Nagios（三）——监控外部信息（主机、服务）

Nagios 对主机的监控分为2种，像服务，端口，ping之类的监控属于外部信息监控；像内存，磁盘，swap这些信息的监控属于内部信息监控。外部信息监控可以通过安装Nagios 插件补丁来实现例如check_ping ；内部信息监控则需要通过NRPE 插件来实现，其原理为：客户机NRPE插件收集相关信息，服务端通过check_nrpe 来采集相关信息，并做相关处理。

一、监控外部信息

监控外部信息，只需要参照Nagios(二) 将Nagios 服务搭建起来，并且配置好欲监控的主机和服务即可。

1. 配置hosts.cfg

[root@server ~]# vim /usr/local/nagios/etc/hosts.cfg

define host{

use linux-server

host_name node-1

alias lamp

address 192.168.30.110

}

2. 配置services.cfg

[root@server etc]# vim services.cfg

define service{

use generic-service

host_name node-1

service_description ping

check_command check_ping!100.0,20%!500.0,60%

max_check_attempts 5

normal_check_interval 1

}

define service{

use generic-service

host_name node-1

service_description tcp

check_command check_tcp!22

max_check_attempts 5

normal_check_interval 1

}

define service{

use generic-service

host_name node-1

service_description http

check_command check_http

max_check_attempts 5

normal_check_interval 1

}

3.将services.cfg和hosts.cfg 引用进nagios

[root@server ~]# vim /usr/local/nagios/etc/nagios.cfg

cfg_file=/usr/local/nagios/etc/hosts.cfg

cfg_file=/usr/local/nagios/etc/services.cfg

4.用nagios自带的检查命令检查其配置是否正确

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

注意：由于这条命令较长而且使用的频率也较高，所以可以通过以下的方法快捷的运用

[root@server ~]# vim .bashrc

alias check='/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg'

[root@server ~]# source .bashrc

这样使用check命令即可直接调用-v 的命令，但只是当前登录有效。

命令运行结果如下：

[root@server ~]# check

Nagios Core 3.2.0

Copyright (c) 2009 Nagios Core Development Team and Community Contributors

Copyright (c) 1999-2009 Ethan Galstad

Last Modified: 08-12-2009

License: GPL

Website: http://www.nagios.org

Reading configuration data...

Read main config file okay...

Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...

Processing object config file '/usr/local/nagios/etc/hosts.cfg'...

Processing object config file '/usr/local/nagios/etc/services.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg'...

Read object config files okay...

Running pre-flight check on configuration data...

Checking services...

Checked 11 services.

Checking hosts...

Checked 2 hosts.

Checking host groups...

Checked 1 host groups.

Checking service groups...

Checked 0 service groups.

Checking contacts...

Checked 1 contacts.

Checking contact groups...

Checked 1 contact groups.

Checking service escalations...

Checked 0 service escalations.

Checking service dependencies...

Checked 0 service dependencies.

Checking host escalations...

Checked 0 host escalations.

Checking host dependencies...

Checked 0 host dependencies.

Checking commands...

Checked 24 commands.

Checking time periods...

Checked 5 time periods.

Checking for circular paths between hosts...

Checking for circular host and service dependencies...

Checking global event handlers...

Checking obsessive compulsive processor commands...

Checking misc settings...

Total Warnings: 0

Total Errors: 0 # 这里显示没有错误和警告说明启动没问题了

Things look okay - No serious problems were detected during the pre-flight check

5. 重启nagios

[root@server ~]# service nagios restart

Running configuration check...done.

Stopping nagios: done.

Starting nagios: done.

6. 测试

监控服务：



监控主机：



至此，nagios 监控外部信息完成！

相关软件包下载：http://down.51cto.com/data/699395