How can I use the Python baseline image?

Where to find the image?

Since Guilin, the Integration team builds python baseline image for the projects.

^{docker pull nexus3.onap.org:10001/onap/integration-python:latest
docker pull nexus3.onap.org:10001/onap/integration-python:7.0.0 (7 = Guilin)}

How is it built?

This baseline image is built based on the Docker file that you can find in https://git.onap.org/integration/docker/onap-python/tree/

The image is based on python:3.8.2-alpine3.11, an official python image matching SECCOM recoomendation for python and alpine.

^{It is built through a jjb associated with the integration/onap-python repository hosted in ONAP ci-management repositorty.}

How to use it in your project?

In the Docker file, 2 ONBUILD directives have been added.

Due to these ONBUILD directive, each project MUST provide a requirements.txt file before building an image derived from this baseline image.

Without this requirements.txt file, the docker built will fail.

The pip install -r requirements.txt will be executed on the build of your own image.

An example of Dockerfile consuming this base line image could be:

Your requirements.txt must be at the root of your Dockerfile and include all your required python libraries needed on the runtime of your docker.
Ideally you can indicate these dependencies as follows, you may indicate the constraints on the version and/or the associated license.

The list must be explicit (no '.')

References

official pip user guide: https://pip.pypa.io/en/stable/user_guide/