docs: clarify geoip service health checks uses lua records

The geoip backend documentation mentions:

> Additionally, the GeoIP backend can be used to provide service over
> several clusters, any of which can be taken out of use easily, for
> example for maintenance purposes.

But no details on how that is achieved. Without knowing Lua records
exist, it's hard to find how to do it.

Add a reference to the Lua records documentation to make it easier to
see the connection.

Signed-off-by: Kevin Daudt <me@ikke.info>

diff --git a/docs/backends/geoip.rst b/docs/backends/geoip.rst
index 4f358bbe5ced116674414c19801c828715c92007..5f958597dfadf5fd15e2b4e62b750d0d7cd74c25 100644 (file)
--- a/docs/backends/geoip.rst
+++ b/docs/backends/geoip.rst
@@ -23,9 +23,9 @@ This backend (which is a.k.a. the YAML backend) allows visitors to be sent to a
 no appreciable delay, as would otherwise be incurred with a protocol
 level redirect. Additionally, the GeoIP backend can be used to provide
 service over several clusters, any of which can be taken out of use
-easily, for example for maintenance purposes. This backend can utilize
-EDNS Client Subnet extension for decision making, if provided in query
-and you have turned on
+easily, for example for maintenance purposes, by using :doc:`Lua records <../lua-records>`.
+This backend can utilize EDNS Client Subnet extension for decision
+making, if provided in a query and you have turned on
 :ref:`setting-edns-subnet-processing`.
 
 Prerequisites