265 lines
4.4 KiB
Perl
Executable File
265 lines
4.4 KiB
Perl
Executable File
#!/usr/bin/perl -w
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=head1 NAME
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xt-create-config - Create a Xen configuration file for a new domain.
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=cut
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=head1 SYNOPSIS
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xt-create-config [options]
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Help Options:
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--help Show this scripts help information.
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--manual Read this scripts manual.
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--version Show the version number and exit.
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Debugging Options:
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--verbose Be verbose in our execution.
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Mandatory Options:
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--output The output file to use
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All other options from xen-create-image, such as the new IP address(es)
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to give to the new instance, will be passed as environmental variables.
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=cut
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=head1 NOTES
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This script is invoked by xen-create-image after it has created and
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customised a new Xen domain. It is responsible for creating the
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configuration file that Xen itself will use.
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This script will be invoked with a full copy of the arguments from
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xen-create-image in its environment, along with several command line
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arguments.
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=cut
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=head1 AUTHOR
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Steve
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--
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http://www.steve.org.uk/
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$Id: xt-create-xen-config,v 1.8 2006-06-13 13:21:22 steve Exp $
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=cut
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=head1 LICENSE
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Copyright (c) 2005-2006 by Steve Kemp. All rights reserved.
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This module is free software;
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you can redistribute it and/or modify it under
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the same terms as Perl itself.
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The LICENSE file contains the full text of the license.
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=cut
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use strict;
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use Env;
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use Getopt::Long;
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use Pod::Usage;
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#
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# Configuration values read from the command line.
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#
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# We do not need to read any configuration file.
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#
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my %CONFIG;
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#
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# Release number.
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#
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my $RELEASE = '2.0';
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#
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# Parse the command line arguments.
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#
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parseCommandLineArguments();
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#
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# Check our arguments.
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#
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checkArguments();
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#
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# Run each relevent hook scripts.
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#
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createXenConfig();
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#
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# Exit cleanly - any errors which have already occurred will result
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# in "exit 1".
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#
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exit 0;
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=head2 parseArguments
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Parse the command line arguments this script was given.
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=cut
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sub parseCommandLineArguments
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{
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my $HELP = 0;
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my $MANUAL = 0;
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my $VERSION = 0;
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#
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# Parse options.
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#
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GetOptions(
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"output=s", \$CONFIG{'output'},
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"verbose", \$CONFIG{'verbose'},
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"help", \$HELP,
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"manual", \$MANUAL,
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"version", \$VERSION
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);
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pod2usage(1) if $HELP;
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pod2usage(-verbose => 2 ) if $MANUAL;
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if ( $VERSION )
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{
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my $REVISION = '$Revision: 1.8 $';
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if ( $REVISION =~ /1.([0-9.]+) / )
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{
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$REVISION = $1;
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}
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print "xt-customize-image release $RELEASE - CVS: $REVISION\n";
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exit;
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}
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}
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=head2 checkArguments
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Test that the command line arguments we were given make sense.
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=cut
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sub checkArguments
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{
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#
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# We require a location.
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#
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if ( ! defined( $CONFIG{'output'} ) )
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{
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print "The '--output' argument is mandatory\n";
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exit 1;
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}
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}
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=head2 createXenConfig
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This function does the real work of creating the Xen configuration
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file.
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=cut
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sub createXenConfig
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{
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my $file = $CONFIG{'output'} . '/' . $ENV{'hostname'} . '.cfg';
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#
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# The parameters we use.
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#
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my $device = 'sda';
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if ( defined( $ENV{'ide'} ) )
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{
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$device = 'hda';
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}
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#
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# Strip a trailing qualifier from the memory
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#
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if ( $ENV{'memory'} =~ /([0-9]+)/ )
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{
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$ENV{'memory'} = $1;
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}
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my $network = '';
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if ( $ENV{'dhcp'} )
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{
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$network =<<EOF;
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dhcp = "dhcp"
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vif = [ '' ]
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EOF
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}
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else
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{
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$network =<<EOF;
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vif = [ 'ip=$ENV{'ip1'}' ]
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EOF
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}
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#
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# Images as presented to Xen.
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#
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my $image_vbd;
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my $swap_vbd;
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if ( $ENV{'lvm'} )
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{
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$image_vbd = "phy:$ENV{'lvm'}/$ENV{'hostname'}-disk";
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$swap_vbd = "phy:$ENV{'lvm'}/$ENV{'hostname'}-swap";
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}
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else
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{
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$image_vbd = "file:$ENV{'dir'}/domains/$ENV{'hostname'}/disk.img";
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$swap_vbd = "file:$ENV{'dir'}/domains/$ENV{'hostname'}/swap.img";
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}
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#
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# Quick hack
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#
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my $device1 = $device . "1";
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my $device2 = $device . "2";
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#
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# Now output the data.
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#
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open( FILE, ">", $file );
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print FILE <<E_O_HEADER;
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kernel = '$ENV{'kernel'}'
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ramdisk = '$ENV{'initrd'}'
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memory = $ENV{'memory'}
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name = '$ENV{'hostname'}'
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root = '/dev/$device1 ro'
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disk = [ '$image_vbd,$device1,w', '$swap_vbd,$device2,w' ]
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E_O_HEADER
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print FILE $network;
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close( FILE );
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}
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