Question

是否可以在运行时获取docker容器的最大内存？

我想要实现的目标是：

public function downloadAttachment()
{       
    $id                             =   JRequest::getInt('id');

    $user                           =   JFactory::getUser();
    $model                          =   $this->getModel('Attachment');
    $item                           =   $model->getAttachment($id);
    if(!$user->guest)
    {
        echo "<p><strong>Check if you are allowed to download...</strong></p>";

        if($user->get('isRoot'))
        {
            echo "<p><strong>Preparing...</strong></p>";

            $filename = $item->filename; //Name to display
            $filepath = $item->filepath;      
            // start download now...
        }
    }
    else
    {
        echo "<p><strong>You are not allowed to download this file...</strong></p>";
    }
}

并访问docker文件中的最大内存：

docker run --memory "100m"

Answer 1

不要认为你可以在Dockerfile中指定内存约束。所以这样做的方法是在命令行覆盖entrypoint：

$ docker run -i -t --memory "100m" --entrypoint "java -Xmx`cat /sys/fs/cgroup/memory/memory.limit_in_bytes` -jar helloworld.jar" example/java-hello

在docker文件中获取内存限制？

1 个答案: