DNS update on host down

david klein root at nachtmaus.us
Thu Jul 28 12:27:37 UTC 2011

There are tools which do this, such as F5's GTM or Cisco's GSS;
essentially, you have multiple servers in a pool/answer group, and
during normal operations, they are handed out in either RR or WRR. If
one server fails his health-check, he is taken out of the mix. I
believe under the covers, it is essentially a rules-engine, BIND,
nsupdate and a few monitoring scripts.


On Tue, Jul 26, 2011 at 9:23 AM, Paul Reilly <pareilly at tcd.ie> wrote:
> Is there a simple utility, which can ICMP ping or HTTP ping a host, and
> update the hosts DNS entry if the host is down?
> I'm thinking I could have 2 include files, and swap between then if the host
> is down or not.
> Any pointers ?
> Paul
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david t. klein

Cisco Certified Network Associate (CSCO11281885)
Linux Professional Institute Certification (LPI000165615)
Redhat Certified Engineer (805009745938860)

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