snap_flatten

#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2017, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

DRV_ACTION=$1
ID=$2

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
    DATASTORES=/var/lib/one/datastores
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
    DATASTORES=$ONE_LOCATION/var/datastores
fi

. $TMCOMMON

DRIVER_PATH=$(dirname $0)

# -------- Get image and datastore arguments from OpenNebula core ------------

DRV_ACTION=$1
ID=$2

XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <($XPATH     /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/TARGET_SNAPSHOT \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TM_MAD )

DISK_SRC="${XPATH_ELEMENTS[j++]}"
SNAP_ID="${XPATH_ELEMENTS[j++]}"
TM_MAD="${XPATH_ELEMENTS[j++]}"

SRC_PATH=`arg_path $SRC`

SYSTEM_DS_PATH=$(dirname ${SRC_PATH})

DISK_ID=$(basename ${SRC} | cut -d. -f2)
DISK_PATH="${DISK_SRC}"

SNAP_DIR="${DISK_PATH}.snap"
SNAP_PATH="${SNAP_DIR}/${SNAP_ID}"

if [ "$TM_MAD" = "qcow2" ]; then
    qemu-img convert -O qcow2 ${SNAP_PATH} ${DISK_PATH}.tmp
    mv "${DISK_PATH}.tmp" "${DISK_PATH}"
else
    mv ${SNAP_PATH} ${DISK_PATH}
fi

rm -rf ${SNAP_DIR}