在构建Docker映像时出错："chown:无法访问'app/csv/'：没有这样的文件或目录“

Question

我试图为python应用程序创建一个Docker映像，并获得以下错误

=> ERROR [7/9] RUN chown -R myuser:mygrp app/csv/ resources/datafeed.id                                                                                                           0.4s
------                                                                                                                                                                                  
 > [7/9] RUN chown -R myuser:mygrp app/csv/ resources/datafeed.id:                                                                                                                      
#11 0.325 chown: cannot access 'app/csv/': No such file or directory
#11 0.325 chown: cannot access 'resources/datafeed.id': No such file or directory
------
executor failed running [/bin/sh -c chown -R myuser:mygrp app/csv/ resources/datafeed.id]: exit code: 1

我的Dockerfile如下：

FROM python:3.8-slim-buster

WORKDIR app/

COPY requirements.txt .

RUN pip install -r requirements.txt

RUN groupadd -r -g 2000 mygrp && useradd -u 2000 -r -g mygrp myuser

RUN chown -R myuser:mygrp app/csv/ resources/datafeed.id

RUN chmod -R 700 app/csv/

COPY app .

USER myuser

CMD [ "python", "./main_async.py" ]

另外，我的项目结构也有以下文件：

Project-folder/app/csv
Project-folder/resources/datafeed.id

Answer 1

你的命令顺序不对。

WORKDIR app/

...

RUN chown -R myuser:mygrp app/csv/ resources/datafeed.id
RUN chmod -R 700 app/csv/

COPY app .

RUN 命令将运行容器中的任何<process>。在当前的Dockerfile中，您是尚未在容器中复制的chown-ing文件。

先做COPY。

确保将正确的参数传递给COPY，这通常应该是：

COPY <source on the host> <dest on the container>

因此，如果您正在从Project-folder目录构建：

WORKDIR app

...

# Copy files from the host into the container.
# Since `WORKDIR` is already set, this copies
# all files in the current directory on
# host to under WORKDIR
COPY . .

RUN chown -R myuser:mygrp app/csv/ resources/datafeed.id
RUN chmod -R 700 app/csv/