【移动应用开发技术】搭建Nagios监控平台

【移动应用开发技术】搭建Nagios监控平台

实验需求：在服务器（）上搭建nagios服务，监控本机和远端主机（）上的主机资源和网络服务实现：一.监控端（）配置1.安装相关的软件包#yuminstallhttpdphpgccglibcglibc-commongdgd-devellibpnglibjpegzlib2.创建相关的用户和组#useradd-s/sbin/nologinnagios#passwdnagios#groupaddnagcmd#usermod-Gnagcmdnagios#usermod-Gnagcmdapache3.安装nagios软件#tarxzfnagios-3.2.1.tar.gz#cdnagios-3.2.1#./configure--with-command-group=nagcmd#makeall#makeinstall#makeinstall-init#makeinstall-config#makeinstall-commandmode#makeinstall-webconf4.创建登录nagios的web页面授权用户#htpasswd-c/usr/local/nagios/etc/htpasswd.usersnagiosadmin//用户名最好使用nagiosadmin，因为配置文件中定义的管理员名称就是它。#servicehttpdrestart5.安装nagios插件#tarxzfnagios-plugins-1.4.11.tar.gz#cdnagios-plugins-1.4.11#./configure--with-nagios-user=nagios--with-nagios-group=nagios#make#makeinstall6.启动nagios服务#chkconfig--addnagios#chkconfignagioson#/usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfg#servicenagiosstart7.通过Web页面访问#http://localhost/nagios/二.监控端（）配置nagios监控本机1.定义监控命令#vim/usr/local/nagios/etc/objects/commands.cfgdefinecommand{

command_name

check-host-alive

command_line

$USER1$/check_ping-H$HOSTADDRESS$-w3000.0,80%-c5000.0,100%-p5

}默认已经定义一个命令叫做check-host-alive，当执行这个命令的时候，实际上就是执行/usr/local/nagios/libexec/check_ping

-H

$HOSTADDRESS$

-w

3000.0,80%

-c

5000.0,100%

-p

5其中/usr/local/nagios/libexec/目录很长，而且经常使用，所以被定义为宏变量，名为$USER1$。该变量在/usr/local/nagios/etc/resource.cfg中定义，$HOSTADDRESS$是执行命令时要传递给check_ping的参数根据需要按照既定的格式定义自己需要的命令：definecommand{

command_name

//定义监控命令的名字（自定义）

command_line

//定义命令具体实现的功能

}例：自定义监控对象，检查NFS服务是否在运行definecommand{

command_name

check_nfs

command_line

$USER1$/check_tcp-H$HOSTADDRESS$-p2049

}定义的命令名称为check_nfs，实际上是调用check_tcp命令检查2049端口2.定义监控对象#vim/usr/local/nagios/etc/objects/localhost.cfg

//localhost.cfg相当于是一个监控LINUX主机的模板，如果需要监控其他LINUX主机，可以把这个文件复制一份进行修改。

definehost{

use

linux-server

//监控使用的模板

host_name

localhost//被监控主机的主机名

alias

localhost//被监控主机的别名

address

//被监控主机的IP地址

}……defineservice{

use

local-service

host_name

localhost

service_description

NFS

check_command

check_nfs

notifications_enabled

0

}3.修改主配置文件（加载监控对象配置文件）#vim/usr/local/nagios/etc/nagios.cfg

//默认监控本机，不需要改动……cfg_file=/usr/local/nagios/etc/objects/commands.cfgcfg_file=/usr/local/nagios/etc/objects/contacts.cfgcfg_file=/usr/local/nagios/etc/objects/timeperiods.cfgcfg_file=/usr/local/nagios/etc/objects/templates.cfg……cfg_file=/usr/local/nagios/etc/objects/localhost.cfg4.检查配置文件是否有语法错误#/usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfg5.重启nagios服务#servicenagiosrestart6.登录web监控页面测试

http://localhost/nagios/三.监控远程主机（）公有数据1.新建监控对象文件#cd/usr/local/nagios/etc/object#cp-plocalhost.cfgwebserver1.cfg

//名称自定义2.修改监控对象配置文件#vimwebserver1.cfg

definehost{

use

linux-server

host_name

webserver1

//修改被监控端主机名

alias

webserver1

address

//修改被监控端IP

}……把主机组注释掉或删除掉#definehostgroup{#

hostgroup_name

linux-servers;Thenameofthehostgroup#

alias

LinuxServers;Longnameofthegroup#

members

localhost;Commaseparatedlistofhoststhatbelongtothisgroup#

}后续部分的服务，把localhost改为webserver13.修改主配置文件加载监控对象配置文件#vim/usr/local/nagios/etc/nagios.cfg……cfg_file=/usr/local/nagios/etc/objects/webserver1.cfg4.重启nagios服务即可四.监控远程主机（）私有数据4.1被监控端配置(1)在被控端创建相关用户和组#useraddnagios#passwdnagios(2)安装nagios插件#tarxzfnagios-plugins-1.4.6.tar.gz#cdnagios-plugins-1.4.6#./configure#make#makeinstall#chownnagios.nagios/usr/local/nagios#chown-Rnagios.nagios/usr/local/nagios/libexec(3)安装NRPE#tarxzfnrpe-2.12.tar.gz#cdnrpe-2.12#./configure#makeall#makeinstall-plugin#makeinstall-daemon#makeinstall-daemon-config#makeinstall-xinetd(4)启动NRPE#vim/etc/xinetd.d/nrpe……

only_from

=

//添加监控端IPvim/etc/services……nrpe5666/tcp#NRPE

//添加在最后#servicexinetdrestart#netstat-tulnp|grep5666tcp

0

0:::5666

:::*

LISTEN

2075/xinetd

(5)检查NRPE是否已经运行#/usr/local/nagios/libexec/check_nrpe-HlocalhostNRPEv2.12

//显示版本则成功(6)定义监控命令#vim/usr/local/nagios/etc/nrpe.cfg……command[check_users]=/usr/local/nagios/libexec/check_users-w5-c10command[check_load]=/usr/local/nagios/libexec/check_load-w15,10,5-c30,25,20command[check_sda1]=/usr/local/nagios/libexec/check_disk-w20%-c10%-p/dev/sda1command[check_sda3]=/usr/local/nagios/libexec/check_disk-w20%-c10%-p/dev/sda3command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs-w5-c10-sZcommand[check_total_procs]=/usr/local/nagios/libexec/check_procs-w150-c200

command[check_swap]=/usr/local/nagios/libexec/check_swap-w20%-c10%

……#servicexinetdrestart4.2监控端配置(1)安装NRPE#tarzxvfnrpe-2.12.tar.gz#cdnrpe-2.12/#./configure

#make#makeinstall#makeinstall-plugin(2)检测是否可以和被监控端进行通信#/usr/local/nagios/libexec/check_nrpe-HNRPEv2.12

//显示远程主机版本则成功(3)定义NRPE监控命令#vim/usr/local/nagios/etc/object/commands.cfg

……definecommand{

command_name

check_nrpe

command_line

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

}……(4)定义监控的内容#vim/usr/local/nagios/etc/object/webserver1.cfg……defineservice{

use

local-service

host_name

webserver1

service_description

CurrentUsers

check_command

check_nrpe!check_users

}调用check_nrpe命令，在远程主机webserver1上执行check_users的命令，check_users命令在远程主机/usr/local/nagios/etc/nrpe.cfg中定义。其他配置类似。defineservice{

use

local-service

host_name

webserver1

service_description

CurrentLoad

check_command

check_nrpe!check_load

}defineservice{

use

local-service

host_name

webserver1

service_description

BootPartition

check_command

check_nrpe!check_sda1

}defineservice{

use

local-service

host_name

webserver1

service_description

RootPartition

check_command

check_nrpe!check_sda3

}defineservice{

use

local-service