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<div>Several years ago I used a Perl script called "lbnamed" that monitored status and returned the host IP address that was least loaded.
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<div>Mike Mitchell</div>
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-------- Original message --------<br>
From: Steven Carr <sjcarr@gmail.com> <br>
Date: 08/21/2013 10:25 PM (GMT-08:00) <br>
To: bind-users <bind-users@lists.isc.org> <br>
Subject: Re: ISO or virtual appliance <br>
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<div class="PlainText">On 22 August 2013 05:39, Manish Rane <manishr78@gmail.com> wrote:<br>
> So, DNS will monitor the host on port 80 and as soon as it detects that<br>
> either of the host/link is down it would remove the associated entry and<br>
> re-populate the entries<br>
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> Is any one aware of such solution readily available? I believe I already<br>
> posted similar question but havent heard much positive things.<br>
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The only open source "appliance" I'm aware of is<br>
<a href="http://www.zenloadbalancer.org">http://www.zenloadbalancer.org</a> but AFAIK that doesn't update DNS, it<br>
proxies the traffic on a virtual IP address to balance/provide HA.<br>
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The easiest method if you want to do it by DNS is a simple script that<br>
is cron'd to run every X minutes and either use `nsupdate` to push<br>
updates to the records or sed/awk to rename records and then reload<br>
zone files. Not sure what you are struggling with, this is something<br>
that can be knocked together in a matter of minutes by any<br>
scripter/programmer. If you have a monitoring system like Nagios you<br>
could use the various hooks it provides to run scripts when something<br>
happens/changes state rather than writing your own custom monitoring<br>
piece.<br>
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Steve<br>
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