Running Laravel Horizon on shared hosting via CRON - laravel

Question

I am running an application build on Laravel 8. This application handles heavy loads of jobs. That is why my queues are stored in Redis and handled by Laravel Horizon.
Since I am on shared hosting, I have no access to Supervisord (or to any process manager).
I am asking the community because I was unable to find any advice or recommendation on the preferred configuration for my case.
CRON
* * * * * php artisan schedule:run >/dev/null 2>&1
Console / Kernel.php
$schedule->command('horizon')->everyMinute()->withoutOverlapping();
What is the preferred method of keeping Horizon alive via CRON?
What is the preferred method to prevent Horizon duplicate processes (and to prevent memory leaks)?

Answer 1

Since you can run cron jobs, you could create a file 'start_horizon.php':
<?php declare(strict_types=1);
$res = shell_exec("php artisan horizon:status");
if($res !== "Horizon is running.\n") {
echo "horizon is not running, starting it\n";
$fp = popen("php artisan horizon", "r");
while (!feof($fp)) {
$buffer = fgets($fp, 4096);
echo $buffer;
}
echo "horizon was terminated\n";
pclose($fp);
} else {
echo "horizon is running\n";
}
and call it from cron every minute or so. This script will check if horizon is running. If horizon running, it will exit. If horizon is not running, it will start horizon.
The cron line should look like this:
* * * * * cd /your/laravel/dir/ && php start_horizon.php >> /dev/null
It is needed to run this script in a directory where artisan is available.