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第 94 章 Nagios

目錄

94.1. Install
94.1.1. Nagios core
94.1.2. Monitor Client nrpe
94.1.3. Monitoring Windows Machines
94.1.4. PNP4Nagios 圖表插件
94.2. nagios
94.3. nrpe node
94.4. 配置 Nagios
94.4.1. authorized
94.4.2. contacts
94.4.3. hostgroups
94.4.4. generic-service
94.4.5. SOUND OPTIONS
94.4.6. SMS 短信
94.4.7. nrpe plugins
94.5. 配置監控設備
94.5.1. routers
94.5.2. host
94.5.3. service
94.5.3.1. http
94.5.3.2. mysql hosts
94.5.3.3. check_tcp
94.6. Nagios Plugins
94.6.1. check_ping
94.6.2. check_procs
94.6.3. check_users
94.6.4. check_http
94.6.5. check_mysql
94.6.5.1. check_mysql
94.6.5.2. mysql.cfg check_mysql_replication
94.6.5.3. nrpe.cfg check_mysql_replication
94.6.6. Disk
94.6.6.1. disk.cfg
94.6.6.2. check_disk
94.6.6.3. disk-smb.cfg
94.6.7. check_tcp
94.6.7.1. 連接埠檢查
94.6.7.2. Memcache
94.6.7.3. Redis
94.6.8. check_log
94.6.9. check_traffic
94.6.10. Nagios nrpe plugins
94.6.11. check_nt
94.6.12. nsca - Nagios Service Check Acceptor
94.6.13. jmx
94.7. FAQ
94.7.1. Macro Name
94.7.2. 插件開發手冊

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

94.1. Install

94.1.1. 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 ]
		

94.1.2. 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
		

94.1.3. 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

94.1.4. PNP4Nagios 圖表插件

http://www.pnp4nagios.org/