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This tutorial shows you how to have NGINX use different folders as different upstream proxy's.

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By default, if you have a location block which has a proxy pass, and the location block is a folder, for example /wiki, the folder is sent back to the proxied server:

location /nagios/ {
    proxy_pass  http://10.0.21.8:80/;
    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_set_header X-Forwarded-Proto https;
    proxy_redirect    off;
}

The above block will, when browsed, sent you to http://10.0.21.8/nagios/, because that is the nginx location. However, if you want it to go to http://10.0.21.8/ you either have to rewrite or use the / location.

The below example has the correct rewrite rule:

location /nagios/ {
    rewrite ^/nagios(/.*)$ $1 break;
    proxy_pass  http://10.0.21.8:80/;
    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_set_header X-Forwarded-Proto https;
    proxy_redirect    off;
}

As you can see, this line:

rewrite ^/collectd(/.*)$ $1 break;

fixes the above problem, and sends you to http://10.0.21.8/ instead of http://10.0.21.8/nagios.

Tags: apache , folder , nginx , proxy , subfolder , tutorials