Docker image error: "/bin/sh: 1: [python,: not found"

Question

I'm building a new Docker image based on the standard Ubuntu 14.04 image.

Here's my Dockerfile:

FROM ubuntu:14.04 RUN apt-get update -y RUN apt-get install -y nginx git python-setuptools python-dev RUN easy_install pip ADD . /code WORKDIR /code RUN pip install -r requirements.txt # only 'django' for now ENV projectname myproject EXPOSE 80 8000 WORKDIR ${projectname} CMD ['python', 'manage.py', 'runserver', '0.0.0.0:80'] 

When I try to run this image, I get this error...

/bin/sh: 1: [python,: not found

But if I open a shell when running the image, running python opens the interactive prompt as expected.

Why can't I invoke python through CMD in the Dockerfile?

Answer 1

Use " instead of ' in CMD. (Documentation)

Answer 2

I have resolved my issue on my Mac by changing

CMD ["python", "app.py"] 

to

CMD python app.py