写给自己 ：linux运维，自己动手趟一遍

目前越来越多的人都开始使用centos7了，就像win7超越xp一样，新技术永远是越来越让人慢慢接受的。为了快速布暑，全部使用yum安装。

环境

监控服务器：192.168.88.21

被监控客户端：192.168.88.22

关闭防火墙（全部服务器）

#systemctlstopfirewalld
#systemctldisablefirewalld
#setenforce0
#sed-i's/SELINUX=enforcing/SELINUX=disabled/g'/etc/selinux/config

更新时间同步（全部服务器）

#yuminstallntpdate
#ntpdatecn.pool.ntp.org
#echo"*/5****/usr/sbin/ntpdatecn.pool.ntp.org">>/var/spool/cron/root

安装epel源（全部服务器）

#yuminstallepel-release

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服务器端安装(192.168.88.21)

#yuminstallmariadb-servermariadb//默认数据库
#yuminstallhttpdPHPPHP-gd//apache+PHP环境
#yuminstallnagiosnagios-plugins-allnagios-plugins-nrpenrpe

#systemctlstartmariadb
#MysqL_secure_installation//初始化数据库

设置nagios访问用户名和密码，使用默认nagiosadmin和默认保存位置，省心

#htpasswd-c/etc/nagios/passwdnagiosadmin回车，设置密码

#systemctlstartmariadb
#systemctlstarthttpd
#systemctlstartnagios

登陆http://192.168.88.21/nagios/ 输入之前设置的用户名 nagiosadmin 及密码，就可以登入了。

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监控服务器端(192.168.88.21) 配置

添加nrpe的定义

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

#'check_nrpe'commanddefinition
definecommand{
command_namecheck_nrpe
command_line$USER1$/check_nrpe-H$HOSTADDRESS$-c$ARG1$
}
#'check_nrpe_memory'commanddefinition
definecommand{
command_namecheck_nrpe_memory
command_line$USER1$/check_nrpe-H$HOSTADDRESS$-ccheck_mem
}

新建监控主机配置文件

#vi/etc/nagios/objects/hosts.cfg
definehost{
uselinux-server
host_name192.168.88.22
alias192.168.88.22
address192.168.88.22
}

新建监控服务配置文件

#vi/etc/nagios/objects/services.cfg
defineservice{
uselocal-service
host_name192.168.88.22
service_descriptioncheck-host-alive
check_commandcheck-host-alive
}
defineservice{
usegeneric-service
host_name192.168.88.22
service_descriptionDiskPartition
check_commandcheck_nrpe!check_disk
}
defineservice{
usegeneric-service
host_name192.168.88.22
service_descriptionload
check_commandcheck_nrpe!check_load
}
defineservice{
usegeneric-service
host_name192.168.88.22
service_descriptionmemory
check_commandcheck_nrpe_memory
}
defineservice{
usegeneric-service
host_name192.168.88.22
service_descriptionswap
check_commandcheck_nrpe!check_swap
}

#nagios-v/etc/nagios/nagios.cfg检测配置文件是否正确
#systemctlrestartnagios重启一下nagios

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监控客户端安装(192.168.88.22)：

安装被监控的插件及nrpe

#yuminstallnagios-plugins-nrpenrpenagios-plugins-all

配置nrpe

#vi/etc/nagios/nrpe.cfg
allowed_hosts=127.0.0.1,192.168.88.21#允许被服务器监控

command[check_disk]=/usr/lib64/nagios/plugins/check_disk-w20%-c10%
command[check_swap]=/usr/lib64/nagios/plugins/check_swap-w20%-c10%
command[check_iostat]=/usr/lib64/nagios/plugins/check_iostat-dsda-w1000-c2000
command[check_mem]=/usr/lib64/nagios/plugins/check_mem-w80-c70

#echo'nrpe:192.168.88.21'>>/etc/hosts.allow

check_iostat所需要命令

#yuminstallsysstatbc

check_mem和check_iostat这二个检测插件，

请看附件下载，并解压到/usr/lib64/nagios/plugins 目录下

记得加执行权限

#chmod+xcheck_iostatcheck_mem

启动nrpe

#systemctlstartnrpe

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打开浏览器，查看一下，是否能正常监控到数据了：