在nagios伺服器上新增監控的主機及服務：

Nagios配置檔案：

[[email protected] etc]# cd objects/

[[email protected] objects]# ls

commands.cfg（定義監控命令）  localhost.cfg（定義監控什麼）  switch.cfg（定義交換機） timeperiods.cfg（模板檔案）

contacts.cfg（定義聯絡人的）  printer.cfg（定義印表機模板的）    templates.cfg（模板定製檔案）  windows.cfg（監控windows及其模板）

[[email protected]

/usr/local/nagios/etc/objects

新增一臺主機：[[email protected] objects]# vim localhost.cfg

檢查配置檔案是否有誤：

重啟服務並檢視（點選host）：

監控服務（ssh）：[[email protected] objects]# vim localhost.cfg

[[email protected] objects]# /etc/init.d/nagios reload

Running configuration check...

Reloading nagios configuration...

Done

寫外掛：

0正常

1警告

2嚴重警告

一：寫一個監控本機mysql的外掛：

[[email protected] libexec]# vim check_mysql

#!/bin/bash

mysql -e "show databases" &>/dev/null

 if [ $? -eq 0 ]

      then

           echo "mysql runing....."

           exit 0

  else

           echo "mysql stop"

           exit 2

  fi

測試外掛;

[[email protected] libexec]# chmod 755 check_mysql

二：寫一個呼叫外掛的命令

測試外掛：

[[email protected] objects]# /usr/local/nagios/libexec/check_mysql -H localhost

mysql stop

[[email protected] objects]# /etc/init.d/mysqld start

啟動 MySQL：                                               [確定]

[[email protected] objects]# /usr/local/nagios/libexec/check_mysql -H localhost

mysql runing.....

寫localhost.cfg檔案;

[[email protected] objects]# vim localhost.cfg

測試配置檔案是否有錯：

[[email protected] objects]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

[[email protected] objects]# /etc/init.d/nagios reload

Running configuration check...

Reloading nagios configuration...

Done