This ansible repository contains a playbook multitenant-prometheus.yml which deploys a system equivalent to the one described in this PromCon 2018 talk.
This playbook is written for a Debian GNU/Linux. If you want to run it on other systems, you will need to change parts of the roles (at least package installation via the apt module) and you will most likely have to replace the debian-role entirely.
Furthermore, there are some binaries in files/bin. These are represented as text files in this repo, containing a link to the softwares' repositories with which they have to be replaced.
The repository contains a role register_with_monitoring.
This role is not required for the setup, but is an example of how Ansible playbooks can directly register new monitoring targets to it by just including another role.