RoadRunner provides multiple ways to safely restart worker(s) on demand. Both approaches can be used on a live server and should not cause downtime.
You are able to send stop command from worker to parent server to force process destruction. In this scenario,
the job/request will be automatically forwarded to the next worker.
We can demonstrate it by implementing max_jobs control on PHP end:
<?php
use Spiral\RoadRunner;
use Nyholm\Psr7;
include "vendor/autoload.php";
$worker = RoadRunner\Worker::create();
$psrFactory = new Psr7\Factory\Psr17Factory();
$worker = new RoadRunner\Http\PSR7Worker($worker, $psrFactory, $psrFactory, $psrFactory);
$count = 0;
while ($req = $worker->waitRequest()) {
try {
$rsp = new Psr7\Response();
$rsp->getBody()->write('Hello world!');
$count++;
if ($count > 10) {
$worker->getWorker()->stop();
return;
}
$worker->respond($rsp);
} catch (\Throwable $e) {
$worker->getWorker()->error((string)$e);
}
}
This approach can be used to control memory usage inside the PHP script.
You can also initiate a rebuild of all RoadRunner workers using embedded RPC bus:
$rpc = \Spiral\Goridge\RPC\RPC::create('tcp://127.0.0.1:6001');
$rpc->call('resetter.Reset', 'http');