[Pdns-users] PDNS 3.x with PDNS 2.9.x Database Schema

Gabriel Marais gabriel.j.marais at gmail.com
Thu Jul 23 12:47:40 UTC 2015

On 2015/07/22 06:48 PM, Mark Moseley wrote:
> On Tue, Jul 21, 2015 at 5:00 PM, Gabriel Marais
> <gabriel.j.marais at gmail.com <mailto:gabriel.j.marais at gmail.com>> wrote:
>     Hi Guys
>     Seems like I have hit a brick wall. I have PowerDNS 2.9.x running as
>     master and 2 slaves. I am busy moving over to Ubuntu 14.x on newly
>     installed servers and as such I ended up with PowerDNS 3.x which is
>     not compatible with the older 2.9 schema on MySQL.
>     I have read in a thread that one could use custom queries to
>     overcome the immediate issue of moving a complete DNS implementation
>     over to the version 3.x schema but I cannot seem to find the custom
>     queries to overcome the issue from my log :-
>     Jul 22 01:17:46 hubble pdns[2006]: Backend error: Failed to execute
>     mysql_query, perhaps connection died? Err=1: Unknown column 'auth'
>     in 'field list'
>     Ultimately, I would like to move over to PowerDNS 3.x but right now
>     I need to get another 'slave' working which is sitting on PowerDNS
>     3.x to work with my 2.9 master and database schema.
>     Can anyone perhaps point me in the right direction with the custom
>     queries to accommodate the missing "auth" column in the new DB schema?
Hi Mark

Thanks for the reply. This is what I was looking for..
> I limped by for a little while with these queries, in the middle of a
> 2.9.x->3.x upgrade. It's been long enough now that I couldn't tell you
> what negative side effects it had, but I do remember that AXFR's did
> *NOT* work with the below queries. IIRC with this setup, AXFRs will
> actually cause a restart of pdns, so you'd want to get off of it pretty
> quick.
I added the queries to my config file, pdns.local.gmysql.conf
But I'm still getting the error on the "auth" field :-
Backend error: Failed to execute mysql_query, perhaps connection died? 
Err=1: Unknown column 'auth' in 'field list'

> # Use old queries till we get schema updated
> gmysql-basic-query=SELECT content,ttl,prio,type,domain_id,name FROM
> records WHERE type='%s' and name='%s'
> gmysql-any-id-query=SELECT content,ttl,prio,type,domain_id,name FROM
> records WHERE name='%s' and domain_id=%d
> gmysql-list-query=SELECT content,ttl,prio,type,domain_id,name FROM
> records WHERE 0=%d and domain_id='%d' order by name, type
> At the same time, the 2.9.x boxes might work just fine (but you'd
> obviously want to test first) with the 3.x schema, though I'm assuming
> you're doing mysql replication.

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