Nagios的功能、插件-51CTO.COM

Nagios监控

bin	Nagios执行程序所在目录，nagios文件即为主程序
etc	Nagios配置文件位置
sbin	Nagios Cgi文件所在目录，也就是执行外部命令所需文件所在的目录
Share	Nagios网页文件所在的目录
Var	Nagios日志文件、spid 等文件所在的目录
var/archives	日志归档目录
var/rw	用来存放外部命令文件
libexec	存放nagios插件

上面监控windows使用了check_nt插件(插件都放在/usr/local/nagios/libexec)

[root@cxy ~]# ls /usr/local/nagios/libexec/

check_apt check_ftp check_mailq check_overcr check_tcp

check_breeze check_http check_mrtg check_ping check_time

check_by_ssh check_icmp check_mrtgtraf check_pop check_udp

check_clamd check_ide_smart check_nagios check_procs check_ups

check_cluster check_ifoperstatus check_nntp check_real check_users

check_dhcp check_ifstatus check_nntps check_rpc check_wave

check_dig check_imap check_nrpe check_sensors negate

check_disk check_ircd check_nt check_simap urlize

可以看到有很多插件我们也可以使用帮助来自己写监控代码

例如查看check_nt帮助

[root@cxy libexec]# pwd

/usr/local/nagios/libexec

[root@cxy libexec]# ./check_nt -h

Usage:check_nt -H host -v variable [-p port] [-w warning] [-c critical][-l params] [-d SHOWALL] [-t timeout]

#监控CPU写法

CPULOAD =

Average CPU load on last x minutes.

Request a -l parameter with the following syntax:

-l <minutes range>,<warning threshold>,<critical threshold>.

<minute range> should be less than 24*60.

Thresholds are percentage and up to 10 requests can be done in one shot.

ie: -l 60,90,95,120,90,95

#完整写法为

check_nt!CPULOAD!-l 5,80,90

check_nt调用cpuload,5分钟内负载平均达到80%为warning,负载达到90%为critical

监控磁盘使用

USEDDISKSPACE =

Size and percentage of disk use.

Request a -l parameter containing the drive letter only.

Warning and critical thresholds can be specified with -w and -c.

#如果要监控C盘,达到80%报警,达到90%为严重危险

check_nt!USEDDISKSPACE!-l c -w 80 -c 90

nagios文件关系图

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