Question

要更改docker容器的依存关系，我正在运行docker-compose build。我想更新 requirements.txt 上列出的依赖项，以使其更加具体。但是每次执行此操作时，它都会重新下载并重新安装所有要求，而不是使用现有的轮子，甚至满足要求。

我是否缺少某些东西，或者这是默认情况下的行为？有没有办法改变这种行为以利用以前创建的轮子？

该项目是使用Django-Cookiecutter创建的： docker =是

这是我的 local.yml ：

version: '3'

volumes:
  local_postgres_data: {}
  local_postgres_data_backups: {}

services:
  django:
    build:
      context: .
      dockerfile: ./compose/local/django/Dockerfile
    image: cctest_local_django
    depends_on:
      - postgres
    volumes:
      - .:/app
    env_file:
      - ./.envs/.local/.django
      - ./.envs/.local/.postgres
    ports:
      - "8000:8000"
    command: /start

  postgres:
    build:
      context: .
      dockerfile: ./compose/production/postgres/Dockerfile
    image: cctest_production_postgres
    volumes:
      - local_postgres_data:/var/lib/postgresql/data
      - local_postgres_data_backups:/backups
    env_file:
      - ./.envs/.local/.postgres

Dockerfile ：

FROM python:3.6-alpine

ENV PYTHONUNBUFFERED 1

RUN apk update \
  # psycopg2 dependencies
  && apk add --virtual build-deps gcc python3-dev musl-dev \
  && apk add postgresql-dev \
  # Pillow dependencies
  && apk add jpeg-dev zlib-dev freetype-dev lcms2-dev openjpeg-dev tiff-dev tk-dev tcl-dev \
  # CFFI dependencies
  && apk add libffi-dev py-cffi \
  # Translations dependencies
  && apk add gettext \
  # https://docs.djangoproject.com/en/dev/ref/django-admin/#dbshell
  && apk add postgresql-client

# Requirements are installed here to ensure they will be cached.
COPY ./requirements /requirements
RUN pip install -r /requirements/local.txt

COPY ./compose/production/django/entrypoint /entrypoint
RUN sed -i 's/\r$//g' /entrypoint
RUN chmod +x /entrypoint

COPY ./compose/local/django/start /start
RUN sed -i 's/\r$//g' /start
RUN chmod +x /start

WORKDIR /app

ENTRYPOINT ["/entrypoint"]

有没有一种方法可以利用现有的依赖项轮子来“ docker-compose build”？

0 个答案: