使用swatch实时监控cisco路由器(一)
swatch可以实时监控系统日志文件,在匹配到特定的事件时执行指定的动作。swatch所监控的事件以及对应事件的动作都存放在swatch的配置文件中。预设的配置文件为用户根目录下的.swatchrc。 swatch的功能很多,我这里主要是通过swatch来监控Cisco路由器和H3C交换机端口状态。 我的系统环境为:Gentoo-2007.0_amd64 准备: 1、配置syslog-ng日志服务器以接收日志 2、配置cisco路由器和H3C交换机将日志发送到日志服务器 一、从这里下载最新版的swatch,目前的最新版本是 http://sourceforge.net/project/showfiles.php?group_id=68627 二、安装 #tar swatch-3.2.2.tar.gz #cd swatch-3.2.2 #perl Makefile.PL 如果出现: Warning: prerequisite Date::Calc 0 not found at (eva l 1) line 219. Warning: prerequisite Date::Parse 0 not found at (eva l 1) line 219. Warning: prerequisite File::Tail 0 not found at (eva l 1) line 219. Warning: prerequisite Time::HiRes 1.12 not found at (eva l 1) line 219. 则需要安装这个模块,方法是: #perl -MCPAN -e shell (配置CPAN模块安装环境) cpan>install Date::Calc cpan>install Date::Parse cpan>install File::Tail cpan>install Time::HiRes cpan>exit #perl Makefile.PL #make #make test #make install #make realclean 三、配置 我的配置文件/usr/local/etc/netdevicerc,主要用于监控监控路由器和交换机的端口状态,一旦发生变化会发邮件报警: watchfor = /changed state|STATUS CHANGE\(l\)/ mail = user@yourdomain.com, from = "notify \<notify\@yourdomain.com\>" watchfor指定需要在日志中通过tail配置的关键字,是正则表达式。 注意第二行,我加入了from的指令,即定义swatch发邮件时的发件人,这需要修改swatch的Actions.pm文件,这个这个文件位于:/usr/lib64/perl5/site_perl/5.8.8/Swatch/Actions.pm,在send_email子程序print MAIL_PIPE <<"EOF";前加入以下行: (my $from_line = $args{'FROM'}) =~ s/:/,/g; my @mail_body; my $s_body; my $temp_mess = $args{'MESSAGE'}; $temp_mess =~ s/administratively//; if ($temp_mess =~ /Line protocol/) { @mail_body = (split " ",$temp_mess); $mail_body[13] =~ s/,//; $s_body = "$mail_body[3]'s $mail_body[13] is $mail_body[17]!"; } elsif ($temp_mess =~ /h3c/) { @mail_body = (split " ",$temp_mess); $mail_body[11] =~ s/://; $s_body = "$mail_body[3]'s $mail_body[11] is $mail_body[13]!"; } else { @mail_body = (split " ",$temp_mess); $mail_body[10] =~ s/,//; $s_body = "$mail_body[3]'s $mail_body[10] is $mail_body[14]!"; } 对照原始文件修改以下行 print MAIL_PIPE <<"EOF"; From: $from_line To: $to_line Subject: $s_body $args{'MESSAGE'} EOF close(MAIL_PIPE); }
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