[Yeti DNS Discuss] A weird behavior of Knot

龚道彪 dbgong at biigroup.cn
Thu Aug 27 13:24:20 UTC 2015


Thanks for the information.
 I will try to replay the issue on FreeBSD 10.1.
 
------------------ Original ------------------
From:  "Carsten Strotmann"<carsten at strotmann.de>;
Date:  Thu, Aug 27, 2015 08:35 PM
To:  "Davey(宋林健)"<ljsong at biigroup.cn>; "龚道彪"<dbgong at biigroup.cn>; 
Cc:  "discuss"<discuss at lists.yeti-dns.org>; 
Subject:  Re: [Yeti DNS Discuss] A weird behavior of Knot

 
Hello Kevin,
Hello Davey,

>> We have try to repaly  the issue of knot 2.0.0-r1 on FreeBSD,  but we
>> can't  repeat  this weird behavior.
>> Would you please provide some details of  knot environment,  such as
>> OS version, kernel version, virtual machine or physical machine and
>> so on.

it is pretty much a default FreeBSD 10.1-RELEASE, nothing special. We
will upgrade the machine to 10.2-RELEASE soon (probably this weekend).

On 27/08/15 04:54 PM, "Davey(宋林健)" wrote:
> Or any patches to Knot or OS.

No patches to the OS and no to Knot.

$ uname -a
FreeBSD yeti-dns01.dnsworkshop.org 10.1-RELEASE-p10 FreeBSD
10.1-RELEASE-p10 #0: Wed May 13 06:54:13 UTC 2015
root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64

Knot was installed from the FreeBSD pkg system.

This is the knot config:

----------

# cat /usr/local/etc/knot/knot.conf

server:
    # Listen on all configured IPv6 interfaces.
    listen: 2001:1608:10:167:32e::53 at 53

log:
  - target: syslog
    any: info

remote:
 - id: master-yeti
   address: [ 240c:f:1:22::7, 2001:200:1d9::53, 2001:559:8000::7,
240c:f:1:22::4 ]
 - id: ns4.tidelock.de
   address: [ 5.45.109.212, 2a03:4000:6:2115::2 ]

acl:
 - id: acl_master-yeti
   address:  [ 240c:f:1:22::7, 2001:200:1d9::53, 2001:559:8000::7,
240c:f:1:22::4 ]
   action: notify

 - id: acl_ns4.tidelock.de
   address: [ 5.45.109.212, 2a03:4000:6:2115::2 ]
   action: notify

zone:
# Slave zone.
  - domain: .
    master: master-yeti
    acl: acl_master-yeti
    file: /usr/local/etc/knot/root.zone

  - domain: dnsworkshop.org
    master: ns4.tidelock.de
    acl: acl_ns4.tidelock.de
    file: /usr/local/etc/knot/dnsworkshop.org-zone

----------

The machine is a virtual machine (Linux KVM), but the host is out of my
reach.

Best regards

Carsten
>
>> 在 2015年8月27日,10:41,dbgong <dbgong at biigroup.cn
>> <mailto:dbgong at biigroup.cn>> 写道:
>>
>> Hi Carsten,
>>
>> We have try to repaly  the issue of knot 2.0.0-r1 on FreeBSD,  but we
>> can't  repeat  this weird behavior.
>> Would you please provide some details of  knot environment,  such as
>> OS version, kernel version, virtual machine or physical machine and so on.
>>
>> Thank you.
>>
>> --
>> Kevin
>>
>>      
>>     *发件人:* Carsten Strotmann <mailto:carsten at strotmann.de>
>>     *发送时间:* 2015-08-14 16:43
>>     *收件人:* discuss <mailto:discuss at lists.yeti-dns.org>
>>     *主题:* Re: [Yeti DNS Discuss] A weird behavior of Knot
>>     Hi,
>>      
>>     Davey(宋林健) wrote:
>>     >
>>     > Hi all,
>>     >
>>     > We observed a weird behavior of Knot when we reset the .arpa ns
>>     records
>>     > to [a-m].root-servers.net <http://root-servers.net>
>>     <http://root-servers.net> in root zone file.
>>     >
>>     > The knot root server (yeti-dns01.dnsworkshop.org
>>     <http://yeti-dns01.dnsworkshop.org>
>>     > <http://yeti-dns01.dnsworkshop.org>)  entered a a kind of "hung”
>>     state
>>     > after updating the root zone (with a new serial number) but without
>>     > change of the NS records list for .arpa. 
>>     >
>>      
>>     some additional information: the Knot-DNS version running at the time
>>     was 2.0.0-r1. It has since been updated to 2.0.0 (the release
>>     version).
>>     The weird behavior seen might have been an artifact of the
>>     release-candidate version.
>>      
>>     I'm keeping an eye on the server and will try to gather more debug
>>     information should something similar happen again.
>>      
>>     Best regards
>>      
>>     Carsten
>>      
>>      
>>      
>>     _______________________________________________
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>>     discuss at lists.yeti-dns.org <mailto:discuss at lists.yeti-dns.org>
>>     http://lists.yeti-dns.org/mailman/listinfo/discuss
>>
>> _______________________________________________
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> 
> ---------------------------
> Davey Song(宋林健)
> BII Lab
> ljsong at biigroup.cn <mailto:ljsong at biigroup.cn>
> 
> 
>
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