celery workers unable to connect to dockerized redis instance using Django - django

Question

Currently have a dockerized django application and intended on using Celery to handle a long-running task.
BUT Docker-compose up fails with following error:
[2018-12-17 17:25:59,710: ERROR/MainProcess] consumer: Cannot
connect to redis://redis:6379//: Error -2 connecting to redis:6379.
Name or service not known..
There are some similar questions concerning this on SOF but they all seem to focus on CELERY_BROKER_URL in settings.py, which I believe I have set correctly as follows
CELERY_BROKER_URL = 'redis://redis:6379'
CELERY_RESULT_BACKEND = 'redis://redis:6379'
My docker-compose.yml :
db:
image: postgres:10.1-alpine
restart: unless-stopped
volumes:
- postgres_data:/var/lib/postgresql/data/
networks:
- dsne-django-nginx
django: &python
restart: unless-stopped
build:
context: .
networks:
- dsne-django-nginx
volumes:
- dsne-django-static:/usr/src/app/static
- dsne-django-media:/usr/src/app/media
ports:
- 8000:8000
depends_on:
- db
- redis
- celery_worker
nginx:
container_name: dsne-nginx
restart: unless-stopped
build:
context: ./nginx
dockerfile: nginx.dockerfile
networks:
- dsne-django-nginx
volumes:
- dsne-django-static:/usr/src/app/static
- dsne-django-media:/usr/src/app/media
- dsne-nginx-cert:/etc/ssl/certs:ro
- /etc/ssl/:/etc/ssl/
- /usr/share/ca-certificates/:/usr/share/ca-certificates/
ports:
- 80:80
- 443:443
depends_on:
- django
redis:
image: redis:alpine
celery_worker:
<<: *python
command: celery -A fv1 worker --loglevel=info
ports: []
depends_on:
- redis
- db
volumes:
postgres_data:
dsne-django-static:
driver: local
dsne-django-media:
driver: local
dsne-nginx-cert:
networks:
dsne-django-nginx:
driver: bridge
init.py :
from .celery import fv1 as celery_app
__all__ = ('celery_app',)
celery.py :
from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
import fv1
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'fv1.settings')
app = Celery('fv1')
# Using a string here means the worker doesn't have to serialize
# the configuration object to child processes.
# - namespace='CELERY' means all celery-related configuration keys
# should have a `CELERY_` prefix.
app.config_from_object('django.conf:settings', namespace='CELERY')
# Load task modules from all registered Django app configs.
app.autodiscover_tasks()
#app.task(bind=True)
def debug_task(self):
print('Request: {0!r}'.format(self.request))
Where am I going wrong and why can't my celery workers connect to Redis?

Answer 1

your redis container does not list port 6379