CODEWITHSUNDEEP
dokku
yegor256
yegor256

Reputation: 105193

Dokku redirects to another domain when requested site is down

I have Dokku installed on a server, with multiple sites/domains deployed to it. When one of my sites goes down, all HTTP requests to it get redirected (for some reason) to another site. This is confusing. I'm expecting Dokku to show some error page in this case. Is it the default behavior or I did something wrong?

PS. This is the problem: https://github.com/dokku/dokku/issues/2602

Upvotes: 9

Views: 861

Answers (2)

Christopher Oezbek
Christopher Oezbek

Reputation: 26473

This is not directly a Dokku issue, but a configuration issue with nginx.

If you don't have a default_server defined then nginx will fallback to the first server block in the configuration. This seems random, but is likely the Dokku app with the lexicographically first name.

To prevent this behavior add the following default server block manually:

# /etc/nginx/conf.d/default-site.conf
# Set default_server to drop/reject connections both http/https
server {
    listen 80 default_server;
    listen [::]:80 default_server;
    listen 443 default_server;
    listen [::]:443 default_server;
    access_log off;
    ssl_reject_handshake on; # Close https connection without response
    return 444; # Close http connection without response
}

Upvotes: 0

Nilanka Manoj
Nilanka Manoj

Reputation: 3728

How about adding a custom error page based on the error code by editing vhost file: 

server{
    server_name www.foo.com;
    root    /srv/www/foo/public_html;
    expires     1M;
    access_log  /srv/www/foo/logs/access.log;
    error_log   /srv/www/foo/logs/error.log;

    error_page 404 /404.html;

    location / {
        index   index.html;
        rewrite ^/(.*)/$ /$1 permanent;
        try_files "${uri}.html" $uri $uri/ =404;
    }

    location = /404.html {
        internal;
    }       
}

Your server error might be caught from codes 404 or 500

Upvotes: 0

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