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第 20 章 Nagios

目录

20.1. Install
20.1.1. Nagios core
20.1.2. Monitor Client nrpe
20.1.3. Monitoring Windows Machines
20.1.4. PNP4Nagios 图表插件
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. 配置监控设备
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. 端口检查
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. 插件开发手册

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

20.1. Install

20.1.1. 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 ]
		

20.1.2. 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
		

20.1.3. 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

20.1.4. PNP4Nagios 图表插件

http://www.pnp4nagios.org/