[dnsdist] dnsdist NOTIFY distribution

Rasto Rickardt phobie at axfr.org
Tue Feb 26 16:12:20 UTC 2019


for example, i am using dnsdist with hidden master scenario.

I have master for a zone that is not publicly acccessible and is
speaking directly to slaves, in your case for NOTIFY`s as well.

Slaves are used as pool for dnsdist frontend.


On 2/26/19 17:07, Martin Toth wrote:
> Hi,
> Thanks for your interest. I am using dnsdist as a loadbalancer and slave nodes are in DMZ behind dnsdist. Only dnsdist server has public IPs that can be reached from Master public IP (master is located in other datacentre).
> Is my usecase not designed well? I thought dnsdist was designed to be used as LB for DNS services. Do you have any suggestions how to solve this or what workround should I use ?
> Thanks.
> BR,
>> On 26 Feb 2019, at 16:59, Remi Gacogne <remi.gacogne at powerdns.com> wrote:
>> Hi Martin,
>> On 2/26/19 3:58 PM, Martin Toth wrote:
>>> I just want to ensure myself how NOTIFY distribution in DNSDIST
>>> exactly works. My setup looks like this - MASTER -> DNSDIST -> SLAVE
>>> PDNSs (pool of 4 nodes)
>>> My Question is if MASTER will send NOTIFY to DNSDIST, will DNSDIST
>>> redistribute these NOTIFY to all SLAVES in DNSDIST backend? How to I
>>> achieve situation that all slaves in dnsdist backend will be notified
>>> of zone change on MASTER?
>> I'm afraid you can't, dnsdist can route a query only to a single
>> backend, with the exception of the TeeAction, but I would advise against
>> trying to use it for that case.
>> Is there a reason your master doesn't speak to the slaves directly?
>> Best regards,
>> -- 
>> Remi Gacogne
>> PowerDNS.COM BV - https://www.powerdns.com/
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