Nagios监控配置

24212 · 发表于 2016-2-23 09:08:24

1 使用Nagios插件命令监控本机1.1 问题本案例要求先部署一台Nagios监控主机，并安装插件软件包，通过插件命令实现如下监控目标：

监控本机Web服务
监控本机FTP服务
监控本机SSH服务
监控本机根分区使用量
监控本机登录用户数量
监控本机运行的进程数量

1.2 方案使用1台RHEL6虚拟机，安装部署Nagios及配套插件软件包，在本机使用插件命令监控本机服务及资源状态。
在Nagios插件软件包中，包含了大量的监控脚本，常用的插件脚本及对应功能如表-1所示。
表－1 Nagios常用插件及功能

1.3 步骤实现此案例需要按照如下步骤进行。

步骤一：部署Nagios监控平台

1）安装Apacha、PHP，配置httpd默认首页为index.php
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[iyunv@svr5 ~]# yum -y install httpd php gcc glibc glibc-common gd gd-devel

> libpng libjpeg zlib

[iyunv@svr5 ~]# vim /etc/httpd/conf/httpd.conf

DirectoryIndex index.php index.html index.html.var

[iyunv@svr5 ~]# service httpd start

[iyunv@svr5 ~]# chkconfig httpd on

[iyunv@svr5 ~]# yum -y  install  httpd  php  gcc glibc  glibc-common  gd  gd-devel
> libpng libjpeg zlib
[iyunv@svr5 ~]# vim /etc/httpd/conf/httpd.conf
DirectoryIndex  index.php index.html index.html.var
[iyunv@svr5 ~]# service httpd start
[iyunv@svr5 ~]# chkconfig httpd on

2）安装Nagios Core

安装Nagios前需要做些准备工作，提前创建一个无法登录系统的普通账户，创建Nagios组账户并将apache用户加入到Nagios组中，默认httpd配置文件中定义的User（工作账户）为apache。

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[iyunv@svr5 ~]# groupadd nagcmd                         //创建组

[iyunv@svr5 ~]# useradd -s /sbin/nologin -g nagcmd nagios //创建用户

[iyunv@svr5 ~]# usermod -G nagcmd apache                   //将apache用户加入nagcmd组

[iyunv@srv5 ~]# tar -zxvf nagios-3.2.1.tar.gz -C /usr/src

[iyunv@srv5 ~]# cd /usr/src/nagios-3.2.1/

[iyunv@srv5 ~]# ./configure --with-command-group=nagcmd

[iyunv@srv5 ~]# make all

[iyunv@srv5 ~]# make install

[iyunv@srv5 ~]# make install-init

[iyunv@srv5 ~]# make install-config

[iyunv@srv5 ~]# make install-commandmode

[iyunv@srv5 ~]# make install-webconf

[iyunv@svr5 ~]# groupadd  nagcmd                         //创建组
[iyunv@svr5 ~]# useradd -s /sbin/nologin -g nagcmd nagios //创建用户
[iyunv@svr5 ~]# usermod -G nagcmd  apache                   //将apache用户加入nagcmd组
[iyunv@srv5 ~]# tar -zxvf nagios-3.2.1.tar.gz -C  /usr/src
[iyunv@srv5 ~]# cd /usr/src/nagios-3.2.1/
[iyunv@srv5 ~]# ./configure --with-command-group=nagcmd
[iyunv@srv5 ~]#  make all
[iyunv@srv5 ~]#  make install
[iyunv@srv5 ~]#  make install-init
[iyunv@srv5 ~]#  make install-config
[iyunv@srv5 ~]#  make install-commandmode
[iyunv@srv5 ~]#  make install-webconf

3）安装Nagios插件

前面安装的Nagios Core主要提供的是监控系统的核心功能，包含核心检测引擎和一个基本的Web页面，真正执行监控的程序和指令还需要通过安装Nagios插件来获得。

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[iyunv@svr5 ~]# tar -zxvf nagios-plugins-1.4.14.tar.gz

[iyunv@svr5 ~]# cd nagios-plugins-1.4.14

[iyunv@svr5 nagios-plugins-1.4.14]#./configure --with-nagios-user=nagios \

> --with-nagios-group=nagcmd

[iyunv@svr5 nagios-plugins-1.4.14]# make && make install

[iyunv@svr5 libexec]# ls /usr/local/nagios/libexec/          //查看监控脚本

check_apt check_ftp check_mrtgtraf check_ping check_time

check_breeze check_http check_mysql check_pop check_udp

check_by_ssh check_icmp check_mysql_query check_procs check_ups

check_clamd check_ide_smart check_nagios check_real check_uptime

check_cluster check_ifoperstatus check_nntp check_rpc check_users

check_dhcp check_ifstatus check_nntps check_sensors check_wave

check_dig check_imap check_nt check_simap negate

check_disk check_ircd check_ntp check_smtp urlize

check_disk_smb check_jabber check_ntp_peer check_spop utils.pm

check_dns check_load check_ntp_time check_ssh utils.sh

check_dummy check_log check_nwstat check_ssmtp

check_file_age check_mailq check_oracle check_swap

check_flexlm check_mrtg check_overcr check_tcp

[iyunv@svr5 ~]# tar -zxvf nagios-plugins-1.4.14.tar.gz
[iyunv@svr5 ~]# cd nagios-plugins-1.4.14
[iyunv@svr5 nagios-plugins-1.4.14]#./configure --with-nagios-user=nagios  \
> --with-nagios-group=nagcmd
[iyunv@svr5 nagios-plugins-1.4.14]# make && make install
[iyunv@svr5 libexec]# ls /usr/local/nagios/libexec/          //查看监控脚本
check_apt    check_ftp          check_mrtgtraf    check_ping    check_time
check_breeze check_http       check_mysql       check_pop    check_udp
check_by_ssh check_icmp       check_mysql_query  check_procs check_ups
check_clamd    check_ide_smart    check_nagios    check_real    check_uptime
check_cluster check_ifoperstatus  check_nntp       check_rpc    check_users
check_dhcp    check_ifstatus    check_nntps       check_sensors  check_wave
check_dig    check_imap       check_nt          check_simap negate
check_disk    check_ircd       check_ntp       check_smtp    urlize
check_disk_smb  check_jabber       check_ntp_peer    check_spop    utils.pm
check_dns    check_load       check_ntp_time    check_ssh    utils.sh
check_dummy    check_log          check_nwstat    check_ssmtp
check_file_age  check_mailq       check_oracle    check_swap
check_flexlm check_mrtg       check_overcr    check_tcp

步骤二：使用监控脚本监控资源

1）监控Web服务器资源

check_http脚本的作用主要作用是检查Web服务，-I指定需要监控的服务器域名或IP地址，-w设置服务器响应时间的警报值（服务器响应时间超过该值则警告，默认单位为秒），-c设置服务器响应时间的严重故障警报值（服务器响应时间超过该值则提示严重错误，默认单位为秒），更多参数可以使用check_httpd -h来获得。

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[iyunv@svr5 ~]# /usr/local/nagios/libexec

[iyunv@svr5 ~]# ./check_http -w 5 -c 10 –I 127.0.0.1

[iyunv@svr5 ~]# /usr/local/nagios/libexec
[iyunv@svr5 ~]# ./check_http -w 5 -c 10 –I 127.0.0.1

2）监控FTP服务

check_ftp脚本的作用主要作用是检查FTP服务，-H指定需要监控的服务器域名或IP地址，-w设置服务器响应时间的阈值（服务器响应时间超过该值则警告，默认单位为秒），-c设置服务器响应时间的严重错误的阈值（服务器响应时间超过该值则提示严重错误，默认单位为秒），更多参数可以使用check_ftp -h来获得。

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[iyunv@svr5 ~]# /usr/local/nagios/libexec

[iyunv@svr5 ~]# ./check_ftp -w 5 -c 10 -H 127.0.0.1

[iyunv@svr5 ~]# /usr/local/nagios/libexec
[iyunv@svr5 ~]# ./check_ftp -w 5 -c 10 -H 127.0.0.1

3）监控SSH服务

check_ssh脚本的作用主要作用是检查SSH服务，-H指定监控的主机名称或IP地址，-p指定SSH服务的端口号信息。

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[iyunv@svr5 ~]# /usr/local/nagios/libexec

[iyunv@svr5 ~]# ./check_ssh -H 127.0.0.1 –p 22

[iyunv@svr5 ~]# /usr/local/nagios/libexec
[iyunv@svr5 ~]# ./check_ssh -H 127.0.0.1 –p 22

4）监控根分区使用情况

check_disk脚本的作用主要作用是检查磁盘使用情况，-u设置磁盘存储空间的单位（可以使用的单位有：kB、MB、GB、TB，默认单位为MB），-w设定存储剩余空间的警告提示的报警值，-c设定磁盘剩余空间严重错误的报警值，-p指定监控的分区挂载点。-w和-c除了可以监控磁盘的剩余空间外，还可以监控剩余磁盘的百分比如，-w 50%，-c 40%。

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[iyunv@svr5 ~]# /usr/local/nagios/libexec

[iyunv@svr5 ~]#./check_disk -u MB -w 9000 -c 5000 -p /

[iyunv@svr5 ~]# /usr/local/nagios/libexec
[iyunv@svr5 ~]#./check_disk -u MB -w 9000 -c 5000 -p /

5）监控登录用户数量

check_users脚本的作用主要作用是检查当前系统登录账户的情况，-w设置警告的阈值，-c设置严重错误的阈值。

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[iyunv@svr5 ~]# /usr/local/nagios/libexec

[iyunv@svr5 ~]# ./check_users -w 5 -c 8

[iyunv@svr5 ~]# /usr/local/nagios/libexec
[iyunv@svr5 ~]# ./check_users -w 5 -c 8

6）监控本机运行的进程数量

check_procs脚本的作用是监控本地进程，-w设置进程数量警告的阈值，-c设置严重错误的阈值。该脚本时可以使用--metric设置监控类型，默认监控进程数量，--metric=CPU则监控进程占用的CPU百分比，任何一个进程占用CPU百分比超过-w设置的值将出现警告信息。

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[iyunv@svr5 ~]# /usr/local/nagios/libexec

[iyunv@svr5 ~]# ./check_procs -w 100 -c 120 //监控进程数量

[iyunv@svr5 ~]# check_procs -w 10 -c 20 --metric=CPU //监控CPU占用

[iyunv@svr5 ~]# /usr/local/nagios/libexec
[iyunv@svr5 ~]# ./check_procs -w 100 -c 120       //监控进程数量
[iyunv@svr5 ~]# check_procs -w 10 -c 20 --metric=CPU  //监控CPU占用

2 搭建Nagios监控服务器
2.1 问题

沿用练习一，通过调整Nagios服务端配置，实现以下目标：

Web服务

ssh服务

登录的用户数

2.2 方案

默认安装完Nagios Core和nagios-plugins之后，我们就可以直接使用脚本命令来监控本机资源，如果还希望直接使用Nagios监控平台实现动态监控本机资源的话，还需要修改Nagios的配置文件，重点配置文件如下：

监控命令配置文件（commands.cfg）

监控对象配置文件（localhost.cfg）

Nagios主配置文件（nagios.cfg）

配置页面登录配置文件（nagios.conf）

2.3 步骤

实现此案例需要按照如下步骤进行。

步骤一：修改配置文件

1）修改监控命令配置文件

在该文件中使用define command指令定义监控命令，command_name定义监控命令的名称，command_line定义监控的功能。定义完成后就可以到特定的监控对象配置文件中调用该监控命令，实现监控的目的。

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[iyunv@svr5 ~]# vim /usr/local/nagios/etc/objects/commands.cfg

define command {

command_name check_local_users

command_line $USER1$/check_users -w $ARG1$ -c $ARG2$

}

define command {

command_name check_http

command_line $USER1$/check_http -I $HOSTADDRESS$ $ARG1$

}

define command {

command_name check_ssh

command_line $USER1$/check_ssh -H $HOSTADDRESS$

}

[iyunv@svr5 ~]# vim /usr/local/nagios/etc/objects/commands.cfg
define command {
      command_name check_local_users
      command_line    $USER1$/check_users -w $ARG1$ -c $ARG2$
}
define command  {
      command_name check_http
      command_line $USER1$/check_http -I $HOSTADDRESS$ $ARG1$
}
define command  {
      command_name check_ssh
      command_line $USER1$/check_ssh -H $HOSTADDRESS$
}

2）修改监控对象的配置文件（多个监控对象可以创建多个文件）

该文件中使用define host定义监控对象，包括被监控主机的主机名、IP地址、别名等。使用define service定义需要监控的服务，host name定义哪个主机实施监控，check_command定义调用哪个监控命令实现监控。

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[iyunv@svr5 ~]# vim /usr/local/nagios/etc/objects/localhost.cfg

define host {

use                   linux-server

host_name       localhost

alias                   localhost

address             127.0.0.1

}

define service{

use                      local-service

host_name                   localhost

service_description       Current Users          //监控登录用户数量

check_command             check_local_users!20!50 //20为警告阈值，50为严重阈值

}

define service{

use                      local-service

host_name                   localhost

service_description       http server          //监控http服务

check_command             check_http

}

define service{

use                      local-service

host_name                   localhost

service_description       ssh server          //监控ssh服务

check_command             check_ssh

}

[iyunv@svr5 ~]# vim /usr/local/nagios/etc/objects/localhost.cfg
define host  {
      use                   linux-server
      host_name                localhost
      alias                   localhost
      address             127.0.0.1
      }
define service{
      use                      local-service
      host_name                   localhost
      service_description       Current Users          //监控登录用户数量
      check_command             check_local_users!20!50 //20为警告阈值，50为严重阈值
      }
define service{
      use                      local-service
      host_name                   localhost
      service_description       http server          //监控http服务
      check_command             check_http
      }
define service{
      use                      local-service
      host_name                   localhost
      service_description       ssh server          //监控ssh服务
      check_command             check_ssh
      }

3）修改Nagios主配置文件nagios.cfg

通过该主配置文件，加载上面定义的配置文件内容。

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[iyunv@svr5 ~]# vim /usr/local/nagios/etc/nagios.cfg

.. ..

cfg_file=/usr/local/nagios/etc/objects/commands.cfg

cfg_file=/usr/local/nagios/etc/objects/contacts.cfg

cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg

cfg_file=/usr/local/nagios/etc/objects/templates.cfg

cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

.. ..

[iyunv@svr5 ~]# vim /usr/local/nagios/etc/nagios.cfg
.. ..
cfg_file=/usr/local/nagios/etc/objects/commands.cfg
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg
cfg_file=/usr/local/nagios/etc/objects/templates.cfg
cfg_file=/usr/local/nagios/etc/objects/localhost.cfg
.. ..

4）修改web页面认证配置文件

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[iyunv@svr5 ~]# vim /etc/httpd/conf.d/nagios.conf

<Directory "/usr/local/nagios/sbin">

……

……

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios/etc/htpasswd.users

Require valid-user

</Directory>

[iyunv@svr5 ~]# ]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

New password:

Re-type new password:

Adding password for user nagadmin

[iyunv@svr5 ~]# vim /etc/httpd/conf.d/nagios.conf
<Directory "/usr/local/nagios/sbin">
……
……
AuthName "Nagios Access"
AuthType Basic
AuthUserFile /usr/local/nagios/etc/htpasswd.users
Require valid-user
</Directory>
[iyunv@svr5 ~]# ]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
New password:
Re-type new password:
Adding password for user nagadmin

步骤二：启动服务，查看监控页面

1）启动Nagios服务

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[iyunv@svr5 ~]# /etc/init.d/nagios start

Starting nagios:This account is currently not available.

done.

[iyunv@svr5 ~]# /etc/init.d/nagios start
Starting nagios:This account is currently not available.
done.

2）启动httpd服务：

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[iyunv@svr5 ~]# service httpd restart

启动 httpd： [确定]

[iyunv@svr5 ~]# service  httpd restart
启动 httpd：                                              [确定]

3）登录监控Web页面，使用浏览器访问http://监控服务器IP地址/nagios

3 使用Nagios监控远端主机
3.1 问题

沿用练习二，通过调整Naiogs配置，实现以下目标：

监控服务器IP地址为192168.170.92

被监控主机ip地址是192.168.170.49

监控被监控主机上运行的vsftpd、httpd服务

监控被监控主机上运行的进程数、CPU负载、登录的用户数、根分区的使用量

3.2 方案

使用Nagios监控其他主机的资源需要使用nrpe扩展，监控拓扑结构如图-1所示。

图-1
3.3 步骤实现此案例需要按照如下步骤进行。

步骤一：配置被监控端主机

1）安装nagios-plugins
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[iyunv@localhost ~]# useradd nagios

[iyunv@localhost ~]# groupadd nagcmd

[iyunv@localhost ~]# usermod -G nagcmd nagios

[iyunv@localhost ~]# tar -zxvf nagios-plugins-1.4.14.tar.gz

[iyunv@localhost ~]# cd nagios-plugins-1.4.14

[iyunv@localhost nagios-plugins]# ./configure

[iyunv@localhost nagios-plugins]# make && make install

[iyunv@localhost ~]# useradd nagios
[iyunv@localhost ~]# groupadd nagcmd
[iyunv@localhost ~]# usermod -G nagcmd nagios
[iyunv@localhost ~]# tar -zxvf nagios-plugins-1.4.14.tar.gz
[iyunv@localhost ~]# cd nagios-plugins-1.4.14
[iyunv@localhost nagios-plugins]# ./configure
[iyunv@localhost nagios-plugins]# make  && make  install

2）安装nrpe扩展

Nagios监控远程主机资源是需要调用nrpe扩展，因此监控主机和被监控主机均需要安装nrpe。

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[iyunv@localhost ~]# tar -zxvf nrpe-2.12.tar.gz

[iyunv@localhost ~]# cd nrpe-2.12

[iyunv@localhost nrpe-2.12]# ./configure

[iyunv@localhost nrpe-2.12]# make && make install

[iyunv@localhost nrpe-2.12]#make install-plugin

[iyunv@localhost nrpe-2.12]#make install-daemon

[iyunv@localhost nrpe-2.12]#make install-daemon-config

[iyunv@localhost nrpe-2.12]#make install-xinetd

[iyunv@localhost ~]# tar -zxvf nrpe-2.12.tar.gz
[iyunv@localhost ~]# cd nrpe-2.12
[iyunv@localhost nrpe-2.12]# ./configure
[iyunv@localhost nrpe-2.12]# make && make install
[iyunv@localhost nrpe-2.12]#make install-plugin
[iyunv@localhost nrpe-2.12]#make install-daemon
[iyunv@localhost nrpe-2.12]#make install-daemon-config
[iyunv@localhost nrpe-2.12]#make install-xinetd

3）修改nrpe文件文件

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[iyunv@localhost ~]# vim /usr/local/nagios/etc/nrpe.cfg

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10

//定义监控登录用户数量的警告及严重错误的阈值分别为5和10

command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20

//定义监控本机CPU负载的警告及严重错误阈值，负载按最近1分钟，5分钟，15分钟分别计算

command[check_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1

//定义监控本机磁盘/dev/sda1的使用情况

command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z

//定义监控本机僵死进程的警告及严重错误阈值分别为5和10

command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200

//定义监控进程数量的警告及严重错误阈值分别为150和200

[iyunv@localhost ~]# vim /usr/local/nagios/etc/nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
//定义监控登录用户数量的警告及严重错误的阈值分别为5和10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
//定义监控本机CPU负载的警告及严重错误阈值，负载按最近1分钟，5分钟，15分钟分别计算
command[check_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1
//定义监控本机磁盘/dev/sda1的使用情况
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
//定义监控本机僵死进程的警告及严重错误阈值分别为5和10
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
//定义监控进程数量的警告及严重错误阈值分别为150和200

4）修改配置文件，启动nrpe服务

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[iyunv@localhost ~]# vim /etc/xinetd.d/nrpe             //xinet配置文件

service nrpe {

flags = REUSE

socket_type = stream

port = 5666                         //定义监听的端口号

wait = no

user = nagios

group = nagios

server = /usr/local/nagios/bin/nrpe

server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd

log_on_failure += USERID

disable = no

only_from = 127.0.0.1 192.168.170.92       //定义允许哪些主机监控本机

}

[iyunv@localhost ~]# vim /etc/services                //指定nrpe对应端口

nrpe 5666/tcp # TCP port service nrpe

[iyunv@localhost ~]# /etc/init.d/xinetd restart

停止 xinetd： [确定]

启动 xinetd： [确定]

[iyunv@localhost ~]# netstat -utnalp | grep :5666

tcp 0 0 0.0.0.0:5666       0.0.0.0:*       LISTEN 29488/xinetd

[iyunv@localhost ~]# vim /etc/xinetd.d/nrpe             //xinet配置文件
service  nrpe  {
      flags          = REUSE
      socket_type    = stream
      port          = 5666                         //定义监听的端口号
      wait          = no
      user          = nagios
      group          = nagios
      server       = /usr/local/nagios/bin/nrpe
      server_args    = -c /usr/local/nagios/etc/nrpe.cfg --inetd
      log_on_failure  += USERID
      disable       = no
      only_from    = 127.0.0.1 192.168.170.92       //定义允许哪些主机监控本机
}
[iyunv@localhost ~]# vim  /etc/services                   //指定nrpe对应端口
nrpe          5666/tcp                      # TCP port service nrpe
[iyunv@localhost ~]# /etc/init.d/xinetd restart
停止 xinetd：                                           [确定]
启动 xinetd：                                           [确定]
[iyunv@localhost ~]# netstat -utnalp  |  grep  :5666
tcp       0    0 0.0.0.0:5666       0.0.0.0:*       LISTEN    29488/xinetd

步骤二：配置Nagios监控服务器

1）安装nrpe软件包

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[iyunv@svr5 ~]# tar -zxvf nrpe-2.12.tar.gz

[iyunv@svr5 ~]# cd nrpe-2.12

[iyunv@svr5 nrpe-2.12]# ./configure

[iyunv@svr5 nrpe-2.12]# make

[iyunv@svr5 nrpe-2.12]# make install

[iyunv@svr5 nrpe-2.12]# make install-plugin

[iyunv@svr5 ~]# tar -zxvf  nrpe-2.12.tar.gz
[iyunv@svr5 ~]# cd nrpe-2.12
[iyunv@svr5 nrpe-2.12]# ./configure
[iyunv@svr5 nrpe-2.12]# make
[iyunv@svr5 nrpe-2.12]# make install
[iyunv@svr5 nrpe-2.12]# make install-plugin

2）修改监控命令配置文件，调用nrpe实现监控功能：

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[iyunv@svr5 ~]# vim commands.cfg

define command {

command_name check_nrpe

command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

}

[iyunv@svr5 ~]# vim  commands.cfg
define command  {
      command_name check_nrpe
      command_line  $USER1$/check_nrpe -H $HOSTADDRESS$  -c  $ARG1$
}

3）创建监控对象配置文件

可以使用localhost.cfg作为模板复制，生成新的监控对象配置文件。

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[iyunv@svr5 ~]# cd /usr/local/nagios/etc/objects/

[iyunv@svr5 objects]# cp localhost.cfg 49-server.cfg

[iyunv@svr5 objects]# vim 49-server.cfg

define host {

use linux-server

host_name             49server

alias mail.tarena.com

address             192.168.170.49       //定义监控对象为被监控主机IP

}

define service {

use                         local-service

host_name                      49server

service_description          PING             //监控被监控主机ping状态

check_command                   check_ping!100.0,20%!500.0,60%

}

define service {

use                         local-service

host_name 49server

service_description          SSH             //监控被监控主机的ssh状态

check_command                   check_ssh

notifications_enabled          0

}

define service {

use                         local-service

host_name                      49server

service_description          Current Users //调用nrpe监控用户数量

check_command          check_nrpe!check_users

}

define service {

use                         local-service

host_name                      49server

service_description          CPU load          //调用nrpe监控CPU负载

check_command          check_nrpe! check_load

}

define service {

use                         local-service

host_name                      49server

service_description          root partition //调用nrpe监控磁盘

check_command          check_nrpe!check_sda1

}

define service {

use                         local-service

host_name                      49server

service_description          process number //调用nrpe监控进程数量

check_command          check_nrpe! check_total_procs

}

define service {

use                         local-service

host_name                      49server

service_description          vsftpd server //监控被监控主机FTP服务

check_command          check_ftp

}

define service {

use                         local-service

host_name                      49server

service_description          httpd server       //监控被监控主机HTTP服务

check_command          check_http

}

[iyunv@svr5 ~]# cd  /usr/local/nagios/etc/objects/
[iyunv@svr5 objects]# cp localhost.cfg 49-server.cfg
[iyunv@svr5 objects]# vim 49-server.cfg
define host {
      use                   linux-server
      host_name             49server
      alias                   mail.tarena.com
      address             192.168.170.49       //定义监控对象为被监控主机IP
      }
define service {
      use                         local-service
      host_name                      49server
      service_description          PING             //监控被监控主机ping状态
      check_command                   check_ping!100.0,20%!500.0,60%
      }
define service  {
      use                         local-service
      host_name                      49server
      service_description          SSH             //监控被监控主机的ssh状态
      check_command                   check_ssh
      notifications_enabled          0
      }
define service  {
      use                         local-service
      host_name                      49server
      service_description          Current Users //调用nrpe监控用户数量
      check_command                   check_nrpe!check_users
      }
define service  {
      use                         local-service
      host_name                      49server
      service_description          CPU load          //调用nrpe监控CPU负载
      check_command                   check_nrpe! check_load
      }
define service  {
      use                         local-service
      host_name                      49server
      service_description          root partition //调用nrpe监控磁盘
      check_command                   check_nrpe!check_sda1
      }

define service  {
      use                         local-service
      host_name                      49server
      service_description          process number //调用nrpe监控进程数量
      check_command                   check_nrpe! check_total_procs
      }
define service  {
      use                         local-service
      host_name                      49server
      service_description          vsftpd server //监控被监控主机FTP服务
      check_command                   check_ftp
      }
define service  {
      use                         local-service
      host_name                      49server
      service_description          httpd server       //监控被监控主机HTTP服务
      check_command                   check_http
      }

4）修改Nagios主配置文件nagios.cfg

通过该主配置文件，加载上面定义的配置文件内容。

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[iyunv@svr5 ~]# vim /usr/local/nagios/etc/nagios.cfg

.. ..

cfg_file=/usr/local/nagios/etc/objects/commands.cfg

cfg_file=/usr/local/nagios/etc/objects/contacts.cfg

cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg

cfg_file=/usr/local/nagios/etc/objects/templates.cfg

cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

cfg_file=/usr/local/nagios/etc/objects/49-server.cfg

.. ..

[iyunv@svr5 ~]# vim /usr/local/nagios/etc/nagios.cfg
.. ..
cfg_file=/usr/local/nagios/etc/objects/commands.cfg
cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg
cfg_file=/usr/local/nagios/etc/objects/templates.cfg
cfg_file=/usr/local/nagios/etc/objects/localhost.cfg
cfg_file=/usr/local/nagios/etc/objects/49-server.cfg
.. ..

5）重启nagios服务，查看监控页面

重启nagios服务后，进入登录监控页面刷新查看新的监控状态。

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[iyunv@svr5 ~]# /etc/init.d/nagios restart

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