[Pdns-users] [Fwd: Re: Reliable supermaster setup - howto?]
Ton van Rosmalen
ton at netbase.nl
Fri Oct 23 15:42:48 UTC 2009
Fwd to list.
-------- Originele bericht --------
Przemyslaw Wegrzyn schreef:
> Kenneth Marshall wrote:
>>> This leaves my initial question unanswered - how does such setup
>>> recover from lost notifications from supermaster to slave?
>>> As of PostgreSQL - my idea was to use PostgreSQL on master, and
>>> SQLite on slave, for simplicity, but that would render your patch
>>> useless, unfortunately. Where can I find the patch?
>> The slave will check after the cache period times out. You could
>> also run a tickle script to check that you do not have any stale
> I'm not sure if I understand things right - I'm talking about a
> situation when I add a whole new zone to the master server, and I'd
> like the slave server to add it automatically as well. The zone is not
> yet configured on the slave, so it will not ask for that. It only asks
> when notified by master. So the only way to make it reliable, I
> suppose, is to repeat the notifications form master, until a
> successful AXFR to slave occurs.
In short, it doesn't. If the packet should get lost before the slave has
the zone in its database it won't get retried until a 'pdns_control
notify <domain>' is issued on the master.
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