Nginx proxy pass configuration docker

Question

Here's the problem:

The host machine has multiple docker apps running on different ports for eg. App1 @ 3001, App2 @ 3002...3100 etc

Now I would like to access the apps in this format http://hostname.com/app1, http://hostname.com/app2..

To do this i'm running nginx on the host to proxy requests to the right port based on the sub-uri

location = /app1 {
    proxy_redirect http://hostname:3001/;
    include /etc/nginx/proxy_params;
}

location ^~ /app1 {
    proxy_redirect http://hostname:3001/app1;
    include /etc/nginx/proxy_params;
}

But this does not work when the site's sub uri changes or if the site redirects. For example:

If I visit the site at hostname:3001 -> I can see the site
If I visit the site at http://hostname.com/app1 -> I can see the site
If the site page is at hostname:3001/static/index.html then when i access it as http://hostname.com/app1 the page changes to http://hostname.com/static/index.html -> I get 404.

Is there a way to do this? Or is the only way to do it is to set the dns as app1.hostname.com and do a name based routing?

Answer 1

Inside your server {} block you want:

location /app1 {
    rewrite ^/app1(.*) /$1 break;
    proxy_pass http://hostname:3001/;
    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;
}

location /app2 {
    rewrite ^/app2(.*) /$1 break;
    proxy_pass http://hostname:3002/;
    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;
}

The rewrite rule here will pass the correct uris to the ports

Answer 2

You can make every app listens on a separate port (e.g. 3000 and 3001) then configure your nginx as follows (include it inside the server {} definition block):

 location /app1 {
  proxy_pass        http://localhost:3000;
  proxy_set_header  X-Real-IP  $remote_addr;
 }

 location /app2 {
  proxy_pass        http://localhost:3001;
  proxy_set_header  X-Real-IP  $remote_addr;
 }