ISO or virtual appliance

[Manish Rane]

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.Mitchell at 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 <sjcarr at gmail.com>
> Date: 08/21/2013 10:25 PM (GMT-08:00)
> To: bind-users <bind-users at lists.isc.org>
> Subject: Re: ISO or virtual appliance
>
>
>  On 22 August 2013 05:39, Manish Rane <manishr78 at 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
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