How to attach graph-tool to Django using Docker - django

Question

I need to use some graph-tool calculations in my Django project. So I started with docker pull tiagopeixoto/graph-tool and then added it to my Docker-compose file:
version: '3'
services:
db:
image: postgres
graph-tool:
image: dcagatay/graph-tool
web:
build: .
command: python3 manage.py runserver 0.0.0.0:8000
volumes:
- .:/code
ports:
- "8000:8000"
depends_on:
- db
- graph-tool
When I up my docker-compose I got a line:
project_graph-tool_1_87e2d144b651 exited with code 0
And finally when my Django projects starts I can not import modules from graph-tool, like:
from graph_tool.all import *
If I try work directly in this docker image using:
docker run -it -u user -w /home/user tiagopeixoto/graph-tool ipython
everything goes fine.
What am I doing wrong and how can I fix it and finally attach graph-tool to Django? Thanks!

Answer 1

Rather than using a seperate docker image for graphtool, i think its better to use it within the same Dockerfile which you are using for Django. For example, update your current Dockerfile:
FROM ubuntu:16.04 # using ubuntu image
ENV PYTHONUNBUFFERED 1
ENV C_FORCE_ROOT true
# python3-graph-tool specific requirements for installation in Ubuntu from documentation
RUN echo "deb http://downloads.skewed.de/apt/xenial xenial universe" >> /etc/apt/sources.list && \
echo "deb-src http://downloads.skewed.de/apt/xenial xenial universe" >> /etc/apt/sources.list
RUN apt-key adv --keyserver pgp.skewed.de --recv-key 612DEFB798507F25
# Install dependencies
RUN apt-get update \
&& apt-get install -y python3-pip python3-dev \
&& apt-get install --yes --no-install-recommends --allow-unauthenticated python3-graph-tool \
&& cd /usr/local/bin \
&& ln -s /usr/bin/python3 python \
&& pip3 install --upgrade pip
# Project specific setups
# These steps might be different in your project
RUN mkdir /code
WORKDIR /code
ADD . /code
RUN pip3 install -r requirements.pip
Now update your docker-compose file as well:
version: '3'
services:
db:
image: postgres
web:
build: .
container_name: djcon # <-- preferred over generated name
command: python3 manage.py runserver 0.0.0.0:8000
volumes:
- .:/code
ports:
- "8000:8000"
depends_on:
- db
Thats it. Now if you go to your web service's shell by docker exec -ti djcon bash(or any generated name instead of djcon), and access the django shell like this python manage.py shell. Then type from graph_tool.all import * and it will not throw any import error.