[Pdns-users] Oracle backed slave zone nameserver problem.

a b tripivceta at hotmail.com
Thu Mar 27 16:16:39 UTC 2014

> I noticed in oracle backed schema SQL,  there  isn't  any  master
> nameserver column available in Zones table.

> I can specify zone type, but not master name server  if  type  is
> set to slave.

That is correct. "Works as designed."

SQL> desc zones
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID                                        NOT NULL NUMBER(38)
 NAME                                      NOT NULL VARCHAR2(512)
 TYPE                                      NOT NULL VARCHAR2(32)
 LAST_CHECK                                         NUMBER(38)
 REFRESH                                            NUMBER(38)
 SERIAL                                    NOT NULL NUMBER(38)
 NOTIFIED_SERIAL                                    NUMBER(38)

SQL> SELECT type FROM zones;


The reason for this that the documentation recommends slaving  be
implemented via database replication.

However, one can also configure replication via  the  traditional
AXFR.  If  one  configures  replication  via  AXFR,  "master" and
"slave"  is   driven   by   "master=yes"   and   "slave=yes"   in
pdns.conf(4),  where a server can be both a master and a slave at
the same time.

The way to distinguish a master from the slave is the SOA  record
in  the records table. The slave will have a type of "NS", but no
SOA record.

AXFR is triggered by atomically updating  the  serial  number  in
records.content  WHERE  type  =  'SOA'  and  in the corresponding

I too have a zonemasters table, but it is empty. I never did fig-
ure out what it was for, but as it turns out,  it does not appear
to be required for normal master-slave operation.

SQL> SELECT * FROM zonemasters;

no rows selected 		 	   		  

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