docker platform pre_build_image

[daurrutia]

For the sake of a general newb, can you guys share and clarify in just one to two sentences what pre_build_image and Build an Ansible compatible image (new) work to do and when would someone want to use it?

[lksnmnn]

You are able to specify a pre-build docker image which has all required dependencies (ansible, etc.) already installed. So Molecule just fetches it from a registry. For example, see the images from geerlingguy:

• https://github.com/geerlingguy/docker-ubuntu1804-ansible
• https://github.com/geerlingguy/docker-debian10-ansible

Alternatively, you are able to configure your own Dockerfile (or Dockerfile.j2 template) and Molecule will build and use it for running your tests.