mysqlバックアップshellスクリプト

#!/bin/bash
#cript:mysqlbackup.sh
#Version:Release 2.0
#author:www.dba-china.com
#date:2011-10-27
#           
mysql_user="root" #MySQL    
mysql_password="password" #MySQL       
mysql_host="127.0.0.1" #      ，   localhost
mysql_port="3306" #MySQL   ，   3306
backup_db_arr=("cms" "ad") #         ，           ("db1" "db2" "db3")
backup_location='/home/lhb/backup_mysql_data'  #        ，      "/",        ，          
expire_backup_delete="ON" #           ON    OFF   
expire_days=40 #            ，     expire_backup_delete     
#             
backup_time=`date +%Y%m%d%H%M`  #        
backup_Ymd=`date +%Y%m%d` #             
backup_3ago=`date -d '3 days ago' +%Y%m%d` #3      
backup_dir=$backup_location/$backup_Ymd  #        
welcome_msg="Welcome to use MySQL backup tools!" #   
#  MYSQL    ,mysql         
mysql_ps=`ps -ef |grep mysql |wc -l`
mysql_listen=`netstat -an |grep LISTEN |grep $mysql_port|wc -l`
if [ [$mysql_ps == 0] -o [$mysql_listen == 0] ]; then
        echo "ERROR:MySQL is not running! backup stop!"
        exit
else
        echo $welcome_msg
fi
#   mysql   ，         
mysql -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password <<end
use mysql;
select host,user from user where user='root' and host='localhost';
exit
end
flag=`echo $?`
if [ $flag != "0" ]; then
        echo "ERROR:Can't connect mysql server! backup stop!"
        exit
else
        echo "MySQL connect ok! Please wait......"
        #             ，         ，      
        if [ "$backup_db_arr" != "" ];then
                #dbnames=$(cut -d ',' -f1-5 $backup_database)
                #echo "arr is (${backup_db_arr[@]})"
                for dbname in ${backup_db_arr[@]}
                do
                               echo "database $dbname backup start..."
                        `mkdir -p $backup_dir`
                        `mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password $dbname > $backup_dir/$dbname$backup_time.sql`
                        flag=`echo $?`
                        if [ $flag == "0" ];then
                                echo "database $dbname success backup to $backup_dir/$dbname$backup_time.sql"
                        else
                                echo "database $dbname backup fail!"
                        fi
                            
                done
        else
                echo "ERROR:No database to backup! backup stop"
                exit
        fi
        #           ，       
        if [ "$expire_backup_delete" == "ON" -a  "$backup_location" != "" ];then
                `find $backup_location/ -type d -o -type f -ctime +$expire_days -exec rm -rf {} \;`
        `find $backup_location/ -type d -empty -exec rm -rf {} \;`
                 echo "Expired backup data delete complete!"
        fi
        echo "All database backup success! Think you!"
        exit
fi