Firstly, my understanding of "adns" is that it's short for
authoritative-dns; i.e. things related to our main non-recursive DNS
servers for the zones we manage. The "a" is useful to distinguish
this from any sort of other dns services we might run for CI, etc.
The way we do this is with a "hidden" server that applies updates from
config management, which then notifies secondary public servers which
do a zone transfer from the primary. They're all "authoritative" in
the sense they're not for general recursive queries.
As mentioned in Ibd8063e92ad7ff9ee683dcc7dfcc115a0b19dcaa, we
currently have 3 groups
adns : the hidden primary bind server
ns : the secondary public authoratitive servers
dns : both of the above
This proposes a refactor into the following 3 groups
adns-primary : hidden primary bind server
adns-secondary : the secondary public authoritative servers
adns : both of the above
This is meant to be a no-op; I just feel like this makes it a bit
clearer as to the "lay of the land" with these servers. It will need
some considering of the hiera variables on bridge if we merge.
Change-Id: I9ffef52f27bd23ceeec07fe0f45f9fee08b5559a
b0d27692de