create-instance

#!/bin/bash
# Cloudy: An open LAMP benchmark suite
# Copyright (C) 2010 Adam Litke, IBM Corporation
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

###############################################################
# create-instance - Create a cloudy virtual machine instance. #
###############################################################

### Command-line arguments
NR=$1
###

### Import Global Configuration
. config

### Global variables
BASEIMAGE=`pwd`/baseimage/baseimage.img
NAME="cloudy-$1"
SERIAL_PORT_NR=$(($SERIAL_PORT_BASE + $NR))
MAC_NR=64

DIR=`pwd`/instances/$NAME

function find_qemu()
{
    if [ -n "$QEMU" ]; then
        return
    fi

    QEMU=`which qemu-system-x86_64`
    if [ $? -eq 0 ]; then
        return
    fi
    QEMU=`which qemu-kvm`
    if [ $? -eq 0 ]; then
        return
    fi
    if [ -x "/usr/libexec/qemu-kvm" ]; then
        QEMU="/usr/libexec/qemu-kvm"
        return
    fi

    # Not Found!
    echo "Could not find qemu!  Please set QEMU manually."
    exit 1
}

#
# Start of main script
#

if [ -z "$NR" ]; then
    echo "You must specify a domain sequence number"
    exit 1
fi

if [ ! -f $BASEIMAGE ]; then
    echo "Missing base image: $BASEIMAGE !"
    echo "You must first run create-baseimage"
    exit 1
fi

rm -rf $DIR
mkdir -p $DIR

# Create a custom setup image
./create-setupimage -o $DIR/setup.iso -v NAME="$NAME" -v DURATION=7200 \
                                      -v IMAGE_SIZE=20000  >/dev/null

pushd $DIR > /dev/null
qemu-img create -f qcow2 -b $BASEIMAGE root.img > /dev/null
if [ $? -ne 0 ]; then
    echo "Failed to create disk image! Aborting."
    exit 1
fi
popd > /dev/null

# Choose a mac address:
MAC=`printf "$MAC_BASE%2.2x" $NR`

# Write the domain XML
cat <<EOF > $DIR/domain.xml
<domain type='kvm'>
  <name>$NAME</name>
  <memory>$MEM</memory>
  <currentMemory>$MEM</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc' >hvm</type>
  </os>
  <clock offset='localtime'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <features>
     <pae/>
     <acpi />
     <apic />
  </features>
  <devices>
    <emulator>$QEMU</emulator>
    <disk type='file' >
        <source file="$DIR/root.img"/>
        <target dev='vda' bus='virtio' />
        <driver name='qemu' type='qcow2' cache='none'/>
    </disk>
    <disk type='file' device='cdrom'>
        <source file="$DIR/setup.iso"/>
        <target dev='hdb'/>
        <readonly/>
    </disk>
    <serial type='tcp'>
      <source mode='bind' host='' service='$SERIAL_PORT_NR'/>
      <protocol type='telnet'/>
      <target port='0'/>
    </serial>
    <console type='tcp'>
      <source mode='bind' host='' service='$SERIAL_PORT_NR'/>
      <protocol type='telnet'/>
      <target port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <interface type='bridge'>
      <source bridge='$NET_BRIDGE'/>
      <model type='virtio'/>
      <mac address='$MAC'/>
    </interface>
    <graphics type='vnc'/>
  </devices>
</domain>
EOF

touch $DIR/serial-$SERIAL_PORT_NR

echo "Domain $NAME successfully created in $DIR"
exit 0