PHP守护程序/工作人员环境 [英] PHP Daemon/worker environment

问题描述

问题:我想实现几个php-worker进程，这些进程正在MQ服务器队列上侦听异步作业.现在的问题是，简单地在服务器上以守护程序的形式运行此进程并不能真正赋予我对实例的任何级别的控制(负载，状态，锁定)……除非可能是转储ps -aux. 因此，我正在寻找某种可以在系统(进程)级别或更高层(某种Java风格的应用服务器)上监视和控制实例的运行时环境

Problem: I want to implement several php-worker processes who are listening on a MQ-server queue for asynchronous jobs. The problem now is that simply running this processes as daemons on a server doesn't really give me any level of control over the instances (Load, Status, locked up)...except maybe for dumping ps -aux. Because of that I'm looking for a runtime environment of some kind that lets me monitor and control the instances, either on system (process) level or on a higher layer (some kind of Java-style appserver)

有指针吗?

推荐答案

以下是一些有用的代码.

Here's some code that may be useful.

<?
define('WANT_PROCESSORS', 5);
define('PROCESSOR_EXECUTABLE', '/path/to/your/processor');
set_time_limit(0);
$cycles = 0;
$run = true;
$reload = false;
declare(ticks = 30);

function signal_handler($signal) {
    switch($signal) {
    case SIGTERM :
        global $run;
        $run = false;
        break;
    case SIGHUP  :
        global $reload;
        $reload = true;
        break;
    }   
}

pcntl_signal(SIGTERM, 'signal_handler');
pcntl_signal(SIGHUP, 'signal_handler');

function spawn_processor() {
    $pid = pcntl_fork();
    if($pid) {
        global $processors;
        $processors[] = $pid;
    } else {
        if(posix_setsid() == -1)
            die("Forked process could not detach from terminal\n");
        fclose(stdin);
        fclose(stdout);
        fclose(stderr);
        pcntl_exec(PROCESSOR_EXECUTABLE);
        die('Failed to fork ' . PROCESSOR_EXECUTABLE . "\n");
    }
}

function spawn_processors() {
    global $processors;
    if($processors)
        kill_processors();
    $processors = array();
    for($ix = 0; $ix < WANT_PROCESSORS; $ix++)
        spawn_processor();
}

function kill_processors() {
    global $processors;
    foreach($processors as $processor)
        posix_kill($processor, SIGTERM);
    foreach($processors as $processor)
        pcntl_waitpid($processor);
    unset($processors);
}

function check_processors() {
    global $processors;
    $valid = array();
    foreach($processors as $processor) {
        pcntl_waitpid($processor, $status, WNOHANG);
        if(posix_getsid($processor))
            $valid[] = $processor;
    }
    $processors = $valid;
    if(count($processors) > WANT_PROCESSORS) {
        for($ix = count($processors) - 1; $ix >= WANT_PROCESSORS; $ix--)
            posix_kill($processors[$ix], SIGTERM);
        for($ix = count($processors) - 1; $ix >= WANT_PROCESSORS; $ix--)
            pcntl_waitpid($processors[$ix]);
    } elseif(count($processors) < WANT_PROCESSORS) {
        for($ix = count($processors); $ix < WANT_PROCESSORS; $ix++)
            spawn_processor();
    }
}

spawn_processors();

while($run) {
    $cycles++;
    if($reload) {
        $reload = false;
        kill_processors();
        spawn_processors();
    } else {
        check_processors();
    }
    usleep(150000);
}
kill_processors();
pcntl_wait();
?>

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