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#!/usr/bin/perl
#
# Copyright 2009-2012 Eucalyptus Systems, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 3 of the License.
#
# 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, see http://www.gnu.org/licenses/.
#
# Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
# CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
# additional information or have any questions.
#
# This file may incorporate work covered under the following copyright
# and permission notice:
#
# Software License Agreement (BSD License)
#
# Copyright (c) 2008, Regents of the University of California
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms,
# with or without modification, are permitted provided that the
# following conditions are met:
#
# Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
# THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
# COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
# AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
# IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
# SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
# WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
# REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
# IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
# NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.

# this generates an XML template for libvirt domain specification,
# which is tailored to an instance by the node controller

use diagnostics;
use warnings;
use sigtrap;
use strict;
use English; # for descriptive predefined var names
use Data::Dumper; # for debugging: print Dumper($var)
use Getopt::Long;
use FindBin;
$OUTPUT_AUTOFLUSH = 1; # no output buffering

our $use_ramdisk = 0;
our $use_ephemeral = 0;
our $use_kernel = 0;
our $plaindisk = 0;

# deal with command-line parameters
GetOptions('ramdisk' => sub { $use_ramdisk = 1; },
           'ephemeral' => sub { $use_ephemeral = 1; },
'kernel' => sub { $use_kernel = 1; }
) or exit (1);

if (!$use_ramdisk && !$use_kernel) {
    $plaindisk = 1;
}

print <<EOF;
<domain type='xen'>
<name>NAME</name>
<os>
EOF


if (!$plaindisk) {
    print " <type>linux</type>\n";
    if ($use_kernel) {
print " <kernel>BASEPATH/kernel</kernel>\n";
    }
    if ( $use_ramdisk ) {
print " <initrd>BASEPATH/ramdisk</initrd>\n";
    }
    print " <root>/dev/sda1</root>\n";
    print " <cmdline> ro</cmdline>\n";
} else {
    print " <type>hvm</type>\n";
    print " <loader>/usr/lib/xen/boot/hvmloader</loader>\n";
}


print <<EOF;
</os>
EOF

if ($plaindisk) {
print <<EOF;
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='localtime'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
EOF
}

print <<EOF;
<memory>MEMORY</memory>
<vcpu>VCPUS</vcpu>
<devices>
EOF

if ($plaindisk) {
    print " <emulator>/usr/lib64/xen/bin/qemu-dm</emulator>\n";
}

print <<EOF;
<disk type='file'>
<source file='BASEPATH/root'/>
EOF

if ($plaindisk) {
    print " <target dev='hda' bus='ide'/>\n";
} else {
    print " <target dev='sda1'/>\n";
}

print <<EOF;
</disk>
EOF

if (!$plaindisk) {
    if ( $use_ephemeral ) {
print <<EOF;
<disk type='file'>
<source file='BASEPATH/ephemeral'/>
<target dev='sda2'/>
</disk>
EOF
    }
}

if (!$plaindisk) {
print <<EOF;
<disk type='file'>
<source file='SWAPPATH/swap'/>
<target dev='sda3'/>
</disk>
EOF
}

if ($plaindisk) {
print <<EOF;
<disk type='file' device='floppy'>
<source file='BASEPATH/floppy'/>
<target dev='fda'/>
</disk>
EOF
}

print <<EOF;
<interface type='bridge'>
<source bridge='BRIDGEDEV'/>
<mac address='PRIVMACADDR'/>
<script path='/etc/xen/scripts/vif-bridge'/>
</interface>
EOF
if ($plaindisk) {
print <<EOF;
<serial type='pty'>
<source path='/dev/pts/3'/>
<target port='0'/>
</serial>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
EOF
}

print <<EOF;
<!-- <graphics type='vnc' port='-1' autoport='yes' keymap='en-us' listen='0.0.0.0'/> -->
</devices>
</domain>
EOF
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