[英]Dockerfile: can't open file './main.py': [Errno 2] No such file or directory
I get this error: python: can't open file '/src/main.py': [Errno 2] No such file or directory
when I try to run a container with an image that was build with the following docker file:我收到此错误: python: can't open file '/src/main.py': [Errno 2] No such file or directory
:
FROM python:3.9-slim AS compile
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
WORKDIR /my-app
COPY requirements.txt .
RUN pip install -r requirements.txt
ADD src/ ./src
RUN pip install .
FROM python:3.9-slim AS build
COPY --from=compile/opt/venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
CMD ["python", "/src/main.py"]
I tried this as well and it still gives me the same type of error about not finding the main.py: i tried./src/main/py, /src/main.py, /src/main.py, ./main.py.我也试过这个,但它仍然给我同样类型的关于找不到 main.py 的错误:我试过./src/main/py、/src/main.py、/src/main.py、./main .py。 I tried everything, I'm starting to suspect the error is elsewhere我尝试了一切,我开始怀疑错误在其他地方
/src/main.py
is absolute path from the system root. /src/main.py
是系统根目录的绝对路径。
In order to be relative to you current directory use ./src/main.py
为了与您当前目录相关,请使用./src/main.py
I would simplify your docker file as below:我会简化你的 docker 文件如下:
# base image
FROM amazonlinux:1
# Set the working directory
WORKDIR /app
# Copy the current directory contents into the container at /app
COPY . /app
# Install requirements
RUN pip install -r requirements.txt
# Define environment variable
ENV PYTHONPATH "${PYTHONPATH}:/app"
# Run main.py when the container launches
ENTRYPOINT ["python", "-u", "src/main.py"]
The problem is you have multistaged build (2x FROM) and you only add them to the first stage.问题是您有多阶段构建(2x FROM)并且您只将它们添加到第一阶段。
FROM python:3.9-slim AS compile
[..]
ADD src/ ./src
ADD setup.py .
RUN pip install .
FROM python:3.9-slim AS build
[..]
You can fix this with a second COPY --from=
statement in the 2. stage.您可以在 2. 阶段使用第二个COPY --from=
语句来解决此问题。 Additionally your CMD is wrong.此外,您的 CMD 是错误的。 Either give it the fullpath or start a relative path with a.要么给它完整路径,要么用 a 开始一个相对路径。 the dir-/filename ( /my-app/src/main.py
, ./src/main.py
, src/main.py
).目录/文件名( /my-app/src/main.py
, ./src/main.py
, src/main.py
)。
FROM python:3.9-slim AS compile
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"
WORKDIR /my-app
COPY requirements.txt .
RUN pip install -r requirements.txt
ADD src/ ./src
ADD setup.py .
RUN pip install .
FROM python:3.9-slim AS build
COPY --from=compile/opt/venv /opt/venv
COPY --from=compile/my-app /my-app # ADDED
WORKDIR /my-app # ADDED
ENV PATH="/opt/venv/bin:$PATH"
CMD ["python", "/my-app/src/main.py"] # FIXED
Lastly, you're only setting the workdir in the stage you throw away, but that's only relevant if you don't give the cmd the full path or you need a specific workdir.最后,您只是在丢弃的阶段设置工作目录,但这仅在您没有为 cmd 提供完整路径或者您需要特定的工作目录时才有意义。
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