Hello again,
I've successfully upgraded our DNS to the latest version of PowerDNS -
2.9.22 - and got the OpenDBX/MySQL and auto-serial stuff working nicely.
However I now have a new problem.
We have several hundred slave domains configured for various different
customers and each customer has their own Master server (Bind usually)
on a separate IP address and they manage their zone files themselves.
What's happening now is that PowerDNS seems to be munging all of those
different slaves in to a pool and trying all of them in turn, over and
over in a loop when it encounters a problem with a domain. So trying to
get the SOA for a domain from a server that's in most cases not
authoritative for that domain and causing all sorts of grief and a lot
of DNS traffic. It does this many times a second for each domain and
eventually gives up and moves on to the next. I would expect a
problem/timeout loading an SOA to get the serial for a slaved domain to
cause nothing more than for PowerDNS to move on to the next domain,
instead it's getting in to a frantic state!
Does anyone know what might be causing this?
Here is the domains entry for a particular domain:
mysql> select * from domains where name='somedomain.com'\G
*************************** 1. row ***************************
id: 49934
name: somedomain.com
master: 12.34.131.163
last_check: 1248691024
type: SLAVE
notified_serial: NULL
account: 1234567890-A-BCD
status: A
auto_serial: 0
1 row in set (0.00 sec)
mysql>
And a sanitised example of the log entries (they are copious)
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.128.229' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.131.153' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.131.153' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master '12.34.128.11'
for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.128.11' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.128.208' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Query to '12.34.128.208' for SOA of 'somedomain.com '
produced a NS record
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.128.106' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Query to '12.34.128.106' for SOA of 'somedomain.com '
produced a NS record
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.131.106' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.131.106' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.128.148' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.128.148' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.131.153' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.131.153' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.128.105' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.128.105' because of previous
timeouts in this cycle
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.128.106' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Query to '12.34.128.106' for SOA of 'somedomain.com '
produced a NS record
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.128.106' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Query to '12.34.128.106' for SOA of 'somedomain.com '
produced a NS record
Mar 17 17:26:22 dnsserver pdns[15018]: Trying next master
'12.34.131.153' for 'somedomain.com '
Mar 17 17:26:22 dnsserver pdns[15018]: Error trying to retrieve/refresh
'somedomain.com ': Skipping query to '12.34.131.153' because of previous
timeouts in this cycle
Kind regards,
Stephen Harker
--
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