Checking for zone expiration?
warren at kumari.net
Mon May 21 21:19:39 UTC 2012
On May 21, 2012, at 3:16 PM, Alan Batie wrote:
> We had a rather key zone mysteriously expire on a slave this morning -
> the log files show a transfer a couple weeks ago, but it hadn't been
> updated so there was no reason for one since and there were no log
> entries about failed connection attempts. I was wondering if there's a
> way to check the remaining time on a zone for monitoring?
Why yes, yes there is…
I wrote a tool to do this a while back -- http://code.google.com/p/dns-slave-expire-checker/
Basically, it runs on the slave and checks to see if the MTIME on the file is getting close to the TTL. If so it will generate a warning, if the zone expires it will generate an error.
I don't think I ever mentioned it's existence to anyone, so YMMV, etc.
Lemme know if it sucks/ has bugs / causes male pattern baldness and I'll try take care of that…
> If you fetch
> the SOA, you get the full ttl, for obvious reasons, not the server's
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