Nginx, PostgreSQL And Trac : Trac多实例运行

 

参考文章:http://www.jrrzz.net/2010/01/10/multi-host-trac-using-nginx/

 

我觉得多实例运行的关键点在于对 fastcgi中的script_name和path_info的理解

script_name是脚本名称,我们可以理解成应用的一个入口

path_name是传给这个入口的一个参数,是一个路径

 

比如在php中

http://www.test.com/index.php/foo/bar.html?c=index&m=search

这里的/index.php为script_name

/foo/bar.html为path_info

再后面的就为query_string鸟

 

在我们这里如果我们想这样运行多实例

http://xxx.com/trac/instance1/wiki

http://xxx.com/trac/instance2/wiki

就是使用这样的方式在运行instance1和instance2这两个trac的项目实例

那么我们就得设置/trac/instancex(x为可变的部分)为script_name

而后面的为path_info

比如这里的/wiki即为path_info

理解这点我们不难理解下面的配置文件了.

这里很欣赏nginx的配置文件的语法,弄的和脚本语言似的,有正则,有判断,有赋值

 

PS:为了彻底弄清楚fastcgi_split_path_info这个指令的工作原理,还去看了下nginx的源码,还好有c语言的功底.

这个没有文档的东东还真不容易找一些想知道的东西,除了看源码.

--------------------------------------------

MD 为了了解NGINX 中fastcgi_split_path_info这个指令的具体作用, 我读进了Nginx的源码src›http›modules›ngx_http_fastcgi_module.c 回复 回推 New Retweet 收藏 from Echofon2010-04-16 09:37:16

 

nginx fastcgi模块源码阅读:ngx_http_fastcgi_split_path_info(对应fastcgi_split_path_info 指令)这个函数将path的正则准备好到相应的结构体中 回复 回推 New Retweet 收藏 from Echofon2010-04-16 09:50:26

 

然后ngx_int_t ngx_http_fastcgi_path_info_variable和 ngx_http_fastcgi_script_name_variable这两个函数会解析正则并找依次取得两个group的值分别到 script_name和path_info中 回复 回推 New Retweet 收藏 from Echofon2010-04-16 09:51:47

 

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下面是nginx的配置文件

user admin;
worker_processes  5;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;
      
          location ~ ^/trac/([0-9a-zA-Z\-]*)/chrome(.*)$ {
          	 alias /home/admin/trac/$1/htdocs$2;
           }
         
      	fastcgi_split_path_info ^(/trac/[0-9a-zA-Z\-_]*[/]*)(.*)$;
     
	location ~ /htdocs/(.*){
        	root /home/admin/trac;
	} 

	if ($uri ~ ^/trac/([0-9a-zA-Z\-_]*).*$) {
    		set $trac_host $1;
	}
   	
	location ~ ^/trac/([0-9a-zA-Z\-]*)/login {
           	auth_basic           "trac";
            	auth_basic_user_file /home/admin/etc/trac_$trac_host.htpasswd;
            	fastcgi_pass  unix:/home/admin/run/trac_fastcgi_$trac_host.sock;
            	fastcgi_param  REQUEST_METHOD     $request_method;
            	fastcgi_param  SERVER_NAME        $server_name;
            	fastcgi_param  SERVER_PORT        $server_port;
            	fastcgi_param  SERVER_PROTOCOL    $server_protocol;
            	fastcgi_param  QUERY_STRING       $query_string;
            	fastcgi_param  REMOTE_USER        $remote_user;
            	fastcgi_param  AUTH_USER          $remote_user;
            	fastcgi_param  SCRIPT_NAME        /trac/$trac_host;
            	fastcgi_param  PATH_INFO          /$fastcgi_path_info;
            	fastcgi_param REMOTE_ADDR         $remote_addr; 
 	}
        
        location ~ ^/trac {
            	auth_basic           "trac";
            	fastcgi_pass  unix:/home/admin/run/trac_fastcgi_$trac_host.sock;
            	fastcgi_param  SCRIPT_NAME        /trac/$trac_host;
            	fastcgi_param  PATH_INFO          /$fastcgi_path_info;

            	## WSGI NEEDED VARIABLES - trac warns about them
            	fastcgi_param  REQUEST_METHOD     $request_method;
            	fastcgi_param  SERVER_NAME        $server_name;
            	fastcgi_param  SERVER_PORT        $server_port;
            	fastcgi_param  SERVER_PROTOCOL    $server_protocol;
            	fastcgi_param  QUERY_STRING       $query_string;
            	fastcgi_param  REMOTE_USER        $remote_user;
            	fastcgi_param  AUTH_USER          $remote_user;
            	fastcgi_param REMOTE_ADDR         $remote_addr;
            	#root   html;
            	#index  index.html index.htm;
        }
        
       location = / {
           index index.html
       }
        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443;
    #    server_name  localhost;

    #    ssl                  on;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_timeout  5m;

    #    ssl_protocols  SSLv2 SSLv3 TLSv1;
    #    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    #    ssl_prefer_server_ciphers   on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}