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I'm having trouble getting my cron jobs to execute.
Setup:
Django - 1.9
Elastic beanstalk - 64bit Amazon Linux 2016.03 v2.1.3 running Python 3.4
I've tried doing this a couple of ways so far:
Using a cron.yaml file: Didn't touch anything else - just added a cron.yaml file to my project root folder
version: 1
cron:
- name: "test"
url: "http://website.com/workers/test"
schedule: "*/10 * * * *"
Using a container command and a separate cron.txt file:
Added this line in my .ebextensions/development.config file
05_some_cron:
command: "cat .ebextensions/crontab.txt > /etc/cron.d/crontab && chmod 644 /etc/cron.d/crontab"
leader_only: true
and in .ebextensions/crontab.txt
*/10 * * * * source /opt/python/run/venv/bin/activate && python mysite/manage.py test
The app deploys successfully in both cases.
source /opt/python/run/venv/bin/activate && python mysite/manage.py test as a management command runs the correct script once on deploying.The logs do not show any GETS on that url.
What am I doing wrong? Am I missing some step of the process or some setup step on EBS?
Also what is the best ways to run cron jobs for django applications hosted on EBS? - django apps can run management commands either from the command line as in attempt 2 or by extending a GET or POST url as in attempt 1.
926
Steps to setup a cron job in Django Create a file anywhere within your django's project according to your module directory structure for e.g. myapp/cron.py and define the function which you want to be executed automatically via cron. This will be your cron job. We define a cron just as above.
Elastic Beanstalk isn't great if you need a lot of environment variables. The simple reason is that Elastic Beanstalk has a hard limit of 4KB to store all key-value pairs. The environment had accumulated 74 environment variables — a few of them had exceedingly verbose names.
The cron reads the crontab (cron tables) for running predefined scripts. By using a specific syntax, you can configure a cron job to schedule scripts or other commands to run automatically.
2018 Update using Django 2.0.6 + AWS ElasticBeanstalk + Cronjob
I found I needed to export the AWS environment variables using source /opt/python/current/env to prevent manage.py from throwing the error "The SECRET_KEY setting must not be empty".
This is because I had placed my Django Secret key in the os.environ for beanstalk which it seems is not accessible by shell/cron by default.
See https://forums.aws.amazon.com/thread.jspa?threadID=108465
My final cron job .txt script was as follows. (process_emails is my own django management function, myjob.log is where the output of the function call is logged).
*/15 * * * * source /opt/python/run/venv/bin/activate && cd /opt/python/current/app/ && source /opt/python/current/env && python manage.py process_emails >> /var/log/myjob.log 2>&1
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