forward zones with broken forwarders

Yuri yvoinov at
Tue May 8 12:09:13 UTC 2018


I've asked this. In 1.7.1 it's fixed.

08.05.2018 14:57, W.C.A. Wijngaards via Unbound-users пишет:
> Hi Florian,
> On 08/05/18 10:44, Florian Riehm via Unbound-users wrote:
>> Hi,
>> Often I see unbound configurations with multiple forwarders for zones
>> like this:
>> forward-zone:
>>     name: "."
>>     forward-addr:
>>     forward-addr:
>>     forward-addr:
>>     forward-addr:
>> The intention of customers for such configurations are redundancy purposes.
>> As long as all forwarders are reachable the configuration works well and
>> provides loadbalancing for the forwarders. But if one forwarder becomes
>> unreachable, unbound keeps asking it. Timeouts occur, many requests fail
>> and
>> dns resolution becomes very slow. This means the redundancy requirement
>> is not
>> fulfilled. I would expect that the infra cache is able to track if a
>> forwarder
>> becomes unreachable, but that seems not to be true.
>> Is there a way to configure unbound to deal with unreachable forwarders
>> in a
>> better way?
> This question was already asked by someone else, and a fix is in the
> code repository.  That will mark the forwarders as not working and
> select the working forwarders, automatically.  After a brief couple of
> timeouts to detect the failing addresses (a second, or a couple of
> seconds each).
> Best regards, Wouter
>> Thanks & Regards
>> Florian

"C++ seems like a language suitable for firing other people's legs."

* C++20 : Bug to the future *

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