Nginx負載平衡簡易方法

做個簡單的測試，一個Nginx, 通過FastCGI協議和另外兩台伺服器上的基於CppCMS開發的web server通訊。配置方法很簡單：

首先，必須在nginx.conf檔案開頭，server 配置之前添加下面的upstream資訊：

upstream backend {    server 192.168.1.55:8080;    server 192.168.1.58:8080;}

然後在某個server配置裡面，包含了fastcgi的設定檔：

    include ./conf.d/fastcgi.test;

在這個fastcgi.test中，沿用CppCMS需要的fastcgi大多數配置, 除了將fastcgi_pass後面的IP:port 改成前面設定的backend.

location ~ ^/my_site_path.*$ {    fastcgi_pass backend;    fastcgi_split_path_info ^(/my_site)(.*)$;    fastcgi_param SCRIPT_FILENAME  $fastcgi_script_name;    fastcgi_param PATH_INFO        $fastcgi_path_info;    fastcgi_param  SCRIPT_NAME     /my_site;    fastcgi_param  QUERY_STRING    $query_string;    fastcgi_param  REQUEST_METHOD  $request_method;    fastcgi_param  CONTENT_TYPE    $content_type;    fastcgi_param  CONTENT_LENGTH  $content_length;    fastcgi_param  REQUEST_URI     $request_uri;    fastcgi_param  DOCUMENT_URI    $document_uri;    fastcgi_param  DOCUMENT_ROOT   $document_root;    fastcgi_param  SERVER_PROTOCOL $server_protocol;    fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;    fastcgi_param  SERVER_SOFTWARE    nginx;    fastcgi_param  REMOTE_ADDR        $remote_addr;    fastcgi_param  REMOTE_PORT        $remote_port;    fastcgi_param  SERVER_ADDR        $server_addr;    fastcgi_param  SERVER_PORT        $server_port;    fastcgi_param  SERVER_NAME        $server_name;}

現在測試一下，關閉一台web server，網頁依然能夠正常瀏覽。