CentOS 6.4上通过yum安装Nagios-3.5.0

原文见：http://sharadchhetri.com/2013/05/19/installing-nagios-3-5-0-in-centos-6-4-using-yum/

#安装：

rpm -ivh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

yum install nagios nagios-devel nagios-plugins* gd gd-devel httpd php gcc glibc glibc-common openssl

#设置密码， 默认用户名和密码都是nagiosadmin

htpasswd -c /etc/nagios/passwd nagiosadmin #回车然后输入密码

#检查以下配置是否一样：vi /etc/nagios/cgi.cfg

=============================

    # AUTHENTICATION USAGE

    use_authentication=1

    # SYSTEM/PROCESS INFORMATION ACCESS

    authorized_for_system_information=nagiosadmin

    # CONFIGURATION INFORMATION ACCESS

    authorized_for_configuration_information=nagiosadmin

    # SYSTEM/PROCESS COMMAND ACCESS

    authorized_for_system_commands=nagiosadmin

    # GLOBAL HOST/SERVICE VIEW ACCESS

    authorized_for_all_services=nagiosadmin

    authorized_for_all_hosts=nagiosadmin

    # GLOBAL HOST/SERVICE COMMAND ACCESS

    authorized_for_all_service_commands=nagiosadmin

    authorized_for_all_host_commands=nagiosadmin

#========================================

#设置开机自启动:

chkconfig --level 3 nagios on

chkconfig --level 3 httpd on

#启动：

/etc/init.d/httpd start

/etc/init.d/nagios start

#注意SELINUX和IPTABLE 以及你的80端口是否被占用

安装完成，http://ip/nagios 就能看到效果

下面配置要管理的节点：

#新建这个文件，里面添加要监控的机器

#vi /etc/nagios/conf.d/hosts.cfg

#===================

define host{

use linux-server

host_name mysql-node01

alias mysql-node01

address 192.168.1.110  #这个IP是我mysql机器所的IP

}

#=================

#添加被监控机器需要被监控那些项目 

#vi /etc/nagios/conf.d/services.cfg

#===========================

define service{

use generic-service

host_name mysql-node01

service_description PING

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

}

define service{

use generic-service

host_name mysql-node01

service_description Current Load

check_command check_nrpe!check_load

}

define service{

use generic-service

host_name mysql-node01

service_description Total Processes

check_command check_nrpe!check_users

}

#===========================

#这里对mysql那台机器进行了3项监控: ping load totalProcesses

#其中ping没用到nrpe

#在末尾为nrpe添加命令

#vi /etc/nagios/objects/commands.cfg

#===========================

define command{

command_name check_nrpe

command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

}

#===========================

#各种重启

/etc/init.d/nagios restart

/etc/init.d/nrpe restart

/etc/init.d/httpd restart

注意iptables，服务端和客户端均需要5666端口能被互相访问

参考此文配置客户端：

原文见：http://sharadchhetri.com/2013/03/02/how-to-install-and-configure-nagios-nrpe-in-centos-and-red-hat/

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#安装nrpe

rpm -ivh dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

 

yuminstall-y nrpe nagios-plugins-all openssl

 

#修改配置文件,先备份是好习惯

vi/etc/nagios/nrpe.cfg

#找到allowed_hosts=127.0.0.1，在后面加上server端的IP，这样server端才能监控这台机器，比如我加的：

allowed_hosts=127.0.0.1,192.168.1.103

 

#开机自启

chkconfig --level 3 on

 

#启动

/etc/init.d/nrpestart

配置完后，刷新nagios页面，就能看到mysql-node01了