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第 18 章 Nagios

目錄

18.1. Install
18.1.1. Nagios core
18.1.2. Monitor Client nrpe
18.1.3. Monitoring Windows Machines
18.1.4. PNP4Nagios 圖表插件
18.2. nagios
18.3. nrpe node
18.4. 配置 Nagios
18.4.1. authorized
18.4.2. contacts
18.4.3. hostgroups
18.4.4. generic-service
18.4.5. SOUND OPTIONS
18.4.6. SMS 短信
18.4.7. nrpe plugins
18.5. 配置監控設備
18.5.1. routers
18.5.2. host
18.5.3. service
18.5.3.1. http
18.5.3.2. mysql hosts
18.5.3.3. check_tcp
18.6. Nagios Plugins
18.6.1. check_ping
18.6.2. check_procs
18.6.3. check_users
18.6.4. check_http
18.6.5. check_mysql
18.6.5.1. check_mysql
18.6.5.2. mysql.cfg check_mysql_replication
18.6.5.3. nrpe.cfg check_mysql_replication
18.6.6. Disk
18.6.6.1. disk.cfg
18.6.6.2. check_disk
18.6.6.3. disk-smb.cfg
18.6.7. check_tcp
18.6.7.1. 連接埠檢查
18.6.7.2. Memcache
18.6.7.3. Redis
18.6.8. check_log
18.6.9. check_traffic
18.6.10. Nagios nrpe plugins
18.6.11. check_nt
18.6.12. nsca - Nagios Service Check Acceptor
18.6.13. jmx
18.7. FAQ
18.7.1. Macro Name
18.7.2. 插件開發手冊

homepage: http://www.nagios.org/

18.1. Install

18.1.1. Nagios core

Nagios 是一種開放原始碼監視軟件,它可以掃瞄主機、服務、網絡方面存在的問題。Nagios 與其他類似的包之間的主要區別在於,Nagios 將所有的信息簡化為“工作(working)”、“可疑的(questionable)”和“故障(failure)”狀態,並且 Nagios 支持由插件組成的非常豐富的“生態系統”。這些特性使得用戶能夠進行有效安裝,在此過程中無需過多地關心細節內容,只提供他們所需的信息即可。

install

$ sudo apt-get install nagios3 nagios-nrpe-plugin
		

add user nagiosadmin for nagios

$ sudo htpasswd -c /etc/nagios2/htpasswd.users nagiosadmin
New password:
Re-type new password:
Adding password for user nagiosadmin
		

Create a new nagcmd group for allowing external commands to be submitted through the web interface. Add both the nagios user and the apache user to the group.

$ groupadd nagcmd
$ sudo usermod -a -G nagcmd nagios
$ sudo usermod -a -G nagcmd www-data
$ cat /etc/group
nagcmd:x:1003:nagios,www-data
		

reload apache

$ sudo /etc/init.d/apache2 reload
 * Reloading web server config apache2                    [ OK ]
		

18.1.2. Monitor Client nrpe

		
nagios-nrpe-server --------> nagios core (nagios-nrpe-plugin)
		
		

nagios-nrpe-server 的功能是向伺服器發送監控數據, 而伺服器端通過nagios-nrpe-plugin接收監控數據。

sudo apt-get install nagios-nrpe-server nagios-plugins
		

/etc/nagios/nrpe.cfg

/etc/nagios/nrpe_local.cfg

$ sudo vim /etc/nagios/nrpe_local.cfg
allowed_hosts=172.16.1.2

command[check_users]=/usr/lib/nagios/plugins/check_users -w 5 -c 10
command[check_load]=/usr/lib/nagios/plugins/check_load -w 15,10,5 -c 30,25,20
command[check_zombie_procs]=/usr/lib/nagios/plugins/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200
command[check_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200
command[check_swap]=/usr/lib/nagios/plugins/check_swap -w 20% -c 10%
command[check_all_disks]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -e
command[check_disk_root]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /
command[check_disk_home]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /home
command[check_sda_iostat]=/usr/lib/nagios/plugins/check_iostat -d sda -w 100 -c 200
command[check_sdb_iostat]=/usr/lib/nagios/plugins/check_iostat -d sdb -w 100 -c 200
# command[check_uri_user]=/usr/lib/nagios/plugins/check_http -I 127.0.0.1 -p 80 -u http://example.com/test/ok.php
# command[check_mysql]=/usr/lib/nagios/plugins/check_mysql -H localhost -u root -ppassword test -P 3306
		

重啟後生效

/etc/init.d/nagios-nrpe-server restart
		

18.1.3. Monitoring Windows Machines

Nagios 可以監控windows伺服器,需要安裝下面軟件。

NSClient++

http://sourceforge.net/projects/nscplus

18.1.4. PNP4Nagios 圖表插件

http://www.pnp4nagios.org/