No module named 'psycopg2' in docker container

[fwasdfw]

i build the docker image with the docker/build_and_push.Dockerfile, but it return error when i run the docker_example/docker-compose.yml , No module named 'psycopg2'

how can i solve it ???

[dosubot[bot]]

To resolve the "No module named 'psycopg2'" error, you need to ensure that the psycopg2 package is included in your dependencies and installed during the Docker build process.

1. Add psycopg2 to your pyproject.toml file:

   [tool.poetry.dependencies]
   python = "^3.12"
   psycopg2 = "^2.9.3"
   # other dependencies

2. Rebuild your Docker image using the docker/build_and_push.Dockerfile. This will ensure that psycopg2 is installed in the virtual environment created by Poetry.

The docker/build_and_push.Dockerfile already includes the necessary steps to install dependencies using Poetry:

RUN $POETRY_HOME/bin/poetry lock --no-update \
      && $POETRY_HOME/bin/poetry install --without dev --sync -E deploy -E couchbase -E cassio \
      && $POETRY_HOME/bin/poetry build -f wheel \
      && $POETRY_HOME/bin/poetry run pip install dist/*.whl

This should resolve the "No module named 'psycopg2'" error ^[1][2].

To continue talking to Dosu, mention @dosu.

[fwasdfw]

it return error now : Note: This error originates from the build backend, and is likely not a problem with poetry but with psycopg2 (2.9.9) not supporting PEP 517 builds. You can verify this by running 'pip wheel --no-cache-dir --use-pep517 "psycopg2 (==2.9.9)"'.

[dosubot[bot]]

To resolve the error related to psycopg2 not supporting PEP 517 builds and the missing pg_config when building the Docker image, you need to install the PostgreSQL development packages. These packages provide the necessary pg_config binary that psycopg2 requires to build.

You can modify the Dockerfile to include the installation of postgresql-server-dev-all which contains pg_config. Here is the updated Dockerfile:

FROM python:3.10-slim

WORKDIR /app

# Install Poetry and PostgreSQL development libraries
RUN apt-get update && apt-get install gcc g++ curl build-essential postgresql-server-dev-all -y
RUN curl -sSL https://install.python-poetry.org | python3 -
# Add Poetry to PATH
ENV PATH="${PATH}:/root/.local/bin"
# Copy the pyproject.toml and poetry.lock files
COPY poetry.lock pyproject.toml ./
# Copy the rest of the application code
COPY ./ ./

# Install dependencies
RUN poetry config virtualenvs.create false && poetry install --no-interaction --no-ansi

CMD ["uvicorn", "--factory", "langflow.main:create_app", "--host", "0.0.0.0", "--port", "7860", "--reload", "--log-level", "debug", "--loop", "asyncio"]

By adding postgresql-server-dev-all to the list of packages installed, you ensure that pg_config is available, which allows psycopg2 to build correctly ^[1][2][3].

To continue talking to Dosu, mention @dosu.