无法使用前端 dockerfile.v0 解决：无法创建 LLB 定义：无法执行请求：运行 docker build 时出现头错误

Question

我有以下 Dockerfile：

FROM alpine:latest

COPY . .

# C-CPP
RUN apk update \
&& apk add build-base \
&& apk add g++

# JAVA 8
RUN apk fetch openjdk8 \
&& apk add openjdk8
ENV JAVA_HOME=/usr/lib/jvm/java-1.8-openjdk
ENV PATH="$JAVA_HOME/bin:${PATH}"

# Python 3
RUN apk add python3 py3-pip \
&& apk add --upgrade bash

RUN ["chmod", "+x", "./run.sh"]
ENTRYPOINT [ "./run.sh" ]

当我点击 command 时docker build -t dockerfile .，我收到此错误 - 这是什么意思以及如何修复它？

> [+] Building 28.2s (3/3) FINISHED  => [internal] load build definition
> from Dockerfile                                    1.3s
> => => transferring dockerfile: 32B                 0.2s
  => [internal] load .dockerignore                   1.6s
  => => transferring context: 2B                     0.1s
  => ERROR [internal] load metadata for docker.io/library/alpine:latest      26.5s 
> ------
>  > [internal] load metadata for docker.io/library/alpine:latest:
> ------ 
failed to solve with frontend dockerfile.v0: failed to create LLB definition: failed to do request: Head
> "https://registry-1.docker.io/v2/library/alpine/manifests/latest": di

al tcp 52.200.78.26:443：I/O 超时

Answer 1

这显然是网络超时问题。没有语法错误，共享 dockerfile 工作正常。

如何验证网络问题：是否有curl工具

curl -v https://registry-1.docker.io/v2/library/alpine/manifests/latest

卷曲的输出

或者直接在浏览器中输入

https://registry-1.docker.io/v2/library/alpine/manifests/latest