为Node.js程序配置使用Nginx服务器的简明教程

Node.js是一个基于Chrome JavaScript运行时建立的平台， 用于方便地搭建响应速度快、易于扩展的网络应用。Node.js 使用事件驱动， 非阻塞I/O 模型而得以轻量和高效，非常适合在分布式设备上运行的数据密集型的实时应用，如实时聊天等等。然而对于gzip编码，静态文件，HTTP缓存，SSL处理，负载平衡和反向代理等，都可以通过nginx来完成，从而减小node.js的负载，并通过nginx强大的缓存来节省网站的流量从而提高网站的加载速度。
流程图

nginx配置如下：

 http {
  proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=one:8m max_size=3000m inactive=600m;
  proxy_temp_path /var/tmp;
  include    mime.types;
  default_type application/octet-stream;
  sendfile    on;
  keepalive_timeout 65;
 
  gzip on;
  gzip_comp_level 6;
  gzip_vary on;
  gzip_min_length 1000;
  gzip_proxied any;
  gzip_types text/plain text/html text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
  gzip_buffers 16 8k;
 
  ssl_certificate /some/location/sillyfacesociety.com.bundle.crt;
  ssl_certificate_key /some/location/sillyfacesociety.com.key;
  ssl_protocols    SSLv3 TLSv1;
  ssl_ciphers HIGH:!aNULL:!MD5;
 
  upstream silly_face_society_upstream {
   server 127.0.0.1:61337;
   server 127.0.0.1:61338;
   keepalive 64;
  }
 
  server {
   listen 80;
   listen 443 ssl;
 
   server_name sillyfacesociety.com;
   return 301 $scheme://www.sillyfacesociety.com$request_uri;
  }
 
  server {
    listen 80;
    listen 443 ssl;
 
    server_name www.sillyfacesociety.com;
 
    error_page 502 /errors/502.html;
 
    location ~ ^/(images/|img/|javascript/|js/|css/|stylesheets/|flash/|media/|static/|robots.txt|humans.txt|favicon.ico) {
     root /usr/local/silly_face_society/node/public;
     access_log off;
     expires max;
    }
 
    location /errors {
     internal;
     alias /usr/local/silly_face_society/node/public/errors;
    }
 
    location / {
     proxy_redirect off;
     proxy_set_header  X-Real-IP      $remote_addr;
     proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header  X-Forwarded-Proto $scheme;
     proxy_set_header  Host          $http_host;
     proxy_set_header  X-NginX-Proxy  true;
     proxy_set_header  Connection "";
     proxy_http_version 1.1;
     proxy_cache one;
     proxy_cache_key sfs$request_uri$scheme;
     proxy_pass     http://silly_face_society_upstream;
    }
  }
}

配置段说明

http {
  ...
  upstream silly_face_society_upstream {
   server 127.0.0.1:61337;
   server 127.0.0.1:61338;
   keepalive 64;
  }
  ...
}

nginx负载均衡多个nodo.js实例。keepalive 64 指示nginx在任何时候保持最少64个HTTP/ 1.1连接到代理服务器。如果有更多的流量nginx将打开更多的连接。