Ansible is a powerful datacenter automation tool that enables nearly declarative automations - "Ansible playbooks, ansible-galaxy, roles and collections" is a primer with Ansible, gradually introducing concepts that we better elaborate in other posts following this one: as we already said, Ansible is a powerful tool, and as many powerful tool can make more pain than benefits if improperly managed - the aim of this post is providing a good baseline that enable quickly enable operating Ansible running ad hoc statements, playbooks and operating using Ansible Galaxy with shelf roles and collections .

This post begins where we left with the "Ansible Tutorial – Ansible Container How-To" post, writing a playbook for preparing hosts for being managed by Ansible, learning how to use Ansible Galaxy for downloading and installing shelf Ansible roles and collections. The outcome will be a running PostgreSQL instance we will use as the DB engine in the next post of the series..