Load balancing w/ failover.

[phn at icke-reklam.ipsec.nu]

Ben Timby <asp at webexc.com> wrote:

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> Hello, I would like to know the easiest way to setup the following:

> 4 DNS servers running BIND 8

4 intelboxes + FreeBSD from CDROM. 15 minutes / box. Bind-8 included
in basic kit.

> 1 controller machine that distributes queries to the 4 DNS servers

One more intelbox + FreeBSD, this one with a 'forwarders { the four above };'


Another
> evenly.
> Controller will skip any machine that is not responding.
> None of the DNS server are authoritive.
> I would also like a way of sharing cache, or sending like queries to
> the same box since the domain record would already be in cache.

> I need this setup for my Lyris ListManager box, it is killing my
> current DNS server. Lyris says not to just setup multiple DNS servers
> as if one fails, it will actually slow down mail delivery more than
> just using a single DNS server would. I would like a nice automatic
> solution that always works, our lyris box cannot slow down :-). I
> took a look at:

You still have a single point of failure in my suggestion. But since
'lyris' does not cope gracefully with a nameserver failure this might be
your best solution.   ( not mentioning OSPF tricks which under carefully
controlled environments give a transparent switchover )

> lbnamed
> http://www.stanford.edu/~riepel/lbnamed/

> And it seems to lack good docs (maybe I have not dug into it enough
> yet).

> Does anyone have experience w/ it? Will it do what I want? Is there a
> better/easier way?

Install a Good Working bind in a Good HW and use FreeBSD( or if you are so 
inclined solaris on sparc).

> Thanks in advance.

> Ben Timby
> Webexcellence
> asp at webexc.com
> www.webexc.com

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-- 
Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
           Sorry about my e-mail address, but i'm trying to keep spam out,
	   remove "icke-reklam" if you feel for mailing me. Thanx.