Nagios監(jiān)控工具

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不會(huì)顯示具體的值，僅顯示主機(jī)或服務(wù)的狀態(tài)

強(qiáng)大的報(bào)警功能

高度插件化

Nagios監(jiān)控主機(jī)/服務(wù)顯示的4種狀態(tài)

WARNING

CRITICAL

UNKNOWN

Nagios對(duì)象：

主機(jī)，主機(jī)組

服務(wù)/資源，服務(wù)組

聯(lián)系人，聯(lián)系人組

時(shí)間段

命令(模板--->應(yīng)用到某個(gè)被監(jiān)控對(duì)象，以實(shí)現(xiàn)監(jiān)控)

Nagios實(shí)現(xiàn)監(jiān)控的方式：

check_by_ssh

check_by_nrpe：專(zhuān)用于監(jiān)控Linux或Unix主機(jī)

check_by_nsclient++：用于監(jiān)控Windows主機(jī)

check_by_snmp

check_by_nsca：實(shí)現(xiàn)被動(dòng)方式的nagios，由被監(jiān)控對(duì)象主動(dòng)向nagios發(fā)送狀態(tài)信息

check_by_xyz：自定義監(jiān)控方式/腳本

安裝nagios

1、安裝依賴(lài)的軟件

# yum install -y httpd php php-MySQL mysql-devel mysql

2、創(chuàng)建nagios運(yùn)行需要的用戶(hù)和組

# groupadd nagcmd

# useradd -G nagcmd nagios

將運(yùn)行apache進(jìn)程的用戶(hù)加入到nagcmd組中

# usermod -a -G nagcmd apache

3、安裝nagios

# tar zxf nagios-3.3.1.tar.gz

# cd nagios

# ./configure --with-command-group=nagcmd --enable-event-broker --sysconfdir=/etc/nagios

# make all

# make install

# make install-init

# make install-commandmode

# make install-config

# make install-webconf

創(chuàng)建一個(gè)登錄nagios web頁(yè)面的用戶(hù)，這個(gè)用戶(hù)賬號(hào)在以后通過(guò)web登錄nagios時(shí)使用

# htpasswd -c /etc/nagios/htpasswd.users nagiosadmin

New password:

Re-type new password:

Adding password for user nagiosadmin

啟動(dòng)httpd服務(wù)

# service httpd start

4、安裝nagios-plugins插件

# tar zxf nagios-plugins-1.5.tar.gz

# cd nagios-plugins-1.5

# ./configure --with-nagios-user=nagios --with-nagios-group=nagios

# make && make install

5、啟動(dòng)nagios服務(wù)

# chkconfig --add nagios

# service nagios start

6、訪(fǎng)問(wèn)nagios

http://10.1.1.2/nagios

配置nagios

nagios配置文件保存在/etc/nagios目錄下

nagios插件目錄

/usr/local/nagios/libexec

nagios監(jiān)控windows主機(jī)

SNMP

NSClient++

nagios通過(guò)check_nt插件與windows NSClient++通信

NSClient++可提供check_nt，check_nrpe及NSCA的能力

NSClient++監(jiān)聽(tīng)在12489/tcp端口與check_nt插件通信

配置check_nt與NSClient++監(jiān)控windows主機(jī)

1、定義命令command

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

define command{

command_name check_nt

command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v $ARG1$ $ARG2$

}

2、定義主機(jī)host及服務(wù)service

# vim /etc/nagios/objects/windows.cfg

define host{

use windows-server ; Inherit default values from a template

host_name winhost; The name we're giving to this host

alias My Windows Server ; A longer name associated with the host

address 10.1.1.254 ; IP address of the host

}

define service{

use generic-service

host_name winhost

service_description Uptime

check_command check_nt!UPTIME

}

3、啟用主機(jī)配置文件

# vim /etc/nagios/nagios.cfg

cfg_file=/etc/nagios/objects/windows.cfg

4、檢測(cè)配置文件語(yǔ)法，并重啟nagios服務(wù)

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

# service nagios restart

瀏覽器訪(fǎng)問(wèn)http://10.1.1.2/nagios查看監(jiān)控狀態(tài)數(shù)據(jù)

配置check_nrpe監(jiān)控Linux及windows主機(jī)

監(jiān)控端通過(guò)check_nrpe與被監(jiān)控端nrpe進(jìn)程通信

nrpe監(jiān)聽(tīng)在5666/tcp端口

監(jiān)控端、被監(jiān)控端都需要安裝nrpe addon，被監(jiān)控端需要啟動(dòng)nrpe服務(wù)

一、監(jiān)控Linux 主機(jī)10.1.1.1

1、在被監(jiān)控主機(jī)上安裝nrpe并配置

1)創(chuàng)建nagios用戶(hù)

# useradd -s /sbin/nologin nagios

2)nrpe依賴(lài)于nagios-plugins，安裝nagios-plugins

# tar zxf nagios-plugins-1.4.14.tar.gz

# cd nagios-plugins-1.4.14

# ./configure --with-nagios-user=nagios --with-nagios-group=nagios

# make all

# make install

3)安裝nrpe

# tar zxf nrpe-2.15.tar.gz

# cd nrpe-2.15

# ./configure --with-nrpe-user=nagios --with-nrpe-group=nagios --with-nagios-user=nagios --with-nagios-group=nagios --enable-command-args --enable-ssl

# make all

# make install-plugin

# make install-daemon

# make install-daemon-config

4）配置nrpe

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

log_facility=daemon

pid_file=/var/run/nrpe.pid

server_port=5666

server_address=10.1.1.1

nrpe_user=nagios

nrpe_group=nagios

allowed_hosts=10.1.1.2

command_timeout=60

定義監(jiān)控本地資源的命令

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10

command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20

command[check_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1

command[check_sda2]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda2

command[check_sda3]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda3

command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z

command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200

5)編寫(xiě)啟動(dòng)nrpe服務(wù)腳本

# vim /etc/rc.d/init.d/nrpe

#!/bin/bash

# chkconfig: 2345 88 12

# description: NRPE DAEMON

NRPE=/usr/local/nagios/bin/nrpe

NRPECONF=/usr/local/nagios/etc/nrpe.cfg

case $1 in

start)

echo -n "Starting NRPE damon...."

$NRPE -c $NRPECONF -d

echo "Done..."

;;

stop)

echo -n "Stopping NRPE daemon...."

pkill -u nagios nrpe

echo "Done...."

;;

restart)

$0 stop

sleep 2

$0 start

;;

echo "Usage: $0 { start | stop | restart }"

;;

esac

exit 0

# chmod +x /etc/rc.d/init.d/nrpe

# chkconfig --add nrpe

# service nrpe start

# netstat -tnlp

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

tcp 0 0 10.1.1.1:5666 0.0.0.0:* LISTEN 6826/nrpe

2、在監(jiān)控端安裝nrpe

1)安裝nrpe

# tar zxf nrpe-2.15.tar.gz

# cd nrpe-2.15

# ./configure --with-nrpe-user=nagios --with-nrpe-group=nagios --with-nagios-user=nagios --with-nagios-group=nagios --enable-command-args --enable-ssl

# make all

# make install-plugin

安裝完成后，在/usr/local/nagios/libexec目錄下會(huì)產(chǎn)生check_nrpe插件

通過(guò)以下命令可測(cè)試插件是否工作正常

# ./check_nrpe -H 10.1.1.1

NRPE v2.15

3、配置監(jiān)控Linux主機(jī)

1)定義命令command

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

define command{

command_name check_nrpe

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

}

2)定義主機(jī)host及服務(wù)service

# cp /etc/nagios/objects/windows.cfg /etc/nagios/objects/linux.cfg

# vim /etc/nagios/objects/linux.cfg

define host{

use linux-server; Inherit default values from a template

host_namelinuxhost; The name we're giving to this host

alias My Linux Server; A longer name associated with the host

address 10.1.1.1; IP address of the host

}

define service{

use generic-service

host_name linuxhost

service_descriptionUsers

check_command check_nrpe!check_users

}

define service{

use generic-service

host_name linuxhost

service_descriptionLoad

check_command check_nrpe!check_load

}

define service{

use generic-service

host_name linuxhost

service_descriptionSDA1

check_command check_nrpe!check_sda1

}

define service{

use generic-service

host_name linuxhost

service_descriptionSDA2

check_command check_nrpe!check_sda2

}

define service{

use generic-service

host_name linuxhost

service_descriptionSDA3

check_command check_nrpe!check_sda3

}

define service{

use generic-service

host_name linuxhost

service_descriptionZombie procs

check_command check_nrpe!check_zombie_procs

}

define service{

use generic-service

host_name linuxhost

service_descriptiontotal procs

check_command check_nrpe!check_total_procs

}

check_nrpe!check_total_procs

!后面為被監(jiān)控端定義好的命令名稱(chēng)

3)啟用主機(jī)配置文件

# vim /etc/nagios/nagios.cfg

cfg_file=/etc/nagios/objects/linux.cfg

4)檢測(cè)配置文件語(yǔ)法，并重啟nagios服務(wù)

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

# service nagios restart

在10.1.1.1上分別安裝web及mysql服務(wù)，配置監(jiān)控端10.1.1.2監(jiān)控這兩個(gè)服務(wù)

1、在10.1.1.1上安裝web及mysql

# yum install -y httpd mysql-server

需要在mysql服務(wù)器上創(chuàng)建允許遠(yuǎn)程登錄的用戶(hù)

2、編輯command.cfg分別定義監(jiān)控web及mysql服務(wù)的命令

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

define command{

command_name check_http

command_line $USER1$/check_http -I $HOSTADDRESS$ $ARG1$

}

define command{

command_name check_mysql

command_line $USER1$/check_mysql -H $HOSTADDRESS$ -u $ARG1$ -p $ARG2$

}

3、編輯linux.cfg配置文件，定義web及mysql服務(wù)

# vim /etc/nagios/objects/linux.cfg

define service{

use generic-service

host_name linuxhost

service_description Web Server

check_command check_http

}

define service{

use generic-service

host_name linuxhost

service_description Mysql Server

check_command check_mysql!admin!redhat

}

4、檢測(cè)配置文件語(yǔ)法，并重啟nagios服務(wù)

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

# service nagios restart

標(biāo)題名稱(chēng)：Nagios監(jiān)控工具
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