adding zone forwards without restart

[Philippe.Simonet at swisscom.com]

Hi

and after a forward add a rndc flush can help too ..

philippe

-----Original Message-----
From: bind-users [mailto:bind-users-bounces at lists.isc.org] On Behalf Of Matus UHLAR - fantomas
Sent: Wednesday, September 21, 2016 10:03 AM
To: bind-users at lists.isc.org
Subject: Re: adding zone forwards without restart

>> On 2016-09-21 02:40, Frank Even wrote:
>>> Is there a way to add forwarders for specific zones without a restart?
>>>  Everything I've read seems to indicate an "rndc reconfig" or an 
>>> "rndc reload" should take care of this, but they do not.  I add 
>>> forwarders to "named.conf" and neither will load the new forwarded 
>>> zone until I do a full daemon restart.

On 20.09.16 19:44, Frank Even wrote:
>The basics are fine.  BIND just doesn't load newly added forwarded 
>zones, period.  It also kind of lies in the output:

the reconfig SHOULD cause bind reload the configuration.
the reload SHOULD cause bind reload the zones.

if it does not, it's probably a bug.

for forwarding zones, reconfig should be enough.

I guess, if the configuration is invalid, the old one should keep being used. 
>Sep 20 17:57:48 host01 named[26453]: reloading configuration succeeded 
>Sep 20 17:57:48 host01 named[26453]: any newly configured zones are now 
>loaded
>
>...except they're not.  Thus far I think the only condition I've 
>actually seen BIND load new zones without a restart after being added 
>to named.conf is if it's not already authoritative for a lower level 
>part of a domain and you're adding an authoritative zone.

Bind checks for zone file timestamps, although files do not apply for forwarding zones, so they are also not loaded, because queries for them are of course being forwarded (or recursed, if they are set to "forward first" and the forwarders do not answer).

>Even adding another master zone that is higher up in the hierarchy will 
>not load until a full restart I've found (meaning you have "domain.com"
>configured as a master zone and add "subdomain.domain.com" as a master 
>zone as well).

so, do you have problems with forwarding zones or master zones?

Did you run named-checkconf as Benny advised?
Did you run named-checkzone for the newly added zones?

--
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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