host not found in upstream when i use nginx and docker-compose - django

Question

this is my docker-compose.yml file
i want to make a nginx to reverseproxy and django to webserver
and i also separate them each container
version: '2'
services:
django:
build: ./django
container_name: django
nginx:
restart: always
build: ./nginx
container_name: reversproxy
ports:
- "7891:7891"
depends_on:
- django
and follwoing is my nginx.conf
i set the uwsgi_pass to uwsgicluster, upstream to django containter
but nginx container doesn't work with error
nginx: [emerg] host not found in upstream "django:7893"
worker_processes 1;
events { worker_connections 1024; }
http {
sendfile on;
upstream uwsgicluster {
server django:7893;
}
server {
listen 7891;
location / {
include /etc/nginx/uwsgi_params;
uwsgi_pass uwsgicluster;
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;
}
}
}
how can i solve that problem??

Answer 1

You should define links in docker compose file to link django to nginx, or nginx will not be able to access django container.
links
Link to containers in another service. Either specify both the service
name and a link alias ("SERVICE:ALIAS"), or just the service name.
Official document explain