Docker Linux 容器 Kernel 更新

Question

我创建了 linux ubuntu 容器，我厌倦了运行 python 脚本。

但它引发了这个错误：

<frozen importlib._bootstrap>:228: RuntimeWarning: Linux supports fsync/fdsync with io_submit since 4.18 but current kernel 4.15.0-55-generic doesn't support it. Related calls will have no effect.

如何更新 docker 容器内的 ubuntu kernel？

有dockerfile：

FROM ubuntu:21.04
RUN apt-get update -y
RUN apt-get upgrade -y
RUN apt-get dist-upgrade -y

RUN apt-get install python3.9 -y
RUN apt-get install python3-pip -y

Answer 1

You cannot upgrade kernel inside docker container - the whole point of using Docker containers in contrary to virtualization is that you use the same kernel that your underlying OS does. 您必须升级您的操作系统 kernel 才能解决此问题。