Integrating Python Poetry with Docker

Question

Can you give me an example of a Dockerfile in which I can install all the packages I need from poetry.lock and pyproject.toml into my imag

Answer 1

This is a minor revision to the answer provided by @Claudio, which uses the new poetry install --no-root feature as described by @sobolevn in his answer.

In order to force poetry to install dependencies into a specific virtualenv, one needs to first enable it.

. /path/to/virtualenv/bin/activate && poetry install

Therefore adding these into @Claudio's answer we have

FROM python:3.9-slim as base

ENV PYTHONFAULTHANDLER=1 \
    PYTHONHASHSEED=random \
    PYTHONUNBUFFERED=1

RUN apt-get update && apt-get install -y gcc libffi-dev g++
WORKDIR /app

FROM base as builder

ENV PIP_DEFAULT_TIMEOUT=100 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    PIP_NO_CACHE_DIR=1 \
    POETRY_VERSION=1.1.3

RUN pip install "poetry==$POETRY_VERSION"
RUN python -m venv /venv

COPY pyproject.toml poetry.lock ./
RUN . /venv/bin/activate && poetry install --no-dev --no-root

COPY . .
RUN . /venv/bin/activate && poetry build

FROM base as final

COPY --from=builder /venv /venv
COPY --from=builder /app/dist .
COPY docker-entrypoint.sh ./

RUN . /venv/bin/activate && pip install *.whl
CMD ["./docker-entrypoint.sh"]

If you need to use this for development purpose, you add or remove the --no-dev by replacing this line

RUN . /venv/bin/activate && poetry install --no-dev --no-root

to something like this as shown in @sobolevn's answer

RUN . /venv/bin/activate && poetry install --no-root $(test "$YOUR_ENV" == production && echo "--no-dev")

after adding the appropriate environment variable declaration.

The example uses debian-slim's as base, however, adapting this to alpine-based image should be a trivial task.