virt-from

#!/bin/bash

base_format=raw
ram=1024
disksize=8G
force=

usage () {
	echo "$0: usage: $0 [ -r ram ] [ -s disksize ] [ -w network-spec ] [ -IQ ] base name [name...]"
}

while getopts r:s:w:IhfQ ch; do
	case $ch in
		(r) ram=$OPTARG;;
		(s) disksize=$OPTARG;;
		(I) no_instance=1;;
		(w) VIRT_INSTALL_ARGS="$VIRT_INSTALL_ARGS -w $OPTARG";;
		(f) force=1;;
		(Q) base_format=qcow2;;

		(h) usage; exit;;
		(\?) usage >&2; exit 2;;
	esac
done
shift $(( $OPTIND - 1 ))

base=$1
shift

base_pool=${base%/*}
base_vol=${base#*/}

for name in $*; do
	echo "--------------------------------------------------"
	echo "$name"
	echo

	if [ "$force" = 1 ]; then
		virsh vol-delete ${name}.img ${base_pool} > /dev/null 2>&1
	fi

	echo "Creating volume"
	virsh vol-create-as ${base_pool} ${name}.img ${disksize} \
		--format qcow2 \
		--backing-vol ${base_vol} \
		--backing-vol-format ${base_format} || exit 1

	virsh vol-info ${name}.img ${base_pool}

	if ! [ "$no_instance" = 1 ]; then
	echo "Creating instance"
	virt-install --noautoconsole \
		-n ${name} -r ${ram} \
		-w network=default,model=virtio \
		--cpu host \
		$VIRT_INSTALL_ARGS \
		--disk vol=${base_pool}/${name}.img,format=qcow2,bus=virtio \
		--import || exit 1
	fi
done