Forum: NGINX Reverse proxy and rewrite. Need help !

Hey ,

I have two domains, domain.net and domain.com and considering the
expected lack of IP addresses I want to setup a sites hub/reverse proxy.
Nginx 0.7.6x is installed on a debian 5.x box and works fine so far. Now
I’m stuck with this 4 cases scenario:

1. www.domain.net ----> nginx ------(no rewrite)------>
internal-www.domain.net box
Nginx should pass the whole url to the internal box. Here’s my config
server {
listen 80;
server_name www.domain.net;

#charset koi8-r;

access_log logs/www.domain.net.access.log;

location / {
proxy_pass http://internal-www.domain.net;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

2. www.domain.com ----> nginx ------(rewrite)------>
internal-com.domain.net box
nginx should rewrite the base url (http://www.domain.com to
http://com.domain.net before passing it to the internal box)
ex : http://www.domain.com/index.html rewritten to
http://com.domain.net/index.html and send to the box

3. pub.domain.net/alias1 ----> nginx ------(rewrite)------>
internal-pub.domain.net box
nginx should rewrite the url to remove the “/alias1” part before passing
it to the internal box (which is a drupal site…).
ex : http://pub.domain.net/alias1/index.php rewritten to
http://pub.domain.net/index.php and send to the box

4. pub.domain.net/alias2 ----> nginx ------(rewrite)------>
internal-alias2.domain.net box
nginx should rewrite the url from pub.domain.net/alias2 to
alias2.domain.net part before passing it to the internal box
ex: http://pub.domain.net/alias2 rewritten to http://alias2.domain.net
and send to the box.

After some hair pulling, a lot of “Should I use proxy_pass or
proxy_redirect ?” and “is drupal messing with something”, any help would
be really appreciated.

Thanks

Blitter

On Fri, Mar 05, 2010 at 03:18:17PM +0100, Da Blitter wrote:

> server {
> proxy_set_header Host $host;
> 
> alias2.domain.net part before passing it to the internal box
> ex: http://pub.domain.net/alias2 rewritten to http://alias2.domain.net
> and send to the box.
> 
> After some hair pulling, a lot of “Should I use proxy_pass or
> proxy_redirect ?” and “is drupal messing with something”, any help would
> be really appreciated.

  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

  server {
      server_name  www.domain.net;
      location / {
          proxy_pass http://internal-www.domain.net;
      }
  }

  server {
      server_name  www.domain.com;
      location / {
          proxy_pass http://internal-com.domain.net;
      }
  }

  server {
      server_name  pub.domain.net;
      location /alias1/ {
          proxy_pass http://internal-pub.domain.net/;
      }
      location /alias2/ {
          proxy_pass http://internal-alias2.domain.net/;
      }
  }


--
Igor Sysoev
http://sysoev.ru/en/

On Fri, Mar 05, 2010 at 05:32:11PM +0300, Igor Sysoev wrote:

> > internal-www.domain.net box
> > proxy_pass http://internal-www.domain.net;
> > ex : http://www.domain.com/index.html rewritten to
> > internal-alias2.domain.net box
> > nginx should rewrite the url from pub.domain.net/alias2 to
> > alias2.domain.net part before passing it to the internal box
> > ex: http://pub.domain.net/alias2 rewritten to http://alias2.domain.net
> > and send to the box.
> > 
> > After some hair pulling, a lot of “Should I use proxy_pass or
> > proxy_redirect ?” and “is drupal messing with something”, any help would
> > be really appreciated.
> 
>   proxy_set_header Host $host;

"Host" is probably is not needed.

>   server {
>       }
>       location /alias2/ {
>           proxy_pass http://internal-alias2.domain.net/;
>       }
>   }

Also you should not disable proxy_redirect, if backend send such 
redirects:
Location: http://internal-www.domain.net/some/url
Location: http://internal-pub.domain.net/another/url


--
Igor Sysoev
http://sysoev.ru/en/

Thanks for your help Igor.

I still have some issues but I'll make some new tries on monday.

Blitter

location /alias2/ {
#  proxy_set_header Host $host;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_pass http://alias2.domain.net/;
   proxy_redirect default;
}

When I type http://pub.domain.net/alias2 in a browser, I can reach the 
backend machine with this url but the displayed page is messy. Is there 
any way to rewrite/force the url in the browser ?

Blitter