This is a discussion on RE: Question regarding dynamic updates - DNS ; I really hate to be the "me too" guy, but I'd also love to see how that works. We're currently using CVS to store the zones and checking everything out/restarting named whenever there are any changes. This isn't ideal, and ...
I really hate to be the "me too" guy, but I'd also love to see how that
works. We're currently using CVS to store the zones and checking
everything out/restarting named whenever there are any changes. This
isn't ideal, and your method seems to be much better/more efficient.
I like your ideas, and would love to subscribe to your newsletter.
From: email@example.com [mailto:firstname.lastname@example.org] On
Behalf Of Mike Diggins
Sent: Monday, September 29, 2008 9:41 AM
Cc: David Forrest
Subject: Re: Question regarding dynamic updates
Thanks for the reply. So instead of creating the zone from scratch and
HUP'ing named, apply the static entries (from the database) using
nsupdate (or similar)? I wouldn't mind having a look at your script if
you don't mind.
Assuming a database of 30,000 hosts with various DNS records (PTR,
etc) for each, how long would it take to nsupdate that?
On Sun, 28 Sep 2008, Chris Thompson wrote:
> On Sep 28 2008, David Forrest wrote:
>> On Sun, 28 Sep 2008, Mike Diggins wrote:
>>> My DNS environment (BIND) consists of a Master Name Server which is
>>> updated via a Database. A web page allows for changes, which updates
>>> the database, and periodically the database is dumped out to zone
>>> files for named, which are read and propagated to my slaves via
>>> regular zone transfers.
>>> My question is about transitioning to Dynamic updates, which I am
>>> not yet allowing. We have a number of zones, all updated through the
>>> Web interface I describe above. What happens if I want a client to
>>> be able to update one of those zones dynamically, while still
>>> updating all the static entries in the same zone, via the
>>> Web/Database and zone transfers? Is that even possible to update a
>>> zone this way, and allow dynamic updates? I can't seem to wrap my
head around that. Can someone straighten me out?
>> Investigate the rndc freeze and thaw commands. I dynamically update
>> my internal zones this way as it rolls the dynamic .jnl files into
>> the zones and deletes the .jnls. Although I seen on this list that
>> the serial numbers are updated, I haven't seen that. But it looks
>> like your database dumping script would update them anyway so that
would seem correct.
>> I see this as a possibility:
>> rndc freeze
>> update database
>> rndc thaw
> I would rather advise you to make your own updates via DNS update
> operations. I can offer you a Perl script that compares two
> normalised-by-"named-checkzone -D" zone files and generates input to
> nsupdate(1) that will turn one into the other. This is primarily
> intended for use when the whole zone contents are derived from the
> database, but you may be able to tweak it for use when some of the
> zone is under foreign control.
> Chris Thompson
> Email: email@example.com
Mike Diggins Voice: 905.525.9140 Ext. 27471
Network Analyst, Enterprise Networks FAX: 905.528.3773
University Technology Services E-Mail: firstname.lastname@example.org
McMaster University, Hamilton, Ontario
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