从 docker-compose 运行应用程序时出现 ModuleNotFoundError 错误。 我该如何解决这个问题？

Question

I got following error while running from docker-compose but it works fine when I run docker run . Can some body help me to debug this. Error:

File "/home/desktop/.local/bin/docker-compose", line 5, in <module>
    from compose.cli.main import main
  File "/usr/lib/python3.10/site-packages/compose/cli/main.py", line 19, in <module>
    from ..config import ConfigurationError
  File "/usr/lib/python3.10/site-packages/compose/config/__init__.py", line 3, in <module>
    from .config import ConfigurationError
  File "/usr/lib/python3.10/site-packages/compose/config/config.py", line 48, in <module>
    from .validation import match_named_volumes
  File "/usr/lib/python3.10/site-packages/compose/config/validation.py", line 8, in <module>
    from jsonschema import Draft4Validator
  File "/usr/lib/python3.10/site-packages/jsonschema/__init__.py", line 21, in <module>
    from jsonschema._types import TypeChecker
  File "/usr/lib/python3.10/site-packages/jsonschema/_types.py", line 3, in <module>
    from pyrsistent import pmap
ModuleNotFoundError: No module named 'pyrsistent'

My Dockerfile:

FROM python:3.9-alpine
ENV PYTHONUNBUFFERED=1
RUN apk update \
    && apk add --no-cache --virtual .build-deps
RUN pip install --upgrade pip
ENV APP_DIR /home/myapp
WORKDIR ${APP_DIR}
ADD requirements.txt ${APP_DIR}/
RUN pip install -r ${APP_DIR}/requirements.txt
COPY . .
EXPOSE 8000
ENTRYPOINT sh -c "python manage.py runserver 0.0.0.0:8000"

my docker compose file:

version: "3.9"
services:
  web:
    build: 
      context: .
    volumes:
      - .:/home/myapp
    ports:
      - "8000:8000"
    command: python manage.py runserver 0.0.0.0:8000
    container_name: django_myapp
    restart: always
    env_file: .env

While I run docker-compose build I get above error. I have Tried adding pyrsistent in requirements.txt but error is still same. How to solve this error??

Answer 1

This is a common Python error stack, you need to have some basic knowledge of Python to understand it, but I'll try to explain it briefly here.

The error starts with /home/desktop/.local/bin/docker-compose which means it comes from docker-compose on the host machine, not from inside Docker . The call stack indicates a compose -> jsonschema -> pyrsistent call path and pyrsistent is not found ( ModuleNotFoundError ), which means there's a missing dependency on your host machine.

Try pip3 install docker-compose --user and pip3 install pyrsistent --user :

1. /home/desktop/.local/bin/docker-compose indicates your compose was installed to your home directory instead of the system path, so use --user to try a local installation.
2. If everything works fine, pip3 install docker-compose --user will resolve the whole dependency tree and install pyrsistent automatically.
3. If it doesn't work, try the second command to manual fix pyrsistent package.
4. If it still fails, try pip3 install --force-reinstall --user pyrsistent to reinstall pyrsistent package.