Down'n'dirty KVM backup

#!/bin/bash

#set up variables
lvmrootdir=/dev/data1/
qemuconfdir=/etc/libvirt/qemu/
backupdir=/mnt/external/vmbackups/
#lvm snapshot variable below

#get a list of all virtual machines on this host
virsh list --all

read -p "Please specify the (exact) name of the VM you would like to backup: " -e vmname

echo Backing up $lvmrootdir$vmname
echo Associated config file is $qemuconfdir$vmname.xml

#check for existing backup folder
if [ -d $backupdir$vmname ]; then
echo Directory $backupdir$vmname already exists.
else
mkdir $backupdir$vmname
echo Creating $backupdir$vmname
fi
echo Creating a snapshot...
lvcreate -L10G -s -n SNAPSHOT$vmname $lvmrootdir$vmname
snapshotdir=$lvmrootdir"SNAPSHOT"$vmname

echo Backing up the virtual disc, this may take a while.

dd if=$snapshotdir of=$backupdir$vmname/$vmname.dd

echo Disc backup complete, compressing the backup.

gzip -v $backupdir$vmname/$vmname.dd

echo Copying config file to $backupdir$vmname/$vmname.xml

cp $qemuconfdir$vmname.xml $backupdir$vmname/$vmname.xml
echo Cleaning up...
lvremove -f $snapshotdir
echo Backup completed
echo Exiting...

exit