MySQL-备份脚本

#!/bin/bash

#Script:MySQL_Backup.sh

#Version:Release 2.0

#Author:766083824@qq.com

#Date:2016-4-14

#以下配置信息请自己修改
mysql_user=”root” #MySQL备份用户
mysql_password=”123.com” #MySQL备份用户的密码
mysql_host=”localhost” #要备份的主机,一般为localhost
mysql_port=”3306” #MySQL端口号,一般为3306
backup_db_arr=(“wgl” “mysql” “”) #要备份的数据库名称,多个用空格分开隔开 如(“db1” “db2” “db3”)
backup_location=’/mnt’ #备份数据存放位置,末尾请不要带”/“,此项可以保持默认,程序会自动创建文件夹
expire_backup_delete=”ON” #是否开启过期备份删除 ON为开启 OFF为关闭
expire_days=30 #过期时间天数 默认为三天,此项只有在expire_backup_delete开启时有效

#以下配置请保持默认不要修改
backup_time=date +%Y-%m%d-%H-%M #定义备份详细时间
backup_Ymd=date +%Y-%m-%d #定义备份目录中的年月日时间
backup_3ago=date -d '3 days ago' +%Y%m%d #3天之前的日期
backup_dir=$backup_location/$backup_Ymd #备份文件夹全路径
welcome_msg=”—————Welcome to use MySQL backup tools!—————“ #欢迎语

#判断MYSQL是否启动,mysql没有启动则备份退出
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

#连接到mysql数据库,无法连接则备份退出
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……”

    #判断有没有定义备份的数据库,如果定义则开始备份,否则退出备份
    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 --routines --events --triggers --single-transaction -p$mysql_password $dbname &gt; $backup_dir/$dbname-$backup_time.sql`
                    #`mysqldump -h$mysql_host -P$mysql_port -u$mysql_user --routines --events --triggers --flush-logs --single-transaction -p$mysql_password $dbname &gt; $backup_dir/$dbname-$backup_time.sql`
                    flag=`echo $?` #本选项可以重新生成MySQL的二进制日志文件"--flush-logs"
                    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
    #如果开启了删除过期备份,则进行删除操作
    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 -empty -exec rm -rf {} \;`
             echo "Expired backup data delete complete!"
    fi
    echo "All database backup success! Think you!"
    exit

fi

还原数据注意事项:

mysql -u root -p123.com mysql < 2016-04-14/mysql-2016-0414-16-37.sql
当使用此命令时,必须有该“mysql”数据库!

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