QEMU script for virtual machine creation and emulation

[Download qemu.sh here]

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#!/bin/sh
 
###
# FILE:
#   qemu.sh
#
# DESCRIPTION:
#   Virtual machine creation and emulation
#
# AUTHOR:
#   Olaf Reitmaier <olafrv@gmail.com> (20/07/2009)
#
# HOW-TO:
#   Put this on you /etc/network/interfaces
#   if the real NIC in configured via dhcp:
#
#     auto lo
#     iface lo inet loopback
#
#     auto eth1
#
#     auto br0
#     iface br0 inet dhcp
#        bridge_ports eth1
#
#   Put this on you /etc/network/interfaces if
#   the real NIC in configured with and static IP:
#
#    auto lo
#    iface lo inet loopback
#
#    auto eth1
#
#    auto br0
#    iface br0 inet static
#        address 172.26.98.50
#        netmask 255.255.248.0
#        gateway 172.26.96.1
#        bridge_ports eth1
#
#
#   Then execute the following commands:
#     cp qemu.sh ~
#     apt-get install -y bridge-utils and kqemu-common kqemu-source
#     cd /usr/src/
#     bzip2 -d kqemu.tar.bzip2
#     tar xvf kqemu.tar
#     cd modules/kqemu
#     ./configure && make && make install
#     cd ~
#     sudo ./qemu.sh
##
 
echo Moving display
export DISPLAY=:0.0
 
echo Loading acceleration kernel module
modprobe kqemu
 
echo Verifying hard disk image
if ! [ -f hda.img ]; then
echo Creating hda.img
qemu-img create hda.img 20G
fi
 
echo Verifying virtual net device
if ! [ -a /dev/net/tun ]; then
echo Creating /dev/net/tun
mknod /dev/net/tun c 10 200
fi
 
echo To boot from a CD/DVD image or disk put
echo this on qemu options but one "-cdrom"
echo line showed bellow
echo   -boot d \
echo   -cdrom /dev/cdrom \
echo   -cdrom cd.iso \
 
echo Starting VM emulation
qemu -m 256 \
-k es \
-net nic,vlan=0 \
-net tap,vlan=0,ifname=tap0 \
-hda hda.img \
-boot c \
-cdrom /dev/cdrom \
-usb \
-usbdevice "host:04a9:1900" \
-localtime &
 
echo Wainting VM boot and tap0 to appears
sleep 30s
 
echo Enabling tap0
/sbin/ifconfig tap0 0.0.0.0 promisc up
 
echo Adding tap0 to br0
/usr/sbin/brctl addif br0 tap0

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