Django channels daphne returns 200 status code

Question

I have setup a Django application with Nginx + uwsgi. The application also uses django-channels with redis. When deploying the setup in an individual machine, everything works fine.

But when I tried to setup the app in 2 instances and setup a common load balancer to coordinate the requests, the request get properly routed to the daphne process and I can see the logs. But the status code returned from the daphne process is 200 instead of 101.

Load balancer nginx conf:

upstream webservers {
    server 10.1.1.2;
    server 10.1.1.3;
}


server {
    location / {
        proxy_pass http://webservers;
    }
}

Versions used:

daphne==2.2.4
channels==2.1.6
channels-redis==2.3.2

All the routing works fine and there are no errors, but just that the status code returned is 200 instead of 101.

Answer 1

Try to add following headers, hope that this will help:

server {
    location / {
        proxy_pass http://webservers;

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

Full official instruction about how to setup Django Channels + Nginx can be found here