[dns-operations] Update: Problem in Costa Rica 14 Sept.
Warren Kumari
warren at kumari.net
Tue Sep 27 13:35:46 UTC 2011
On Sep 26, 2011, at 3:59 AM, Stephane Bortzmeyer wrote:
> On Tue, Sep 20, 2011 at 02:54:35PM -0600,
> Luis Diego Espinoza S. <lespinoz at nic.cr> wrote
> a message of 26 lines which said:
>
>> One of the servers run out of disk space on Sep 14th at 7:00 am
>> (13:00 UTC). Subsequently, one of the zone files was truncated,
>> resulting in a correct SOA but with less data, not an evident error.
>
> Thanks for the report. The advices I can give (every zone generator
> has to guard itself againt this sort of problems):
>
> * always check return codes (if you use C, check the return code of
> close; or use a langauge with exceptions; in shell, use "set -e")
> * check the zone file before reloading the name server: size (should
> never decrease, or only by a very small amount), amount of changes,
> * add a dummy TXT at the *end* of the zone file: its absence means a
> problem,
Ok, this is going to bug me all day if I don't ask it now...
There was a really well known zone (root? .arpa? something) that had something exactly like that at the end of the zone, and I seem to remember it was not a TXT record (maybe an HINFO?).
Does anyone know what I'm on about? and what the label was? and the zone / record?
One of those useless trivia things that's going to bug me all day..
W
> * monitor the disk space (just in case).
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