#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2012, OpenNebula Project Leads (OpenNebula.org)             #
#                                                                            #
# 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.                                             #
#--------------------------------------------------------------------------- #

# clone fe:SOURCE host:remote_system_ds/disk.i size
#   - fe is the front-end hostname
#   - SOURCE is the path of the disk image in the form DS_BASE_PATH/disk
#   - host is the target host to deploy the VM
#   - remote_system_ds is the path for the system datastore in the host

SRC=$1
DST=$2

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

. $TMCOMMON

#-------------------------------------------------------------------------------
# Set dst path and dir
#-------------------------------------------------------------------------------

IQN=$SRC
TARGET=`arg_path $SRC`
DST_PATH=`arg_path $DST`
DST_HOST=`arg_host $DST`
DST_DIR=`dirname $DST_PATH`

BASE_IQN=`echo $IQN|$CUT -d: -f1`
TARGET=`echo $IQN|$CUT -d: -f2`
LV_NAME=`echo $TARGET|$AWK -F. '{print $(NF)}'`
VG_NAME=`echo $TARGET|$AWK -F. '{print $(NF-1)}'`
TARGET_DEV="/dev/$VG_NAME/$LV_NAME"
TARGET_HOST=${TARGET%.$VG_NAME.$LV_NAME}

DISCOVER_CMD=$(cat <<EOF
    set -e
    mkdir -p $DST_DIR
    $SUDO $(iscsiadm_discovery "$TARGET_HOST")
    $SUDO $(iscsiadm_login "$IQN" "$TARGET_HOST")
    sleep 1
    DISK_BY_PATH=\$(ls /dev/disk/by-path/*$IQN-lun-1)
    ln -s "\$DISK_BY_PATH" "$DST_PATH"
EOF
)

ssh_exec_and_log "$DST_HOST" "$DISCOVER_CMD" \
        "Error registering $DST_HOST:$DEV"
exit 0
