[Pdns-users] [External] Notification for domains to ip1:53 failed after retries

[Arsen STASIC]

Steve,

If your powerdns is configured as master within your bind's conf for that 
zone, it will do a SOA query and if neede a zonetransfer within a second.

cheers,
-arsen

* Steve Zeng <steve.zeng at booking.com> [2018-01-17 15:43 (+0100)]:
>Klaus,
>
>Good to know. when would BIND do a SOA query to the configured master to check the serial? Is it immediately right after it get NOTIFY from master?
>
>Thanks,
>Steve
>> On Jan 17, 2018, at 3:32 PM, Klaus Darilion <klaus.mailinglists at pernau.at> wrote:
>>
>>
>>
>> Am 17.01.2018 um 15:13 schrieb Steve Zeng:
>>> Pieter,
>>>
>>> I checked BIND slaves logs around the time frame and found:
>>>
>>> 10-Jan-2018 18:11:17.211 notify: client 10.198.180.41#12149: received notify for zone 'example.com'
>>> 10-Jan-2018 18:11:17.211 general: zone lhr4.dqs.booking.com/IN: notify from 10.198.180.41#12149: no serial
>>> 10-Jan-2018 18:11:24.387 notify: client 10.198.180.41#12149: received notify for zone 'example.com'
>>> 10-Jan-2018 18:11:24.387 general: zone lhr4.dqs.booking.com/IN: notify from 10.198.180.41#12149: no serial
>>> 10-Jan-2018 18:11:29.453 notify: client 10.198.180.41#12149: received notify for zone 'example.com'
>>> 10-Jan-2018 18:11:29.453 general: zone lhr4.dqs.booking.com/IN: notify from 10.198.180.41#12149: no serial
>>> 10-Jan-2018 18:11:38.350 notify: client 10.198.180.41#12149: received notify for zone 'example.com'
>>> 10-Jan-2018 18:11:38.350 general: zone lhr4.dqs.booking.com/IN: notify from 10.198.180.41#12149: no serial
>>>
>>> wondering why there is ’no serial’ in the logs. Since the column does have the value:
>>>
>>>> select * from domains where name='example.com'\G;
>>> *************************** 1. row ***************************
>>>             id: 484
>>>           name: example.com
>>>         master: 10.187.125.2:53,10.187.125.2:53
>>>     last_check: 1516197871
>>>           type: SLAVE
>>> notified_serial: 2016918645
>>>
>>> is “no serial” the cause of notification failure?
>>
>> I do not think this is the problem. NOTIFYs may have serials, but
>> without serial is also allowed. And PowerDNS does not send serials.
>>
>> Usually, when there is no serial, Bind will do SOA-Queries to the
>> configured masters to check the serial on the master.
>>
>> regards
>> Klaus
>> _______________________________________________
>> Pdns-users mailing list
>> Pdns-users at mailman.powerdns.com <mailto:Pdns-users at mailman.powerdns.com>
>> https://mailman.powerdns.com/mailman/listinfo/pdns-users <https://mailman.powerdns.com/mailman/listinfo/pdns-users>