Well, I was thinking on the same line. Use nagios plugins check_tcp and monitor the status. The only challenge I am seeing here is updating zone and nsupdate I believe can only work with Dynamic zones and not with static entries.
Sed/awk might not scale well if the zone count increases hence wondering if there are any php/jsp developers available in this community who can take this up a anew open source project just like developing solution similar to F5 GTM/LTM. I guess if we use mysql as a backend to store the zone or entries then by passing the queries we can alter the zone file. But again challenges are how to run a check_tcp from front end or pass the output of that command so that appropriate changes will be done in zone file. Any ideas guys?? On Thu, Aug 22, 2013 at 1:16 PM, Mike Mitchell <mike.mitch...@sas.com>wrote: > Several years ago I used a Perl script called "lbnamed" that monitored > status and returned the host IP address that was least loaded. > > Mike Mitchell > > > > -------- Original message -------- > From: Steven Carr <sjc...@gmail.com> > Date: 08/21/2013 10:25 PM (GMT-08:00) > To: bind-users <bind-users@lists.isc.org> > Subject: Re: ISO or virtual appliance > > > On 22 August 2013 05:39, Manish Rane <manish...@gmail.com> wrote: > > So, DNS will monitor the host on port 80 and as soon as it detects that > > either of the host/link is down it would remove the associated entry and > > re-populate the entries > > > > Is any one aware of such solution readily available? I believe I already > > posted similar question but havent heard much positive things. > > The only open source "appliance" I'm aware of is > http://www.zenloadbalancer.org but AFAIK that doesn't update DNS, it > proxies the traffic on a virtual IP address to balance/provide HA. > > The easiest method if you want to do it by DNS is a simple script that > is cron'd to run every X minutes and either use `nsupdate` to push > updates to the records or sed/awk to rename records and then reload > zone files. Not sure what you are struggling with, this is something > that can be knocked together in a matter of minutes by any > scripter/programmer. If you have a monitoring system like Nagios you > could use the various hooks it provides to run scripts when something > happens/changes state rather than writing your own custom monitoring > piece. > > Steve > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users > > > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users >
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