Description:

djangocrontab 0.7.1

about
dead simple crontab powered job scheduling for django (1.8+).


setup
install via pip:
pip install django-crontab
add it to installed apps in django settings.py:
INSTALLED_APPS = (
'django_crontab',
...
)
now create a new method that should be executed by cron every 5 minutes, f.e. in myapp/cron.py:
def my_scheduled_job():
pass
now add this to your settings.py:
CRONJOBS = [
('*/5 * * * *', 'myapp.cron.my_scheduled_job')
]
you can also define positional and keyword arguments which let you call django management commands:
CRONJOBS = [
('*/5 * * * *', 'myapp.cron.other_scheduled_job', ['arg1', 'arg2'], {'verbose': 0}),
('0 4 * * *', 'django.core.management.call_command', ['clearsessions']),
]
finally run this command to add all defined jobs from CRONJOBS to crontab (of the user which you are running this command with):
python manage.py crontab add
show current active jobs of this project:
python manage.py crontab show
removing all defined jobs is straight forward:
python manage.py crontab remove


config
there are a bunch of setting vars to customize behavior. each of this comes with default values that should properly fit. if not, feel free to overwrite.

CRONJOBS

list of jobs, each defined as tuple:

format 1:

required: cron timing (in usual format: http://en.wikipedia.org/wiki/Cron#Format)
required: the python module path to the method
optional: a job specific suffix (f.e. to redirect out/err to a file, default: ‘’)


format 2:

required: cron timing (in usual format: http://en.wikipedia.org/wiki/Cron#Format)
required: the python module path to the method
optional: list of positional arguments for the method (default: [])
optional: dict of keyword arguments for the method (default: {})
optional: a job specific suffix (f.e. to redirect out/err to a file, default: ‘’)




NOTE: Run “python manage.py crontab add” each time you change CRONJOBS in any way!
default: []
example:
CRONJOBS = [
('*/5 * * * *', 'myapp.cron.my_scheduled_job'),

# format 1
('0 0 1 * *', 'myapp.cron.my_scheduled_job', '>> /tmp/scheduled_job.log'),

# format 2
('0 0 1 * *', 'myapp.cron.other_scheduled_job', ['myapp']),
('0 0 * * 0', 'django.core.management.call_command', ['dumpdata', 'auth'], {'indent': 4}, '> /home/john/backups/last_sunday_auth_backup.json'),
]



CRONTAB_LOCK_JOBS

prevent starting a job if an old instance of the same job is still running
default: False
since 0.5.0


CRONTAB_EXECUTABLE

path to the crontab executable of your os
default: ‘/usr/bin/crontab’


CRONTAB_DJANGO_PROJECT_NAME

the name of your django project, used to build path path to manage.py and to mark the jobs in contrab via comment for later removing
default is read from DJANGO_SETTINGS_MODULE environment variable


CRONTAB_DJANGO_MANAGE_PATH

path to manage.py file (including the manage.py itself, i.e. ‘/home/john/web/manage.py’)
default is build using DJANGO_PROJECT_NAME


CRONTAB_DJANGO_SETTINGS_MODULE

dotted python path to the settings module to run the command with
default is the common one from the environment variable and will not be overwritten
since 0.6.0


CRONTAB_PYTHON_EXECUTABLE

path to the python interpreter executable used to run the scheduled job
default uses the interpreter executable used to add the jobs (via ‘python manage.py crontab add’)


CRONTAB_COMMAND_PREFIX

something you wanne do or declare before each job gets executed. A good point for environment variables.
default: ‘’ (empty string)
example: ‘STAGE=production’


CRONTAB_COMMAND_SUFFIX

something you wanne do after each job was executed.
default: ‘’ (empty string)
example: ‘2>&1’


CRONTAB_COMMENT

used for marking the added contab-lines for removing, default value includes project name to distinguish multiple projects on the same host and user
default: ‘django-crontabs for ‘ + CRONTAB_DJANGO_PROJECT_NAME





contributors
arski cinghiale meric426 justdoit0823 chamaken


faq

I’m using this old django version (<1.8) and can’t install this package. What should i do?
- Yeah, update django of course (!) or - as you seem to be familiar with old, unsupported versions, install the old version of this package too (it support django 1.3-1.7):
pip install django-crontab==0.6.0

Will it work with windows?
- No.
I’m getting “bad command”/”errors in cronfile” while installing via “crontab add”. What’s wrong?
- Maybe it’s your cron time format, it can have 5 or 6 fields. Check that your system supports 6 or just define 5 in CRONJOBS. (see #23)



license
MIT-License, see LICENSE file.

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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