Script for cloning libvirt machines

clone-vm.sh

#!/bin/bash

function usage() {
	echo "Usage: $0 NEW-NAME"
}

BASEVM_NAME=base-debian7
BASEVM_HDD=${BASEVM_NAME}-sda

NEWVM_NAME=$1
NEWVM_HDD=${NEWVM_NAME}-sda

STORAGEPOOL=default

VIRSH_FLAGS=

if [ "$NEWVM_NAME" == "" ]; then
	usage
	exit 1
fi

echo "Cloning domain $BASEVM_NAME to $NEWVM_NAME"
virt-clone -o $BASEVM_NAME -n $NEWVM_NAME

echo "Cloning volume $BASEVM_HDD to $NEWVM_HDD"
virsh $VIRSH_FLAGS vol-clone --pool $STORAGEPOOL $BASEVM_HDD $NEWVM_HDD

# edit the new vm's volume name
TEMPFILE=$(mktemp).xml
TEMPFILE2=$(mktemp).xml
virsh $VIRSH_FLAGS dumpxml $NEWVM_NAME > $TEMPFILE
xmlstarlet ed -u "//domain/devices/disk[1]/source/@volume" -v "$NEWVM_HDD" $TEMPFILE > $TEMPFILE2
virsh $VIRSH_FLAGS define $TEMPFILE2
rm $TEMPFILE $TEMPFILE2

echo "Created new domain $NEWVM_NAME."
echo "Now ssh or tty into your new vm (probably $BASEVM_NAME-2.local) and execute:"
echo "echo \"$NEWVM_NAME\" > /etc/hostname"
echo "sed -i \"s/$BASEVM_NAME/$NEWVM_NAME/g\" /etc/hosts"