We have already touched upon host variables—we saw them earlier in this chapter when we used them to override connection details such as the user account to connect with, the address to connect to, and the port to use. However, there is so much more you can do with Ansible and inventory variables, and it is important to note that they can be defined not only at the host level but also at the group level, which again provides you with some incredibly powerful ways in which to efficiently manage your infrastructure from one central inventory.
Let's build on our previous three-tier example and suppose that we need to set two variables for each of our two frontend servers. These are not special ...
