[nsd-users] NSD not starting

[Michael A. Peters]

Yes, when they migrated me - they kept the IPv4 the same but yes, the 
IPv6 address changed. I turned off the external IPv6 interface and it 
starts.

I contacted them, hopefully they will let me get the old IPv6 address 
back, otherwise I probably have to go through a hassle with all my 
domains pointing to it as an authoritative.

Well at least now I know what caused it.

On 02/13/2017 05:41 AM, W.C.A. Wijngaards wrote:
> Hi Michael,
>
> Did the interface address change?  The IP address is listed in nsd.conf.
>
> Perhaps the interface is down or unusable during early system startup,
> the options ip-freebind and ip-transparent allow you to bind to the
> address even though it does not (yet) exist.  Perhaps one of these
> options can solve your problem?
>
> Best regards, Wouter
>
> On 13/02/17 14:35, Michael A. Peters wrote:
>> First from /var/log/messages -
>>
>> Feb 13 13:22:29 li354-217 systemd: Cannot add dependency job for unit
>> microcode.service, ignoring: Unit is not loaded properly: Invalid argument.
>> Feb 13 13:22:29 li354-217 systemd: Started NSD DNS Server.
>> Feb 13 13:22:29 li354-217 systemd: Starting NSD DNS Server...
>> Feb 13 13:22:29 li354-217 nsd[30882]: nsd starting (NSD 4.1.14)
>> Feb 13 13:22:29 li354-217 nsd: [2017-02-13 13:22:29.498] nsd[30882]:
>> notice: nsd starting (NSD 4.1.14)
>> Feb 13 13:22:29 li354-217 nsd[30882]: can't bind udp socket: Cannot
>> assign requested address
>> Feb 13 13:22:29 li354-217 nsd: [2017-02-13 13:22:29.500] nsd[30882]:
>> error: can't bind udp socket: Cannot assign requested address
>> Feb 13 13:22:29 li354-217 nsd[30882]: server initialization failed, nsd
>> could not be started
>> Feb 13 13:22:29 li354-217 nsd: [2017-02-13 13:22:29.518] nsd[30882]:
>> error: server initialization failed, nsd could not be started
>> Feb 13 13:22:29 li354-217 systemd: nsd.service: main process exited,
>> code=exited, status=1/FAILURE
>> Feb 13 13:22:29 li354-217 systemd: Unit nsd.service entered failed state.
>> Feb 13 13:22:29 li354-217 systemd: nsd.service failed.
>>
>> I assume the microcode.service is an unrelated CentOS 7 bug, based on
>> google searches, seems to be harmless noise caused by a bad regex and
>> doesn't cause services to fail. The rest though is NSD not starting.
>>
>> NSD 4.1.14
>>
>> The host is a Linode VM that was running just fine for a long time. All
>> the host does is NSD. Another just like it still running fine.
>>
>> This host that is not starting, a few days ago Linode migrated the VM to
>> a different machine and I suspect that is the cause.
>>
>> It's not firewall, I turned it off and tried just to make sure.
>>
>> It's not anything else using port 53 - no bind or unbound, and an nmap
>> of the host shoes port 53 closed, not listening or blocked.
>>
>> I suspect something to do with how the image was migrated resulted in
>> port 53 no longer working. My ssh still works (only other service
>> listening) but I use a custom high port above 1024 for that.
>>
>> linode uses KVM - I really only have experiences as a client running an
>> image, not in the KVM side of things itself.
>>
>> Anyone know what might be possibly NSD on an image that ran well for
>> over a year to suddenly no longer be able to bind to port 53? The two
>> suggestions I got from linode support staff I had already checked and
>> weren't the issue (first suggested I had started bind, second suggested
>> my firewall was the issue, I verified both were not the cause BEFORE I
>> filed a ticket) so I think they are clueless.
>>
>> Same setup on another host that wasn't migrated is still working peachy.
>>
>> This is my third nameserver, so with this not running I only have two
>> and I do not like to only have two.
>>
>> It's a slave, not a master.
>>
>> Thank you for any suggestions.
>> _______________________________________________
>> nsd-users mailing list
>> nsd-users at NLnetLabs.nl
>> https://open.nlnetlabs.nl/mailman/listinfo/nsd-users
>
>
>
>
> _______________________________________________
> nsd-users mailing list
> nsd-users at NLnetLabs.nl
> https://open.nlnetlabs.nl/mailman/listinfo/nsd-users
>