Nagios（七）——Nagios 邮件，短信告警

benzhou 发表于 2019-1-15 07:04:07

Nagios 除了监控功能很强大之外，它的报警功能也很不错。从运维的角度来讲，报警一般就是邮件和短信报警这两种方式，这次实验实现的是Nagios 的邮件报警功能。

1、安装sendmail 组件
这里要确保sendmail 相关组件的完整安装，
# yum install sendmail* mailx
安装完成后重启sendmail 服务
# service sendmail restart
Shutting down sendmail:
Starting sendmail:
Starting sm-client:

测试sendmail 发信情况
# /bin/mail -s "`date +%Y-%m-%d` Server SMS Test" 159158*****@163.com
hello
admin
.
EOT

2、邮件报警的配置
一般而言，如果在整个系统中只有一个管理员，那么只需要在contact.cfg文件中，添加一下管理员的邮箱即可。但如果监控的内容中服务器有单独的管理员，那就需要定义多个contact（联系人），然后再通过contactgroup（联系组）对各个contact 进行分组。
(1) 修改contact.cfg
# vim /usr/local/nagios/etc/objects/contacts.cfg
define contact{
   contact_name                nagios
   use                         generic-contact
   alias                         Nagios
   email                      159158*****@163.com，159158*****@139.com       // 改为自己的邮箱地址即可
   }

define contactgroup{
   contactgroup_name    admins
   alias                Nagios Administrators
   members             nagios
   }

(2) 设置报警方式
# vim /usr/local/nagios/etc/objects/templates.cfg
define contact{
   name                   generic-contact          ; The name of this contact template
   service_notification_period 24x7                   ; service notifications can be sent anytime
   host_notification_period    24x7                   ; host notifications can be sent anytime
   service_notification_options w,u,c,r,f,s                ; send notifications for all service states, flapping events, and scheduled downtime events
   host_notification_options    d,u,r,f,s                ; send notifications for all host states, flapping events, and scheduled downtime events
   service_notification_commands notify-service-by-email ; send service notifications via email
   host_notification_commands    notify-host-by-email    ; send host notifications via email
   register                      0                   ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL CONTACT, JUST A TEMPLATE!
   }

(3) 修改commands.cfg
# vim /usr/local/nagios/etc/objects/commands.cfg
# 'notify-host-by-email' command definition
define command{
   command_name notify-host-by-email
   command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
   }

# 'notify-service-by-email' command definition
define command{
   command_name notify-service-by-email
   command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
   }

看到这里已经默认配置好，我们不用修改直接调用就行了。

(4) 通过-v参数检查配置无误之后，重启nagios
# service nagios restart
Running configuration check...done.
Stopping nagios: .done.
Starting nagios: done.

(5) 邮箱设置
这里以139邮箱为例，设置收信
点击左上角“设置”可以看到这个版块

http://blog.运维网.com/attachment/201303/231927596.jpg

点击“手机通知”，打开邮箱到达通知，设置接收时间段，设置完保存。

http://blog.运维网.com/attachment/201303/231919676.jpg

返回到这个版块，点击“白名单设置”，将服务器域名设置进白名单

http://blog.运维网.com/attachment/201303/232003232.jpg
http://blog.运维网.com/attachment/201303/232010105.jpg

(6) 测试收信情况
可以随便关闭客户机上的一个服务做测试

http://blog.运维网.com/attachment/201303/232023538.jpg

设置邮件到达提醒后，还可以收到告警短信，效果如下：（需要设置成长短信的形式）

http://blog.运维网.com/attachment/201303/232038811.jpg

PS：139邮箱的短信报警免费是好，但是有时延，这里提供另外一种方式报警——微信告警
可以QQ邮箱将域名设置进白名单，然后微信设置QQ邮箱推送即可（由于设置简单，这里就不演示了）效果如下：

http://blog.运维网.com/attachment/201303/234310499.jpghttp://blog.运维网.com/attachment/201303/234252191.jpg
http://blog.运维网.com/attachment/201303/234326959.jpg

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Nagios（七）——Nagios 邮件，短信告警