ISO or virtual appliance

[Manish Rane]

That seems to be a dead link. I am unable to down load the file.

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Thanks and Regards,
Manish R


On Thu, Aug 22, 2013 at 9:05 PM, Mike Mitchell <Mike.Mitchell at sas.com>wrote:

>  lbnamed is a DNS server written in Perl.  You delegate a zone to it, and
> let it dynamically figure out the best IP address to return.
>
>  See http://www.stanford.edu/~riepel/lbnamed/
>
>  There are 3rd-party appliances that do similar functions, such as F5's
> GTM or Cisco's GSS.
>
>  Mike Mitchell
>  ------------------------------
> *From:* Manish Rane [manishr78 at gmail.com]
> *Sent:* Thursday, August 22, 2013 5:05 AM
> *To:* Mike Mitchell
> *Cc:* Steven Carr; bind-users
>
> *Subject:* Re: ISO or virtual appliance
>
>   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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>
>
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