Nagios 監控你的所有服務狀態 - Nginx 安裝 Nagios 4.1.1

之前有寫過一篇 Nagios 的安裝文，這次要在安裝一次 Nagios 的時候因為環境不同，所以寫了一篇新的 Nagios 安裝文紀錄

 

這篇將採用 CentOS 6.7，並且以 Nginx 當 WebServer，Nagios 則以編譯的方式進行安裝

 

前置準備環境；

1. CentOS 6.x


2. Nginx 1.8.x


3. PHP-FPM 5.x

建立需求：

1. 訪問根目錄 /，預設 nagios 的訪問目錄為 /nagios

 

 

安裝 Nagios by Nginx

Step.1 準備編譯環境

$ yum install gcc cpp make -y

 

Step.2 安裝 Nagios core

$ adduser -M nagios 
 $ wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.1.1.tar.gz 
 $ tar zxvf nagios-4.1.1.tar.gz 
 $ cd nagios-4.1.1 
 $ ./configure --prefix=/usr/local/nagios 
 $ make install 
 $ make install-init 
 $ make install-commandmode 
 $ make install-config 
  
 # nagios core: 
 $ ls /usr/local/nagios/ 
 bin  etc  libexec  sbin  share  var 
  
 # nagios example config: 
 $ ls -R /usr/local/nagios/etc/ 
 .: 
 cgi.cfg  nagios.cfg  objects  resource.cfg 
  
 ./objects: 
 commands.cfg  localhost.cfg  switch.cfg     timeperiods.cfg 
 contacts.cfg  printer.cfg    templates.cfg  windows.cfg

建立 nagios 使用者、install-init 安裝服務設定、install-commandmode 安裝命令模式、install-config 安裝範例設定檔

 

 

Step.3 安裝 Nagios plugin

$ wget http://www.nagios-plugins.org/download/nagios-plugins-2.1.1.tar.gz 
 $ tar zxvf nagios-plugins-2.1.1.tar.gz 
 $ cd nagios-plugins-2.1.1 
 $ ./configure --prefix=/usr/local/nagios 
 $ make && make install 
  
 $ ls /usr/local/nagios/libexec 
  
 check_http 
 check_ssh 
 .. 
 ..

 

Step.4 建立使用者驗證

為了讓 Nagios 有更好的安全性，可以使用 htpasswd 來建立驗證檔案，並且讓 Nginx 引入

$ htpasswd -c /usr/local/nagios/htpasswd.users scott 
  
 #開啟驗證，允許scott使用者權限。 
 $ vim /usr/local/nagios/cgi.cfg 
 use_authentication=1 
 authorized_for_system_information=nagiosadmin,scott 
 authorized_for_configuration_information=nagiosadmin,scott 
 authorized_for_system_commands=nagiosadmin,scott 
 authorized_for_all_services=nagiosadmin,scott 
 authorized_for_all_hosts=nagiosadmin,scott 
 authorized_for_all_service_commands=nagiosadmin,scott 
 authorized_for_all_host_commands=nagiosadmin,scott

 

Step.5 準備 nagios 的站點目錄

所需要的站點內容預設都放在 /usr/local/nagios/ 底下，因為習慣問題，所以我都把他遷移到 /usr/share/nginx/html/nagios 底下

$ rsync -av /usr/local/nagios/share/ /usr/share/nginx/html/nagios/ 
 $ rsync -av /usr/local/nagios/sbin /usr/share/nginx/html/nagios/cgi-bin/

• share 是 nagios php 的內容


• sbin 是 nagios cgi 的內容

 

Step.6 設定 nagios 的根目錄 & 權限，參考step5

$ vim /usr/local/nagios/etc/cgi.cfg 
  
 physical_html_path=/usr/share/nginx/html/nagios 
 url_html_path=/

 

Step.7 設定 cgi 的起始目錄，參考step5

$ vim /usr/share/nginx/html/nagios/config.inc.php 
  
 $cfg['cgi_base_url']='/cgi-bin';

 

Step.8 安裝 Nginx 設定檔 with spawn-fcgi

在設定 Nginx 前，必須先安裝好 Nginx 和 php-fpm，由於 nagios 有 .cgi 檔案必須執行，所以必須另外以 spawn-fcgi 來執行。

• 安裝 spawn-fcgi

$ yum install spawn-fcgi fcgi-devel fcgi git -y 
  
 $ cd /usr/local/src/  
 $ git clone git://github.com/gnosek/fcgiwrap.git 
 $ cd fcgiwrap 
 $ autoreconf -i 
 $ ./configure 
 $ make 
 $ make install 
  
 $ vim /etc/sysconfig/spawn-fcgi 
  
 FCGI_SOCKET=/var/run/fcgiwrap.socket 
 FCGI_PROGRAM=/usr/local/sbin/fcgiwrap 
 FCGI_USER=nginx 
 FCGI_GROUP=nginx 
 FCGI_EXTRA_OPTIONS="-M 0700" 
 OPTIONS="-u $FCGI_USER -g $FCGI_GROUP -s $FCGI_SOCKET -S $FCGI_EXTRA_OPTIONS -F 1 -P /var/run/spawn-fcgi2.pid -- $FCGI_PROGRAM" 
  
 $ service spawn-fcgi restart 
 $ chkconfig spawn-fcgi on

 

• Nginx 設定檔

$ vim /etc/nginx/conf.d/nagios.conf 
  
 server{ 
         listen       80; 
         server_name  nagios.com; 
         access_log /var/log/nginx/nagios_access.log; 
         error_log /var/log/nginx/nagios_error.log warn; 
  
         root /usr/share/nginx/html/nagios; 
         index index.php index.html; 
  
         location / { 
                 auth_basic "Private Website!!"; 
                 auth_basic_user_file /usr/local/nagios/etc/htpasswd.users; 
                 try_files $uri $uri/ /index.php; 
         } 
  
         location ~ \.php$ { 
                 root   /usr/share/nginx/html/nagios; 
                 fastcgi_pass   127.0.0.1:9000; 
                 fastcgi_index  index.php; 
                 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; 
                 include        fastcgi_params; 
         } 
  
         location ~ \.cgi$ { 
                 gzip    off; 
                 auth_basic "Private Website!!"; 
                 auth_basic_user_file /usr/local/nagios/etc/htpasswd.users; 
                 root    /usr/share/nginx/html/nagios/cgi-bin; 
                 rewrite ^/cgi-bin/(.*)\.cgi /$1.cgi break; 
                 fastcgi_pass  unix:/var/run/fcgiwrap.socket; 
                 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; 
                 fastcgi_index index.cgi; 
                 include fastcgi_params; 
         } 
 }

在 cgi 的處理，rewrite ^/cgi-bin/(.*)\.cgi /$1.cgi break; 這一段非常重要，他會進行 rewrite 才能執行，否則你看到的都會是 403  Forbidden

 

啟動 Nagios & Nginx

$ service nagios restart 
 $ service nginx restart 
  
 $ chkconfig nagios on 
 $ chkconfig nginx on

 

 

訪問 http://servername/，進行 htpasswd 使用者驗證之後就可以看到 nagios 的使用者介面



 

 

 

 

 

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