nagios监控软件的安装部署-白红宇

nagios监控软件的安装部署

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发布时间：2019-06-18

本文共 6545 字，大约阅读时间需要 21 分钟。

1.平台及所用组件,

监控服务器:RHEL4(192.168.1.211)+nagios-3.2.0+ nagios-plugins-1.4.14+ nrpe-2.12

被监控端RHEL4 (192.168.1.212)+ nagios-plugins-1.4.14+ nrpe_2.12

内容简介

本文档介绍nagios监控linux服务器, 因为监控都是依靠插件去完成的，而监控linux主要使用NRPE插件,本文首先简单介绍一下NRPE监控基础,及监控过程,然后一步步的配置一个实例实现监控linux服务器

1.NRPE监控插件基础

NRPE总共由两部分组成:

check_nrpe插件,运行在监控主机上。

NRPE daemon,运行在远程的linux主机上(通常就是被监控机)

整个的监控过程:(如下图)

当Nagios需要监控某个远程linux主机的服务或者资源情况时：

1).nagios运行check_nrpe插件,我们要在nagios配置文件中告诉它要检查什么.

2).check_nrpe插件会通过SSL连接到远程的NRPE daemon.

3).NRPE daemon会运行相应的nagios插件来执行检查本地资源或服务.

4).NRPE daemon将检查的结果返回给check_nrpe插件,插件将其递交给nagios做处理.

注意:NRPE daemon需要nagios插件安装在远程被监控linux主机上,否则,daemon不能做任何的监控. 别外因为它们间的通信是加密的SSL,所以在编译安装时都要加上选项, ./configure --enable-ssl --with-ssl-lib=/lib/,否则也会出错.

一.配置监控端

1.1 安装nagios

useradd -r nagios -s /sbin/nologin

./configure --prefix=/usr/local/nagios-4.0.8

make all

make install

make install-init

make install-config

make install-commandmode

(make install-webconf #可以自动配置httpd.conf)

cp sample-config/httpd.conf /usr/local/apache/conf/extra/nagios.conf

/usr/local/apache/bin/htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

(nagiosadmin 要与 /usr/local/nagios/etc/objects/contacts.cfg 里的 contact_name 相同)

chkconfig --add nagios

chkconfig --levels 345 nagios on

chown -R nagios.nagios nagios-4.0.8

ln -s nagios-4.0.8 nagios

1.2 安装nagios-plugins

cd nagios-plugins-1.4.12

./configure --prefix=/usr/local/nagios-4.0.8 --with-nagios-user=nagios --with-nagios-group=nagios --enable-redhat-pthread-workaround

make

make install

1.3 安装NRPE

cd nagios-nrpe_2.12

./configure #默认自动添加了openssl

./configure --prefix=/usr/local/nagios-4.0.8 --enable-ssl --with-ssl-lib=/lib/

make all

make install-plugin

make install-daemon

make install-daemon-config

1.4 commands.cfg定义外部构件nrpe

vi /usr/local/nagios/etc/objects/commands.cfg

#添加

#check nrpe

define command{

command_name check_nrpe

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

}

1.5.配置要监控的linux主机

vi /usr/local/nagios/etc/nagios.cfg

#中间添加

cfg_file=/usr/local/nagios/etc/objects/mylinux.cfg

vi /usr/local/nagios/etc/objects/mylinux.cfg

define host{

use linux-server

host_name mylinux

alias mylinux

# 客户端IP

address 192.168.1.212

}

define service{

use generic-service

host_name mylinux

service_description check-swap

check_command check_nrpe!check_swap

}

define service{

use generic-service

host_name mylinux

service_description check-load

check_command check_nrpe!check_load

}

define service{

use generic-service

host_name mylinux

service_description check-disk

check_command check_nrpe!check_hda1 }

define service{

use generic-service

host_name mylinux

service_description check-users

check_command check_nrpe!check_users

}

define service{

use generic-service

host_name mylinux

service_description otal_procs

check_command check_nrpe!check_total_procs

}

1.6.其它设置

chkconfig --add nagios #配置机器启动时自动启动Nagios

chkconfig nagios on

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg #检查Nagios配置文件

vi /etc/selinux/config #关闭SELinux

SELINUX=disabled

service iptables stop #关闭SELinux,或打开80,5666端口

service nagios start

二. 配置WEB服务:

2.1 安装httpd和php

yum install httpd php -y

2.2配置nagios的web服务:

在/etc/httpd/http.d中建立nagios.conf文件:

[root@yucheng22 tmp]# cat nagios.conf

# SAMPLE CONFIG SNIPPETS FOR APACHE WEB SERVER

# This file contains examples of entries that need

# to be incorporated into your Apache web server

# configuration file. Customize the paths, etc. as

# needed to fit your system.

ScriptAlias /nagios/cgi-bin "/usr/local/nagios-4.0.8/sbin"

# SSLRequireSSL

Options ExecCGI

AllowOverride None

Order allow,deny

Allow from all

# Order deny,allow

# Deny from all

# Allow from 127.0.0.1

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios-4.0.8/etc/htpasswd.users

Require valid-user

</Directory>

Alias /nagios "/usr/local/nagios-4.0.8/share"

# SSLRequireSSL

Options None

AllowOverride None

Order allow,deny

Allow from all

# Order deny,allow

# Deny from all

# Allow from 127.0.0.1

AuthName "Nagios Access"

AuthType Basic

AuthUserFile /usr/local/nagios-4.0.8/etc/htpasswd.users

Require valid-user

</Directory>

在/etc/http/conf的http.conf中找到:

DirectoryIndex index.html index.html.var

修改为:

DirectoryIndex index.html index.html.var index.php

产生密码文件:

htpasswd -mb -c /usr/local/nagios-4.0.8/etc/htpasswd.users1 nagios nagios

三. 配置被监控端

3.1.安装nagios-plugin

useradd nagios -r -s /sbin/nologin

tar -zxvf nagios-plugins-2.0.3.tar.gz

cd nagios-plugins-2.0.3

./configure --prefix=/usr/local/nagios-plugins-2.0.3 --with-nagios-user=nagios --with-nagios-group=nagios --enable-redhat-pthread-workaround

make

make install

ln -s nagios-plugins-2.0.3 nagios-plugins

3.2 改变主目录权限

chown -R nagios:nagios /usr/local/nagios-plugins

[root@client nagios]# ll

drwxr-xr-x 2 nagios nagios 4096 Jun 1 00:07 libexec

drwxr-xr-x 3 nagios nagios 4096 Jun 1 00:07 share

3.3安装客户端的nrpe

tar -zxvf nrpe_2.12.tar.gz

cd nrpe_2.12

./configure --prefix=/usr/local/nagios-plugins-2.0.3 --enable-ssl --with-ssl-lib

make all

make install-plugin

make install-daemon

make install-daemon-config

3.4.配置nrpe信息

vi /usr/local/nagios-plugins/etc/nrpe.cfg

allowed_hosts=127.0.0.1,192.168.1.211

3.5.启动nrpe

/usr/local/nagios-plugins/bin/nrpe -c /usr/local/nagios-plugins/etc/nrpe.cfg -d

#或

vi /etc/rc.d/rc.local

/usr/local/nagios-plugins/bin/nrpe -c /usr/local/nagios-plugins/etc/nrpe.cfg -d

3.6.验证nrpe

netstat -an | grep 5666

tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN

/usr/local/nagios-plugins/libexec/check_nrpe -H 127.0.0.1

NRPE v2.8.12

#服务端测试

/usr/local/nagios-plugins/libexec/check_nrpe -H l92.168.1.212 -p 5666 -c check_load

NRPE v2.8.12

3.7.配置监控对像(关键)

由监控原理可知被监控端做监控然后传给监控服务器绘总,设置监控详细参数主要是设置被监控端的nrpe.cfg文件

可以看到里面监控对象

vi /usr/local/nagios-plugins/etc/nrpe.cfg

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

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

command[check_hda1]=/usr/local/nagios/libexec-plugins/check_disk -w 20 -c 10 -p /dev/hda1

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

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

command[check_swap]=/usr/local/nagios-plugins/libexec/check_swap -w 20% -c 10%

3.8.常用启动命令:

监控端进程启动方式:

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

service ngios start

被监控端进程启动方式:

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

转载于:https://blog.51cto.com/webseven/1653105

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