:16:3e:03:d9:5f -net tap -nographic -localtime &
sudo qemu-system-x86_64 -hda vms/tstapp01/win2003-64.qcow -m 2048 -net nic,macaddr=00:16:3e:33:0e:8a -net tap -nographic -localtime &
sudo qemu-system-x86_64 -hda vms/tstapp02/win2003-64.qcow -m 2048 -net nic,macaddr=00:16:3e:3e:7e:14 -net tap -nographic -localtime &

##############Command to check the available memory####################
free -m
free -m  -l -s 2

##############Command to list running KVM/QEMU processes###############
ps -A | grep qemu