How to specify server id in Ansible?

Question

Python

I have several replicas.
In configs it is necessary to specify something like
sever-id = 1.
Each host has its own id.
Well, i.e. depending on ip or in some other way.

Answer 1

Create a server_id variable, for example, and define this variable for each host in the inventory file.

Answer 2

It's easier then to pull the server number in the group