>On Fri, Mar 20, 2020 at 3:14 AM David Klatt <d.kl...@sonnen.de> wrote:
>> I can't find a way to do the following although I invested plenty of time
>> in research - maybe you guys have an idea:
>>
>> With bind, I'd need to serve a single A record with 30+ IP addresses and
>> these addresses have to be returned in random order round robin,
>> which is done with:
>> Now I'd like bind to just return a random subset of e.g. 5 IP addresses
>> if someone requests this A record.
On 20.03.20 10:37, Warren Kumari wrote:
>I realize that this is the BIND list, but this sounds like an almost
>perfect example of PowerDNS's LUA record type (or something with
>CoreDNS)
>Other than that, the only thing I can think of is BIND with DLZ and a
>database that returns a random subset from a DB query, but that sounds
>awful...
On Fri, Mar 20, 2020 at 1:04 PM Matus UHLAR - fantomas <uh...@fantomas.sk>
wrote:
I don't think BIND can do this at all. And I don't think it should...
>> Reason for this are in my case some (thousands) older clients (that I can't
control)
>> that seem not being able to handle that many IPs - the OS resolver just
returns an error.
why no use IPVS-like load balancer and hide all hosts behind one or two IPs?
that would help you much more, amongst others when any of those machines
fails.
On 20.03.20 13:15, Warren Kumari wrote:
That's almost definitely the right answer, but there *are* cases where
something like what the OP was asking for - 0.pool.ntp.org springs to
mind as one example.
But, yes, a load balancer / anycast is almost definitely going to be a
better choice...
according to the OP request mentioning multiple 10.0.0.* addresses I assumes
this is not the case of IPs spread over the world but more like a server farm
providing the same services.
In that case IPVS would help.
I realize not I shouldn't have removed the IPs from my reply so it would be
more clear.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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"So does syphillis. Good thing we have penicillin." - Matthew Alton
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