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Re: set up monin and mydns dns-server

From: Martin Pala
Subject: Re: set up monin and mydns dns-server
Date: Thu, 6 Sep 2007 08:28:18 +0200

This could be good to add. I think it can take ca. 4-8 hours. Patches are welcomed ;)

As workaround for such DNS servers it is possible to use generic tcp/ udp checks (don't specify the 'protocol' option).


On Sep 5, 2007, at 6:16 PM, monit user wrote:

Many (most?) non-bind DNS server software will fail the dns protocol test in monit as it is written (dbjdns, mydns and a couple others that I tested so far), AFAIK because bind includes a "default" referral response to a query about the root servers. Even the great and powerful Paul Vixie admitted that this is something that most servers shouldn't be doing and others pointed out non- broken client resolver libraries will reject/throw out such a response.

The relationship between BIND and some of the DNS RFCs act a good example of why it sucks to take a certain application's behavior and codify it as a set of standards, as we are currently experiencing with OOXML.

To work across all DNS servers, the test should have the following options:

Protocol: UDP or TCP
Query Type: A, NS, etc
and if you care about the exact value of the response rather than the fact that there was or was not a response from the server an "expect" or "checksum" section for checking the response.

Can this go on the list?
or how do things get on the list?

How many hours do you think it would take to add a parameterized dns test?

Samuel Vogel wrote:
I would really like to do this, but actually I can only code python and php and my C skills hardly can accomplish more than writing a few if's and initializing variables... I could provide alle the infos somebody of the mydns team would need to accomplish this task. Since a DNS check is allready there, I'd hope there is only a small problem, that needs to be fixed.
Jan-Henrik Haukeland schrieb:
On 5. sep. 2007, at 08.07, Samuel Vogel wrote:

The logs point me to the Porblem, that mydns somehow fails the DNS Test, even thou it answers all querys normaly

An excellent opportunity for you to create a patch of monit's dns test @ protocol/dns.c :-)

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