[Pdns-users] Multiple Backends Precedence?

[Jonathan Thorpe]

Hi Stefan,

Thank you so much for your fast reply - I'll give this a go.

Kind Regards,
Jonathan

On 30/12/10 10:01 AM, "Stefan Schmidt" <zaphodb at zaphods.net> wrote:

>On Wed, Dec 29, 2010 at 10:45:24PM +0000, Jonathan Thorpe wrote:
>> Hi All,
>
>Hi Jonathan and All,
>
>> What I'd like to achieve is this:
>> 1. Attempt to resolve the requested record from the MySQL backend.
>> 2. If a record doesn¹t exist, attempt to resolve it using the custom
>>(piped) backend.
>> 
>> I see that PDNS supports multiple backends, but it's not clear as to
>>whether or not there's some form of precedence that takes place in
>>resolving the records.
>...
>> I'd prefer to use the custom backend as the last resort for these
>>records and use the MySQL backend by default.
>
>-> http://doc.powerdns.com/modules.html
>This part of the documentation was not instantly clear to me initally
>either
>but Bert Hubert confirmed that it works just the way you'd want it.
>All the backends specified in the launch= setting are exhausted for the
>query
>exactly in the order that they are listed. The first backend to give back
>an
>answer will break that chain.
>So if you put the following in your pdns.conf:
>
>launch=gmysql:backend1,pipe:backend2
>gmysql-backend1-host=127.0.0.1
>gmysql-backend1-user=user
>gmysql-backend1-password=password
>gmysql-backend1-dbname=database
>pipe-backend2-command=/path/to/backend
>pipebackend-abi-version=2
>
>it will just do what you want.
>
>    Stefan, who is using that right now für #27c3 ;-)
>-- 
>"Those people who think they know everything are a great annoyance to
>those of
>us who do."
>- Isaac Asimov