当运行 docker-compose up 我得到 python: can't open file 'manage.py': [Errno 2] No such file or directory

Question

This is my Dockerfile:

FROM python:3.6.1

# set working directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# add requirements (to leverage Docker cache)
ADD ./requirements.txt /usr/src/app/requirements.txt

# install requirements
RUN pip install -r requirements.txt

# add app
ADD . /usr/src/app

# run server
CMD python manage.py runserver -h 0.0.0.0

This is my docker-compose.yml:

version: '2.1'

services:

  users-service:
    container_name: users-service
    build: .
    volumes:
      - .:/usr/src/app
    ports:
      - 5001:5000 # expose ports - HOST:CONTAINER

This is structure of my project dir (from which I run my docker commands):

├── docker-compose.yml
├── Dockerfile
├── env
│   ├── bin
│   ├── include
│   ├── lib
│   ├── lib64 -> lib
│   ├── pip-selfcheck.json
│   ├── pyvenv.cfg
│   └── share
├── manage.py
├── project
│   ├── config.py
│   ├── __init__.py
│   └── __pycache__
└── requirements.txt

First I run docker-compose build and get following output:

Building users-service
Step 1/7 : FROM python:3.6.1
 ---> 74145628c331
Step 2/7 : RUN mkdir -p /usr/src/app
 ---> Using cache
 ---> 8b73b9540da2
Step 3/7 : WORKDIR /usr/src/app
 ---> Using cache
 ---> 28d3452f6021
Step 4/7 : ADD ./requirements.txt /usr/src/app/requirements.txt
 ---> Using cache
 ---> e92c334820c2
Step 5/7 : RUN pip install -r requirements.txt
 ---> Using cache
 ---> db7ea8211cd1
Step 6/7 : ADD . /usr/src/app
 ---> 472c303e4297
Removing intermediate container 7ee1b497cde4
Step 7/7 : CMD python manage.py runserver -h 0.0.0.0
 ---> Running in 31ae97876314
 ---> 42c79e68f692
Removing intermediate container 31ae97876314
Successfully built 42c79e68f692
Successfully tagged flaskmicroservicesusers_users-service:latest

And then I run docker-compose up which return error:

Recreating users-service
Attaching to users-service
users-service    | python: can't open file 'manage.py': [Errno 2] No such file or directory
users-service exited with code 2

What I am missing here?

Answer 1

Remove volumes from docker-compose.yml and build again.

version: '2.1'
services:
users-service:
  container_name: users-service
  build: .
  ports:
    - 5001:5000 # expose ports - HOST:CONTAINER

there is an issue with docker-compose on ubuntu. it can't mount the volume. And as I can see you want to mount . to /usr/src/app

You would need to build the image again after you update the code.

Answer 2

不要通过运行此eval $(docker-machine env <your-vm>在 docker-machine vm 中运行您的应用程序。但如果有，请通过运行eval $(docker-machine env -u)取消链接 docker-machine

Answer 3

As @Fartash said, there is a problem with mounting the folder as volume in ubuntu. In order to resolve the error you can use named volume in docker.

You can simply defining new named volume in docker-compose file as below:

version: '2.1'

services:

  users-service:
    container_name: users-service
    build: .
    volumes:
      - app:/usr/src/app # the volume is defined at the end of this file
    ports:
      - 5001:5000

volumes: # You should add this and the following line
    app: # you can define any name

for more information, you can check out this link.

Answer 4

I ran into a similar problem using docker-machine with a virtualbox driver on Ubuntu. It was due to my project's directory not being shared with the docker-machine. To fix it, cd into your project root and specify the following flag when creating your environment: --virtualbox-share-folder=="$PWD:$PWD" .

Answer 5

TLDR: I did not have any issues with ubuntu and docker-compose . It is possible that there were problems with ubuntu images previously, however, I did not find that to be accurate. Additionally, if you're using a virtual environment in a docker container, you may need to specifically tell docker-compose not to look for your virtual environment file on the host.

---

I am posting this under this question specifically because of the comments and answers about ubuntu not working correctly with docker-compose bind mounts.

For whom it may help: if you are using a virtual environment inside your docker container, and you are using bind mounts, you may need to specify to have docker-compose NOT look for your virtual environment folder. This ensures that your virtual environment inside your container has the correct packages, paths, etc.

Example dockerfile :

FROM python:3.8-slim AS BUILDER

...# omitted code

ENV USERNAME=usr
ENV HOMEDIR=/home/$USERNAME
ENV VIRTUAL_ENV=$HOMEDIR/$VENV

# ... omitted code

WORKDIR $HOMEDIR

# Create virtual environment and activate it
RUN python3 -m venv $VIRTUAL_ENV
ENV PATH="$VIRTUAL_ENV/bin:$PATH"

COPY ./requirements.txt ./requirements-dev.txt ./constraints.txt ./

# Install python dependencies
RUN pip3 install --upgrade pip --no-cache-dir \
    && pip3 install --no-cache-dir -r requirements.txt -r requirements-dev.txt -c constraints.txt \

# ... omitted code

WORKDIR $HOMEDIR

# ... omitted code

ENV PATH="$VIRTUAL_ENV/bin:$PATH"
ENV PYTHONPATH="$PYTHONPATH:/"

# ... omitted code

ENTRYPOINT [ "python3", "-u", "path/to/file/to/run" ]

example docker-compose file:

version: "3"
services:
  api:
    # ... omitted code
    build:
      context: ./
      dockerfile: Dockerfile.dev
    # ... omitted code
    volumes:
      - $PWD:/home/usr # the bind mount
      - /home/usr/venv # tell docker-compose not to look for the venv folder on the host
    ports:
      # ...omitted code
    # ...omitted code
    networks:
      - ex-network
    # ...omitted code

networks:
  ex-network:

I was able to get ubuntu and bind mounts working properly with the above configuration by executing the standard docker-compose up --build .

Answer 6

I had the same issue, below is how I finally solved it.

Original code

 services:
  db:
    image: postgres
    volumes:
      - ./data/db:/var/lib/postgresql/data
    environment:
      - POSTGRES_DB=postgres
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres

Changed the volume setting a little bit:

services:
  db:
    image: postgres
    volumes:
      - postgres-data:/var/lib/postgresql/data
    environment:
      - POSTGRES_DB=postgres
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres
volumes:
  postgres-data:
    driver: local