Simplify variables to be set

[vmcj]

We use the MySQL replication and keepalived together, if we ever have a usecase where we want to replicate the database and IP in a different way we can set that later.

I think even for the setup:

dj-primary: desktop
dj-second: desktop
dj-emerg: laptop

we would still prefer 1 variable and just not set the priority for dj-emerg so that it wouldn't start keepalived but would be setup with replication.

[eldering]

I don't understand how this is simplifying things. There's no duplicate variable removed, is there?

[vmcj]

I don't understand how this is simplifying things. There's no duplicate variable removed, is there?

I would say there is, we have both:
REPLICATION_INTERFACE used for MySQL replication and KEEPALIVED_INTERFACE used for keepalived,

The only real moments where we need those are when we test on calc{a,b} as there we have multiple interfaces, in all other situations we tend to have only 1 interface in use. The scripts did now fail as both were not documented, and I don't see a real reason to have the distinction in practice.