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Cronjob Supervisor

Need to have a number of workers on some server but have no access to any daemon like supervisord or the likes but can configure a minutely cronjob? This library might come in handy for you then.

  1. Installation

composer require toflar/cronjob-supervisor

  1. Create your runner.php:
<?php

require_once 'vendor/autoload.php';

use Symfony\Component\Process\Process;
use Toflar\CronjobSupervisor\BasicCommand;
use Toflar\CronjobSupervisor\Supervisor;

    $supervisor = Supervisor::withDefaultProviders('/some/directory/you/want/to/store/your/state');
    
    $supervisor->withCommand(new BasicCommand('sleep 10', 2, function () {
        return new Process(['sleep', '10']);
    }))
    ->withCommand(new BasicCommand('sleep 20', 4, function () {
        return new Process(['sleep', '29']);
    }))
    ->supervise()
;
  1. Configure the minutely cronjob

* * * * * /path/to/your/php/binary/php runner.php

That's it. The Supervisor will take care that even if your jobs are still running after a minute has passed, only ever your maximum number of processes will be created.

For this to work, it uses ps -p <pid> to check for the process details. Windows is currently not supported.