mysql 備份shell 腳本

#!/bin/bash
#cript:mysqlbackup.sh
#Version:Release 2.0
#author:www.dba-china.com
#date:2011-10-27
#如下配置信息請本身修改
mysql_user="root" #MySQL備份用戶
mysql_password="password" #MySQL備份用戶的密碼
mysql_host="127.0.0.1" #要備份的主機，通常爲localhost
mysql_port="3306" #MySQL端口號，通常爲3306
backup_db_arr=("cms" "ad") #要備份的數據庫名稱，多個用空格分開隔開 如("db1" "db2" "db3")
backup_location='/home/lhb/backup_mysql_data'  #備份數據存放位置，末尾請不要帶"/",此項能夠保持默認，程序會自動建立文件夾
expire_backup_delete="ON" #是否開啓過時備份刪除 ON爲開啓 OFF爲關閉
expire_days=40 #過時時間天數 默認爲三天，此項只有在expire_backup_delete開啓時有效
#如下配置請保持默認不要修改
backup_time=`date +%Y%m%d%H%M`  #定義備份詳細時間
backup_Ymd=`date +%Y%m%d` #定義備份目錄中的年月日時間
backup_3ago=`date -d '3 days ago' +%Y%m%d` #3天以前的日期
backup_dir=$backup_location/$backup_Ymd  #備份文件夾全路徑
welcome_msg="Welcome to use MySQL backup tools!" #歡迎語
#判斷MYSQL是否啓動,mysql沒有啓動則備份退出
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 $welcome_msg
fi
#鏈接到mysql數據庫，沒法鏈接則備份退出
mysql -h$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 [ $flag != "0" ]; then
        echo "ERROR:Can't connect mysql server! backup stop!"
        exit
else
        echo "MySQL connect ok! Please wait......"
        #判斷有沒有定義備份的數據庫，若是定義則開始備份，不然退出備份
        if [ "$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
        #若是開啓了刪除過時備份，則進行刪除操做
        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