#!/bin/bash
###############################################
# NAME: mysql_tool.sh
# AUTH: GuZhiQiang
# DATE: 2011-12-13
###############################################
#Setting
#设置数据库名，数据库登录名，密码，备份路径，日志路径，数据文件位置，以及备份方式
#默认情况下备份方式是tar，还可以是mysqldump,mysqldotcopy
#运行方式：./mysql_tool.sh database tar
DBName=$1
DBUser=root
DBPasswd=***
BackupPath=/data/sqls/
LogFile=/data/db.log
DBPath=/var/lib/mysql/
BackupMethod=$2
#BackupMethod=mysqldump
#BackupMethod=mysqlhotcopy
#BackupMethod=tar
#Setting End 
 
NewFile="$BackupPath""$DBName"_$(date +%y%m%d).tgz
DumpFile="$DBName"_$(date +%y%m%d).sql
OldFile="$BackupPath""$DBName"_$(date +%y%m%d --date='5 days ago').tgz 
 
CHECK_FOR_START () {
 
if [ $(id -u) != "0" ]; then
    echo "Error: You must be root to run this script, please use root to install!"
    exit 1
fi
 
if [ "$DBName" != "" ] && [ "$BackupMethod" != "" ];then
  LOG_HEAD_INFO
  DELETE_OLDFILE
  BACKUP_START
else
  LOG_HEAD_INFO
  echo "Command error!!!" >> $LogFile
  echo "Input[#]:./mysqlbak_4399.sh {database} {mysqldump|mysqlhotcopy|tar} " >> $LogFile
fi
}
 
LOG_HEAD_INFO () {
echo "-------------------------------------------" >> $LogFile
echo $(date +"%y-%m-%d %H:%M:%S") >> $LogFile
echo "--------------------------" >> $LogFile
}
 
DELETE_OLDFILE() {
#删除5天前的旧文件
if [ -f $OldFile ]
then
   rm -f $OldFile >> $LogFile 2>&1
   echo "[$OldFile]Delete Old File Success!" >> $LogFile
else
   echo "[$OldFile]No Old Backup File!" >> $LogFile
fi
}
 
BACKUP_START() {
if [ -f $NewFile ]
then
   echo "[$NewFile]The Backup File is exists,Can't Backup!" >> $LogFile
else 
 
  ##使用何种备份方式
   case $BackupMethod in
   mysqldump)
      if [ -z $DBPasswd ]
      then
         mysqldump -u $DBUser --opt $DBName > $DumpFile
      else
         mysqldump -u $DBUser -p$DBPasswd --opt $DBName > $DumpFile
      fi
      tar czvf $NewFile $DumpFile >> $LogFile 2>&1
      echo "[$NewFile]Backup Success!" >> $LogFile
      rm -f $DumpFile
      ;;
   mysqlhotcopy)
      rm -f $DumpFile
      mkdir $DumpFile
      if [ -z $DBPasswd ]
      then
         mysqlhotcopy -u $DBUser $DBName $DumpFile >> $LogFile 2>&1
      else
         mysqlhotcopy -u $DBUser -p $DBPasswd $DBName $DumpFile >>$LogFile 2>&1
      fi
      tar czvf $NewFile $DumpFile >> $LogFile 2>&1
      echo "[$NewFile]Backup Success!" >> $LogFile
      rm -f $DumpFile
      ;;
   tar)
      /etc/init.d/mysqld stop >/dev/null 2>&1
      tar czvf $NewFile $DBPath$DBName >> $LogFile 2>&1
      /etc/init.d/mysqld start >/dev/null 2>&1
      echo "[$NewFile]Backup Success!" >> $LogFile
      ;;
   esac
fi
}
 
CHECK_FOR_START && echo "-------------------------------------------" >> $LogFile