Manage crontab directly from your Django database
They are plenty of implementation of crontabs in Python and Django, but our issue was their elasticity. Generally a set of classes will allow you to create a crontab, here in django-dbcron, things are stored in database instead of Python classes.
Classic pip install:
pip install django-dbcron
Add it to you INSTALLED_APPS:
INSTALLED_APPS = ( ... 'dbcron', ... )
Launch migrations:
./manage.py migrate dbcron
This app owns its own cron daemon, launch it with:
./manage.py crond
The daemon will act as a classic cron and will run each task in a new thread, leaving the main one continuing.
The cron table is set in database and the Django admin site is a quick solution to manage you jobs.
Just play with the model:
from dbcron.models import Job
# Run now() each minute
job = Job.object.create(
name='My job',
func='django.utils.timezone.now',
is_active=True,
sec="0",
min="*/1,
hou="*",
dom="*",
mon="*",
dow="*",
yea="*"
)
# Test it
job.run()
The cron daemon launches jobs as they are requested with:
- function's path
- arguments and keyword arguments
There's no security about who/when/how, just functions launched abritairly, Be careful who can set crontab, and do not hesitate to limit possible values.