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第 20 章 Nagios

目錄

20.1. Install
20.1.1. Nagios core
20.1.2. Monitor Client nrpe
20.1.3. Monitoring Windows Machines
20.1.4. PNP4Nagios 圖表插件
20.2. nagios
20.3. nrpe node
20.4. 配置 Nagios
20.4.1. authorized
20.4.2. contacts
20.4.3. hostgroups
20.4.4. generic-service
20.4.5. SOUND OPTIONS
20.4.6. SMS 短信
20.4.7. nrpe plugins
20.5. 配置監控設備
20.5.1. routers
20.5.2. host
20.5.3. service
20.5.3.1. http
20.5.3.2. mysql hosts
20.5.3.3. check_tcp
20.6. Nagios Plugins
20.6.1. check_ping
20.6.2. check_procs
20.6.3. check_users
20.6.4. check_http
20.6.5. check_mysql
20.6.5.1. check_mysql
20.6.5.2. mysql.cfg check_mysql_replication
20.6.5.3. nrpe.cfg check_mysql_replication
20.6.6. Disk
20.6.6.1. disk.cfg
20.6.6.2. check_disk
20.6.6.3. disk-smb.cfg
20.6.7. check_tcp
20.6.7.1. 連接埠檢查
20.6.7.2. Memcache
20.6.7.3. Redis
20.6.8. check_log
20.6.9. check_traffic
20.6.10. Nagios nrpe plugins
20.6.11. check_nt
20.6.12. nsca - Nagios Service Check Acceptor
20.6.13. jmx
20.7. FAQ
20.7.1. Macro Name
20.7.2. 插件開發手冊

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

20.1. Install

20.1.1. 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 ]
		

20.1.2. 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
		

20.1.3. 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

20.1.4. PNP4Nagios 圖表插件

http://www.pnp4nagios.org/