mysql数据库自动备份，并发送邮件通知

一 前提 系统环境 ：centos6.1 脚本作用 ：备份指定服务器上的指定数据库，并通过scp传送到另一台备份主机，然后发送备份是否成功邮件到指定邮箱 思路 ：首先在备份脚本中把备份报告导出为一个db_backup.log文件，然后邮件脚本会把这个log内容作为邮件内容发

一 前提

系统环境：centos6.1

脚本作用：备份指定服务器上的指定数据库，并通过scp传送到另一台备份主机，然后发送备份是否成功邮件到指定邮箱

思路：首先在备份脚本中把备份报告导出为一个db_backup.log文件，然后邮件脚本会把这个log内容作为邮件内容发送给指定用户，也就实现了邮件通知

说明：如果需要备份到远程主机，需要首先做好ssh密钥认证，scp要使用到

二 备份脚本

备份脚本用法:如果需要备份某个数据库，在脚本后面添加一条备份命令，像下面这样

backup_db 10.90.5.50 dbname mysql 123456 innodb
函数名 mysql所在IP 所要备份的数据库名 连接数据库用户名 密码 数据库引擎类型

#!/bin/bash
#name：backup_db.sh
#Purpose: backup mysql database
#Author: xxx
#Date: 2014-08-26
#useage：backup_db IP databasename user password dbtype
#example：backup_db 10.90.5.50 dbname mysql 123456 innodb

#备份时间
DATE=`date -d"today" +%Y%m%d_%H%M%S`
#前一个时间
DATE2=`date -d"1 month ago" +%Y%m%d_%H%M%S`
#备份目录
HOMEDIR=/data/dbdata_backup
MYSQLDUMP='/usr/local/mysql/bin/mysqldump'
#删除上一次备份报告
rm -f $HOMEDIR/db_backup.log


#################################################################function############################################################################
#backup function
backup_db ()
{
	if [ $# -ne 5 ];then
		echo "Usage: backupdb IP dbname user password dbtype"
		echo "Please try again"
		exit 1
	fi

	IP=$1
	DBNAME=$2
	USER=$3
	PASSWORD=$4
	DBTYPE=$5

	echo "--------------------------start backup $IP $DBNAME db-------------------------------------" >> $HOMEDIR/db_backup.log
	echo "start date: `date +%Y%m%d_%H%M%S`" >> $HOMEDIR/db_backup.log
	if [ $DBTYPE = "innodb" ];then
		$MYSQLDUMP -u$USER -p$PASSWORD -h$IP --single-transaction --flush-logs --routines --events --master-data=2 "$DBNAME" > $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql
		if [ $? -ne 0 ];then
			echo "$IP $DBNAME $DBTYPE db  backup is not success ,please check it out!" >> $HOMEDIR/db_backup.log
			else
			echo "$IP $DBNAME $DBTYPE db  backup is success!" >> $HOMEDIR/db_backup.log
		fi
	else 
		$MYSQLDUMP -u $USER -p$PASSWORD -h$IP -l --flush-logs --routines --events --master-data=2 "$DBNAME" > $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql
                if [ $? -ne 0 ];then
                        echo "$IP $DBNAME $DBTYPE db  backup is not success ,please check it out!" >> $HOMEDIR/db_backup.log
                        else
                        echo "$IP $DBNAME $DBTYPE db  backup is success!" >> $HOMEDIR/db_backup.log
                fi
	fi
	echo "End date: `date +%Y%m%d_%H%M%S`" >> $HOMEDIR/db_backup.log
	gzip $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql
	SIZE=`du -sh $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql.gz | awk '{print $1}'`
	echo "the file size is: $SIZE" >> $HOMEDIR/db_backup.log
	echo "--------------------------end backup $IP $DBNAME db-------------------------------------" >> $HOMEDIR/db_backup.log
	
	#delete the backup files which were create two month ago
	rm -f $HOMEDIR/$DBNAME/${DBNAME}_$DATE2.sql.gz
}


#scp function : scp the backup file to another server as different place backup
scp_function ()
{
        if [ $# -ne 1 ];then
                echo "Usage: scp_function dbname"
                echo "Please try again"
                exit 1
        fi

	DBNAME=$1
	scp -P52814  -i /home/lj/.ssh/id_rsa $HOMEDIR/$DBNAME/${DBNAME}_$DATE.sql.gz lj@10.90.5.50:/data/dbbackup/
	if [ $? -ne 0 ];then
		echo "$DBNAME db backup data transfer is not success ,please check it out!" >> $HOMEDIR/db_backup.log
	else
		echo "$DBNAME db backup data transfer is success!" >> $HOMEDIR/db_backup.log
	fi
}

##########################################################################function##################################################################

#使用perl命令执行邮件脚本，以发送备份报告，其中的sendmail.pl为下面发邮件脚本
perl /home/scripts/sendmail.pl

三 发送邮件脚本

脚本中需要安装插件，请确认你的系统中已安装Net::SMTP_auth;Text::Iconv;MIME::Base64;Data::Dumper

#!/usr/bin/perl
#Author: xxx
#name：sendamil.pl
#Purpose: Send file comment email to people
#Date: 2014-08-26

#请确认下面插件已安装
use strict;
use Net::SMTP_auth;
use Text::Iconv;
use MIME::Base64;
use Data::Dumper;

#邮件服务器地址
my $mailhost     = 'mail.qq.com';
#邮件从哪个邮箱发出（from）
my $mailfrom     = '[e-mail]';
#邮件需要发给谁
my @mail_account = ('[e-mail]');
#邮件发送方邮箱
my $mailuser     = '[e-mail]';
#发送方邮箱密码
my $mailpasswd   = 'jiankong';
#db_backup.log中的内容会作为邮件内容发送，db_backup.log为备份脚本所导出的此次备份报告
my $filename	= '/data/dbdata_backup/db_backup.log';
#邮件主题
my $subject	= 'dazhima_db_backup';

open(MYFILE,"$filename") || die "$!";
my $text;
while (){
  $text .= $_."
";
}
close(MYFILE);

&SendMail($text,$subject);

sub SendMail() {
    my $text    = $_[0];
    my $subject = $_[1];
    my $smtp    = Net::SMTP_auth->new( 'mail.medees.com', Timeout => 60, Debug => 0, Hello => 'medees.com' ) or die "Error.\n";
    $smtp->auth( 'LOGIN', $mailuser, $mailpasswd );

    foreach my $mailto (@mail_account) {
        $smtp->mail($mailfrom);
        $smtp->to($mailto);
        $smtp->data();
        $smtp->datasend("Content-Type:text/html;charset=utf-8\n");
        $smtp->datasend("Content-Transfer-Encoding:base64\n");
        $smtp->datasend( "From:=?utf-8?B?" . encode_base64( 'JianKong', '' ) . "?=  \n" );
        $smtp->datasend( "To:=?utf-8?B?" . encode_base64( 'JianKong', '' ) . "?=  \n" );
        $smtp->datasend( "Subject:=?utf-8?B?" . encode_base64( $subject, '' ) . "?=\n\n" );
        $smtp->datasend();

        $smtp->datasend( encode_base64( $text, '' ) . " \n" );
        $smtp->dataend();
    }

    $smtp->quit;
}

四 使用

添加一条crontab记录

0 2 * * * /var/script/db_backup.sh

在每天的2点执行备份脚本