Configuration of Lightweight Sites Components using Ansible

Lightweight Sites is a project at CERN that enables the quick setup of new sites on the grid. Often, a lot of time is spent in setting up new sites with significant inputs from teams at CERN and at the organization operating the site. Lightweight Sites abstracts away and consolidates resources to aid the setup. To achieve this, a Lightweight Sites Specification document has been created that will allow the software configuration of the entire site through a central module. This would be the Level 1 configuration. In addition, other Lightweight Sites Components would be created according to specifications. One such component includes the repositories for containers of different compute elements (CE), batch systems, worker nodes (WN), etc. These containers are also configured and comprise the Level 2 configurations. In the past, YAIM, an in-house configuration tool has been used for Level 2 configurations. In this project, in addition to setting up Level 1 configuration, popular configuration tools like Ansible and Puppet would be used for Level 2 configuration, replacing YAIM. This migration would contribute to the project by making it easier to configure new Lightweight Sites.