Question

NGINX -> Docker Container Node App gives ERR_TOO_MANY_REDIRECTS or ERR_CONNECTION_REFUSED

I have the following Nginx config:

# HTTP redirect all traffic to HTTPS
server {
        listen 80 default_server;
        listen [::]:80 default_server;
        # server_name linkmelater.win;
        if ($scheme = "http") { # Only redirect if not using SSL
        #       return 301 https://$server_name$request_uri;
                return 302 https://$host$request_uri;
        }
}


# HTTPS — proxy all requests to the Node app
server {
    # Enable HTTP/2
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name linkmelater.win;

    # Use the Let’s Encrypt certificates
    ssl_certificate /etc/letsencrypt/live/linkmelater.win/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/linkmelater.win/privkey.pem;

    # Include the SSL configuration from cipherli.st
    include snippets/ssl-params.conf;

    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-NginX-Proxy true;
        proxy_pass http://localhost:5000;
#        proxy_pass http://0.0.0.0:5000;
        proxy_ssl_session_reuse off;
        proxy_set_header Host $http_host;
        proxy_cache_bypass $http_upgrade;
        proxy_redirect off;
    }
}

And a Docker container that I run using docker run -p 5000:5000 -d -e NODE_ENV=production containername:tagname

The container is running properly and the Node server listens on 5000 like so:

if (process.env.NODE_ENV === 'production') {
	server = app.listen(process.env.PORT || 9145, function () {
		logger.info('Production Server listening on port ' + process.env.PORT || 9145);
		process.env.DOMAIN = '0.0.0.0:' + process.env.PORT;
	});
}

For some reason when I go to https://www.linkmelater.win I get ERR_TOO_MANY_REDIRECTS and when I navigate to the IP and Port directly (https://67.205.153.198:5000/) I get ERR_CONNECTION_CLOSED. This was all working before I added the Nginx layer (for SSL/RP) and it all works locally where I don’t run the Nginx server and just access localhost:5000 directly.

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disabling this line proxy_set_header Host $http_host; ended up fixing it.