CentOS下Nagios的安装与配置-营山大橙子建站

新闻中心

这里有您想知道的互联网营销解决方案

CentOS下Nagios的安装与配置

成都创新互联是一家专注于成都网站制作、做网站、外贸营销网站建设与策划设计,平山网站建设哪家好?成都创新互联做网站,专注于网站建设十多年,网设计领域的专业建站公司;建站业务涵盖:平山等地区。平山做网站价格咨询:028-86922220

Nagios是一款开源的电脑系统和网络监视工具，能有效监控Windows、Linux和Unix的主机状态，交换机路由器等网络设置，打印机等。

Nagios可以识别4种状态返回信息，即 0(OK)表示状态正常/绿色、1(WARNING)表示出现警告/***、2(CRITICAL)表示出现非常严重的错误/红色、3(UNKNOWN)表示未知错误/深***。

一、环境

Host NameOSIPSoftware

Nagios-ServerCentOS release 6.3 (Final)192.168.1.108Apache、Php、Nagios、nagios-plugins

Nagios-LinuxCentOS release 5.8 (Final)192.168.1.111nagios-plugins、nrpe

Nagios-WindowsWindows XP192.168.1.113 NSClient++

防火墙已关闭/iptables: Firewall is not running.

SELINUX=disabled

二、Nagios服务端安装

基础支持套件：gcc glibc glibc-common gd gd-devel xinetd openssl-devel

2.1创建nagios用户和用户组

useradd -s /sbin/nologin nagios

mkdir /usr/local/nagios

chown -R nagios.nagios /usr/local/nagios

2.2编译安装Nagios

wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.4.3.tar.gz

tar zxvf nagios-3.4.3.tar.gz

cd nagios

./configure --prefix=/usr/local/nagios

make all

make install

make install-init

make install-commandmode

make install-config

chkconfig --add nagios

chkconfig --level 35 nagios on

chkconfig --list nagios

2.3安装Nagios 插件

wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz

wget http://nagios-plugins.org/download/nagios-plugins-2.0.3.tar.gz

tar xzvf nagios-plugins-1.5.tar.gz

cd nagios-plugins-1.5

./configure --prefix=/usr/local/nagios

make && make install

2.4安装配置Apache、PHP

yum -y install httpd php //如果已经安装此步骤略过；

2.4.1配置apache主配置文件

vim /etc/httpd/conf/httpd.conf

找到

User apache

Group apache

更改为

User nagios

Group nagios

找到

DirectoryIndex index.html

更改为

DirectoryIndex index.html index.php

在下一行新增如下内容：

AddType application/x-httpd-php .php

为了安全起见，一般情况下要让nagios 的web 监控页面必须经过授权才能访问，这需要增加验证配置，即在httpd.conf 文件最后添加如下信息：

#setting for nagios
ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"

     AuthType Basic
     Options ExecCGI
     AllowOverride None
     Order allow,deny
     Allow from all
     AuthName "Nagios Access"
     AuthUserFile /usr/local/nagios/etc/htpasswd             //用于此目录访问身份验证的文件
     Require valid-user

Alias /nagios "/usr/local/nagios/share"

     AuthType Basic
     Options None
     AllowOverride None
     Order allow,deny
     Allow from all
     AuthName "nagios Access"
     AuthUserFile /usr/local/nagios/etc/htpasswd
     Require valid-user

保存退出；

2.4.2创建apache目录验证文件及启动apache服务

htpasswd -c /usr/local/nagios/etc/htpasswd david

cat /usr/local/nagios/etc/htpasswd

service httpd restart

到这里 Nagios 安装及基本配置已经完成了；测试访问一下：

http://ip地址/nagios

用户名

密码

2.5配置Nagios

2.5.1配置联系人信息

cp /usr/local/nagios/etc/objects/contacts.cfg /usr/local/nagios/etc/objects/contacts.cfg.bak

vim /usr/local/nagios/etc/objects/contacts.cfg

更改

contact_name david

email 744120325@qq.com

contactgroup_name ts

members david

2.5.2配置主机信息

touch /usr/local/nagios/etc/objects/hosts.cfg

vim /usr/local/nagios/etc/objects/hosts.cfg

新增如下内容：

define host{

use linux-server

host_name hostname01

alias hostname01

address 192.168.1.111

}

define host{

use linux-server

host_name hostname02

alias hostname02

address 192.168.1.112

}

define hostgroup{

hostgroup_name bsmart-servers

alias bsmart servers

members hostname01,hostname02

}

--------------------------------------

vim /etc/hosts

新增

ip地址 hostname //192.168.122.128 localhost

--------------------------------------

由于本实验也测试监控安装Nagios服务端的这台服务器，所以需要配置 localhost.cfg 文件；

cp /usr/local/nagios/etc/objects/localhost.cfg /usr/local/nagios/etc/objects/localhost.cfg.bak

vim /usr/local/nagios/etc/objects/localhost.cfg

在文件尾新增如下内容：

define service{

use local-service ; Name of service template to use

host_name localhost

service_description MySQL

check_command check_mysql

notifications_enabled 0

}

define service{

use local-service ; Name of service template to use

host_name localhost

service_description FTP

check_command check_ftp

notifications_enabled 0

}

2.5.3配置时间信息

cp /usr/local/nagios/etc/objects/timeperiods.cfg /usr/local/nagios/etc/objects/timeperiods.cfg.bak

vim /usr/local/nagios/etc/objects/timeperiods.cfg

根据需要配置，一般不需要更改，默认即可；

2.5.4配置服务信息

touch /usr/local/nagios/etc/objects/services.cfg

vim /usr/local/nagios/etc/objects/services.cfg

新增如下内容：

define service{

use local-service

host_name localhost

service_description check-host-alive

check_command check-host-alive

}

2.5.5配置命令信息

cp /usr/local/nagios/etc/objects/commands.cfg /usr/local/nagios/etc/objects/commands.cfg.bak

vim /usr/local/nagios/etc/objects/commands.cfg

新增如下内容：

# 'check_mysql' command definition

define command{

command_name check_mysql

command_line $USER1$/check_mysql -H $HOSTADDRESS$ $ARG1$

}

2.5.6配置模板配置信息

nagios主要用于监控主机资源以及服务，在nagios配置中称为对象，为了不必重复定义一些监控对象，Nagios引入了一个模板配置文件，将一些共性的属性定义成模板，以便于多次引用。这就是templates.cfg的作用。

更改

contact_groups ts

2.5.7配置CGI信息

想通过web监控界面执行cgi脚本，例如重启nagios进程、关闭nagios通知、停止nagios主机检测等;需要配置，否则默认即可；

cp /usr/local/nagios/etc/cgi.cfg /usr/local/nagios/etc/cgi.cfg.bak

vim /usr/local/nagios/etc/cgi.cfg

更改

default_user_name=david

authorized_for_system_information=nagiosadmin,david

authorized_for_configuration_information=nagiosadmin,david

authorized_for_system_commands=david

authorized_for_all_services=nagiosadmin,david

authorized_for_all_hosts=nagiosadmin,david

authorized_for_all_service_commands=nagiosadmin,david

authorized_for_all_host_commands=nagiosadmin,david

2.5.8配置Nagios主配置文件信息

cp /usr/local/nagios/etc/nagios.cfg /usr/local/nagios/etc/nagios.cfg.bak

vim /usr/local/nagios/etc/nagios.cfg

新增如下内容：

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

保存退出即可；

2.5.9验证Nagios配置文件的正确性

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

如果最后显示出来如下信息，即表是没问题：

Total Warnings: 0

Total Errors: 0

---------------------------------------

2.6安装NRPE

wget http://prdownloads.sourceforge.net/sourceforge/nagios/nrpe-2.13.tar.gz
tar zxvf nrpe-2.13.tar.gz
cd nrpe-2.13
./configure

make all

make install-plugin

-------------------------

#/usr/local/nagios/libexec/check_nrpe -H 192.168.1.235 //测试一下监控机使用check_nrpe 与被监控机运行的nrpe daemon之间的通信;

-------------------------

vim //usr/local/nagios/etc/objects/commands.cfg

新增如下内容：

# 'check_nrpe' command definition
define command{
        command_name    check_nrpe         # 定义命令名称为check_nrpe,在services.cfg中要使用这个名称.
        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$       #这是定义实际运行的插件程序.
                        # 这个命令行的书写要完全按照check_nrpe这个命令的用法,不知道用法的就用check_nrpe –h查看.
        }

2.7重启各相关的服务

service httpd restart

service nagios restart

service postfix restart

三、客户端（被监控机）安装配置（Linux）

基础支持套件：gcc glibc glibc-common gd gd-devel xinetd openssl-devel

3.1新建用户

useradd nagios

3.2安装Nagios插件

wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz

wget http://nagios-plugins.org/download/nagios-plugins-2.0.3.tar.gz

tar xzvf nagios-plugins-1.5.tar.gz

cd nagios-plugins-1.5

./configure --prefix=/usr/local/nagios

make && make install

chown nagios.nagios /usr/local/nagios
chown -R nagios.nagios /usr/local/nagios/libexec

3.3安装NRPE

wget http://prdownloads.sourceforge.net/sourceforge/nagios/nrpe-2.13.tar.gz
tar zxvf nrpe-2.13.tar.gz
cd nrpe-2.13
./configure

make all

make install-plugin

make install-daemon

make install-daemon-config

make install-xinetd

vim /etc/xinetd.d/nrpe

在only_from 后增加监控主机的IP地址；

vim /etc/services

增加NRPE服务:nrpe 5666/tcp

service xinetd restart

netstat -an | grep 5666 //查看NRPE 是否已经启动;

/usr/local/nagios/libexec/check_nrpe -H localhost //测试NRPE 是否工作正常;

注：为了后面工作的顺利进行，注意本地防火墙要打开5666能让外部的监控机访问。

3.4定义对Nagios-Linux 主机的监控

下面就可以在services.cfg(服务器上的配置文件)中定义对Nagios-Linux 主机的监控了:

define service{
        use                     local-service
        host_name               Nagios-Linux
        service_description     Current Load
        check_command           check_nrpe!check_load
        }

define service{
        use                     local-service
        host_name               Nagios-Linux
        service_description     Check Disk
        check_command           check_nrpe!check_disk
        }

define service{
        use                     local-service
        host_name               Nagios-Linux
        service_description     Total Processes
        check_command           check_nrpe!check_total_procs
        }

define service{
        use                     local-service
        host_name               Nagios-Linux
        service_description     Current Users
        check_command           check_nrpe!check_users
        }

define service{
        use                     local-service
        host_name               Nagios-Linux
        service_description     Check Zombie Procs
        check_command           check_nrpe!check_zombie_procs
        }

---------------------------------------------------------

如果还需要监控其它服务的，请在上面的文件增加相应的服务项以及在被监控机上相应增加，如：

例：增加HTTP监控：

监控机：

vim /usr/local/nagios/etc/objects/services.cfg

新增如下内容：

define service{
        use                     local-service
        host_name               Nagios-Linux
        service_description     HTTP
        check_command           check_nrpe!check_http
        }

被监控机：

vim /usr/local/nagios/etc/nrpe.cfg

新增如下内容：

command[check_http]=/usr/local/nagios/libexec/check_http -I 127.0.0.1

注：更改过配置的都要重启一下相应服务才能生效；

参考 http://www.cnblogs.com/mchina/archive/2013/02/20/2883404.html

当前标题：CentOS下Nagios的安装与配置
URL标题：http://scyingshan.cn/article/jpiihi.html

新闻中心

其他资讯