CODEWITHSUNDEEP
nginxuwsgi
rolph-recto
rolph-recto

Reputation: 41

502 Bad Gateway error Nginx and uWSGI in deploying Flask app

I'm trying to deploy a Flask app on a Linode VPS running Ubuntu 10.10. I've been following this tutorial (https://library.linode.com/web-servers/nginx/python-uwsgi/ubuntu-10.10-maverick#sph_configure-nginx) but I keep getting a 502 Bad Gateway error.

Here this is /etc/default/uwsgi:

PYTHONPATH=/var/www/reframeit-im
MODULE=wsgi

Here is /var/www/reframeit-im/wsgi.py:

# add the application directory to the python path
import sys
sys.path.append("/var/www/reframeit-im")

# run flask app
from reframeit import app as application

Here is the app's nginx config file, which is symlinked to the /sites-enabled directory (/opt/nginx/conf/sites-enabled/reframeit-im):

server {
    listen 80;
    server_name www.reframeit-im.coshx.com reframeit-im.coshx.com;
    access_log /var/www/reframeit-im/logs/access.log;
    error_log /var/www/reframeit-im/logs/error.log;

    location / {
        include uwsgi_params;
        uwsgi_pass 127.0.0.1:9001;
    }
}

I checked the nginx error logs for the app and I found this:

2013/07/17 19:30:19 [error] 20037#0: *1 upstream prematurely closed connection while reading response header from upstream, client: 70.88.168.82, server: www.reframeit-im.coshx.com, request: "GET /favicon.ico HTTP/1.1", upstream: "uwsgi://127.0.0.1:9001", host: "reframeit-im.coshx.com"

Is there something wrong with my configuration?

Upvotes: 2

Views: 4837

Answers (2)

user3281870
user3281870

Reputation: 1

Please add "protocol = uwsgi" apart from what Flavio has suggested. As below

PYTHONPATH=/var/www/reframeit-im
MODULE=wsgi
socket=127.0.0.1:9001
protocol = uwsgi

Upvotes: 0

flaviodesousa
flaviodesousa

Reputation: 7815

With uwsgi_pass 127.0.0.1:9001; you declared to Nginx your intent to talk to uWSGI through TCP socket, but have not warned uWSGI about it.

Try adding a corresponding socket line to your /etc/default/uwsgi file:

PYTHONPATH=/var/www/reframeit-im
MODULE=wsgi
socket=127.0.0.1:9001

Upvotes: 1

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