Setting up cron for a custom module what I believe I need to do is create a \etc\crontab.xml for the module.

What I also believe is happening is when the cron job magento cron:run runs all jobs in the table cron_schedule are executed (as long as time <= scheduled_at).

If this is correct, how does my job run_my_module for my custom module (my\module) get in cron_schedule? I've run magento cron:run manually but don't see my job in the table. What am I missing?

2 Answers 2


Schedule is generated periodically during magento cron:run execution. Period is defined separately for each cron group in the admin panel (Stores -> Configuration -> Advanced -> System -> Cron). New job will be scheduled only when Generate Schedules Every minutes pass after previous generation.

Implementation can be found here \Magento\Cron\Observer\ProcessCronQueueObserver::_generate

  • Thanks @Alex! My group id is "default" and I see 2 settings for "Cron configuration options for group: default"; 1) "Generate Schedules Every" and 2) "Schedule Ahead for". Does "Generate Schedules Every" mean every time "magento cron:run" executes, it won't create a schedule for each job until after this "time"? Meaning if "Generate Schedules Every = 15", then a job won't be scheduled until 15 minutes has past?
    – user20719
    Dec 30, 2015 at 18:52
  • Yes. Until 15 minutes have passed after the latest schedule generation. Dec 30, 2015 at 19:14

Follow these steps:

Create crontab.xml file in your custom module - app/code/Magenticians/Mymodule/etc and paste the following code in it:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Cron:etc/crontab.xsd">
<group id="default">
<job name="cron_name" instance="Magenticians\Mymodule\Cron\Run" method="execute">
<schedule>*/1 * * * *</schedule>-->

Now Create Run.php file in app/code/Magenticians/Mymodule/Cron and paste this code in it:

class Run 
   protected $_logger;
   public function __construct(
       \Psr\Log\LoggerInterface $logger
     $this->_logger = $logger;

   public function execute()
       //Edit it according to your requirement
       $this->_logger->debug('Cron run successfully');
       return $this;

Go to Root directory using SSH and run the following commands:

php bin/magento cache:flush
php bin/magento cron:run

Go to var/log/debug.log and you will see the text Cron run successfully in it.

  • Can possible to schedule cron without 'php bin/magento cron:run'? I use default group for my custom cron. May 17, 2018 at 10:39

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