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2005-12-18 04:13:16 by steve

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Stub attempt to use Pod::Usage.
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steve
2005-12-18 04:13:16 +00:00
parent 6105f7493b
commit 0d6d48c67d
1 changed files with 147 additions and 52 deletions
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199
xen-create-image
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@@ -1,60 +1,148 @@
#!/usr/bin/perl -w
#
# Create a new Xen instances containing an installation of Debian
#
# This is a reasonably simple script which is more of a cheap hack
# than a production tool, however it does appear to work nicely for
# my own uses.
#
# The output of this script will be two files for each new instance:
#
# 1. One 2Gb file for the installations primary disk image.
# 2. One 128Mb file for the images swap partition.
#
# Usage:
#
# ./xen-create-image --hostname='vm03' --dir=/home/zen \
# --ip=192.168.1.93 --gateway=192.168.1.1 \
# --network=192.168.1.0 --mask=255.255.255.0 \
#
# The initial two arguments '--hostname' and '--dir' are mandatory,
# and control the hostname and output directory respectively. Other
# parameters are all network based, either give the list as shown above
# or use the '--dhcp' option to setup the host with a DHCP allocated
# IP address.
#
# 'dir' is used to create the output disk images which are referenced
# in the Xen configuration file. They will be created as:
#
#
# $dir/domains/
# $dir/domains/$hostname/disk.img
# $dir/domains/$hostname/swap.img
#
# The '/domains/' subdirectory, and sub-subdirectory named after the
# hostname will be created if necessary.
#
# Basic setup with your hosts file, resolv.conf, etc works just fine.
#
# The image will also have an OpenSSH server installed upon it, and
# an appropriate /etc/inittab file created.
#
# You are *strongly* advised to chroot() into the new instance once
# it has been setup to prune the users in the /etc/passwd file which
# will be copied from your hosts system.
#
#
# Steve
# --
# http://www.steve.org.uk/
#
# $Id: xen-create-image,v 1.8 2005-12-18 03:53:33 steve Exp $
#
=head1 NAME
xen-create-image - Create a new Xen instance of Debian Sarge.
=head1 SYNOPSIS
xen-create-image [options]
Help Options:
--help Show this scripts help information.
--manual Read this scripts manual.
Size / General options:
--size Set the size of the primary disk image.
--swap Set the size of the swap partition.
--fs Specify the filesystem type to use.
--memory Setup the amount of memory allocated to the instance.
Networking options:
--dhcp Setup the image to get an IP address via DHCP
--network Setup the network the host is upon.
--gateway Setup the iamge's network gateway.
--broadcast Setup the image's network broadcast address.
--mirror Setup the mirror to use when installing Sarge.
Mandatory options:
--dir Specify where the output images should go.
--hostname Set the images hostname.
=cut
=head1 OPTIONS
=over 8
=item B<--size>
Specify the size of the virtual images primary drive. The size may be
suffixed with either Mb, or Gb.
=item B<--swap>
Specify the size of the virtual images swap partition. The size may be
suffixed with either Mb, or Gb.
=item B<--help>
Show the brief help information.
=item B<--manual>
Read the manual, with examples.
=back
=cut
=head1 EXAMPLE
The following will create a 2Gb disk image, along with a 128Mb
swap file with Debian Sarge setup and running via DHCP.
xen-create-image --size=2Gb --swap=128Mb --dhcp \
--dir=/home/xen --hostname=vm01.my.flat
=cut
=head1 DESCRIPTION
This is a reasonably simple script which is more of a cheap hack
than a production tool, however it does appear to work nicely for
my own uses.
The output of this script will be two files for each new instance:
1. One 2Gb file for the installations primary disk image.
2. One 128Mb file for the images swap partition.
Usage:
The initial two arguments '--hostname' and '--dir' are mandatory,
and control the hostname and output directory respectively. Other
parameters are all network based, either give the list as shown above
or use the '--dhcp' option to setup the host with a DHCP allocated
IP address.
'dir' is used to create the output disk images which are referenced
in the Xen configuration file. They will be created as:
$dir/domains/
$dir/domains/$hostname/disk.img
$dir/domains/$hostname/swap.img
The '/domains/' subdirectory, and sub-subdirectory named after the
hostname will be created if necessary.
Basic setup with your hosts file, resolv.conf, etc works just fine.
The image will also have an OpenSSH server installed upon it, and
an appropriate /etc/inittab file created.
You are *strongly* advised to chroot() into the new instance once
it has been setup to prune the users in the /etc/passwd file which
will be copied from your hosts system.
=head1 AUTHOR
Steve
--
http://www.steve.org.uk/
$Id: xen-create-image,v 1.9 2005-12-18 04:13:16 steve Exp $
=cut
=head1 LICENSE
Copyright (c) 2005 by Steve Kemp. All rights reserved.
This module is free software;
you can redistribute it and/or modify it under
the same terms as Perl itself.
The LICENSE file contains the full text of the license.
=cut
use strict;
use File::Copy;
use File::Temp qw/ tempdir /;
use Getopt::Long;
use Pod::Usage;
#
@@ -80,6 +168,8 @@ my $SIZE="2000M"; # set with '--size=1000M[b] / 1G[b]"
my $SWAP_SIZE="128M"; # set with '--swapsize=... like --size"
my $MEMORY="96M"; # set with --memory=128Mb/128M
my $FS='ext3';
my $HELP;
my $MANUAL;
#
@@ -111,9 +201,14 @@ GetOptions(
"size=s", \$SIZE,
"swapsize=s", \$SWAP_SIZE,
"memory=s", \$MEMORY,
"fs=s", \$FS
"fs=s", \$FS,
"help", \$HELP,
"manual", \$MANUAL
);
pod2usage(1) if $HELP;
pod2usage(-verbose => 2 ) if $MANUAL;
#
# Check that the arguments the user has supplied are both