Question

我正在从Windows迁移到Unix环境的应用程序中。
经过数小时的调试，我发现了一个由信号量和www-data用户引起的问题，可能还有一些访问问题。我的新环境是：
-Debian GNU / Linux 9（stretch）（在docker中）
-Symfony 4.2中的应用
-PHP-FPM + nginx
每当请求到控制器时，都会创建一个锁：

class Controller extends AbstractController {
/** ... */
public function create(Request $request): JsonResponse
{
    $lock = $this->getLockInstance();
    if ($lock->acquire(true)) {
        try {
            $this->myService->createTicket(...);
        } catch (Exception $e) {
            return $this->handleResponse($e);
        } finally {
            $lock->release();
        }
    }
    return $this->handleResponse();
}   
protected function getLockInstance(): Lock
{
    if (SemaphoreStore::isSupported()) {
        $store = new SemaphoreStore();
    } else {
        $store = new FlockStore($this->kernel->getCacheDir());
    }
    $factory = new Factory($store);
    return $factory->createLock('lock-' . $this->getUniqueId());
}
}

我想使用Symfony Lock Component（https://symfony.com/doc/current/components/lock.html）中的SemaphoreStore类我还在我的环境php sysvsem扩展上安装了

docker-php-ext-install sysvsem

但是，当发送请求时，我的请求只是挂起而无法在app.log，nginx.log或php-errors.log中看到任何日志。调试后，我发现获取新的Semaphore锁会导致挂起问题。我在其中一个命令中具有相同的“锁定代码”，因此我以root身份运行并进行了处理。

由于我无法真正发现任何错误， 我应该将用户www-data的访问权限授予哪个目录才能访问Semaphore？

为什么PHP不会引发有关日志文件访问问题的任何错误？

我的lsof转储下面：

php-fpm   4816     root  DEL       REG                0,1           983058 /dev/zero
php-fpm   4816     root    0u      CHR                1,3      0t0  865701 /dev/null
php-fpm   4816     root    1u      CHR                1,3      0t0  865701 /dev/null
php-fpm   4816     root    2w     FIFO               0,10      0t0  982729 pipe
php-fpm   4816     root    3u      REG                8,1        0  786982 /tmp/.ZendSem.iZrHjk (deleted)
php-fpm   4816     root    4w     FIFO               0,10      0t0  982729 pipe
php-fpm   4816     root    5w     FIFO               0,10      0t0  982729 pipe
php-fpm   4816     root    6u     unix 0x0000000000000000      0t0  983059 type=STREAM
php-fpm   4816     root    7u     unix 0x0000000000000000      0t0  983060 type=STREAM
php-fpm   4816     root    8u     IPv6             983061      0t0     TCP *:9000 (LISTEN)
php-fpm   4816     root    9u  a_inode               0,11        0    8770 [eventpoll]
php-fpm   4816     root   10r     FIFO               0,10      0t0  983062 pipe
php-fpm   4816     root   11r     FIFO               0,10      0t0  983064 pipe
php-fpm   4816     root   12r     FIFO               0,10      0t0  983063 pipe
php-fpm   4816     root   14r     FIFO               0,10      0t0  983065 pipe
php-fpm   4817 www-data  cwd   unknown  /proc/4817/cwd (readlink: Permission denied)
php-fpm   4817 www-data  rtd   unknown  /proc/4817/root (readlink: Permission denied)
php-fpm   4817 www-data  txt   unknown  /proc/4817/exe (readlink: Permission denied)
php-fpm   4817 www-data    0r  unknown  /proc/4817/fd/0 (readlink: Permission denied)
php-fpm   4817 www-data    1r  unknown  /proc/4817/fd/1 (readlink: Permission denied)
php-fpm   4817 www-data    2r  unknown  /proc/4817/fd/2 (readlink: Permission denied)
php-fpm   4817 www-data    3r  unknown  /proc/4817/fd/3 (readlink: Permission denied)
php-fpm   4817 www-data    5r  unknown  /proc/4817/fd/5 (readlink: Permission denied)
php-fpm   4818 www-data  cwd   unknown  /proc/4818/cwd (readlink: Permission denied)
php-fpm   4818 www-data  rtd   unknown  /proc/4818/root (readlink: Permission denied)
php-fpm   4818 www-data  txt   unknown  /proc/4818/exe (readlink: Permission denied)
php-fpm   4818 www-data    0r  unknown  /proc/4818/fd/0 (readlink: Permission denied)
php-fpm   4818 www-data    1r  unknown  /proc/4818/fd/1 (readlink: Permission denied)
php-fpm   4818 www-data    2r  unknown  /proc/4818/fd/2 (readlink: Permission denied)
php-fpm   4818 www-data    3r  unknown  /proc/4818/fd/3 (readlink: Permission denied)
php-fpm   4818 www-data    4r  unknown  /proc/4818/fd/4 (readlink: Permission denied)
php-fpm   4818 www-data    5r  unknown  /proc/4818/fd/5 (readlink: Permission denied)
php-fpm   4818 www-data    6r  unknown  /proc/4818/fd/6 (readlink: Permission denied)
php-fpm   4818 www-data    7r  unknown  /proc/4818/fd/7 (readlink: Permission denied)
php-fpm   4818 www-data    8r  unknown  /proc/4818/fd/8 (readlink: Permission denied)
php-fpm   4818 www-data    9r  unknown  /proc/4818/fd/9 (readlink: Permission denied)
php-fpm   4818 www-data   10r  unknown  /proc/4818/fd/10 (readlink: Permission denied)

如何用Debian \ Symfony \ PHP中的www-data用户访问Sempahore内存？

0 个答案: