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Linode slave DNS not working anymore
https://forum.linode.com/viewtopic.php?f=19&t=12044		 Page 1 of 1
Author:  NeoID [ Sun Jul 12, 2015 2:48 pm ]
Post subject:  Linode slave DNS not working anymore
Hi,

I haven't touched my server configuration for quite some time now, but after I brought a new domain, I've noticed that I have some weird DNS issue. My domain is idmedia.no and I'm using NSD for ns1.idmedia.no and Linode slave DNS for ns2 and 3.

However, when I run dig I get the following. Querying ns1.idmedia.no works as it should...
Code:
dig @ns2.idmedia.no idmedia.no

; <<>> DiG 9.9.5-3ubuntu0.3-Ubuntu <<>> @ns2.idmedia.no idmedia.no
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 47412
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1024
;; QUESTION SECTION:
;idmedia.no.                    IN      A

;; Query time: 109 msec
;; SERVER: 69.93.127.10#53(69.93.127.10)
;; WHEN: Sun Jul 12 20:43:57 CEST 2015
;; MSG SIZE  rcvd: 39


idmedia.no.conf:
Code:
NS      ns1.idmedia.no.
NS      ns2.idmedia.no.
NS      ns3.idmedia.no.

ns1             A       109.74.199.166
ns2             A       69.93.127.10
ns3             A       65.19.178.10


netstat
Code:
netstat -ntlp | grep LISTEN
tcp        0      0 0.0.0.0:53              0.0.0.0:*               LISTEN      2930/nsd
tcp        0      0 127.0.0.1:8952          0.0.0.0:*               LISTEN      2930/nsd



Does anyone of you have any idea on how I can debug this?
I will gladly provide other info if needed.
Author:  tmberg [ Sun Jul 12, 2015 4:19 pm ]
Post subject:  Re: Linode slave DNS not working anymore
If you have bought a new domain, you have to setup Linode to act as slaves for it.

/T
Author:  NeoID [ Sun Jul 12, 2015 4:46 pm ]
Post subject:  Re: Linode slave DNS not working anymore
tmberg wrote:
If you have bought a new domain, you have to setup Linode to act as slaves for it.

/T

I've added it as a slave in the DNS Manager yesterday without any luck. It's still not replicating to ns2 or ns3
Author:  tmberg [ Sun Jul 12, 2015 5:03 pm ]
Post subject:  Re: Linode slave DNS not working anymore
Have you seen any usefull info in the nsd log?
Author:  NeoID [ Sun Jul 12, 2015 5:12 pm ]
Post subject:  Re: Linode slave DNS not working anymore
This is the full log:
Code:
cat /var/log/nsd.log
[1416587409] nsd[2786]: notice: nsd started (NSD 4.0.1), pid 2778
[1417112315] nsd[23551]: notice: nsd started (NSD 4.0.1), pid 23549
[1417120578] nsd[24290]: warning: nsd is already running as 23549, continuing
[1417120578] nsd[24290]: error: can't bind udp socket: Address already in use
[1417120578] nsd[24290]: error: server initialization failed, nsd could not be started
[1417516305] nsd[2788]: notice: nsd started (NSD 4.0.1), pid 2781
[1418047399] nsd[8211]: warning: signal received, shutting down...
[1418048794] nsd[2765]: notice: nsd started (NSD 4.0.1), pid 2757
[1419945731] nsd[4222]: notice: nsd started (NSD 4.0.1), pid 4220
[1419945733] nsd[4224]: warning: nsd is already running as 4220, continuing
[1419945733] nsd[4224]: error: can't bind udp socket: Address already in use
[1419945733] nsd[4224]: error: server initialization failed, nsd could not be started
[1422007293] nsd[4227]: warning: signal received, shutting down...
[1422007308] nsd[7559]: notice: nsd started (NSD 4.0.1), pid 7552
[1422754449] nsd[2838]: notice: nsd started (NSD 4.0.1), pid 2824
[1422755420] nsd[3969]: notice: nsd started (NSD 4.0.1), pid 3967
[1422755422] nsd[3971]: warning: nsd is already running as 3967, continuing
[1422755422] nsd[3971]: error: can't bind udp socket: Address already in use
[1422755422] nsd[3971]: error: server initialization failed, nsd could not be started
[1422755686] nsd[4006]: notice: nsd started (NSD 4.0.1), pid 4004
[1422755688] nsd[4008]: warning: nsd is already running as 4004, continuing
[1422755688] nsd[4008]: error: can't bind udp socket: Address already in use
[1422755688] nsd[4008]: error: server initialization failed, nsd could not be started
[1423231847] nsd[6568]: warning: signal received, shutting down...
[1423231847] nsd[4004]: error: xfrd: error writing shutdown to main: Broken pipe
[1423231985] nsd[2855]: notice: nsd started (NSD 4.0.1), pid 2847
[1425326467] nsd[2855]: warning: signal received, shutting down...
[1425326467] nsd[2847]: error: xfrd: error writing shutdown to main: Broken pipe
[1425327536] nsd[2842]: notice: nsd started (NSD 4.0.1), pid 2833
[1436608097] nsd[2842]: warning: signal received, shutting down...
[1436608156] nsd[2936]: notice: nsd started (NSD 4.0.1), pid 2930
[1436735313] nsd[7565]: warning: signal received, shutting down...
[1436735313] nsd[7851]: notice: nsd started (NSD 4.0.1), pid 7849
[1436735327] nsd[7851]: warning: signal received, shutting down...
[1436735374] nsd[2920]: notice: nsd started (NSD 4.0.1), pid 2914


The only thing I can see is "error: can't bind udp socket: Address already in use", but I've checked the firewall config and nothing else is using :53 as far as I can tell...

lsof -i :53
Code:
COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
nsd     2914  nsd    4u  IPv4  10368      0t0  UDP *:domain
nsd     2914  nsd    5u  IPv4  10369      0t0  TCP *:domain (LISTEN)
nsd     2920  nsd    4u  IPv4  10368      0t0  UDP *:domain
nsd     2920  nsd    5u  IPv4  10369      0t0  TCP *:domain (LISTEN)
nsd     2947  nsd    4u  IPv4  10368      0t0  UDP *:domain
nsd     2947  nsd    5u  IPv4  10369      0t0  TCP *:domain (LISTEN)
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