Shell scripting inside Docker Compose?

Enterprise
1

My company has a use case in which we are trying to build a Django REST API and then use CI using Travis. When changes are pushed to GitHub using git stash pop.

I am also using Docker to build and Docker-Compose to scale my services. The problem is, is I want to run pyTest and Flake8 when I push my changes to GitHub. Now I have not added any test, hence the pyTest command is giving an exit status of 5.

#!/bin/bash

pytest;
err=$? ;
if (( $err != 5 )) ;
then
  exit $err;
fi
flake8 ;

But I can’t get Compose to run this. When I run the script using the following:

docker-compose run app sh -c "run_script.sh"

Here’s my Compose file:


services:
  app:
    build:
      context: .
    ports:
      - "8000:8000"
    volumes:
      - ./app:/app
    command: >
      sh -c "python manage.py runserver 0.0.0.0:8000"

Here’s the Dockerfile:


MAINTAINER NAME

ENV PYTHONUNBUFFERED 1

COPY Pipfile* /tmp/

RUN cd /tmp && pip install pipenv && pipenv lock --requirements > requirements.txt

RUN pip install -r /tmp/requirements.txt

RUN mkdir /app

WORKDIR /app

COPY ./app /app

RUN adduser -D user
USER user

This should be a simple issue but I cannot figure out how to get around this. Sorry for posting twice tonight, this is just baffling me.

2

Hello again @Eclipse,

Your script isn’t working because Alpine base images don’t have GNU bash. Seems like you’re running your bash script prematurely. I’ve seen a topic like this similar before.

In the context of a CI system, it is extremely important to remove the volumes: line that mounts a local directory over your container’s /app directory: in the build instructions, you can see why it would cause problems specifically in Docker Compose.

In a real world environment (and say not like a school) I’d personally suggest running both of these tools in a non-Docker environment. Via the Docker syntax you can ideally setup your unit tests without hard-to-setup context like a database container as well.

FYI: I’d also run further tests based on network calls into the container.

-Montana

1 Like
3

I appreciate the help tonight Montana… This was helpful, especially the network calls into the container. Thanks you again…

4

Yeah no problem anytime you need help or know of anyone that needs help, please point them to this forum, and I’ll gladly help them.

-Montana