📄 check_load.php

#!/usr/local/bin/php
<?php

$average_load = (double)shell_exec("(uptime | awk '{print $10+0}')");
$cpu_count = (int)shell_exec("nproc");


if ($average_load >= ($cpu_count * 1.5)) {

    if ($cpu_count < 4 && $average_load < 5) {
        echo "OK";
        exit(0);
    }
    
    echo "CRITICAL: Load $average_load/$cpu_count";
    exit(2);

} else {
    echo "OK: Load Average: $average_load/$cpu_count";
    exit(0);
}