keepalived双机热备实现故障时发送邮件通知
Posted wgwyanfs
tags:
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master: 192.168.1.241
backup: 192.168.1.242
漂移IP:192.168.1.243
1。主备调度器都安装keepalived软件
安装步骤例如以下:
./configure --prefix=/usr/local/keepalived && make && make install
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
service keepalived start
可以先用命令 service keepalived start 启动进行測试,看进程可以启动。注意查看log.
2,主调度器配置例如以下:
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_sync_group VG_1 {
group {
VI_1
}
notify_master /etc/keepalived/sendmail.pl
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.243
}
}
2,备调度器配置例如以下:
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_sync_group VG_1 {
group {
VI_1
}
notify_master /etc/keepalived/sendmail.pl
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.243
}
}
3。发送邮件的perl脚本sendmail.pl内容例如以下:
注意主备发送邮件的标题是不一致的。仅仅要你能识别漂移IP在哪台server上就可以。
#!/usr/bin/perl -w use Net::SMTP_auth; use strict; my $mailhost = ‘smtp.163.com‘; my $mailfrom = ‘[email protected]‘; my @mailto = (‘[email protected]‘); my $subject = ‘keepalived up on backup‘; my $text = "正文\n第二行位于此。"; my $user = ‘[email protected]‘; my $passwd = ‘xxxxxxx‘; &SendMail(); ############################## # Send notice mail ############################## sub SendMail() { my $smtp = Net::SMTP_auth->new( $mailhost, Timeout => 120, Debug => 1 ) or die "Error.\n"; $smtp->auth( ‘LOGIN‘, $user, $passwd ); foreach my $mailto (@mailto) { $smtp->mail($mailfrom); $smtp->to($mailto); $smtp->data(); $smtp->datasend("To: $mailto\n"); $smtp->datasend("From:$mailfrom\n"); $smtp->datasend("Subject: $subject\n"); $smtp->datasend("\n"); $smtp->datasend("$text\n\n"); $smtp->dataend(); } $smtp->quit; }
说明:
a、因为keeplived自带的发送邮件机制是个鸡肋,假设本地不启动25port就无法实现邮件发送,就琢磨着能不能通过自己定义脚本来实现。真的是非常幸运,就採用了认证的方式。
b、其它的配置说明就不具体讲了。网上非常多资料。
4。測试keepalived
主备调度器都开启80port,两台server上的測试内容不一致,这样更方便測试。
##########################
#所需安装模块
#use Net::SMTP
#Authen::SASL
##########################
#$stmp->auth(‘user‘,‘pass‘);
#大部分SMTPserver为了防止 spam /垃圾邮件,就须要用户验证身份。
#此方法须要另外安装模块:Authen::SASL, 此模块可能系统不自带
##########################
#Debug => 1
#此段代码用于測试之用,所以开启了Debug。一般測试一次完成,正式使用的话会关闭它。
注:可在命令行界面直接运行:/etc/keepalived/sendmail.pl,看看是否能发送邮件成功,假设失败的话则须要安装Net::SMTP_auth模块
安装方法:
yum -y install perl-CPAN
cpan Net::SMTP_auth
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