Simple docker deployment following docker best practices

[banesullivan]

The current method to bundle/deploy a trame app is too involved for a simple app. Let's say I have a simple trame app as a single Python file. How would I go about building that into a docker image via a single and standard docker build process?

The steps of building a virtual environment outside of a container then bundling that into a new image are counter to many best practices with Docker. I understand the motivation for this process, but it is too involved for most users and most examples. How can I bundle/deploy a trame app in a more standard process with a single Dockerfile and a single docker build command?

I assume this would be something like:

FROM kitware/trame

COPY myapp.py /deploy/myapp.py

... # Some trame command to run that script?

[banesullivan]

Ideally, I would like my base image to be python:3.9-slim rather than kitware/trame so that I have tighter control over the image size and Python version since the kitware/trame image does not (as far as I can tell) have tags for the python version (and using a non-tagged image like that is a bad practice)

[jourdain]

Then all the setup for multi-client will be non-existent.

[banesullivan]

Could I do something like the following?:

FROM python:3.9-slim
COPY myapp.py /deploy/myapp.py
RUN pip install trame
ENTRYPOINT ["python", "/deploy/myapp.py", "--server"]

or do I need to do some fancy things to build the launcher and and www directory?

[jourdain]

No because you bypass the launcher and multi-user setup.

[jourdain]

You can follow that example.

The code expect your app to be named app.py and any dependency to be describe inside the setup/requirements.txt.