simple kvm/libvirt script

gistfile1.txt

#!/bin/bash

# install kvm & create ubuntu guest

check_root() {
  if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root" 1>&2
    return 1
  fi

  return 0
}

#
# make sure hw is sufficent
#
check_hw() {

  # make sure have 64 bit OS 
  arch=`uname -m`
  if [ "$arch" != 'x86_64' ]; then
    echo "error: OS is not 64 bits"
    return 1
  fi 

  # make sure hw supports virtualization
  info=`egrep '(vmx|svm)' --color=always /proc/cpuinfo`
  if [ ${#info} == 0 ]; then
    echo "error: CPU does not support virtualization"
    return 1
  fi

  # this server meets requirements
  return 0
}

install_kvm() {
  # install lib-virt
  sudo apt-get install -y ubuntu-virt-server ubuntu-vm-builder
  sudo apt-get install -y virtinst

  # add current ueser to libvirtd group
  sudo adduser `id -un` libvirtd
  sudo adduser `id -un` kvm

  # need to relogin for changes to take affect

  return 0
}

setup_bridge() {

  # install bridge networking 
  sudo apt-get install -y bridge-utils

  # set external interface to accept packets for other IPs
  sudo ip link set eth0 promisc on

  # create bridge
  sudo brctl addbr br100

auto br100
iface br100 inet static
address 192.168.100.1
netmask 255.255.255.0
bridge_stp off
bridge_fd 0

  # restart networking so bridge is running
  sudo /etc/init.d/networking restart

  return 0
}

#
# start here
#

if [ check_root ]; then
  exit 1
fi

if [ check_hw  == 1 ]; then
  exit 1
fi

## CHECK IF WE HAVE ALREADY RUN STATE 1

# make sure we have the latest details of ubuntu repos
sudo apt-get update

if [ install_kvm ]; then
  exit 1
fi

# mark state 1 done
echo "1" > ~/state.txt

#
# setup kvm & libvirt
#

# test that working 
virsh -c qemu:///system list


#
# setup network
#

# need to turn on promisouc on eth0

sudo echo << EOF
auto br0
iface br0 inet static
        address 192.168.0.10
        network 192.168.0.0
        netmask 255.255.255.0
        broadcast 192.168.0.255
        gateway 192.168.0.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0
        bridge_maxwait 0
EOF

sudo /etc/init.d/newtorking stop
sudo /etc/init.d/networking start

#
# get guest running
# 

# download cloud image
# from http://cloud-images.ubuntu.com/precise/current/
wget http://cloud-images.ubuntu.com/precise/current/precise-server-cloudimg-amd64.tar.gz

tarball=precise-server-cloudimg-amd64.tar.gz
contents=${tarball}.contents
tar -Sxvzf ${tarball} | tee "${contents}"
base=$(sed -n 's/.img$//p' "${contents}")
kernel=$(echo ${base}-vmlinuz-*)
floppy=${base}-floppy
img=${base}.img
qemu-img create -f qcow2 -b ${img} disk.img

kvm -fda ${floppy} -drive if=virtio,file=disk.img -boot a -vga std -k en-us -vnc :1

sudo ubuntu-vm-builder kvm precise \
                  --domain newvm \
                  --dest newvm \
                  --arch i386 \
                  --hostname vm1 \
                  --mem 1024 \
                  --user anuaimi \
                  --pass m0veF@wrd \
                  --ip 192.168.0.12 \
                  --mask 255.255.255.0 \
                  --net 192.168.0.0 \
                  --bcast 192.168.0.255 \
                  --gw 192.168.0.1 \
                  --dns 192.168.0.1 \
                  --components main,universe \
                  --addpkg acpid \ 
                  --addpkg vim \
                  --addpkg openssh-server \
                  --addpkg avahi-daemon \
                  --libvirt qemu:///system ;

vmbuilder kvm ubuntu \
  --dest=/home/htkh/VirtualMachines \
  --overwrite \
  --mem=1024 \
  --cpus=1 \
  --rootsize=7168 \
  --swapsize=1024 \
  --ip=192.168.1.201 \
  --mask=255.255.255.0 \
  --bcast=192.168.1.255 \
  --gw=192.168.1.254 \
  --addpkg=openssh-server \
  --addpkg=vim \
  --addpkg=cron \
  --addpkg=acpid \
  --arch=amd64 \
  --suite=lucid \
  --flavour virtual \
  --components main,universe,restricted \
  --hostname MediaServer \
  --user htkh \
  --pass mypassword \
  --libvirt qemu:///system \
  --bridge=br0 ;