Override vars?

[hsh-it]

Hello, I got the request that I should use a playbook in which all roles are executed that should be used for the system or the category of systems.

My idea is that I have a playbook (docker, nginx) and define variables in the playbook that should be used for the server.

Is that possible? How would it be practical? playbook_1 installs e.g. nginx with ports x,y,z and the hostname server one

playbook_2 just installs with the hostname server two

etc. Does that work?