friendica/src/Core/Process.php
2019-08-17 09:09:13 +02:00

204 lines
4.8 KiB
PHP

<?php
namespace Friendica\Core;
use Friendica\App;
use Friendica\Core\Config\Configuration;
use Psr\Log\LoggerInterface;
/**
* Methods for interacting with the current process or create new process
*
* @todo 2019.12 Next release, this class holds all process relevant methods based on the big Worker class
* - Starting new processes (including checks)
* - Enabling multi-node processing (e.g. for docker service)
* - Using an process-id per node
* - Using memory locks for multi-node locking (redis, memcached, ..)
*/
final class Process
{
/**
* @var LoggerInterface
*/
private $logger;
/**
* @var App\Mode
*/
private $mode;
/**
* @var Configuration
*/
private $config;
/**
* @var string
*/
private $basePath;
public function __construct(LoggerInterface $logger, App\Mode $mode, Configuration $config, string $basepath)
{
$this->logger = $logger;
$this->mode = $mode;
$this->config = $config;
$this->basePath = $basepath;
}
/**
* @brief Checks if the maximum number of database processes is reached
*
* @return bool Is the limit reached?
*/
public function isMaxProcessesReached()
{
// Deactivated, needs more investigating if this check really makes sense
return false;
/*
* Commented out to suppress static analyzer issues
*
if ($this->mode->isBackend()) {
$process = 'backend';
$max_processes = $this->config->get('system', 'max_processes_backend');
if (intval($max_processes) == 0) {
$max_processes = 5;
}
} else {
$process = 'frontend';
$max_processes = $this->config->get('system', 'max_processes_frontend');
if (intval($max_processes) == 0) {
$max_processes = 20;
}
}
$processlist = DBA::processlist();
if ($processlist['list'] != '') {
$this->logger->debug('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list']);
if ($processlist['amount'] > $max_processes) {
$this->logger->debug('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.');
return true;
}
}
return false;
*/
}
/**
* @brief Checks if the minimal memory is reached
*
* @return bool Is the memory limit reached?
*/
public function isMinMemoryReached()
{
$min_memory = $this->config->get('system', 'min_memory', 0);
if ($min_memory == 0) {
return false;
}
if (!is_readable('/proc/meminfo')) {
return false;
}
$memdata = explode("\n", file_get_contents('/proc/meminfo'));
$meminfo = [];
foreach ($memdata as $line) {
$data = explode(':', $line);
if (count($data) != 2) {
continue;
}
list($key, $val) = $data;
$meminfo[$key] = (int)trim(str_replace('kB', '', $val));
$meminfo[$key] = (int)($meminfo[$key] / 1024);
}
if (!isset($meminfo['MemFree'])) {
return false;
}
$free = $meminfo['MemFree'];
$reached = ($free < $min_memory);
if ($reached) {
$this->logger->debug('Minimal memory reached.', ['free' => $free, 'memtotal' => $meminfo['MemTotal'], 'limit' => $min_memory]);
}
return $reached;
}
/**
* @brief Checks if the maximum load is reached
*
* @return bool Is the load reached?
*/
public function isMaxLoadReached()
{
if ($this->mode->isBackend()) {
$process = 'backend';
$maxsysload = intval($this->config->get('system', 'maxloadavg'));
if ($maxsysload < 1) {
$maxsysload = 50;
}
} else {
$process = 'frontend';
$maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
if ($maxsysload < 1) {
$maxsysload = 50;
}
}
$load = System::currentLoad();
if ($load) {
if (intval($load) > $maxsysload) {
$this->logger->info('system load for process too high.', ['load' => $load, 'process' => $process, 'maxsysload' => $maxsysload]);
return true;
}
}
return false;
}
/**
* Executes a child process with 'proc_open'
*
* @param string $command The command to execute
* @param array $args Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
*/
public function run($command, $args)
{
if (!function_exists('proc_open')) {
return;
}
$cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
foreach ($args as $key => $value) {
if (!is_null($value) && is_bool($value) && !$value) {
continue;
}
$cmdline .= ' --' . $key;
if (!is_null($value) && !is_bool($value)) {
$cmdline .= ' ' . $value;
}
}
if ($this->isMinMemoryReached()) {
return;
}
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
$resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->basePath);
} else {
$resource = proc_open($cmdline . ' &', [], $foo, $this->basePath);
}
if (!is_resource($resource)) {
$this->logger->debug('We got no resource for command.', ['cmd' => $cmdline]);
return;
}
proc_close($resource);
}
}