502 from upstream not handled by nginx error_page

[Igor Sysoev]

On Fri, Jun 12, 2009 at 04:15:24PM -0400, JamesHarrison wrote:

> Hi,
> 
> I'm having issues serving up a custom 502 using upstream; essentially nginx's 502 is always shown, despite having a custom 502 page set up with error_page.
> 
> The configuration is here: http://pastie.org/private/8kjglkprvw8pfoeqkjcbug
> 
> I've tried this with proxy_intercept_errors on, off, in the location and server blocks. Sadly, no dice.
> 
> Error logs show nothing but 2009/06/12 20:04:43  14569#0: *2 no live upstreams while connecting to upstream
> 
> The file it's trying to serve from for the 502 page is in the same folder with the same permissions as the static data nginx hosts anyway.
> 
> Any ideas why this 502 is being ignored?

You should use location, but not path in error_page:

 error_page 502 /opt/www/charactr/current/public/502.html;

 error_page 502 /502.html;

 loction = /503.html {
     # the root is iherited from server level
     #root   /opt/www/charactr/current/public/;
 }

Instead of

 location / {
    proxy_set_header X-Real-IP  $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;

    if (-f $request_filename/index.html) {
      rewrite (.*) $1/index.html break;
    }

    if (-f $request_filename.html) {
      rewrite (.*) $1.html break;
    }

    if (!-f $request_filename) {
      proxy_pass http://charactrapp;
      break;
    }
 }

it's better to use

  location / {
     try_files  $uri/index.html $uri.html  $uri  @charactrapp;
  }

  location @charactrapp {
    proxy_pass http://charactrapp;

    proxy_set_header X-Real-IP  $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;
  }

Also, if you use 0.7.x, it's better to use

gzip_disable     msie6;

instead of

gzip_disable     "MSIE [1-6]\.";


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