[SOLVED] AWS Elastic Beanstalk execute wget in cronjob

Issue

I'm trying to run a wget command every minute that simply hits a url. I currently have the following in a file called project.config in the .ebextensions folder:

01_test_cron: command: * * * * * /usr/bin/wget -O /dev/null http://name.of.url

It currently does not execute - are there any glaring errors?

Solution

Since, Elastic Beanstalk instances auto-scale, you need to consider a few things. Does the cron run on every instance as its setup or just the leader instance? For the second option, here are the contents you should have in your project.config file:

container_commands:
    01_remove_old_cron_jobs:
        command: "crontab -r || exit 0"
    02_cronjobs:
        command: "cat .ebextensions/crontab | crontab"
        leader_only: true

The contents of the .ebextensions/crontab file would be:

* * * * * /usr/bin/wget -O /dev/null http://name.of.url

Updated on March 9, 2015

You will also need to add a blank line at the end of the project.config file as per the YAML syntax.

Answered By - Noman Ur Rehman

Answer Checked By - Marie Seifert (WPSolving Admin)