Docker-compose不反映Requirements.txt中的更改

Question

在我的变化requirements.txt，当我运行没有被体现出来：

docker-compose -f docker-compose-dev.yml up -d

docker-compose-dev.yml

version: '3.6'

services:

  web:
    build:
      context: ./services/web
      dockerfile: Dockerfile-dev
    volumes:
      - './services/web:/usr/src/app'
    ports:
      - 5001:5000
    environment:
      - FLASK_ENV=development
      - APP_SETTINGS=project.config.DevelopmentConfig
      - DATABASE_URL=postgres://postgres:postgres@web-db:5432/web_dev 
      - DATABASE_TEST_URL=postgres://postgres:postgres@web-db:5432/web_test  
    depends_on:  
      - web-db

  web-db:  
    build:
      context: ./services/web/project/db
      dockerfile: Dockerfile
    ports:
      - 5435:5432
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres

  nginx:
    build:
      context: ./services/nginx
      dockerfile: Dockerfile-dev
    restart: always
    ports:
      - 80:80
    depends_on:
      - web
      - client

  client:
    build:
      context: ./services/client
      dockerfile: Dockerfile-dev
    volumes:
      - './services/client:/usr/src/app'
      - '/usr/src/app/node_modules'
    ports:
      - 3007:3000
    environment:
      - NODE_ENV=development
      - REACT_APP_WEB_SERVICE_URL=${REACT_APP_WEB_SERVICE_URL}
    depends_on:
      - web

Dockerfile开发

# base image
FROM python:3.6-alpine

# install dependencies
RUN apk update && \
    apk add --virtual build-deps gcc python-dev musl-dev && \
    apk add libffi-dev && \
    apk add postgresql-dev && \
    apk add netcat-openbsd && \
    apk add bind-tools && \
    apk add --update --no-cache g++ libxslt-dev && \
    apk add jpeg-dev zlib-dev

ENV PACKAGES="\
    dumb-init \
    musl \
    libc6-compat \
    linux-headers \
    build-base \
    bash \
    git \
    ca-certificates \
    freetype \
    libgfortran \
    libgcc \
    libstdc++ \
    openblas \
    tcl \
    tk \
    libssl1.0 \
    "

ENV PYTHON_PACKAGES="\
    numpy \
    matplotlib \
    scipy \
    scikit-learn \
    nltk \
    " 

RUN apk add --no-cache --virtual build-dependencies python3 \
    && apk add --virtual build-runtime \
    build-base python3-dev openblas-dev freetype-dev pkgconfig gfortran \
    && ln -s /usr/include/locale.h /usr/include/xlocale.h \
    && python3 -m ensurepip \
    && rm -r /usr/lib/python*/ensurepip \
    && pip3 install --upgrade pip setuptools \
    && ln -sf /usr/bin/python3 /usr/bin/python \
    && ln -sf pip3 /usr/bin/pip \
    && rm -r /root/.cache \
    && pip install --no-cache-dir $PYTHON_PACKAGES \
    && pip3 install 'pandas<0.21.0' \
    && apk del build-runtime \
    && apk add --no-cache --virtual build-dependencies $PACKAGES \
    && rm -rf /var/cache/apk/*

# set working directory
WORKDIR /usr/src/app

# add and install requirements
COPY ./requirements.txt /usr/src/app/requirements.txt  # <--- refer to EDIT
RUN pip install -r requirements.txt

# add entrypoint.sh
COPY ./entrypoint.sh /usr/src/app/entrypoint.sh

RUN chmod +x /usr/src/app/entrypoint.sh

# add app
COPY . /usr/src/app

# run server
CMD ["/usr/src/app/entrypoint.sh"]

我想念什么？

编辑

就像[ Docker中的接受答案一样，仅当发生更改时，如何运行pip requirements.txt？，在将整个应用程序添加到映像中之前，我已经requirements.txt在一个单独的构建步骤中复制了该文件，但是它似乎不起作用。

Answer 1

我认为问题可能是$ docker-compose up如果您进行更改，单独不会重建您的图像。为了将docker-compose您的更改包含在内，您requirements.txt需要将--build标志传递给docker-compose.

即运行：

docker-compose -f docker-compose-dev.yml up --build -d

这将强制docker-compose重建图像。但是，这将重建docker-compose文件中可能需要也可能不需要的所有图像。

如果您只想重建单个服务的映像，您可以先运行docker-compose -f docker-compose-dev.yml build web，然后再运行您的原始docker-compose命令。

有关build命令的更多信息here。