Clone lvm base image.

newdisk.sh

#!/bin/bash

VG=xxx
BASE=ubuntu-12.04-base
DEFSIZE=10G

if [ $# -lt 1 -o $# -gt 2 -o "$1" = -h -o "$1" = --help ]
then
	echo "Usage: $0 VolumeName [Size=$DEFSIZE]" >&2
	exit 1
fi

if [ -n "$2" ]
then
	SIZE=$2
else
	SIZE="$DEFSIZE"
fi
	

if [ ! -d "/dev/$VG/" ]
then
	echo $VG does not exist
	exit 2
fi

if [ ! -r /dev/$VG/$BASE ]
then
	echo Could not read $VG/$BASE
	exit 3
fi

echo lvcreate...
if ! lvcreate  -L $SIZE -n "$1" $VG
then
	echo lvcreate failed...
	exit 4
fi

dd if=/dev/$VG/$BASE of=/dev/$VG/$1 bs=4M &
ddpid=$!
( while sleep 20; do kill -USR1 $ddpid; done ) &
wpid=$!

wait $ddpid
kill $wpid