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第 18 章 Nagios

目录

18.1. Install
18.1.1. Nagios core
18.1.2. Monitor Client nrpe
18.1.3. Monitoring Windows Machines
18.1.4. PNP4Nagios 图表插件
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. 配置监控设备
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. 端口检查
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. 插件开发手册

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

18.1. Install

18.1.1. 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 ]
		

18.1.2. 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
		

18.1.3. 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

18.1.4. PNP4Nagios 图表插件

http://www.pnp4nagios.org/