Flask install 502 Bad Gateway nginx

Question

I am beginner in python development and I first time tried to upload to server DigitalOcean. I followed this tutorial link. But I have a problem when I finished tutorial 502 Bad Gateway nginx/1.10.0 (Ubuntu)

Zlty.ini

[uwsgi]
module = wsgi:app

master = true

socket = zlty.sock
chmod-socket = 660
vacuum = true

die-on-term = true

Zlty.service

[Unit]
Description=uWSGI instance to serve zlty
After=network.target

[Service]
User=dendis
Group=www-data
WorkingDirectory=/home/dendis/zlty
Environment="PATH=/home/dendis/zlty/zltyenv/bin"
ExecStart=/home/dendis/zlty/zltyenv/bin/uwsgi --ini zlty.ini

[Install]
WantedBy=multi-user.target

sites-available

server {
    listen 80;
    server_name 139.59.145.129;

    location / {
        include uwsgi_params;
        uwsgi_pass unix:/home/dendis/zlty/zlty.sock;
    }
}

Log in nginx
2016/07/26 03:53:02 [crit] 9563#9563: *9 connect() to unix:/home/dendis/zlty/zlty.sock failed (2: No such file or directory) while connecting to upstream, client: 188.123.100.136, server: 139.59.145.129, request: "GET / HTTP/1.1", upstream: "uwsgi://unix:/home/dendis/zlty/zlty.sock:", host: "139.59.145.129"

Answer 1

ryanpq July 27, 2016

When following this tutorial did you complete the section on creating and testing a sample application. This section included temporarily opening port 5000 and ensuring the app is returned. It sounds like the flask application itself is not responding when it is requested by nginx upstream so working from the bottom of the stack should be the best way to identify the issue.

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Answer 2

Elizine July 28, 2016

Replace

   ``` uwsgi_pass unix:/home/jrm2k6/jeremydagorn-blog/jeremydagorn.sock;```

with

   ```uwsgi_pass unix:///home/jrm2k6/jeremydagorn-blog/jeremydagorn.sock;```

and restart Nginx. It might help you.

OR refer - https://www.digitalocean.com/community/questions/how-to-fix-502-bad-gateway-error-with-nginx-uwsgi-for-flask-app

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easycompany80 October 2, 2016

That didn’t work for me, Ive already read that other link to and same, still doesn’t work, this is the tutorial

https://www.digitalocean.com/community/tutorials/how-to-set-up-uwsgi-and-nginx-to-serve-python-apps-on-ubuntu-14-04

Ive followed everything exactly and still doesn’t work, the only thing I can get to work is getting the app content to return at :8080 when I run this command

uwsgi –socket 0.0.0.0:8080 –protocol=http -w wsgi

How To Set Up uWSGI and Nginx to Serve Python Apps on Ubuntu 14.04
by Justin Ellingwood
In this guide, we will be setting up a simple WSGI application served by uWSGI. We will use the Nginx web server as a reverse proxy to the application server to provide more robust connection handling. We will be installing and configuring these components on an Ubuntu 14.04...
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Answer 3

easycompany80 October 2, 2016

That didn’t work for me, Ive already read that other link to and same, still doesn’t work, this is the tutorial

https://www.digitalocean.com/community/tutorials/how-to-set-up-uwsgi-and-nginx-to-serve-python-apps-on-ubuntu-14-04

Ive followed everything exactly and still doesn’t work, the only thing I can get to work is getting the app content to return at :8080 when I run this command

uwsgi –socket 0.0.0.0:8080 –protocol=http -w wsgi

How To Set Up uWSGI and Nginx to Serve Python Apps on Ubuntu 14.04
by Justin Ellingwood
In this guide, we will be setting up a simple WSGI application served by uWSGI. We will use the Nginx web server as a reverse proxy to the application server to provide more robust connection handling. We will be installing and configuring these components on an Ubuntu 14.04...
Reply Report

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