Why does my websocket keep disconnecting in Django Channels App?

Question

I have been on this for a month now without a working solution. Everything works fine in production but I have been trying to deploy my django-channels application using nginx as reverse proxy, supervisor to keep servers running, gunicorn to serve http requests and I am stuck at the weboscket request part using daphne to process http requests.

I am bindig with unix sockets: gunicorn.sock and daphne.sock The Console returns:

WebSocket connection to 'ws://theminglemarket.com/ws/chat/undefined/' failed: 
Error during WebSocket handshake: Unexpected response code: 500

My supervisor config:

directory=/home/path/to/src
command=/home/path/to/venv/bin/gunicorn_start
user=root
autostart=true
autorestart=true
redirect_stderr=true
stdout_logfile=/path/to/log/gunicorn/gunicorn-error.log

[program:serverinterface]
directory=/home/path/to/src
command=/home/path/to/venv/bin/daphne -u /var/run/daphne.sock chat.asgi:application
autostart=true
autorestart=true
stopasgroup=true
user=root
stdout_logfile = /path/to/log/gunicorn/daphne-error.log

Redis server is up and Running, Sure of that, using redis-server my nginx configurations:

upstream channels-backend {
#   server 0.0.0.0:8001;
    server unix:/var/run/daphne.sock fail_timeout=0;
}
upstream app_server {
    server unix:/var/run/gunicorn.sock fail_timeout=0;
}
server {
    listen 80;
    listen [::]:80;
    
    server_name theminglemarket.com www.theminglemarket.com;
    keepalive_timeout 5;
    client_max_body_size 4G;
    access_log /home/path/to/logs/nginx-access.log;
    error_log /home/path/to/logs/nginx-error.log;


    location /static/ {
        alias /home/path/to/src/static/;
        # try_files $uri $uri/ =404;
    }
    location / {
        try_files $uri @proxy_to_app;
    }
    location /ws/ {
        try_files $uri @proxy_to_ws;
    }
    location @proxy_to_ws {
        proxy_pass http://channels-backend;

        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        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;
        proxy_set_header X-Forwarded-Host $server_name;
    }
    location @proxy_to_app {
        proxy_pass http://app_server;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        # we don't want nginx trying to do something clever with
        # redirects, we set the Host: header above already.
        proxy_redirect off;
    }
}

Please ask for any other thing needed, I'll update as quickly as I can. Thank You. It's a chatting application, do you think I should use only Daphne, I'm considering the scalability, and that's why I used gunicorn to serve http requests. Hosting on Ubuntu Server

My server kept stopping until I came to know that it's the out of memory issue, so I upgraded the memory and it works like charm now. — Charanjit Singh, Aug 31 '20 at 03:10
My server is new, so I am sure it's not memory issue and it's the websockets that keep disconnecting — El_professuer, Aug 31 '20 at 10:56
It's not a gunicorn error tho, The gunicorn serves http requests fine, but daphne doesn't seem to serve the websockets — El_professuer, Sep 03 '20 at 02:02

MijatTomić · Answer 1 · 2022-12-14T17:08:43.107

Try putting socket=tcp://0.0.0.0:8001 or socket=tcp://localhost:8001 in your [program:serverinterface] part of supervisord.conf. After that read your supervisor_log.log file to find out how it behaves. I had similar problems with it too. I hope that this helps. Use socket=tcp://localhost:8001 if it's inside of docker container. And make sure that nginx container is on the same docker network as that container.

Why does my websocket keep disconnecting in Django Channels App?

1 Answers1