DNS Redundancy

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#1 Wed, 12/19/2007 - 16:42
neillc

DNS Redundancy

Hi All,

I'm hoping for some hints as to what direction to go with managing DNS.

We currently have three servers - two running Virtualmin and one not. Putting Virtualmin on the third machine is probably not an option.

I'm after advice on how to get DNS working across these machines.

  • Will Virtualmin play nice with DNS servers not running webmin?
  • Will it act as a slave DNS for a non Virtual/Webmin bind?
  • Will two Virtualmin servers co-operate with each acting as a secondary DNS for each other?
  • Could I integrate the non-Virtualmin server into such a setup?
  • Even if I can, should I?

Any advice would be much appreciated.

Thanks, Neill

Thu, 12/20/2007 - 11:27
roadfox

We replicate the DNS configuration from the virtualmin to two other DNS servers, and include the named.conf.local there. and we add the two names server to the zones file.

replication is started when named.conf.local is changed by using iwatch daemon. works perfect that way.

if you just want to use you two virtualmin machines as DNS then the setup described here should work for you, just do it in both directions.

http://www.virtualmin.com/documentation/id,dns_slave_auto-configuration_...

read also here:

http://www.virtualmin.com/index.php?option=com_fireboard&Itemid=77&a...

Thu, 12/20/2007 - 14:59
Joe
Joe's picture

<div class='quote'>- Will Virtualmin play nice with DNS servers not running webmin? </div>

Sure. Why wouldn't it? ;-)

You'll just have to add the slave zones manually, or using some sort of post-edit script on the Virtualmin server.

<div class='quote'>- Will it act as a slave DNS for a non Virtual/Webmin bind?</div>

Yes, but again, you'll need to make your own slaves. And you'll have to disable DNS for the zones that it will be a slave for. You're asking to do a lot more work managing your DNS in this case.

<div class='quote'>- Will two Virtualmin servers co-operate with each acting as a secondary DNS for each other?</div>

Of course. The doc roadfox linked to covers setting that up (just do the same thing on both boxes and each will be a slave for the others zones).

<div class='quote'>- Could I integrate the non-Virtualmin server into such a setup? </div>

Sure, if you don't mind adding the slave zones manually. If you can put Webmin onto the boxes, you don't have to do even that manually.

<div class='quote'>- Even if I can, should I?</div>

Probably not, if you can avoid it. It's not that Virtualmin will behave badly, it's just that you'll have to work harder to maintain your DNS zones. And I don't know about you, but I find managing DNS zones very tedious, even for a very small number of domains. If you have a lot of customers or websites, you're just asking for pain.

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