#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2019, 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.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to remove a VM image (RBD_SRC) from the image repository
###############################################################################

# ------------ Set up the environment to source common tools ------------
if [ -z "${ONE_LOCATION}" ]; then
    LIB_LOCATION=/usr/lib/one
else
    LIB_LOCATION=$ONE_LOCATION/lib
fi

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
CEPH_UTILS=${DRIVER_PATH}/ceph_utils.sh

source ${DRIVER_PATH}/../libfs.sh
source ${DRIVER_PATH}/../../etc/datastore/ceph/ceph.conf

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

DRV_ACTION=$1
ID=$2

TS=`date +"%Y-%m-%d %H:%M:%S"`
echo "${TS} [rm] - DRV_ACTION ${DRV_ACTION}" >>  /var/log/one/efs.log
echo "${TS} [rm] - ID ${ID}" >>  /var/log/one/efs.log

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/DATASTORE/TEMPLATE/BRIDGE_LIST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/ISCSI_LUN \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/POOL_NAME)

SRC="${XPATH_ELEMENTS[j++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[j++]}"
ISCSI_LUN="${XPATH_ELEMENTS[j++]}"
POOL_NAME="${XPATH_ELEMENTS[j++]}"

DST_HOST=`get_destination_host $ID`

#error_message "Remove stub"
#exit -1


if [ -z "$DST_HOST" ]; then
    error_message "Datastore template missing 'BRIDGE_LIST' attribute."
    exit -1
fi

echo "${TS} [rm] - SRC: ${SRC}" >>  /var/log/one/efs.log
echo "${TS} [rm] - ISCSI_LUN: ${ISCSI_LUN}" >>  /var/log/one/efs.log
echo "${TS} [rm] - ID: ${ID}" >>  /var/log/one/efs.log
echo "${TS} [rm] - POOL_NAME: ${POOL_NAME}" >>  /var/log/one/efs.log
echo "${TS} [rm] - DST_HOST: ${DST_HOST}" >>  /var/log/one/efs.log
#exit 0

DELETE_CMD=$(cat <<EOF
    set -e -o pipefail
    sudo ctldel ${SRC} ${ISCSI_LUN}
    sleep 1
    sudo service ctld reload
    sleep 5
    sudo zfs rename -p ${POOL_NAME}/one/${ID} ${POOL_NAME}/one/to-del/${ID}
    sleep 5
EOF
)

echo "${TS} [rm] - DELETE_CMD ON $DST_HOST: ${DELETE_CMD}" >>  /var/log/one/efs.log
ssh_exec_and_log $DST_HOST "$DELETE_CMD" \
                 "Error delete $ID image on $DST_HOST"


exit 0
