Question

以下Dockerfile

FROM nvidia/cuda:10.2-devel-ubuntu18.04 AS builder

...

RUN ls $HOME/bin

FROM nvidia/cuda:10.2-runtime-ubuntu18.04

COPY --from=builder $HOME/bin/ffmpeg /usr/local/bin/ffmpeg

返回

Step 21/23 : RUN ls $HOME/bin
 ---> Running in a8dee059d9a6
ffmpeg

Removing intermediate container a8dee059d9a6
 ---> 1cb71814a43b

Step 22/23 : FROM nvidia/cuda:10.2-runtime-ubuntu18.04
 ---> e442a6c5cd9a

Step 23/23 : COPY --from=builder $HOME/bin/ffmpeg /usr/local/bin/ffmpeg
COPY failed: stat /var/lib/docker/overlay2/b9283a57527d878d76ea8f8a1e87eb1a6466e849ee1cb4bc69601e184f6dea1f/merged/bin/ffmpeg: no such file or directory

我想念什么吗？这是Docker中的错误吗？

Answer 1

您不能在$HOME操作中使用COPY（或任何环境变量）。您在本期https://github.com/moby/moby/issues/34482

中有详细信息

简单测试：

这有效：

FROM ubuntu AS builder

RUN echo "fooo" > ${HOME}/test.txt

FROM ubuntu
COPY --from=builder /root/test.txt /tmp/test.txt
RUN cat /tmp/test.txt

这不起作用，与您的错误相同：

FROM ubuntu AS builder

RUN echo "fooo" > ${HOME}/test.txt

FROM ubuntu
COPY --from=builder ${HOME}/test.txt /tmp/test.txt
RUN cat /tmp/test.txt

Docker多阶段构建：COPY --from = builder失败：没有此类文件或目录

1 个答案: