CentOS 7下Nagios的安装及配置
简介
Nagios 是一款自动化运维工具，可以协助运维人员监控服务器的运行状况，并且拥有报警功能。本文章将介绍其安装方法和详细的配置方法。
nagios 监控服务应用指南
本地资源：负载，CPU，磁盘，内存。IO，RAID，温度，passwd文件变化，本地所有文件指纹识别
网络服务：端口，URL，丢包，进程，网络流量
其他设备：交换机，打印机，windows等。
业务数据：用户登录失败次数，用户登录网站次数，输入验证码失败的次数，某个API接口流量并发，电商网站订单，支付交易的数量
nagios成员：主程序nagios，插件nagios-plugins，和一些可选的客户端nrpe，NSClient++,NSCA和NDOUtils
NRPE--半被动模式
存放位置：安装在客户端
NRPE作用：在客户端执行相关的脚本插件来获取数据，实现对客户端主机资源的监控。
存在形式：守护进程(agent)模式，开启的端口5666NSClient++：半被动模式，相当于linux系统的nrpe
NDOUtils（不推荐用）
存在位置：服务端
作用：用于将nagios的配置信息和各event产生的数据存入数据库中，以实现对这些数据的检索和处理。NSCA：纯被动模式--->用在分布式监控环境中
位置：NSCA需要同时安装在nagios的服务器端和客户端
软件版本
nagios版本：4.3.1
nagios-plugins版本：2.2.1
nrpe版本：3.1.0
实现环境
CentOS版本：CentOS Linux release 7.3.1611 (Core) 64位
Apache版本：Apache/2.4.6
Nginx版本: nginx 1.12.0
Mysql版本：mysql 5.7.18
PHP版本：php 7.1.4
下载nagios软件及插件包
[root@nagios ~]# cd /software/ [root@nagios software]# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.1.tar.gz [root@nagios software]# wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz [root@nagios software]# wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz [root@nagios software]# ll -rw-r--r-- 1 root root 11095797 4月 21 15:57 nagios-4.3.1.tar.gz -rw-r--r-- 1 root root 2728818 4月 20 00:04 nagios-plugins-2.2.1.tar.gz -rw-r--r-- 1 root root 501028 4月 17 22:36 nrpe-3.1.0.tar.gz
安装nagios-server服务端
安装依赖包
[root@nagios software]# yum -y install httpd httpd-devel gcc glibc glibc-common gd gd-devel perl-devel perl-CPAN fcgi perl-FCGI perl-FCGI-ProcManager
解压nagios源码包
[root@nagios software]# tar zxvf nagios-4.3.1.tar.gz
进入解压后的目录
[root@nagios software]# cd nagios-4.3.1/
创建ngaios用户和组（把nginx启动用户www加入到nagios相关组）
[root@nagios nagios-4.3.1]# useradd nagios -s /sbin/nologin [root@nagios nagios-4.3.1]# id www [root@nagios nagios-4.3.1]# groupadd nagcmd [root@nagios nagios-4.3.1]# usermod -a -G nagcmd nagios [root@nagios nagios-4.3.1]# usermod -a -G nagcmd www [root@nagios nagios-4.3.1]# id -n -G nagios [root@nagios nagios-4.3.1]# id -n -G www
配置nagios
[root@client1 nagios-4.3.1]# ./configure --with-command-group=nagcmd
编译和安装
[root@nagios nagios-4.3.1]# make all [root@nagios nagios-4.3.1]# make install-init [root@nagios nagios-4.3.1]# make install-commandmode [root@nagios nagios-4.3.1]# make install-config [root@nagios nagios-4.3.1]# make install [root@nagios nagios-4.3.1]# cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/ [root@nagios nagios-4.3.1]# chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers [root@nagios nagios-4.3.1]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
生成apache配置文件
[root@nagios nagios-4.3.1]# make install-webconf
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
if [ 0 -eq 1 ]; then \
ln -s /etc/httpd/conf.d/nagios.conf /etc/apache2/sites-enabled/nagios.conf; \
fi
*** Nagios/Apache conf file installed ***生成nagios web界面的验证信息
[root@nagios nagios-4.3.1]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagios New password: ==> 输入密码，这里我输入的密码是nagios，记住这个密码 Re-type new password: ==> 确认密码 Adding password for user nagios
修改apache配置文件
vi /etc/httpd/conf/httpd.conf
Listen 80 ===> 修改为 Listen 8080 User apache ===> 修改为 User www Group apache ===> 修改为 Group www DirectoryIndex index.html ===> 修改为 DirectoryIndex index.php index.html AddType application/x-gzip .gz .tgz ===> 下面添加一行内容 AddHandler application/x-httpd-php .php # LoadModule foo_module modules/mod_foo.so ===> 下面添加一行内容 LoadModule php7_module modules/libphp7.so
apache配置文件参考
[root@nagios httpd]# grep -v '^$' /etc/httpd/conf/httpd.conf|grep -v '#'
ServerRoot "/etc/httpd"
Listen 8080
LoadModule php7_module modules/libphp7.so
Include conf.modules.d/*.conf
User www
Group www
ServerAdmin root@localhost
<Directory />
AllowOverride none
Require all denied
</Directory>
DocumentRoot "/var/www/html"
<Directory "/var/www">
AllowOverride None
Require all granted
</Directory>
<Directory "/var/www/html">
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
<IfModule dir_module>
DirectoryIndex index.php index.html
</IfModule>
<Files ".ht*">
Require all denied
</Files>
ErrorLog "logs/error_log"
LogLevel warn
<IfModule log_config_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
<IfModule logio_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio
</IfModule>
CustomLog "logs/access_log" combined
</IfModule>
<IfModule alias_module>
ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"
</IfModule>
<Directory "/var/www/cgi-bin">
AllowOverride None
Options None
Require all granted
</Directory>
<IfModule mime_module>
TypesConfig /etc/mime.types
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz
AddHandler application/x-httpd-php .php
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
</IfModule>
AddDefaultCharset UTF-8
<IfModule mime_magic_module>
MIMEMagicFile conf/magic
</IfModule>
EnableSendfile on
IncludeOptional conf.d/*.conf重新编译一下php，使其直接apache（也就是编译参数加上--with-apxs2）
[root@nagios nagios-4.3.1]# cd /software/php-7.1.4/ [root@nagios php-7.1.4]# ./configure --prefix=/usr/local/php --enable-fpm --with-fpm-user=nginx --with-fpm-group=nginx --with-mysqli --with-zlib --with-curl --with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir --with-openssl --enable-mbstring --enable-xml --enable-session --enable-ftp --enable-pdo -enable-tokenizer --enable-zip --with-apxs2 [root@nagios php-7.1.4]# make && make install [root@nagios php-7.1.4]# cd /etc/httpd/ [root@nagios httpd]# ll /etc/httpd/modules/libphp7.so -rwxr-xr-x 1 root root 38908880 4月 24 10:34 /etc/httpd/modules/libphp7.so ===> 可以看到这个模块已经生成
启动apache
[root@nagios httpd]# systemctl start httpd [root@nagios httpd]# systemctl enable httpd
启动nagios
chkconfig nagios on /etc/init.d/nagios start
在浏览器输入ip:8080/nagios测试nagios-web页面是否可以打开
安装nagios-plugins插件
解压nagios-plugins源码包
[root@nagios httpd]# cd /software/ [root@nagios software]# tar zxvf nagios-plugins-2.2.1.tar.gz
进入解压后的目录进行配置
[root@nagios software]# cd nagios-plugins-2.2.1/ [root@nagios nagios-plugins-2.2.1]# ./configure --with-nagios-user=nagios --with-nagios-group=nagcmd --enable-perl-modules
编译及安装
[root@nagios nagios-plugins-2.2.1]# make && make install
安装nrpe
解压nrpe源码包
[root@nagios nagios-plugins-2.2.1]# cd /software/ [root@nagios software]# tar zxvf nrpe-3.1.0.tar.gz
进去解压后的目录进行配置
[root@nagios software]# cd nrpe-3.1.0/ [root@nagios nrpe-3.1.0]# ./configure
编译及安装
[root@nagios nrpe-3.1.0]# make all [root@nagios nrpe-3.1.0]# make install-plugin [root@nagios nrpe-3.1.0]# make install-daemon [root@nagios nrpe-3.1.0]# make install-daemon-config [root@nagios nrpe-3.1.0]# cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg
安装完成后，查看下libexec下面是否有插件
[root@nagios nrpe-3.1.0]# ls /usr/local/nagios/libexec/ check_apt check_flexlm check_log check_ntp_peer check_smtp disable_active_service_checks check_breeze check_fping check_mailq check_ntp_time check_spop disable_notifications check_by_ssh check_ftp check_mrtg check_nwstat check_ssh distributed-monitoring check_clamd check_http check_mrtgtraf check_Oracle check_ssmtp enable_active_service_checks check_cluster check_icmp check_mysql check_overcr check_swap enable_notifications check_dhcp check_ide_smart check_mysql_query check_ping check_tcp eventhandlers check_dig check_ifoperstatus check_nagios check_pop check_time negate check_disk check_ifstatus check_nntp check_procs check_udp redundancy-scenario1 check_disk_smb check_imap check_nntps check_real check_ups submit_check_result check_dns check_ircd check_nrpe check_rpc check_uptime urlize check_dummy check_jabber check_nt check_sensors check_users utils.pm check_file_age check_load check_ntp check_simap check_wave utils.sh
启动nrpe，并测试服务端本地是否可以连通
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