There’s nothing magical needed here, you can write a script that would modify 
the zone directly (and do rndc reload) or use nsupdate to modify the record 
directly in the named.

Whether it’s good idea or not... I’ll let you experience the failure of making 
decisions on the wrong layer...

Ondrej
--
Ondřej Surý — ISC (He/Him)

> On 18. 1. 2021, at 9:49, Marek Kozlowski <m.kozlow...@mini.pw.edu.pl> wrote:
> 
> :-)
> 
> I believe that such a solution (read to install) should exist. Unfortunately 
> I don't know the magic keywords to find it:
> 
> I have a group of hosts with different IPs offering the same services. I'm 
> able to install some agents on them for monitoring their network/cpu/number 
> of users/whatever utilization. I'm wondering if there is an option for BIND9 
> to obtain those load parameters on a regular basis (let's say: every 10 
> minutes) and when queried for the A record return ONLY one IP address - the 
> one of the server with the lowest utilization?
> 
> It can be implemented on those servers but in the solution I'm asking about 
> the key point is that the BIND server takes the decision.
> 
> Thanks in advance,
> best regards,
> Marek
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