Packer: provide tools and CI templates to build images

The EOLE/eole-3/infra/builder> is growing and we want to split it in several project, each one responsible to build it's own images.

We need

• A templates/Packer.yaml to define the CI job templates, building an image based on some variables
  • the OS
  • the OS_VERSION
  • the TARGET
  • the IMAGE_NAME which will be built
• A bin/one-publish tool to expose images to OpenNebula until this could be done natively by OpenNebula tooling

The use

Each project .gitlab-ci.yml will include the templates/Packer.yaml and define the required jobs.

The project must have the packer directories recipes, provisionning, etc.