clone

#!/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.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to copy a VM image (SRC) to the image repository as DST
# Several SRC types are supported
###############################################################################
# -------- Set up the environment to source common tools & conf ------------

# NOTE
# Inria uses a custom setup which uses both lvm and NFS
# a NFS share is mounted on frontend (rw) and all workers (ro mode)
# When an image need to be deployed on node, it is copied from the NFS to the local drives
# so that there is no write on NFS from nodes (and so no congestion)
# When an image is saved, it is backuped up from node to frontend *by ssh* and then
# wrote it on nfs, it is not really optimal but avoid giving rw mode on nodes
###

set -x

SRC=$1
DST=$2
VM_ID=$3
DS_ID=$4


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

DRIVER_PATH=$(dirname $0)

source $TMCOMMON
source ${DRIVER_PATH}/../../datastore/lvm/lvm.conf

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

SRC_HOST=`arg_host $SRC`
SRC_PATH=`arg_path $SRC`

DST_PATH=`arg_path $DST`
DST_HOST=`arg_host $DST`
DST_DIR=`dirname $DST_PATH`

DISK_ID=$(echo $DST_PATH|awk -F. '{print $NF}')
SIZE=$((`ls -lk $(readlink -f $SRC_PATH) |awk '{ print $5 }'`))

#-------------------------------------------------------------------------------
# Get other LVM related fields
#-------------------------------------------------------------------------------

SRC_LV_NAME=`echo $SRC_PATH |  awk -F'/' '{ print $NF }'`
LV_NAME=lv-one-$VM_ID-$DISK_ID


function return_with_error {
    log "Some steps failed. Please check log above"
    log "Remove source lv if exists because it can be incoherent"
    exec_and_log "$SSH $DST_HOST $SUDO $LVS | $GREP -qs $SRC_LV_NAME && $LVREMOVE $SRC_LV_NAME"                                         #delete_src_lv
    exit 127                                                                                                                            #leave_with_error
}

SNAP_SIZE=$((SIZE * 11 / 10)) #bc does not support float, so *11 / 10 is to add 10%
SRC_LV_NAME=`echo $SRC_PATH |  awk -F'/' '{ print $NF }'`
DEV="/dev/$VG_NAME/$LV_NAME"

log "copy $SRC_LV_NAME on $DST_HOST"                                                                           
# The pvs |grep stuff allows stripping across PVs, should be updated to only allow stripping on PVs used by the VG
ssh_exec_and_log "$DST_HOST" "$SUDO $LVCREATE -i \$($SUDO pvs --noheadings |grep $VG_NAME | wc -l) -L${SIZE}k -n $LV_NAME $VG_NAME" "Error creating source image $SRC_LV_NAME"
ssh_exec_and_log "$DST_HOST" "eval cat $SRC_PATH | $SUDO $DD of=/dev/$VG_NAME/$LV_NAME bs=1M" || return_with_error     

exec_and_log "$SUDO $MKDIR -p $(dirname $DST_PATH)"
exec_and_log "$SUDO $CHOWN oneadmin $(dirname $DST_PATH)"
exec_and_log "ln -s /dev/$VG_NAME/$LV_NAME $DST_PATH"
trap - INT TERM EXIT

echo "$LVM_SOURCE"