Бэкап сетевой шары (samba) в Linux по мотивам Windows Server Backup

#!/bin/bash # #     LVM-ThinVolume BackUp with rsync script set # #     (c) 2016 - #         Andrew Leshkevich (magicgts@gmail.com) # # #	This script set is free software; you can redistribute it and/or modify #	it under the terms of the GNU General Public License as published by the #       Free Software Foundation, either version 2 of the license or, at your #       option, any later version. # #	This program is distributed in the hope that it will be useful, #	but WITHOUT ANY WARRANTY; without even the implied warranty of #	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #	GNU General Public License for more details. # #	You should have received a copy of the GNU General Public License #	along with this program; if not, see <http://www.gnu.org/licenses/>. # #       For a list of supported commands, type 'thin_lv_backup help' # #	!!!	Please forgive me for bad english	!!! # ################################################################################################  ################################################################################################ #Mount the snapshot to the specified mount point, if a snapshot is not active, then activate it # Arguments: #   ${1} - Short path to Volume (in VG/LV format) #   ${2} - Mount point #   ${3} - Optional LMV Volume attribute # Returns: #   Return 0 if no errors ################################################################################################ mount_snapshot(){ 	local SRC=${1} 	local MNT_TGT=${2} 	[ "$#" -lt 2 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME SNAPSHOT> <MOUNT POINT> [<VOLUME ATTRIBUTES>]' && return 1 	if [ "$#" -eq 2 ]; then  		local ATTR=$(lvs --noheadings -o lv_attr ${SRC}) 	else 		local ATTR=${3} 	fi 	findmnt -nf --source /dev/${SRC} >/dev/null 2>&1 && echo "Skip: LV ${SRC} is already mounted!" && return 0 	findmnt -nf --target ${MNT_TGT} >/dev/null 2>&1 | grep -v -q ${MNT_TGT} && echo "Skip: the directory ${MNT_TGT} is already a mount point" && return 3 	if [ ! -d "${MNT_TGT}" ]; then 		mkdir -p "${MNT_TGT}" || echo "Error: Creating directory ${MNT_TGT}" || return 4 		echo "Info: directory ${MNT_TGT} has been created" 	fi 	find ${MNT_TGT} -prune -empty | grep -v -q ${MNT_TGT} && echo "Skip: ${MNT_TGT} directory is not empty" && return 5 	[[ ${ATTR} =~ .*a.* ]] || lvchange -ay -K ${SRC} || echo "Error: Volume Activation ${SRC}" || return 6 	mount -o ro,nouuid /dev/${SRC} ${MNT_TGT} || echo "Error: Mounting ${MNT_TGT}" || return 7 	return 0 }  ################################################################################################ # UnMount snaphot, deactivate volume and remove it mount point directory # Arguments: #   ${1} - Short path to Volume (in VG/LV format) # Returns: #   Return 0 if no errors ################################################################################################ umount_snapshot(){ 	local SRC=${1} 	local TGT 	[ "$#" -ne 1 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME SNAPSHOT>' && return 1 	local _TGT=("$( findmnt -nf --source /dev/${SRC} | cut -d ' ' -f 1 )") 	if [ ! -z "$_TGT" ]; then 		umount -A /dev/${SRC} || echo "Error: Umounting ${SRC}" || return 2 		for TGT in "${_TGT[@]}"; do 			find ${TGT} -prune -empty | grep -q "${TGT}" && rm --one-file-system -df ${TGT} 			[ -d "${TGT}" ] && echo "Info: Fail to remove target directory ${TGT}" 		done 	fi 	lvchange -an -K ${SRC} || echo "Error: Volume Deactivation ${SRC}" || return 3 	return 0 }  ################################################################################################ # Mount all associated snapshots of the volume to its origin mount points # All snapshots must be named on the template: <ORIGIN VOLUME NAME>-GMT-%Y.%m.%d-%H.%M.%S # Arguments: #   ${1} - Short path to Origin Volume (in VG/LV format) #   ${2} - Optional archive volume group, that used to mount all archive snapshots # Returns: #   Return 0 if no errors ################################################################################################ mount_all_snapshot(){ 	local SRC=${1} 	local A_VG=${2} 	local ATTR_S 	local SNAP 	[ "$#" -lt 1 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME> [<ARCHIVE VOLUME GROUP>]' && exit 1 	IFS=$'/' read -r -a ATTR_S <<< "${SRC}" 	[ "$#" -eq 2 ] && ATTR_S[0]=${A_VG} 	local SRC="$( findmnt -nf --source /dev/${SRC} | cut -d ' ' -f 1 )/" 	local DST_BASE="$( dirname ${SRC} )/.$( basename ${SRC} )/" 	while IFS='' read -r SNAP; do 		IFS=$' \t' read -r -a ATTR <<< "${SNAP}" 		local DST=${ATTR[0]//${ATTR_S[1]}-/} 		mount_snapshot ${ATTR_S[0]}/${ATTR[0]} ${DST_BASE}@${DST} ${ATTR[1]}  || echo "Error: mounting ${ATTR_S[0]}/${ATTR[0]}" 	done < <( lvs --noheadings -o lv_name,lv_attr -S Origin=${ATTR_S[1]} ${ATTR_S[0]} ) }  ################################################################################################ # UnMount and Remove snapshot # Arguments: #   ${1} - Short path to Snapshot Volume (in VG/LV format) # Returns: #   Return 0 if no errors ################################################################################################ remove_snaphot(){ 	local TGT=${1} 	local ATTR_S 	[ "$#" -ne 1 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME SNAPSHOT>' && return 1 	IFS=$'/' read -r -a ATTR_S <<< "${TGT}" 	[ -z $(lvs --noheadings -o Origin -S lv_name=${ATTR_S[1]} ${ATTR_S[0]}) ] && echo "Error: not a snapshot ${TGT}" && return 2 	umount_snapshot ${TGT} || echo "Error: umounting snapshot ${TGT}" || return 3 	lvremove -f /dev/${TGT} || echo "Error: removing snapshot ${TGT}" || return 4 	return 0 }  ################################################################################################ # Create and Mount it to hidden folder on top level with same name as Original mount point # Arguments: #   ${1} - Short path to Origin Volume (in VG/LV format) #   ${2} - Optional postfix, that replace default postfix GMT-%Y.%m.%d-%H.%M.%S # Returns: #   Return 0 if no errors ################################################################################################ create_snaphot(){ 	local TGT=${1} 	local ATTR_S 	[ "$#" -lt 1 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME> [<POSTFIX>]' && exit 1 	local DATE=$(date -u +GMT-%Y.%m.%d-%H.%M.%S) 	[ "$#" -eq 2 ] && DATE="${2}" 	IFS=$'/' read -r -a ATTR_S <<< "${TGT}" 	lvcreate -n ${ATTR_S[1]}-${DATE} -s /dev/${TGT} || echo "Error: Creating snapshot of ${TGT}" || return 2 	local SRC="$( findmnt -nf --source /dev/${TGT} | cut -d ' ' -f 1 )/" 	local DST_BASE="$( dirname $SRC )/.$( basename $SRC )/" 	mount_snapshot ${TGT}-${DATE} ${DST_BASE}@${DATE} || echo "Error: Mounting snapshot ${TGT}-${DATE}" || return 3 }  ################################################################################################ # Remove old snaphots and keep last N snapshot # Arguments: #   ${1} - Short path to Origin Volume (in VG/LV format) #   ${2} - Number of keeping snapshot # Returns: #   Return 0 if no errors ################################################################################################ remove_old_snapshot_copy(){ 	local TGT=${1} 	local NUM=${2} 	local SNAP 	local ATTR_S 	local ATTR 	[ "$#" -ne 2 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME> <NUMBER OF KEEP>' && return 1 	IFS=$'/' read -r -a ATTR_S <<< "${TGT}" 	while IFS='' read -r SNAP; do 		IFS=$' \t' read -r -a ATTR <<< "${SNAP}" 		local DST=${ATTR[0]//${ATTR_S[1]}-/} 		remove_snaphot ${ATTR_S[0]}/${ATTR[0]} || echo "Error: removing snapshot ${ATTR_S[0]}/${ATTR[0]}" 	done < <( (lvs --noheadings -O -lv_name -o lv_name -S Origin=${ATTR_S[1]} ${ATTR_S[0]}) | head -n -${NUM} ) 	return 0 }  ################################################################################################ # Prepare archive operation # Arguments: #   ${1} - Short path to Origin Volume (in VG/LV format) #   ${2} - Mount point for ${1} # Returns: #   Return 0 if no errors ################################################################################################ pre_archive(){ 	[ "$#" -ne 2 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME> <MOUNT POINT>' && return 1 	local VOL_SRC=${1} 	local MNT_TGT=${2} 	mkdir -p ${MNT_TGT} 	mount /dev/${VOL_SRC} ${MNT_TGT} || echo "Error: Mounting ${MNT_TGT}" || return 7 }  ################################################################################################ # Post archive operation: unmount target volume, remove its mount point, create its snaphot # Arguments: #   ${1} - Short path to Origin Volume (in VG/LV format) #   ${2} - Mount point for ${1} # Returns: #   Return 0 if no errors ################################################################################################ post_archive(){ 	[ "$#" -ne 3 ] && echo 'Error: expected <VOLUME GROUP>/<LOGICAL VOLUME> <MOUNT POINT> <VOLUME GROUP>/<LOGICAL VOLUME>' && return 1 	local VOL_SRC=${1} 	local MNT_TGT=${2} 	local TGT=${3} 	umount /dev/${VOL_SRC} && rm -rd ${MNT_TGT} && lvcreate -n ${TGT} -s /dev/${VOL_SRC} && return 0 	return 1 } ################################################################################################ # Create rsync archive # Arguments: #   ${1} - Short path to Origin Volume (in VG/LV format) #   ${2} - Name of archive Volume Group #   ${3} - Optional connection string in <user name>@<host name> format #   ${4} - Optional path to this script on remote machine #   ${5} - Optional prefix name for volume name on remote machine (<PREFIX>-<VOLUME NAME>-GMT-%Y.%m.%d-%H.%M.%S) #   ${6} - Optional also make local archive # Returns: #   Return 0 if no errors ################################################################################################ create_archive(){ 	local SRC=${1} 	local TGT=${2} 	local CONN=${3} 	local CALL=${4} 	local PREFIX=${5} 	local ATTR_S 	local ATTR_D 	local RESULTS 	local RET 	[ "$#" -lt 2 ] && echo 'Error: expected <ORIG VOLUME GROUP>/<ORIG LOGICAL VOLUME> <DST VOLUME GROUP> [<SSH CONNECT> <SCRIPT CALL> <PREFIX> [<LOCAL COPY?>]]' && return 1 	IFS=$'/' read -r -a ATTR_S <<< "${SRC}" 	IFS=$'/' read -r -a ATTR_D <<< "${TGT}" 	local SRC="$( findmnt -nf --source /dev/${ATTR_S[0]}/${ATTR_S[1]} | cut -d ' ' -f 1 )/" 	local DST_BASE="$( dirname $SRC )/.$( basename $SRC )/" 	create_snaphot ${ATTR_S[0]}/${ATTR_S[1]} archive_orig 	local DATE=$(date -u +GMT-%Y.%m.%d-%H.%M.%S)	 	if [ "$#" -ge 5 ]; then 		RESULTS=$(ssh ${CONN} "${CALL} pre_archive ${TGT}/${PREFIX}-${ATTR_S[1]} ${DST_BASE}@archive_dst") 		RET=$? 		echo "$RESULTS" 		[ "${RET}" -ne 0 ] && return ${RET} 		rsync -aAXx --delete ${DST_BASE}@archive_orig/ ${CONN}:${DST_BASE}@archive_dst &&\		 		RESULTS=$(ssh ${CONN} "${CALL} post_archive ${TGT}/${PREFIX}-${ATTR_S[1]} ${DST_BASE}@archive_dst ${PREFIX}-${ATTR_S[1]}-${DATE}") 		RET=$? 		echo "$RESULTS" 		[ "${RET}" -ne 0 ] && return ${RET} 	fi 	if [ "$#" -eq 2 ] || [ "$#" -eq 6 ]; then 		pre_archive ${TGT}/${ATTR_S[1]} ${DST_BASE}@archive_dst 		rsync -aAXx --delete ${DST_BASE}@archive_orig/ ${DST_BASE}@archive_dst &&\ 		post_archive ${TGT}/${ATTR_S[1]} ${DST_BASE}@archive_dst ${ATTR_S[1]}-${DATE} 		RET=$? 		[ "${RET}" -ne 0 ] && return ${RET} 		mount_snapshot ${TGT}/${ATTR_S[1]}-${DATE} ${DST_BASE}@${DATE} 	else 		 echo 'Error: expected <ORIG VOLUME GROUP>/<ORIG LOGICAL VOLUME> <DST VOLUME GROUP> [<SSH CONNECT> <SCRIPT CALL> <PREFIX> [<LOCAL COPY?>]]>' && return 1 	fi 	remove_snaphot ${ATTR_S[0]}/${ATTR_S[1]}-archive_orig } case ${1} in 		'help') 			[ -z "${2}" ] && echo -e "create - create snapshot and mount it\nmount - mount snapshot\numount unmount snapshot\nmount_all - mount all snapshot\n\ remove - remove snapshot\nremove_old - keep last n snapshot\ncreate_archive - create archive" 			case ${2} in 				'create') 					echo 'thin_lv_backup.sh create <VOLUME GROUP>/<LOGICAL VOLUME> [<POSTFIX>]' 				;; 				'mount') 					echo 'thin_lv_backup.sh mount <VOLUME GROUP>/<LOGICAL VOLUME SNAPSHOT> <MOUNT POINT> [<VOLUME ATTRIBUTES>]' 				;; 				'umount') 					echo 'thin_lv_backup.sh umount <VOLUME GROUP>/<LOGICAL VOLUME SNAPSHOT>' 				;; 				'mount_all') 					echo 'thin_lv_backup.sh mount_all <VOLUME GROUP>/<LOGICAL VOLUME> [<ARCHIVE VOLUME GROUP>]' 				;; 				'remove') 					echo 'thin_lv_backup.sh remove <VOLUME GROUP>/<LOGICAL VOLUME SNAPSHOT>' 				;; 				'remove_old') 					echo 'thin_lv_backup.sh remove_old <VOLUME GROUP>/<LOGICAL VOLUME> <NUMBER OF KEEP>' 				;; 				'create_archive') 					echo 'thin_lv_backup.sh create_archive <ORIG VOLUME GROUP>/<ORIG LOGICAL VOLUME> <DST VOLUME GROUP> [<SSH CONNECT> <SCRIPT CALL> <PREFIX> [<LOCAL COPY?>]]' 				;; 			esac 		;; 		'create') 			create_snaphot $2 $3 		;; 		'mount') 			mount_snapshot $2 $3 $4 		;; 		'umount') 			umount_snapshot $2 		;; 		'mount_all') 			mount_all_snapshot $2 $3 		;; 		'remove') 			remove_snaphot $2 		;; 		'remove_old') 			remove_old_snapshot_copy $2 $3 		;; 		'create_archive') 			create_archive $2 $3 $4 $5 $6 $7 		;; 		'pre_archive') 			pre_archive $2 $3 		;; 		'post_archive') 			post_archive $2 $3 $4 		;; esac 

Скрипт не идеален (пока я набиваю руку) и опирается на вашу добросовестность (нет проверки на корректность аргументов, только на количество). Однако, я постарался сделать его максимально безопасным для данных (он не удаляет тома, только snapshot, удаляет только пустые каталоги). Ваши предложения, по улучшению и исправлению, только приветствуются.