因為工作需要 , 每星期我要負責 backup SVN datebase 和 字典的 Content 資料 .
每次都需要 在 console 下執行一堆 command , 並且還讓自己的 PC 處於忙碌 , 修改 code 後要重新 build 都會很慢 , 想說 SVN 那台 server PC (後面簡稱 SVNPC) 都沒有事情作 , 好吧 , 寫一個 shell scrip 讓 SVNPC 定時自動幫我備份資料 .
linux 要自動執行 一個 shell 可以用 crontal -e 指令來填寫啟動時間 , 詳細使用方式請參考"鳥哥" 網頁 !!
http://linux.vbird.org/linux_basic/0430cron.php
crontab -l 的內容如下: (擷取 相關的 )
0 2 * * 6 /home/jeff/bin/backup-svn.sh ec510 auto > /home/jeff/backup-svn-ec510.txt 2>&1
接著 , 寫一個 備份的 shell scrip 吧 !! 首先 , 備份 SVN 資料 , 完整 shell 如下:
這個 shell 會將 /home/svn/repos/<project> 用 tar 的方式壓縮起來 , 並且壓縮的檔名為svn-db-<project>-<date>.tar.bz2 .
執行過程中可以將 message 會放在svnbackup-svn-<project>.txt 內 .
執行結束後 會將 .txt append 到 .log 內 , 如果 .log file 過大 , 會自動清除.
壓縮完畢後本地會留下 最近的 4 個壓縮檔 .
並將最新的 壓縮檔 copy 到 NAS 上.
檢查 NAS上的備份資料數 , 如果超過 20 個就會刪除 最舊的.
大功告成 , 每星期六早上2:00 開始備份 !!
#!/bin/sh
#
# vi:set ts=4:
NAS_KEEP_ITEM=20
LOCAL_KEEP_ITEM=4
## ===== defind echo color
COLOR_ECHO="echo -e" ## in Fedora the color echo need have -e argument.
COLOR_NORMAL="\033[0m"
COLOR_BOLD="\033[1m"
COLOR_RED="\033[31m"
COLOR_GREEN="\033[32m"
COLOR_YELLOW="\033[33m"
################################################
## check log file size and remove it if too large.
################################################
LOG_MAX_SZ=`echo "1048576 * 100" | bc -l `
if [ "$1" == "" ];then
echo " FIXME ****************** not finish "
exit
else
LOG_FILE=/home/${USER}/backup-svn-$1.log
TXT_FILE=/home/${USER}/backup-svn-$1.txt
fi
if [ -e ${LOG_FILE} ];then
_file_sz=`ls -l ${LOG_FILE} | awk '{print $5}'`
if [ ${_file_sz} -gt ${LOG_MAX_SZ} ];then
rm ${LOG_FILE}
fi
fi
################################################
## show some message .
################################################
if [ "$2" == "" ];then
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}"\
"## Back up $1 ...."\
"${COLOR_NORMAL}"
elif [ "$2" == "auto" ];then
_start_time=`date +%Y/%m/%d\ \ %k:%M:%S`
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}"\
"## Auto back up $1 at \"${_start_time}\" ...."\
"${COLOR_NORMAL}"
else
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_RED}"\
"## Bad command $2 ...."\
"${COLOR_NORMAL}"
exit 1
fi
################################################
## start back up svn .
################################################
_work_dir=`pwd`
_cur_date=`date +%Y%m%d`
if [ $1 == "" ];then
_svn_dir="/home/svn"
_bak_name="$_work_dir/svn-db-$_cur_date.tar.bz2"
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}" \
"Back up whole svn dir.. "\
"${COLOR_NORMAL}"
else
_svn_dir="/home/svn/repos/$1"
_bak_name="$_work_dir/svn-db-$1-$_cur_date.tar.bz2"
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}" \
"Back up $_svn_dir dir..." \
"${COLOR_NORMAL}"
fi
if [ "$_svn_dir" == "" ] || [ ! -e $_svn_dir ]; then
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_RED}" \
"## The SVN_DIR is not correct ..... "
"${COLOR_NORMAL}"
exit
else
if [ ! -e "$_bak_name" ];then
tar -jcf $_bak_name $_svn_dir
else
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_RED}" \
"## The file $_bak_name already exist , Please check it .. " \
"${COLOR_NORMAL}"
exit
fi
fi
################################################
## Remove local oldest back up file.
################################################
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}" \
"Remove local oldest backup file..." \
"${COLOR_NORMAL}"
if [ $1 == "" ];then
echo " FIXME ****************** not finish "
exit
else
_lo_lists=`find /home/${USER}/* -maxdepth 1 -type f | grep "$1" | sort -r | grep -n "tar.bz2" `
fi
## echo "_lo_lists:${_lo_lists}"
for _lo_del_item in ${_lo_lists} ; do
_lo_list_id=`echo "${_lo_del_item}" | sed 's/:.*//g' `
_lo_item_name=`echo ${_lo_del_item} | sed 's/.*://g' `
if [ ${_lo_list_id} -gt ${LOCAL_KEEP_ITEM} ] && [ ${_lo_item_name} != ${_bak_name} ] ;then \
rm -vf ${_lo_item_name}
fi
done
################################################
## Copy local backup file to NAS, back up.
################################################
## ===== define source and distnation dir .
if [ $1 == "" ];then
echo " FIXME ****************** not finish "
exit
else
BACKUP_DEST="/home/${USER}/NAS/Project/$1/backup/SVN_Backup"
fi
#### chekc NAS direct
if [ ! -e /home/${USER}/NAS ];then
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_RED}""#### NAS file system not exist !! ""${COLOR_NORMAL}"
exit 1
elif [ ! -e ${BACKUP_DEST} ];then
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_RED}""#### backup dir not exist !! ""${COLOR_NORMAL}"
exit 1
fi
#### Copy to tar file to NAS .
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}""#### Copy tar file to NAS ... !! ""${COLOR_NORMAL}"
cp -v ${_bak_name} ${BACKUP_DEST}/
################################################
#### Remove oldest backup file in NAS .
################################################
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}" \
"Remove NAS oldest backup file..." \
"${COLOR_NORMAL}"
if [ $1 == "" ];then
echo " FIXME ****************** not finish "
exit
else
_lists=`find ${BACKUP_DEST}/* | sort -r | grep -n ".tar.bz2"`
fi
## echo "_lists:${_lists}"
for _del_item in ${_lists} ; do
_list_id=`echo ${_del_item} | sed 's/:.*//g' `
_item_name=`echo ${_del_item} | sed 's/.*://g' `
if [ ${_list_id} -gt ${NAS_KEEP_ITEM} ];then \
rm -vf ${_item_name}
fi
done
################################################
## Show dome message.
################################################
if [ "$2" == "" ];then
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}"\
"## Back up $1 done ...."\
"${COLOR_NORMAL}"
elif [ "$2" == "auto" ];then
_end_time=`date +%Y/%m/%d\ \ %k:%M:%S`
${COLOR_ECHO} "${COLOR_BOLD}""${COLOR_GREEN}"\
"## Auto back up $1 done at \"${_end_time}\" ...."\
"${COLOR_NORMAL}"
fi
################################################
if [ -e ${TXT_FILE} ];then
cat ${TXT_FILE} >> ${LOG_FILE}
fi
################################################
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