Docker Celery configuration – For Django/React/Redis/Celery project. No Celery logo and background task log appearing

I have created a project github repository that has Docker, Django, React, Redis, Celery:
https://github.com/axilaris/dockerize-django-react-celery-redis. My goal is to get celery working correctly with the logo appearing and background task log prints.

This is based from this Docker – React and Django example tutorial code:
https://github.com/dotja/authentication_app_react_django_rest

And trying to use Docker – Celery & Redis from this tutorial code:
https://github.com/veryacademy/docker-mastery-with-django/tree/main/Part-4%20Django%20Postgres%20Redis%20and%20Celery <– Part 4 tutorial for Celery & Redis

Here is the docker-compose.yaml for the redis & celery part:

# Redis
  redis:
    image: redis:alpine
    container_name: redis
    ports:
      - "6379:6379"

# celery
  celery:
    restart: always
    build:
      context: ./backend
    command: celery -A backend worker -l DEBUG
    volumes:
      - .:/django
    container_name: celery  
    depends_on:
      - redis
      - backend

here is how I implemented the background tasks in user_api/tasks.py (https://github.com/axilaris/dockerize-django-react-celery-redis/blob/main/backend/user_api/tasks.py)

in backend/user_api/tasks.py

from __future__ import absolute_import, unicode_literals

from celery import shared_task
import logging

@shared_task
def add(x, y):
    logging.debug("XXX add")
    return x + y

my project should work very simply by running:

 docker-compose build
 docker-compose up

However, there is no celery logo (1) and I dont see the logs print on the background process (2). I think it is executing as result.ready returns. But I want these 2 for completeness. (eventhough result.ready maybe be working with celery executing background task)

It did not print this celery logo. (you can check the full log prints for docker-compose up – https://gist.github.com/axilaris/a2776fc8f39e53bbc93e0d7a4e0ba0f5):

celery       |  -------------- celery@b755a7cdba8d v5.3.6 (emerald-rush)
celery       | --- ***** ----- 
celery       | -- ******* ---- Linux-6.6.12-linuxkit-aarch64-with 2024-03-02 20:48:06
celery       | - *** --- * --- 
celery       | - ** ---------- [config]
celery       | - ** ---------- .> app:         core:0xffff9bbd7550
celery       | - ** ---------- .> transport:   redis://redis:6379//
celery       | - ** ---------- .> results:     redis://redis:6379/
celery       | - *** --- * --- .> concurrency: 10 (prefork)
celery       | -- ******* ---- .> task events: OFF (enable -E to monitor tasks in this worker)
celery       | --- ***** ----- 
celery       |  -------------- [queues]
celery       |                 .> celery           exchange=celery(direct) key=celery

and here is how I execute the background task, but there is no log prints in django logs on the background task. (you can find the full log prints https://gist.github.com/axilaris/a2776fc8f39e53bbc93e0d7a4e0ba0f5)

>>> % docker exec -it backend_container sh 
>>> /app # python manage.py shell
>>> Python 3.9.18 (main, Jan 27 2024, 07:18:02) 
>>> [GCC 13.2.1 20231014] on linux
>>> Type "help", "copyright", "credits" or "license" for more information.
>>> (InteractiveConsole)
>>> from user_api.tasks import add
>>> result = add.delay(2, 2)
>>> result.ready
<bound method AsyncResult.ready of <AsyncResult: 9046dd90-f44d-4eba-9881-acc0fbc4278a>>

My goal is to see that celery logo print above and to verify in the django logs that the background process is executed just like in (https://youtu.be/oBQxFn1CDno?si=58ZRfLZeuCC8fz01&t=1204 at 20:04).