Django, Nginx, uwsgi, Kubernetes: unable to connect nginx to uwsgi stream - django

Question

I have a django container and an Ngix container. they work fine with docker-compose, and now im trying to use the images with kubernetes. Everything works fine, except the fact that the nginx container cannot connect to the uwsgi upstream. No response is being returned.
Here are my configuration:
# Nginx congifuration
upstream django {
server admin-api-app:8001 max_fails=20 fail_timeout=10s; # for a web port socket (we'll use this first),
}
server {
# the port your site will be served on
listen 80;
server_name server localhost my-website-domain.de;
charset utf-8;
location / {
uwsgi_pass django;
include /etc/nginx/uwsgi_params;
}
}
# Uwsgi file
module = site_module.wsgi
master = true
processes = 5
socket = :8001
enable-threads = true
vacuum=True
# Kubernetes
# Backend Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: container-backend
labels:
app: backend
spec:
replicas: 1
selector:
matchLabels:
app: backend
template:
metadata:
labels:
app: backend
spec:
containers:
- name: container-backend
image: my-djangoimage:latest
command: ["./docker/entrypoint.sh"]
ports:
- containerPort: 8001
name: uwsgi
- name: nginx
image: my-nginx-image:latest
imagePullPolicy: Always
ports:
- containerPort: 80
name: http
---
# Backend Service
kind: Service
apiVersion: v1
metadata:
name: admin-api-app
spec:
selector:
app: backend
ports:
- port: 80
targetPort: 80
type: LoadBalancer

Answer 1

You probably need to change host in your django upstream because, as far as I understand, you want to connect to your django app located in the same pod where is nginx so try to change:
server admin-api-app:8001 max_fails=20 fail_timeout=10s;
to
server localhost:8001 max_fails=20 fail_timeout=10s;
Edit:
To make it work you need to change socket to http-socket but it can be painful/pointless as described here: Should I have separate containers for Flask, uWSGI, and nginx?