[Pdns-users] Wildcard record based on type

[Fernando Morgenstern]

Thanks for the tips about pipe and the option to modify the mysql query. I
will take a look.

Regarding the cache issue what i tried in the past was:

negquery-cache-ttl=0
query-cache-ttl=0
cache-ttl=0

None of these directives seem to have worked. I guess there isn't other
directives that i should change, no?


On Tue, May 14, 2013 at 5:36 PM, John Miller <johnmill at brandeis.edu> wrote:

> I don't think there's a built-in way to keep your wildcard in place, but
> also have individual TXT records for each label/subdomain.  Doing that
> definitely is contrary to standard RFC behavior, so you'd have to frontend
> your MySQL backend with something else--the pipe backend for example--if
> you wanted PowerDNS to behave like that.  In other words, you'd do
> something like
>
> launch=pipe,gmysql
>
> You could also modify the default gmysql queries (basic-query,id-query,any-
> **query, etc.) to use the wildcard if it exists.
>
> Other than for ease of management, is there a reason you can't create A
> records as well?  Without knowing your workflow, seems like if you're
> generating TXT records automatically, the A records would be equally easy
> to generate automatically, especially if they're all pointing to the same
> IP.
>
> As far as PowerDNS not "seeing" the new subdomains, double-check your
> caching layer (packet cache, regular cache, and recursive NS if it's part
> of the chain).  It's quite possible that a negative answer is getting
> cached and doesn't get flushed until after a certain interval.
>
> John
>
>
>
> On 05/14/2013 04:11 PM, Fernando Morgenstern wrote:
>
>> Hi John,
>>
>> I have a service that creates one subdomain for each account. Example:
>>
>> account1.domain.com <http://account1.domain.com>
>> account2.domain.com <http://account2.domain.com>
>>
>>
>> I have to create an A record for each subdomain. This is easy since i'm
>> using the mysql backend.
>>
>> The issue is that sometimes Powerdns won't "see" the new subdomains. I'm
>> not able to reproduce this issue easily, but even with the subdomain
>> created, it takes a while for Powerdns to serve that record properly. In
>> other words, i see it in the database, but a simple dig directly to
>> Powerdns won't return it.
>>
>> A solution that I found was to use a wildcard record. It works perfectly
>> since all subdomains point to the same IP.
>>
>> Now i also have to create TXT records ( which varies between accounts )
>> for each subdomain so the wildcard for A records stopped working and i'm
>> not sure about how to deal or fix this.
>>
>>
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