Alex Rivera | Logout

nginx maintenance page with content issue

Asked 2011-05-12T20:46:16.437
22

To show maintenance page during deploy I've always used next config in nginx:

if (-f /home/shared/system/maintenance.html) {
    return 503;
}

error_page 503 @maintenance;

location @maintenance {
    root /home/shared/errors;
    rewrite ^(.*)$ /maintenance.html break;
}

And everything was ok until I needed to add static content to maintenance page (images, stylesheets, etc.)

No of static content work with such logs in error.log:

2011/05/05 02:47:20 [notice] 13760#0: *6 "^(.*)$" matches "/some.jpg", client: x.x.x.x, server: server.com, request: "GET /some.jpg HTTP/1.1", host: "server.com"
2011/05/05 02:47:20 [notice] 13760#0: *6 rewritten data: "/maintenance.html", args: "", client: x.x.x.x, server: server.com, request: "GET /some.jpg 2 HTTP/1.1", host: "server.com"

Which is logical - if I do rewrite everything to maintenance.html that means that static content is not exclusion.

But I cannot find any proper solution to make redirect to every file except that ones which are physically existed in root /home/shared/errors folder.

PS. /home/shared/errors does not share any resources with common project folder - this is completely separate folder (even without any symlinks to /current for the project.

nginx maintenance-mode
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2 Answers

2

this solution works with only a single if statement, and is also much more readable and understandable:

upstream unicorn {
        server unix:/path/to/unicorn.sock;
}

server {
        listen 3000 default deferred;

        proxy_read_timeout 3600;
        client_max_body_size 4G;
        set_real_ip_from 0.0.0.0/0;

        root /path/to/current/public;
        try_files $uri/index.html $uri.html $uri @unicorn;

        error_page 404 /404.html;
        error_page 500 502 504 /500.html;
        error_page 503 /system/maintenance.html;

        location /404.html {
                internal;
        }

        location /500.html {
                internal;
        }

        location @unicorn {
                if (-f $document_root/system/maintenance.html) {
                        return 503;
                }

                proxy_set_header Host $http_host;
                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 $http_x_forwarded_proto;
                proxy_redirect off;
                proxy_pass http://unicorn;
        }
}
answered 2012-05-11T08:46:34.700
1
server {
    listen 80;
    server_name myserv.trunk;
    autoindex off;
    access_log /var/log/nginx/sitename-access.log;

    location ^~ /static/ {
       root /home/dev/myserv-site/;
    }

    location ~ /(?P<language>en)?/? {
        uwsgi_pass unix:///tmp/uwsgi.sock;
        include uwsgi_params;
        error_page 502 @fallback;
        error_page 503 @maintenance;
        if (-f /home/dev/myserv-site/maintenance.active) {
          return 503;
        }
    }

    location @fallback {
      root /home/dev/myserv-site/;
      if ($language) {
          rewrite ^(?!\/static\/)(.*)$ /static/html/502.$language.html break;
      }
      rewrite ^(?!\/static\/)(.*)$ /static/html/502.zh.html break;
    }

    location @maintenance {
      root /home/dev/myserv-site/;
      if ($language) {
          rewrite ^(?!\/static\/)(.*)$ /static/html/503.$language.html;
      }
      rewrite ^(?!\/static\/)(.*)$ /static/html/503.zh.html break;
   }
}

Here is a sample of translatable maintenance (503) or 502 error page screen. If user goes to http://site.com/en/ English page will be displayed(when maintenance.active file exists). static dir is inside myserv-site dir.

answered 2012-03-29T08:39:58.160

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