[Pdns-users] empty record on slave for dot in record-name (supermaster, mysql backend)

Peter van Dijk peter.van.dijk at netherlabs.nl
Tue Dec 10 13:33:36 UTC 2013


Hello Marco,

On Dec 10, 2013, at 11:52 , Marco Fretz wrote:

> Yesterday we did a fresh installation (master and slave server) for a
> customer and I encountered a strange behaviour. When ever I make a
> record like this on the master (mysql fields name, type, content):
> 
> example.com SOA ns1.example.com hostmaster.example.com. 2013121001 28800
> 7200 604800 86400
> www.subdomain.example.com A 10.10.10.10
> 
> then I get this on the slave in mysql:
> 
> example.com SOA ns1.example.com. hostmaster.example.com. 2013121001
> 28800 7200 604800 86400
> www.subdomain.example.com A 10.10.10.10
> subdomain.example.com NULL NULL
> 
> so why is this "subdomain.example.com" added?


To fully comply with DNS standards, there can be no "holes" in the DNS tree. PowerDNS adds these NULL records to make sure there are no such holes. Please leave them in.

Kind regards,
-- 
Peter van Dijk
Netherlabs Computer Consulting BV - http://www.netherlabs.nl/

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