Changing supervisor processes dynamically through PHP APIs - php

Question

I have setup Supervisor, which I use to manager my worker processes.
Now, I want to dynamically change the processes (stop some processes and start new ones) through the use of PHP APIs.
I found this library which seems to be useful for what I am trying. Specifically, I am using this to change the configuration and this to manage supervisor.
I have set this library up and have the following sample code which seems to work well (from here and here)
<?php
require './vendor/autoload.php';
use Supervisor\Supervisor;
use Supervisor\Connector\XmlRpc;
use fXmlRpc\Client;
use fXmlRpc\Transport\HttpAdapterTransport;
use Ivory\HttpAdapter\Guzzle5HttpAdapter;
use Supervisor\Configuration\Configuration;
use Supervisor\Configuration\Section\Supervisord;
use Supervisor\Configuration\Section\Program;
use Indigo\Ini\Renderer;
//Create GuzzleHttp client
$guzzleClient = new \GuzzleHttp\Client(['auth' => ['user', '123']]);
// Pass the url and the guzzle client to the XmlRpc Client
$client = new Client(
'http://127.0.0.1:9001/RPC2',
new HttpAdapterTransport(new Guzzle5HttpAdapter($guzzleClient))
);
// Pass the client to the connector
// See the full list of connectors bellow
$connector = new XmlRpc($client);
$supervisor = new Supervisor($connector);
$processes = $supervisor->getAllProcesses();
foreach ($processes as $key => $processInfo) {
echo $processInfo . "\r\n";
}
try{
$supervisor->stopProcess('video_convert_02');
}
catch(Exception $e){
echo "\r\n Exception-> " . $e->getMessage();
}
$config = new Configuration;
$renderer = new Renderer;
$section = new Supervisord(['identifier' => 'supervisor']);
$config->addSection($section);
$section = new Program('test', ['command' => 'cat']);
$config->addSection($section);
echo "\r\n Config \r\n" . $renderer->render($config->toArray());
//Not sure how to use this config information to launch supervisor processes.
?>
The output to this is as follows:
pdf_convert_00
pdf_convert_01
video_convert_00
video_convert_01
video_convert_02
video_convert_03
Exception-> BAD_NAME: video_convert_02
Config
[supervisord]
identifier = supervisor
[program:test]
command = cat
I have two questions here:
I dont understand why it throws an exception, when I try to stop the process and
How do I use the config information to launch new processes?

Answer 1

I didn't use this library but "BAD_NAME" error means there is no such process with this name in your configuration.
Btw if you need only to call Supervisor API you can use SupervisorXMLRPC library. Which simply forwards your requests to the Supervisor.
$supervisor = new \Supervisor\Api('127.0.0.1', 9001, 'user', '123');
$processes = $supervisor->getAllProcessInfo();
foreach ($processes as $processInfo) {
print_r($processInfo);
}
try {
$supervisor->stopProcess('video_convert_02');
}
catch (\Supervisor\ApiException $e){
echo "\r\n Exception-> " . $e->getMessage();
}