本文是小弟整合幾位大神的文章，見笑@@

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Linux利用sendmail和fetion發(fā)送報警通知

 nagios監(jiān)控windows主機(jī) && linux主機(jī)

 CentOS 5/6.X 使用 EPEL YUM源：

實驗環(huán)境：

兩臺64位的centos-6.6

一臺window-server-2003

安裝網(wǎng)絡(luò)yum源：

centos5.x--32位
[root@centos-server ~]# wget http://mirrors.yun-idc.com/epel/5/i386/epel-release-5-4.noarch.rpm
centos5.x--64位
[root@centos-server ~]# wget http://mirrors.hust.edu.cn/epel//5/x86_64/epel-release-5-4.noarch.rpm
centos6.x--32位
[root@centos-server ~]# wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
centos6.x--64位
[root@centos-server ~]# wget http://mirrors.hust.edu.cn/epel//6/x86_64/epel-release-6-8.noarch.rpm
[root@centos-server ~]# rpm -ivh epel-release-6-8.noarch.rpm

搭建nagios監(jiān)控服務(wù)器：

yum install httpd php* openssl openssl-devel nagios nagios-plugins*
setenforce 0
iptables -I INPUT -p tcp --dport 80 -j ACCEPT
增加httpd的訪問驗證
[root@centos-server ~]# htpasswd -c /etc/nagios/htpasswd nagiosadmin
New password: 
Re-type new password: 
Adding password for user nagiosadmin

注意nagios的默認(rèn)用戶就是nagiosadmin，如果你使用的不是此用戶，需要修改以下項目
[root@centos-server objects]# cat /etc/nagios/cgi.cfg |grep nagiosadmin
authorized_for_system_information=nagiosadmin
authorized_for_configuration_information=nagiosadmin
authorized_for_system_commands=nagiosadmin
authorized_for_all_services=nagiosadmin
authorized_for_all_hosts=nagiosadmin
authorized_for_all_service_commands=nagiosadmin
authorized_for_all_host_commands=nagiosadmin
快速修改命令

[root@centos-server ~]# sed -i 's/nagiosadmin/dragon/g' /etc/nagios/cgi.cfg 
通過httpd訪問nagios的web文件

[root@centos-server objects]# cat >> /etc/httpd/conf/httpd.conf <
AllowOverride AuthConfig
Options ExecCGI
Order allow,deny
Allow from all
AuthUserFile /etc/nagios/htpasswd 

Alias /nagios /usr/share/nagios/html/

Options None
AllowOverride AuthConfig
Order allow,deny
Allow from all
AuthUserFile /etc/nagios/htpasswd

END

定義監(jiān)控LINUX文件：

[root@centos-server objects]# mkdir /etc/nagios/objects/server
[root@centos-server objects]# vim /etc/nagios/nagios.cfg
cfg_dir=/usr/local/nagios/etc/servers
[root@centos-server objects]# vim /etc/nagios/objects/server/192.168.150.143.cfg 
define host{
        use                     linux-server
        host_name               192.168.150.143
        alias                   linux
        address                 192.168.150.143
        }
 
 
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             Check Swap
        check_command                   check_nrpe!check_swap
        }
 
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             total
        check_command                   check_nrpe!check_total_procs
        }
 
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             check_load
        check_command                   check_nrpe!check_load
        }
 
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             check_tcp_3306
        check_command                   check_tcp!3306
        }
 
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             check_users
        check_command                   check_nrpe!check_users
        }
 
 
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             check_MySQL
        check_command                   check_nrpe!check_mysql
        }
define service{
        use                             generic-service
        host_name                        192.168.150.143
        service_description             check_http  192.168.150.143/index.html
        check_command                   check_http!'-u /index.html' 
}
define service{
        use                             generic-service
        host_name                       192.168.150.143
        service_description             check_disk
        check_command                   check_nrpe!check_sda1
        }
在commonds.cfg中添加check_nrpe的命令
[root@centos-server objects]# vim /etc/nagios/objects/commands.cfg 
define command{
      command_name  check_nrpe
      command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

配置linux客戶端：

[root@centos-server ~]# yum install nagios-plugins* openssl-devel openssl mysql-server
[root@centos-server ~]# cat /etc/nrpe.d/nrpe 
only_from=127.0.0.1 192.168.150.139
[root@centos-server objects]# vim /etc/nagios/nrpe.cfg 
添加nagios監(jiān)控端的ip
allowed_hosts=127.0.0.1,192.168.150.139
添加以下內(nèi)容
command[check_users]=/usr/lib64/nagios/plugins/check_users -w 5 -c 10
command[check_load]=/usr/lib64/nagios/plugins/check_load -w 15,10,5 -c 30,25,20
command[check_sda1]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /dev/sda1
command[check_zombie_procs]=/usr/lib64/nagios/plugins/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/lib64/nagios/plugins/check_procs -w 150 -c 200 
command[check_mysql]=/usr/lib64/nagios/plugins/check_mysql -H 127.0.0.1 -ubbq -pqwe123  #此用戶需要在mysql中添加
command[check_swap]=/usr/lib64/nagios/plugins/check_swap -w 20% -c 10%

通過yum安裝的nagios監(jiān)控插件還有很多，有需要用到的可以研究下：

兩端重啟服務(wù)：

service nagios restart
service httpd restart
service nrpe restart
service xinetd restart
[root@centos-server ~]# netstat -anl|grep 5666
tcp        0      0 0.0.0.0:5666                0.0.0.0:*                   LISTEN      
tcp        0      0 :::5666                     :::*                        LISTEN  
在nagios監(jiān)控端測試被監(jiān)控端nrpe聯(lián)通：
[root@centos-server ~]# /usr/lib64/nagios/plugins/check_nrpe -H 192.168.150.143
NRPE v2.15

監(jiān)控window-server：

[root@centos-server objects]# vim /etc/nagios/objects/server/192.168.150.146.cfg
define host{
usewindows-server 
        host_name               192.168.150.146
        alias                   my computer
        address                 192.168.150.146
        }
 
 
define service{
        use                             generic-service
        host_name                       192.168.150.146
        service_description             NSClient++ Version
        check_command                   check_win!CLIENTVERSION
         }
 
define service{
        use                             generic-service
        host_name                       192.168.150.146
        service_description             Uptime
        check_command                   check_win!UPTIME
        }
 
define service{
        use                             generic-service
        host_name                       192.168.150.146
        service_description             CPU Load
        check_command                   check_win!CPULOAD!-l 5,80,90
}
 
define service{
       use                     generic-service
       host_name               192.168.150.146
       service_description     Memory Usage
       check_command           check_win!MEMUSE!-w 80 -c 90
       }
 
define service{
       use                     generic-service
       host_name               192.168.150.146
       service_description     C:\ Drive Space
       check_command           check_win!USEDDISKSPACE!-l c -w 80 -c 90
       }
 
define service{
       use                     generic-service
       host_name               192.168.150.146
       service_description     D:\ Drive Space
       check_command           check_win!USEDDISKSPACE!-l d -w 80 -c 90
       }
 
define service{
       use                     generic-service
       host_name               192.168.150.146
       service_description     E:\ Drive Space
       check_command           check_win!USEDDISKSPACE!-l e -w 80 -c 90
       }
define service{
       use                     generic-service
       host_name               192.168.150.146
       service_description     Explorer
       check_command           check_win!PROCSTATE!-d SHOWALL -l Explorer.exe
       }
[root@centos-server objects]# vim /etc/nagios/objects/commands.cfg 
define command{
        command_name    check_win
        command_line    $USER1$/check_nt -H "$HOSTADDRESS$" -p 12489 -s dianyi123 -v $ARG1$ $ARG2$
}

測試配置文件：

[root@centos-server objects]# /usr/sbin/nagios -v /etc/nagios/nagios.cfg 
Error: Could not find any hostgroup matching 'windows-servers' (config file '/etc/nagios/objects/server/192.168.150.146.cfg', starting on line 1)
#這里我遇到這個錯誤了，把/etc/nagios/objects/templates.cfg 里window-server模版主機(jī)中以下這項注釋就可以了
 #hostgroups             windows-servers ; 
重啟以下服務(wù)
[root@centos-server objects]# service nagios restart

配置window安裝NSClient++：

1.

2.

3.

看到監(jiān)控結(jié)果：

郵件報警設(shè)置：

引用鄭彥生的原文
1、停止系統(tǒng)自帶的sendmail服務(wù)
# /etc/init.d/postfix stop
 
2、安裝sendmail和mailx
# yum -y install sendmail mailx
 
3、修改sendmail配置文件
# cp /etc/mail.rc /etc/mail.rc.bak
# cat >> /etc/mail.rc << EOF
set from=13260071987@139.com smtp=smtp.139.com 
set smtp-auth-user=13260071987@139.com smtp-auth-password=yi15093547036 smtp-auth=login
EOF
 
4、重新啟動sendmail服務(wù)
# service sendmail restart
5.修改聯(lián)系人
[root@centos-server objects]# vim /etc/nagios/objects/contacts.cfg 
define contact{
        contact_name                    nagiosadmin             
        use                             generic-contact         
        alias                           Nagios Admin          
        email                           18507656225@139.com     
        }

查看郵件：