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Nagios 對主機的監(jiān)控分為2種，像服務，端口，ping之類的監(jiān)控屬于外部信息監(jiān)控；像內存，磁盤，swap這些信息的監(jiān)控屬于內部信息監(jiān)控。外部信息監(jiān)控可以通過安裝Nagios 插件補丁來實現例如check_ping ；內部信息監(jiān)控則需要通過NRPE 插件來實現，其原理為：客戶機NRPE插件收集相關信息，服務端通過check_nrpe 來采集相關信息，并做相關處理。
創(chuàng)新互聯長期為上千余家客戶提供的網站建設服務，團隊從業(yè)經驗10年，關注不同地域、不同群體，并針對不同對象提供差異化的產品和服務；打造開放共贏平臺，與合作伙伴共同營造健康的互聯網生態(tài)環(huán)境。為襄汾企業(yè)提供專業(yè)的網站制作、成都網站制作，襄汾網站改版等技術服務。擁有10年豐富建站經驗和眾多成功案例,為您定制開發(fā)。一、監(jiān)控外部信息
監(jiān)控外部信息，只需要參照Nagios(二) 將Nagios 服務搭建起來，并且配置好欲監(jiān)控的主機和服務即可。
1. 配置hosts.cfg
[root@server ~]# vim /usr/local/nagios/etc/hosts.cfg
define host{
use linux-server
host_name node-1
alias lamp
address 192.168.30.110
}
2. 配置services.cfg
[root@server etc]# vim services.cfg
define service{
use generic-service
host_name node-1
service_description ping
check_command check_ping!100.0,20%!500.0,60%
max_check_attempts 5
normal_check_interval 1
}
define service{
use generic-service
host_name node-1
service_description tcp
check_command check_tcp!22
max_check_attempts 5
normal_check_interval 1
}
define service{
use generic-service
host_name node-1
service_description http
check_command check_http
max_check_attempts 5
normal_check_interval 1
}
3.將services.cfg和hosts.cfg 引用進nagios
[root@server ~]# vim /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/hosts.cfg
cfg_file=/usr/local/nagios/etc/services.cfg
4.用nagios自帶的檢查命令檢查其配置是否正確
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
注意：由于這條命令較長而且使用的頻率也較高，所以可以通過以下的方法快捷的運用
[root@server ~]# vim .bashrc
alias check='/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg'
[root@server ~]# source .bashrc
這樣使用check命令即可直接調用-v 的命令，但只是當前登錄有效。
命令運行結果如下：
[root@server ~]# check
Nagios Core 3.2.0
Copyright (c) 2009 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 08-12-2009
License: GPL
Website: http://www.nagios.org
Reading configuration data...
Read main config file okay...
Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...
Processing object config file '/usr/local/nagios/etc/hosts.cfg'...
Processing object config file '/usr/local/nagios/etc/services.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg'...
Read object config files okay...
Running pre-flight check on configuration data...
Checking services...
Checked 11 services.
Checking hosts...
Checked 2 hosts.
Checking host groups...
Checked 1 host groups.
Checking service groups...
Checked 0 service groups.
Checking contacts...
Checked 1 contacts.
Checking contact groups...
Checked 1 contact groups.
Checking service escalations...
Checked 0 service escalations.
Checking service dependencies...
Checked 0 service dependencies.
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Checked 0 host dependencies.
Checking commands...
Checked 24 commands.
Checking time periods...
Checked 5 time periods.
Checking for circular paths between hosts...
Checking for circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...
Total Warnings: 0
Total Errors: 0 # 這里顯示沒有錯誤和警告說明啟動沒問題了
Things look okay - No serious problems were detected during the pre-flight check
5. 重啟nagios
[root@server ~]# service nagios restart
Running configuration check...done.
Stopping nagios: done.
Starting nagios: done.
6. 測試
監(jiān)控服務：
監(jiān)控主機：
至此，nagios 監(jiān)控外部信息完成！
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本文名稱：Nagios（三）——監(jiān)控外部信息（主機、服務）-創(chuàng)新互聯
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