Task Scheduling in Laravel/Lumen

# Use the hash sign to prefix a comment
# +---------------- minute (0 - 59)
# |  +------------- hour (0 - 23)
# |  |  +---------- day of month (1 - 31)
# |  |  |  +------- month (1 - 12)
# |  |  |  |  +---- day of week (0 - 7) (Sunday=0 or 7)
# |  |  |  |  |
# *  *  *  *  *  command to be executed
#-----------------------------------------------------------

namespace App\Console\Commands;
 
use Illuminate\Console\Command;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\Mail;
 
class CheckLogFileSize extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'logfilesize:check';
 
    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Check the log file size daily and send email if filesize grows fast';
 
    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }
 
    /**
     * Execute the console command.
     *
     * @return mixed
     */
     public function handle()
    {
        //2019-06-05
        $today = Carbon::today()->format('Y-m-d');
        $file = storage_path('logs'). '/lumen-' . $today . '.log';
 
	       if(!file_exists($file)) exit();
 
        $size = filesize($file);
        $logsize = round($size / 1024 / 1024, 1);// in mb
 
        if($logsize >= 100){
 
          $content = $file . ' size is growing very fast, please deal with it as soon as possible.';
          $toMail  = '<a href="mailto:546131320@qq.com">546131320@qq.com</a>';
 
          Mail::raw($content, function ($message) use ($toMail, $logsize) {
              $message->subject('Warning!!!, Log file size now is ' . $logsize . 'MB');
              $message->to($toMail);
          });
 
        }
    }
}

namespace App\Console;
 
use Illuminate\Console\Scheduling\Schedule;
use Laravel\Lumen\Console\Kernel as ConsoleKernel;
 
class Kernel extends ConsoleKernel
{
    /**
     * The Artisan commands provided by your application.
     *
     * @var array
     */
    protected $commands = [
        //mail test
        Commands\SendMailCommand::class,
        Commands\CheckLogFileSize::class,
    ];
 
    /**
     * Define the application's command schedule.
     *
     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
     * @return void
     */
    protected function schedule(Schedule $schedule)
    {
        //
        $schedule->command('logfilesize:check')
                  ->everyThirtyMinutes();
    }
}

php artisan logfilesize:check  

crontab -e

* * * * * cd /path-to-your-project && php artisan schedule:run >> /dev/null 2>&1