## Inventory

Your inventory of hosts are your raw material. They are a list of nodes and associated meta data that Ansible can automate.

Inventory lists can be built and stored several different ways, including static files, or can be dynamically-generated from an external source.

You can also specify variables as part of an inventory list. For instance, set a particular host key that’s needed to log into that system remotely. Inventories are ultimately lists of things you want to automate across.

Here in this slide was see an example of a simple static inventory list of three hosts (webserver1, webserver2 and dbserver1) in two groups (web and db).

For more details see the Inventory page in the Ansible documentation.