On 09/07/2010 09:24 AM, Atom Powers wrote:
On Tue, Sep 7, 2010 at 11:53 AM, Matthew Barr<mb...@mbarr.net> wrote:
On Tue, 7 Sep 2010, Brodie, Kent wrote:
We actually put DHCP, DNS, and LDAP on single boxes, and considered those
our primary boot first boxes. Almost nothing would work w/o those
services. Each of them has some reasonable highly available option, and
made life easy.
How do you make DNS highly available (or load balance it)?
Most clients use the first server on the list and if it doesn't answer
then it tries the next etc. But the time-out makes some operating
systems (Windows) very sad.
There are a few fancy tricks for doing load-balanced DNS stuff, things
that should reduce time-out occurrences . The main one that springs to
mind is using Anycast, and route advertising through Zebra.
<http://www.zebra.org/>
http://ftp.isc.org/isc/pubs/tn/isc-tn-2004-1.htm
<http://ftp.isc.org/isc/pubs/tn/isc-tn-2004-1.html>
That kind of set-up was in the pipeline for a sysadmin team I was part
of a few years back but when I left hadn't actively been worked on.
Paul
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