当mha进行failover 完成或由于错误停止时，我们可以使用send_report以邮件报警的方式来获得failover报告，以便我们及时了解现在的数据库状态。

首先需要修改脚本：

[root@rd-mysql-test4 mha]# cat /usr/local/bin/send_report

#!/usr/bin/perl

# Copyright (C) 2011 DeNA Co.,Ltd.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

#along with this program; if not, write to the Free Software

# Foundation, Inc.,

# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

## Note: This is a sample script and is not complete. Modify the script based on your environment.

use strict;

use warnings FATAL => 'all';

use Mail::Sender;

use Getopt::Long;

#new_master_host and new_slave_hosts are set only when recovering master succeeded

my ( $dead_master_host, $new_master_host, $new_slave_hosts, $subject, $body );

my $smtp='smtp.163.com';

my $mail_from='from@163.com';

my $mail_user='from@163.com';

my $mail_pass='password';

#my $mail_to=['to1@qq.com','to2@qq.com'];

my $mail_to='to@qq.com';

GetOptions(

'orig_master_host=s' => \$dead_master_host,

'new_master_host=s' => \$new_master_host,

'new_slave_hosts=s' => \$new_slave_hosts,

'subject=s' => \$subject,

'body=s' => \$body,

);

# Do whatever you want here

mailToContacts($smtp,$mail_from,$mail_user,$mail_pass,$mail_to,$subject,$body);

sub mailToContacts {

my ($smtp, $mail_from, $mail_user, $mail_pass, $mail_to, $subject, $msg ) = @_;

open my $DEBUG, ">/var/log/masterha/app1/mail.log"

or die "Can't open the debugfile:$!\n";

my $sender = new Mail::Sender {

ctype=> 'text/plain;charset=utf-8',

encoding=> 'utf-8',

smtp=> $smtp,

from=> $mail_from,

auth=> 'LOGIN',

TLS_allowed=> '0',

authid=> $mail_user,

authpwd=> $mail_pass,

to=> $mail_to,

subject=> $subject,

debug=> $DEBUG

};

$sender->MailMsg(

{

msg => $msg,

debug => $DEBUG

}

) or print $Mail::Sender::Error;

return 1;

}

exit 0;

然后修改配置文件，只需添加report_script即可

[server default]

manager_log=/var/log/masterha/app1/manager.log

manager_workdir=/var/log/masterha/app1

master_binlog_dir=/data/mysql

master_ip_failover_script=/usr/local/bin/master_ip_failover

master_ip_online_change_script=/usr/local/bin/master_ip_online_change

password=123456

ping_interval=1

remote_workdir=/tmp

repl_password=123456

repl_user=rep

report_script=/usr/local/bin/send_report

ssh_port=22

ssh_user=root

user=mha

[server1]

hostname=10.10.10.56

port=3306

[server2]

hostname=10.10.10.57

port=3306

[server3]

hostname=10.10.10.58

port=3306

最后开启mha监控，停止master来触发failover，在最后我们可以看到生成了failover报告并send_report。

----- Failover Report -----

app1: MySQL Master failover 10.10.10.57(10.10.10.57:3306) to 10.10.10.56(10.10.10.56:3306) succeeded

Master 10.10.10.57(10.10.10.57:3306) is down!

Check MHA Manager logs at rd-mysql-test4:/var/log/masterha/app1/manager.log for details.

Started automated(non-interactive) failover.

Invalidated master IP address on 10.10.10.57(10.10.10.57:3306)

The latest slave 10.10.10.56(10.10.10.56:3306) has all relay logs for recovery.

Selected 10.10.10.56(10.10.10.56:3306) as a new master.

10.10.10.56(10.10.10.56:3306): OK: Applying all logs succeeded.

10.10.10.56(10.10.10.56:3306): OK: Activated master IP address.

10.10.10.58(10.10.10.58:3306): This host has the latest relay log events.

Generating relay diff files from the latest slave succeeded.

10.10.10.58(10.10.10.58:3306): OK: Applying all logs succeeded. Slave started, replicating from 10.10.10.56(10.10.10.56:3306)

10.10.10.56(10.10.10.56:3306): Resetting slave info succeeded.

Master failover to 10.10.10.56(10.10.10.56:3306) completed successfully.

Thu Aug 13 11:27:36 2015 - [info] Sending mail..

Unknown option: conf