mysql高可用之MHA(补充2)--邮件报警

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 $DEBUG, ">/var/log/masterha/app1/mail.log"
or die "Can't open the debug	file:$!\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

我们收到的邮件如下：