【移动应用开发技术】Nagios监控自动化

【移动应用开发技术】Nagios监控自动化

一、安装nagios下载/download.php?id=25308&ResourceID=7183tarfvxznagios-3.2.0.tar.gzcdnagios-3.2.0注：默认使用nagios用户，如果使用别的用户，必须在这里指定useraddnagiosmakeallmakeinstallmakeinstall-initmakeinstall-comandmodemakeinstall-configmakeinstall-webconfvim/etc/httpd/conf/httpd.confUsernagiosGroupnagiosservicehttpdrestart由于nagios的web控制台必须使用用户验证登陆，所以htpasswd-c/usr/local/nagios/etc/htpasswd.users

nagios以后再添加用户就不用加-c了vim/usr/local/nagios/etc/cgi.cfg

在所有的nagiosadmin后面添加nagiosservicenagiosstart访问：http://localhost/nagios但此时的nagios监控到的localhost居然是down状态原因是nagios是通过/usr/local/nagios/libexec下的各种插件来获取主机信息的，而此时此路径下没有安装任何的插件tarfvxz

/tmp/nagios-plugins-1.4.13.tarcdnagios-plugins-1.4.13./configure--prefix=/usr/local/nagios/makemakeinstall再访问：http://localhost/nagios就会发现localhost是up状态了二、配置/usr/local/nagios/etc/nagios.cfg是nagios的主配置文件，通过配置此文件指定各个单独配置文件的路径使得其生效cfg_file=/usr/local/nagios//etc/objects/commands.cfg(用什么监控？)cfg_file=/usr/local/nagios//etc/objects/contacts.cfg（有问题联系谁？）cfg_file=/usr/local/nagios//etc/objects/timeperiods.cfg（什么时间监控？默认即可）cfg_file=/usr/local/nagios//etc/objects/localhost.cfg（监控谁？包括主机和服务两种）

为了方便管理，我们需要在此文件中为每一个被监控的主机单独指定一个配置文件cfg_file=/usr/local/nagios//etc/objects/40.cfgcfg_file=/usr/local/nagios//etc/objects/42.cfg注：关于40.cfg的书写，请参考附件中的脚本注：commands.cfg文件中USER1代表/usr/local/nagios/libexec$HOSTADDRESS$是系统自带的变量，自动调用localhost.cfg文件中定义的主机definehost区域中的address$ARG1$是用户自定义的变量，需要在localhost.cfg文件中的check_command后添加!变量值localhost.cfg中的check_command调用的就是commands.cfg中的command_mand_name调用/usr/local/nagios/libexec中的check_*

但是，此时的nagios还只能监控本机，不能够监控远程主机。

如果要监控远程主机，需要配合使用nrpe。

原理：nagios服务端通过check_nrpe-H被监控的IP-c"command"把"command"命令传送给被监控端也就是nrpe服务端，nrpe服务端接收到命令后查找主配置文件nrpe.cfg中command["command"]匹配"command"，然后去执行对应的本地插件，把执行结果返回给

nagios服务端

注：nrpr的服务端是安装在被监控主机的，可以理解为nrpe是一个***程序

被监控端安装nrpetarfvxznrpe-2.12.tar.gzcdnrpe-2.12./configure--prefix=/usr/local/nagios2--with-nrpe-user=apache--with-nrpe-group=apache--with-nagios-user=apache--with-nagios-group=apachemakeallmakeinstall-daemonmakeinstall-daemon-configmakeinstall-xinetdmakeallecho"nrpe5666/tcp">>/etc/servicestarfvxz/home/yuchunyun/libexec.tgz-C/usr/local/nagios（把nagios服务端的插件拷贝过来）注：nrpe服务有两种启动方式。1:依赖于xinetd服务。2:单独配置文件方式启动。方式1：请确保xinetd服务已安装sed-is//41/g/etc/xinetd.d/nrpe/etc/init.d/xinetdrestartnetstat-nutlp|grepxinetd

会发现nrpe开启的的默认5666端口是以xinetd核心守护进程方式启动方式2：/usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe.cfg-dps-ef|grepnrpe会发现nrpe是一个单独的进程日志tail-f

/usr/local/nagios/var/nagios.log检查错误/usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfgNagios的check_*插件是用过返回值来判断的0成功

1警告

2严重错误

3未知三、自动化添加被监控主机先执行host.sh#!/bin/bash

#作者：yuchunyun

#时间：2014/03/14

#用途：此脚本用于监控主机nagios添加被监控端的主机定义

#用法：使用此脚本之前，请确保被监控端已安装nrpe服务，且本机具备连接其NRPE的权限

cfg_path=/usr/local/nagios//etc/objects

nagios_cfg=/usr/local/nagios/etc/nagios.cfg

read-p"pleaseinputthehostname(like41):"hostname

read-p"pleaseinputthealise(like141):"alise

read-p"pleaseinputtheipaddress(like41):"ip

host=`sed-n/$hostname/p$nagios_cfg`

if["$host"=""];then

echo"cfg_file=$cfg_path/$hostname.cfg">>$nagios_cfg

echo"definehost{

host_name$hostname

alias$alise

address$ip

check_commandcheck-host-alive

notification_optionsd,u,r

check_interval1

max_check_attempts2

contact_groupsadmins

notification_interval10

notification_period24x7

}">$cfg_path/$hostname.cfg

echo"#############################"

echo"thehost:$hostnamehadaddok"

echo"#############################"

else

echo"thehost:$hostnamehadalreadyexisted!!!"

fi再执行service.sh#!/bin/bash

#作者：yuchunyun

#时间：2014/03/14

#用途：此脚本用于监控主机nagios配置被监控端上的服务监控

#用法：使用此脚本之前请确保已用host.sh脚本定义了该被监控主机。由于监控插件有限，所以只能提供下面列出的监控模板！

cfg_path=/usr/local/nagios/etc/objects

nagios_cfg=/usr/local/nagios/etc/nagios.cfg

nagios_bin=/usr/local/nagios/bin/nagios

read-p"pleaseinputthehostnameyouhasbeenadded:"hostname

host=`sed-n/$hostname/p$nagios_cfg`

if["$host"=""];then

echo"thehost:$hostnameisundefind!!!"

else

for((i=0;i<10;i++));

do

echo"pleasechoosesomeservicestomonitor"

echo"###Example###

IDSERVICECOMMAND

1TotalUser>check_users;#监控系统登录人数

2SystemLoad>check_load;#监控系统负载

3TotalProces>check_total_procs;#监控系统进程数

4Disk>check_disk;#监控磁盘使用情况

5Memory>check_free_memory;#监控内存使用情况

6Contect>check_contect_est;#监控活动的网络连接数

7Httpdprocess>check_httpd_proces;#监监控apache进程数

8Nginxprocess>check_nginx_proces;#监控nginx进程数

9Phpprocess>check_php_proces;#监控php进程数

10Mysqlprocess>check_mysql_proces;#监控Mysql进程数

11Javaprocess>check_java_proces;#监控Java进程数

12quit"

echo-n"pleaseinpouttheIDyouwantcheck(1-10):"

readid

if[$id-eq1];then

echo"defineservice{

host_name$hostname

service_descriptionTotalUser

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_users

}">>$cfg_path/$hostname.cfg

echo"TotalUserhadmonitoredOK!"

elif[$id-eq2];then

echo"defineservice{

host_name$hostname

service_descriptionSystemLoad

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_load

}">>$cfg_path/$hostname.cfg

echo"SystemLoadhadmonitoredOK!"

elif[$id-eq3];then

echo"defineservice{

host_name$hostname

service_descriptionTotalProces

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_total_procs

}">>$cfg_path/$hostname.cfg

echo"TotalProceshadmonitoredOK!"

elif[$id-eq4];then

echo"defineservice{

host_name$hostname

service_descriptionDisk

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_disk

}">>$cfg_path/$hostname.cfg

echo"DiskhadmonitoredOK!"

elif[$id-eq5];then

echo"defineservice{

host_name$hostname

service_descriptionMemory

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_free_memory

}">>$cfg_path/$hostname.cfg

echo"MemoryhadmonitoredOK!"

elif[$id-eq6];then

echo"defineservice{

host_name$hostname

service_descriptionContect

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_contect

}">>$cfg_path/$hostname.cfg

echo"ContecthadmonitoredOK!"

elif[$id-eq7];then

echo"defineservice{

host_name$hostname

service_descriptionHttpdprocess

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_httpd_proces

}">>$cfg_path/$hostname.cfg

echo"HttpdprocesshadmonitoredOK!"

elif[$id-eq8];then

echo"defineservice{

host_name$hostname

service_descriptionNginxprocess

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_nginx_proces

}">>$cfg_path/$hostname.cfg

echo"NginxprocesshadmonitoredOK!"

elif[$id-eq9];then

echo"defineservice{

host_name$hostname

service_descriptionPhpprocess

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5

notification_period24x7

notification_optionsw,u,c,r

check_commandcheck_nrpe!check_php_proces

}">>$cfg_path/$hostname.cfg

echo"PhpprocesshadmonitoredOK!"

elif[$id-eq10];then

echo"defineservice{

host_name$hostname

service_descriptionMysqlprocess

check_period24x7

normal_check_interval2

retry_check_interval1

max_check_attempts5