Nagios监控web服务

首先需要一台安装有web服务的服务器、我这用juny-18这台装有Nginx的服务器来做实验的被监控端，juny-10来做监控机、Nginx也是一个web服务，监听在80端口

先测试连接

[root@juny-10 ~]# cd /usr/local/nagios/libexec/

[root@juny-10 libexec]# ./check_tcp -H 192.168.1.18 -p 80

TCP OK - 0.083 second response time on 192.168.1.18 port 80|time=0.082770s;;;0.000000;10.000000

[root@juny-10 libexec]#

看到此回复说明连接没有问题、接下来修改配置远程主机

配置远程主机

如过没有这个远程主机自己写一个、如果有或者配置过就可以不用配置

[root@juny-10 nagios]# vim etc/objects/hosts.cfg

define host{

use linux-server

host_name juny-18

address 192.168.1.18

}

配置好远程主机、接下来配置远程服务

配置远程服务

[root@juny-10 nagios]# vim etc/objects/service.cfg

define service{

use local-service

host_name juny-18

service_description Nginx

check_command check_nginx

}

保存退出

写服务命令

在配置命令的最后面增加一条服务命令

[root@juny-10 nagios]# vim etc/objects/commands.cfg

define command{

command_name check_nginx

command_line $USER1$/check_tcp -H $HOSTADDRESS$ -p 80

}

保存并退出

测试配置文件

[root@juny-10 nagios]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Nagios Core 3.5.1

Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors

Copyright (c) 1999-2009 Ethan Galstad

Last Modified: 08-30-2013

License: GPL

Website: http://www.nagios.org

Reading configuration data...

Read main config file okay...

Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/hosts.cfg'...

Processing object config file '/usr/local/nagios/etc/objects/service.cfg'...

Read object config files okay...

Total Warnings: 0

Total Errors: 0

Things look okay - No serious problems were detected during the pre-flight check

测试配置没问题

重启nagios服务

[root@juny-10 nagios]# /etc/init.d/nagios restart

Restarting nagios (via systemctl): [ 确定 ]

[root@juny-10 nagios]#

网页测试

查看网页是不是增加Nginx服务的的监控

可以看到成功发添加Nginx服务，并成功的监控到

到此Nginx的监控配置结束

Nagios监控远程主机的私有信息

什么是私有信息：需要我们本机登录操作的；例如监控：硬盘、线程、分区、swap分区等等信息

安装插件

Nrpe简介：

NRPE是监控软件nagios的一个扩展，它被用于被监控的服务器上，向nagios监控平台提供该服务器的一些本地的情况。例如，cpu负载、内存使用、硬盘使用等等。NRPE可以称为nagios的for linux 客户端。

客户端安装nrpe插件

安装依赖包

[root@juny-10 ~]# yum install openssl-devel -y

已加载插件：fastestmirror, langpacks

Loading mirror speeds from cached hostfile

* base: mirrors.aliyun.com

* epel: mirrors.ustc.edu.cn

* extras: mirrors.aliyun.com

* updates: mirrors.aliyun.com

软件包 1:openssl-devel-1.0.2k-8.el7.x86_64 已安装并且是最新版本

无须任何处理

安装nrpe

解压并到该目录下

[root@juny-10 Nagios]# tar zxf nrpe-2.15.tar.gz -C /usr/local/src/ ; cd /usr/local/src/nrpe-2.15

默认配置

[root@juny-10 nrpe-2.15]# ./configure

*** Configuration summary for nrpe 2.15 09-06-2013 ***:

General Options:

-------------------------

NRPE port: 5666

NRPE user: nagios

NRPE group: nagios

Nagios user: nagios

Nagios group: nagios

Review the options above for accuracy. If they look okay,

type 'make all' to compile the NRPE daemon and client.

看到上面的信息就开始编译并安装

[root@juny-10 nrpe-2.15]# make && make install

[root@juny-10 nrpe-2.15]# make && make install

cd ./src/; make ; cd ..

make[1]: 进入目录"/usr/local/src/nrpe-2.15/src"

gcc -g -O2 -I/usr/include/openssl -I/usr/include -DHAVE_CONFIG_H -I ../include -I ./../include -o nrpe ./nrpe.c ./utils.c ./acl.c -L/usr/lib64 -lssl -lcrypto -lnsl

gcc -g -O2 -I/usr/include/openssl -I/usr/include -DHAVE_CONFIG_H -I ../include -I ./../include -o check_nrpe ./check_nrpe.c ./utils.c -L/usr/lib64 -lssl -lcrypto -lnsl

make[1]: 离开目录"/usr/local/src/nrpe-2.15/src"

*** Compile finished ***

If the NRPE daemon and client compiled without any errors, you

can continue with the installation or upgrade process.

Read the PDF documentation (NRPE.pdf) for information on the next

steps you should take to complete the installation or upgrade.

cd ./src/ && make install

make[1]: 进入目录"/usr/local/src/nrpe-2.15/src"

make install-plugin

make[2]: 进入目录"/usr/local/src/nrpe-2.15/src"

/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/libexec

/usr/bin/install -c -m 775 -o nagios -g nagios check_nrpe /usr/local/nagios/libexec

make[2]: 离开目录"/usr/local/src/nrpe-2.15/src"

make install-daemon

make[2]: 进入目录"/usr/local/src/nrpe-2.15/src"

/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/bin

/usr/bin/install -c -m 775 -o nagios -g nagios nrpe /usr/local/nagios/bin

make[2]: 离开目录"/usr/local/src/nrpe-2.15/src"

make[1]: 离开目录"/usr/local/src/nrpe-2.15/src"

[root@juny-10 nrpe-2.15]#

安装完成以后在nagios的libesec文件夹下面就会有框出来的文件

[root@juny-10 nrpe-2.15]# ls /usr/local/nagios/libexec/

被监控端安装nrpe插件

安装依赖

[root@juny-18 ~]# yum install openssl-devel -y

已安装:

openssl-devel.x86_64 1:1.0.2k-8.el7

作为依赖被安装:

keyutils-libs-devel.x86_64 0:1.5.8-3.el7

krb5-devel.x86_64 0:1.15.1-8.el7

libcom_err-devel.x86_64 0:1.42.9-10.el7

libkadm5.x86_64 0:1.15.1-8.el7

libselinux-devel.x86_64 0:2.5-11.el7

libsepol-devel.x86_64 0:2.5-6.el7

libverto-devel.x86_64 0:0.2.5-4.el7

pcre-devel.x86_64 0:8.32-17.el7

zlib-devel.x86_64 0:1.2.7-17.el7

作为依赖被升级:

krb5-libs.x86_64 0:1.15.1-8.el7

完毕！

安装nagios

先上传nagios

第一步创建不需要登录nagios用户，

[root@juny-18 ~]# useradd -s /sbin/nologin nagios

创建组

[root@juny-18 ~]# groupadd nagcmd

把用户添加到组里面

[root@juny-18 ~]# usermod -G nagcmd nagios

安装xinetd工具

[root@juny-18 ~]# yum install xinetd -y

正在安装:

xinetd x86_64 2:2.3.15-13.el7 base 128 k

事务概要

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

安装 1 软件包

总下载量：128 k

安装大小：261 k

Downloading packages:

xinetd-2.3.15-13.el7.x86_64.rpm | 128 kB 00:16

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

正在安装 : 2:xinetd-2.3.15-13.el7.x86_64 1/1

验证中 : 2:xinetd-2.3.15-13.el7.x86_64 1/1

已安装:

xinetd.x86_64 2:2.3.15-13.el7

完毕！

开始安装nagios

解压并进如该目录

[root@juny-18 ~]# tar zxf nagios-plugins-2.1.1.tar.gz -C /usr/local/src/ ; cd /usr/local/src/nagios-plugins-2.1.1

开始默认配置

[root@juny-18 nagios-plugins-2.1.1]# ./configure

config.status: creating po/Makefile

--with-apt-get-command:

--with-ping6-command: /usr/sbin/ping6 -n -U -w %d -c %d %s

--with-ping-command: /usr/bin/ping -n -U -w %d -c %d %s

--with-ipv6: yes

--with-mysql: no

--with-openssl: yes

--with-gnutls: no

--enable-extra-opts: yes

--with-perl: /usr/bin/perl

--enable-perl-modules: no

--with-cgiurl: /nagios/cgi-bin

--with-trusted-path: /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

--enable-libtap: no

[root@juny-18 nagios-plugins-2.1.1]#

开始编译并安装

[root@juny-18 nagios-plugins-2.1.1]# make && make install

make[1]: 离开目录"/usr/local/src/nagios-plugins-2.1.1/po"

make[1]: 进入目录"/usr/local/src/nagios-plugins-2.1.1"

make[2]: 进入目录"/usr/local/src/nagios-plugins-2.1.1"

make[2]: 对"install-exec-am"无需做任何事。

make[2]: 对"install-data-am"无需做任何事。

make[2]: 离开目录"/usr/local/src/nagios-plugins-2.1.1"

make[1]: 离开目录"/usr/local/src/nagios-plugins-2.1.1"

看到上面这些信息就表示编译和安装结束

安装nrpe

解压并进入到该目录

[root@juny-18 ~]# tar zxf nrpe-2.15.tar.gz -C /usr/local/src/ ; cd /usr/local/src/nrpe-2.15

然后进行配置、编译和编译安装、这里一步执行完

[root@juny-18 nrpe-2.15]# ./configure && make && make install

make[1]: 进入目录"/usr/local/src/nrpe-2.15/src"

make install-plugin

make[2]: 进入目录"/usr/local/src/nrpe-2.15/src"

/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/libexec

/usr/bin/install -c -m 775 -o nagios -g nagios check_nrpe /usr/local/nagios/libexec

make[2]: 离开目录"/usr/local/src/nrpe-2.15/src"

make install-daemon

make[2]: 进入目录"/usr/local/src/nrpe-2.15/src"

/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/bin

/usr/bin/install -c -m 775 -o nagios -g nagios nrpe /usr/local/nagios/bin

make[2]: 离开目录"/usr/local/src/nrpe-2.15/src"

make[1]: 离开目录"/usr/local/src/nrpe-2.15/src"

安装nrpe配置文件

[root@juny-18 nrpe-2.15]# make install-daemon-config

/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc

/usr/bin/install -c -m 644 -o nagios -g nagios sample-config/nrpe.cfg /usr/local/nagios/etc

安装完成

安装和本地服务关联的服务

[root@juny-18 nrpe-2.15]# make install-xinetd

/usr/bin/install -c -m 644 sample-config/nrpe.xinetd /etc/xinetd.d/nrpe

[root@juny-18 nrpe-2.15]#

编辑允许nagios服务通信

[root@juny-18 nrpe-2.15]# vim /etc/xinetd.d/nrpe

增加nagios的ip

在/etc/添加nrpe服务

[root@juny-18 nrpe-2.15]# vim /etc/services

启动xinetd

[root@juny-18 nrpe-2.15]# systemctl start xinetd

添加到开机启动

[root@juny-18 nrpe-2.15]# systemctl enable xinetd

查看是否在监听

[root@juny-18 nrpe-2.15]# netstat -anput

配置监控命令

[root@juny-18 ~]# vim /usr/local/nagios/etc/nrpe.cfg

本身就监控了很多的私有服务、我框出来的是新添加的监控内容

重启xinetd服务

[root@juny-18 ~]# systemctl restart xinetd

回到监控主机

测试是不是能连接到被监控主机上的私有信息

[root@juny-10 ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.1.18 -c check_sda1

DISK OK - free space: /boot 844 MB (83% inode=99%);| /boot=169MB;628;659;0;1014

[root@juny-10 ~]#

定义被监控的主机

[root@juny-10 ~]# vim /usr/local/nagios/etc/objects/hosts.cfg

define host{

use linux-server

host_name juny-18

address 192.168.1.18

}

编辑添加服务

[root@juny-10 ~]# vim /usr/local/nagios/etc/objects/service.cfg

define service{

use local-service

host_name juny-18

service_description sda2_Partition

check_command check_nrpe!check_sda2

}

define service{

use local-service

host_name juny-18

service_description Total Processes

check_command check_nrpe!check_total_procs

}

define service{

use local-service

host_name juny-18

service_description Current Load

check_command check_nrpe!check_load

}

#分别是监测分区、进程总数、负载

注意：这还可以写很多的监控服务、我在做实验的时候只写三项

编辑命令

[root@juny-10 ~]# vim /usr/local/nagios/etc/objects/commands.cfg

define command{

command_name check_nrpe

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

}

重启nagios

[root@juny-10 ~]# /etc/init.d/nagios restart

Restarting nagios (via systemctl): [ 确定 ]

[root@juny-10 ~]#

网页测试

可以看到刚刚配置的都进入到监控里面，等待被监控

过了一会所有的信息都被接收到了

下一节做邮件报警和window监控的实验