[node.js] Forwarding port 80 to 8080 using NGINX

I'm using LEMP stack and Node JS on my debian server. Nginx works on port 80 and Node JS on 8080. I created new subdomain: cdn.domain.com for nodejs app. Currently I can access to Node JS application only like cdn.domain.com:8080/. What I want to do is to configure Nginx so that, when I enter to cdn.domain.com I can get app working on port 80. I think it can be done using nginx upstream. But I can't figure out how.

This is how you can achieve this.

upstream {
    nodeapp 127.0.0.1:8080;
}

server {
    listen 80;

    # The host name to respond to
    server_name cdn.domain.com;

    location /(.*) {
        proxy_pass http://nodeapp/$1$is_args$args;
        proxy_set_header X-Real-IP  $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Real-Port $server_port;
        proxy_set_header X-Real-Scheme $scheme;
    }
}

You can also use this configuration to load balance amongst multiple Node processes like so:

upstream {
    nodeapp 127.0.0.1:8081;
    nodeapp 127.0.0.1:8082;
    nodeapp 127.0.0.1:8083;
}

Where you are running your node server on ports 8081, 8082 and 8083 in separate processes. Nginx will easily load balance your traffic amongst these server processes.

NGINX supports WebSockets by allowing a tunnel to be setup between a client and a backend server. In order for NGINX to send the Upgrade request from the client to the backend server, Upgrade and Connection headers must be set explicitly. For example:

# WebSocket proxying
map $http_upgrade $connection_upgrade {
    default         upgrade;
    ''              close;
}


server {
    listen 80;

    # The host name to respond to
    server_name cdn.domain.com;

    location / {
        # Backend nodejs server
        proxy_pass          http://127.0.0.1:8080;
        proxy_http_version  1.1;
        proxy_set_header    Upgrade     $http_upgrade;
        proxy_set_header    Connection  $connection_upgrade;
    }
}

Source: http://nginx.com/blog/websocket-nginx/

you can do this very easy by using following in sudo vi /etc/nginx/sites-available/default

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    server_name _ your_domain;

    location /health {
            access_log off;
            return 200 "healthy\n";
    }

    location / {
            proxy_pass http://localhost:8080; 
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_cache_bypass $http_upgrade;
    }
  }

Simple is:

server {
    listen   80;
    server_name  p3000;
    location / {
        proxy_pass http://0.0.0.0:3000;
        include /etc/nginx/proxy_params;
    }
}

You can define an upstream and use it in proxy_pass

http://rohanambasta.blogspot.com/2016/02/redirect-nginx-request-to-upstream.html

server {  
   listen        8082;

   location ~ /(.*) {  
       proxy_pass  test_server;  
       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 $scheme;  
       proxy_redirect    off;  
   }  

}   

  upstream test_server  
     {  
         server test-server:8989  
}  

As simple as like this,

make sure to change example.com to your domain (or IP), and 8080 to your Node.js application port:

server {
    listen 80;
    server_name example.com;

    location / {
        proxy_set_header   X-Forwarded-For $remote_addr;
        proxy_set_header   Host $http_host;
        proxy_pass         "http://127.0.0.1:8080";
    }
}

Source: https://eladnava.com/binding-nodejs-port-80-using-nginx/

This worked for me:

server {
  listen  80; 
  server_name example.com www.example.com;

  location / { 
    proxy_pass                          http://127.0.0.1:8080/;
    proxy_set_header Host               $host;
    proxy_set_header X-Real-IP          $remote_addr;  
    proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
  }
}

If it does not work for you look at the logs at sudo tail -f /var/log/nginx/error.log