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第 94 章 Nagios

目录

94.1. Install
94.1.1. Nagios core
94.1.2. Monitor Client nrpe
94.1.3. Monitoring Windows Machines
94.1.4. PNP4Nagios 图表插件
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. 配置监控设备
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. 端口检查
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. 插件开发手册

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

94.1. Install

94.1.1. Nagios core

Nagios 是一种开放源代码监视软件,它可以扫描主机、服务、网络方面存在的问题。Nagios 与其他类似的包之间的主要区别在于,Nagios 将所有的信息简化为“工作(working)”、“可疑的(questionable)”和“故障(failure)”状态,并且 Nagios 支持由插件组成的非常丰富的“生态系统”。这些特性使得用户能够进行有效安装,在此过程中无需过多地关心细节内容,只提供他们所需的信息即可。

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 的功能是向服务器发送监控数据, 而服务器端通过nagios-nrpe-plugin接收监控数据。

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
		

重启后生效

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

94.1.3. Monitoring Windows Machines

Nagios 可以监控windows服务器,需要安装下面软件。

NSClient++

http://sourceforge.net/projects/nscplus

94.1.4. PNP4Nagios 图表插件

http://www.pnp4nagios.org/