smokeping告警配置

2016年5月22日 发表评论 阅读评论

smokeping 默认用sendmail 发邮件告警,也可以直接调用外部程序进行报警。smokeping的alert设置有点复杂,但是却很好用,设置很灵活,考虑得很周全。

一、配置邮件支持

默认情况下sendmail 是不通过163、qq之类的邮件服务器发送的,不过我们略微修改下配置即可以支持。首先需要安装 Authen::SASL 模块(auth 需要用的),然后修改 smokeping/lib/Smokeping.pm 。

如下:

#头上加
use Authen::SASL;
#定位到sendmail函数,默认新版本sendmail函数的定义的已经是下面这样了,如果不是改成下面这样
sub sendmail ($$$){
    my $from = shift;
    my $to = shift;
    $to = $1 if $to =~ /<(.*?)>/;
    my $body = shift;
    if ($cfg->{General}{mailhost} and
        my $smtp = Net::SMTP->new([split /\s*,\s*/, $cfg->{General}{mailhost}],Timeout=>5) ){
        $smtp->auth(split(/\s*,\s*/, $cfg->{General}{mailusr}),split(/\s*,\s*/, $cfg->{General}{mailpwd}));
        $smtp->mail($from);
        $smtp->to(split(/\s*,\s*/, $to));
        $smtp->data();
        $smtp->datasend($body);
        $smtp->dataend();
        $smtp->quit;
    } elsif ($cfg->{General}{sendmail} or -x "/usr/lib/sendmail"){
        open (M, "|-") || exec (($cfg->{General}{sendmail} || "/usr/lib/sendmail"),"-f",$from,$to);
        print M $body;
        close M;
    } else {
        warn "ERROR: not sending mail to $to, as all methodes failed\n";
    }
}
#找到  '_vars =>' ,把 mailusr mailpwd  加进去。不然不能启动哦!General configuration values valid for the whole SmokePing setup.
DOC
_vars =>
[ qw(owner imgcache imgurl datadir dyndir pagedir piddir sendmail offset
smokemail cgiurl mailhost mailusr mailpwd snpphost contact display_name
syslogfacility syslogpriority concurrentprobes changeprocessnames tmail
changecgiprogramname linkstyle precreateperms ) ],

配置完成后修改配置文件/opt/smokeping/etc/config ,增加邮件服务器的配置:

mailhost = smtp.361way.com
mailusr = monitor@361way.com
mailpwd = xxxxxxxxx

二、Alerts部分配置

1、自定义alerts告警策略

如下定义了几种告警策略,bigloss 、someloss等

*** Alerts ***
to = admin@361way.com
from = monitor@361way.com
+bigloss
type = loss
# in percent
pattern = ==0%,==0%,==0%,==0%,>0%,>0%,>0%
comment = suddenly there is packet loss
+someloss
type = loss
# in percent
pattern = >0%,*12*,>0%,*12*,>0%
comment = loss 3 times  in a row
+startloss
type = loss
# in percent
pattern = ==S,>0%,>0%,>0%
comment = loss at startup
+rttdetect
type = rtt
# in milli seconds
pattern = <10,<10,<10,<10,<10,<100,>100,>100,>100
comment = routing messed up again ?
+hostdown
type = loss
# in percent
pattern = ==0%,==0%,==0%, ==U
comment = no reply
+lossdetect
type = loss
# in percent
pattern = ==0%,==0%,==0%,==0%,>20%,>20%,>20%
comment = suddenly there is packet loss

以上几种告警,这里选取三种说明如下:

  • someloss: 如果在12次检查中出现了3次丢包的情况(不论丢多少个包),就进行alert; 
  • rttbad:
    如果连续出现两次50毫秒以上的延时,就进行alert; 
  • rrtdetect:
    之前5次检查延时都少于10毫秒,前6次检查延时都少于100毫秒,第7次开始连续3次检查延时都大于100毫秒的话,就进行alert。

2、策略应用

在target里面加上相应的策略配置即可,如下:

++ 361way
menu = 361way_host
title =361way.com
host = www.361way.com
alerts = someloss,hostdown

主机一旦出现告警,就会通过邮件发送到我们事先配置的邮箱中,类似下图:

smokeping-alert

上图中的邮件告警内容也可以进行自定义格式输出和修改,这个还是修改Smokeping.pm文件,修改其中如下部分即可:

                    my $default_mail = <<DOC;
Subject: [SmokeAlert] <##ALERT##> <##WHAT##> on <##LINE##>
<##STAMP##>
Alert "<##ALERT##>" <##WHAT##> for <##URL##>
Pattern
-------
<##PAT##>
Data (old --> now)
------------------
<##LOSS##>
<##RTT##>
Comment
-------
<##COMMENT##>
DOC

3、pattern匹配

pattern匹配是编写alert规则中很最要的一部分,官方对这部分有说明,不过我查到了一个香港同胞总结的要好一些,这里摘录下,不做翻译了。

smokeping-pattern

三、特殊调用

1、外部程序调用

调用外部告警程序,如IM、短信等的示例如下:

*** Alerts ***
to = |/usr/local/smokeping/bin/alert.sh
from = joe@somehost

"to" 选项,默认是要填入一个email地址的,但是只要在"="后面加上"|",后面再跟你自定义的脚本的路径,就可以调用自己的脚本进行alert了。脚本会读入5或者6个参数:name-of-alert, target, loss-pattern, rtt-pattern, hostname,[raise]。自己选择使用哪些参数alert即可。

这里从老外站点上找到有一个示例如下:

config 配置

to = |/etc/smokeping/config.d/trace_alert.sh 2> /tmp/trace.log

脚本内容:

########################################################
# Script to email a mtr report on alert from Smokeping #
########################################################
alertname=$1
target=$2
losspattern=$3
rtt=$4
hostname=$5
email="monitoring@email.com"
smokename="BR-NYC-"
if [ “$losspattern" = “loss: 0%" ];
then
subject="Clear-${smokename}-Alert: $target host: ${hostname}"
else
subject="${smokename}Alert: ${target} – ${hostname}"
fi
echo “MTR Report for hostname: ${hostname}" > /tmp/mtr.txt
echo “" >> /tmp/mtr.txt
echo “sudo mtr -n –report ${hostname} "
sudo /usr/sbin/mtr -n –report ${hostname} >> /tmp/mtr.txt
echo “" >> /tmp/mtr.txt
echo “Name of Alert: " $alertname >> /tmp/mtr.txt
echo “Target: " $target >> /tmp/mtr.txt
echo “Loss Pattern: " $losspattern >> /tmp/mtr.txt
echo “RTT Pattern: " $rtt >> /tmp/mtr.txt
echo “Hostname: " $hostname >> /tmp/mtr.txt
echo “" >> /tmp/mtr.txt
echo “Full mtr command is: sudo /usr/sbin/mtr -n –report ${hostname}" >> /tmp/mtr.txt
echo “subject: " $subject
if [ -s /tmp/mtr.txt ] then
mailx -s “${subject}" $email
fi

2、特定主机发送到特定用户

to 表示接受所有报警的邮箱,如果需要在特定的节点报警发送到特定的邮箱
则在该节点上增加alertee = testmonitor@139.com即可。具体可以参看/opt/smokeping/lib/Smokeping.pm源码,如下部分:

foreach my $addr (map {$_ ? (split /\s*,\s*/,$_) : ()} $cfg->{Alerts}{to},$tree->{alertee},$alert->{to}){




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分类: 开源软件 标签: ,
  1. 甘兄
    2016年12月20日17:26 | #1

    您好,博主

    根据你你文档思路,设置通过smokeing发生alerts邮件(发件人为第三方邮件服务器,我实验使用阿里云企业邮箱),设置已经完成,在/var/log/messages文件出现以下内容,说明已经触发报警,同时查看/var/log/maillog,发现任何新邮件记录,个人判断有可能是smokeping没有触发sendmail,麻烦博主基于解答,谢谢。Dec 20 17:17:46 localhost smokeping[2824]: Alert someloss is active for Test.Zhejiang_DNS.Zhejiang_Hangzhou_CTC_master_DNS
    Dec 20 17:18:47 localhost smokeping[2824]: Alert someloss is active for Test.Zhejiang_DNS.Zhejiang_Hangzhou_CTC_master_DNS
    Dec 20 17:19:46 localhost smokeping[2824]: Alert someloss is active for Test.Zhejiang_DNS.Zhejiang_Hangzhou_CTC_master_DNS

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