#!/bin/bash
 
# 以下配置信息請自己修改
mysql_user="USER" #MySQL備份用戶
mysql_password="PASSWORD" #MySQL備份用戶的密碼
mysql_host="localhost"
mysql_port="3306"
mysql_charset="utf8" #MySQL編碼
backup_db_arr=("db1" "db2") #要備份的數(shù)據(jù)庫名稱，多個(gè)用空格分開隔開 如("db1" "db2" "db3")
backup_location=/opt/mysql  #備份數(shù)據(jù)存放位置，末尾請不要帶"/",此項(xiàng)可以保持默認(rèn)，程序會(huì)自動(dòng)創(chuàng)建文件夾
expire_backup_delete="ON" #是否開啟過期備份刪除 ON為開啟 OFF為關(guān)閉
expire_days=3 #過期時(shí)間天數(shù) 默認(rèn)為三天，此項(xiàng)只有在expire_backup_delete開啟時(shí)有效
 
# 本行開始以下不需要修改
backup_time=`date +%Y%m%d%H%M`  #定義備份詳細(xì)時(shí)間
backup_Ymd=`date +%Y-%m-%d` #定義備份目錄中的年月日時(shí)間
backup_3ago=`date -d '3 days ago' +%Y-%m-%d` #3天之前的日期
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是否啟動(dòng),mysql沒有啟動(dòng)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
 
# 連接到mysql數(shù)據(jù)庫，無法連接則備份退出
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 [ $flag != "0" ]; then
        echo "ERROR:Can't connect mysql server! backup stop!"
        exit
else
        echo "MySQL connect ok! Please wait......"
        # 判斷有沒有定義備份的數(shù)據(jù)庫，如果定義則開始備份，否則退出備份
        if [ "$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 $dbname --default-character-set=$mysql_charset | gzip > $backup_dir/$dbname-$backup_time.sql.gz`
                        flag=`echo $?`
                        if [ $flag == "0" ];then
                                echo "database $dbname success backup to $backup_dir/$dbname-$backup_time.sql.gz"
                        else
                                echo "database $dbname backup fail!"
                        fi
                        
                done
        else
                echo "ERROR:No database to backup! backup stop"
                exit
        fi
        # 如果開啟了刪除過期備份，則進(jìn)行刪除操作
        if [ "$expire_backup_delete" == "ON" -a  "$backup_location" != "" ];then
                 #`find $backup_location/ -type d -o -type f -ctime +$expire_days -exec rm -rf {} \;`
                 `find $backup_location/ -type d -mtime +$expire_days | xargs rm -rf`
                 echo "Expired backup data delete complete!"
        fi
        echo "All database backup success! Thank you!"
        exit
fi

#設(shè)置擁有者可讀寫，其他人不可讀寫執(zhí)行
chmod 600 /data/mysql3306_backup.sh
 
#賦予“可執(zhí)行”權(quán)限
chmod +x /data/mysql3306_backup.sh

#便捷編輯定時(shí)任務(wù)
crontab -e
 
#配置
00 01 * * * /data/mysql3306_backup.sh >> /data/mysql3306_backup.log 2>&1

#重載一遍crond
systemctl reload crond.service
 
#查看任務(wù)
crontab -l

ln -s  /apps/mysql/bin/mysql  /usr/bin 
ln -s  /apps/mysql/bin/mysqldumpl  /usr/bin