I currently have an app deployed on Heroku. I’ve recently added celery with redis. The app works fine on my device but when I try to deploy on Heroku everything works fine up until the Celery task should be called. However nothing happens and I don’t get any error logs from Heroku. Here is my code:
settings.py:
CELERY_BROKER_URL = env('CELERY_BROKER_URL')
CELERY_RESULT_BACKEND = env('CELERY_RESULT_BACKEND')
CELERY_CACHE_BACKEND = "default"
CELERY_ACCEPT_CONTENT = ['json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = 'UTC'
views.py:
task = transcribe_file_task.delay(file_path, audio_language, output_file_type, 'ai_transcribe_output', session_id)
celery.py:
from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
from django.conf import settings
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
app = Celery("mysite")
app.config_from_object("django.conf:settings", namespace="CELERY")
app.autodiscover_tasks()
docker-compose.yml:
services:
web:
environment:
...
* CELERY_BROKER_URL=redis://redis:6379/0
* CELERY_RESULT_BACKEND=redis://redis:6379/0
...
services:
celery:
environment:
...
* CELERY_BROKER_URL=redis://redis:6379/0
* CELERY_RESULT_BACKEND=redis://redis:6379/0
heroku.yml:
setup:
addons:
* plan: heroku-postgresql
* plan: heroku-redis
build:
docker:
web: Dockerfile
celery: Dockerfile
release:
image: web
command:
* python [manage.py](http://manage.py) collectstatic --noinput
run:
web: gunicorn mysite.wsgi
celery: celery -A mysite worker --loglevel=info
requirements.txt:
environs[django]==9.5.0
I don’t use a Procfile.
To set up redis on Heroku I went read the steps in this tutorial and simply followed the url in the ‘Heroku Data for Redis’ line and installed it. Then I committed to Github and ran >heroku git:remote -a <app name> and pushed to Heroku using >git push heroku main.