Setting up a backup server

[Kevin Darcy]

Hiten Patel wrote:

>Let me explain further both webservers have db's lamp style. I will have
>mysql setup with replication between the two servers. The primary (master)
>server replicates to the secondry server in this case, I don't think the
>secondary server (slave) will replicate to the primary. This db replication
>is very similar to standard dns master/slave setup. Now since the second
>webservers db's doesn't replicateto the first I don't want it to be accessed
>unless the first one is down. So basically I've set-up a mirrored server and
>only want it accessible went the primary is down as any data setup on the
>secondary will not be replicated to the primary.
>
>So really I need DNS to only access the first webserver, if that vwebserver
>is inaccessible (if it's down) then redirect to the second webserver
>
>Hiten
>
>"Jeffrey Meltzer" <jeffrey at meltzer.org> wrote in message
>news:bkskor$duj$1 at sf1.isc.org...
>Round Robin DNS is either/or.
>
>IE, if www.you.com has 2 a records as 111.111.111.111 and 222.222.222.222, a
>lookup will return both ip's, at random. I think what you want is some kind
>of Load Balancer, etc.
>
>  
>
>>-----Original Message-----
>>From: bind-users-bounce at isc.org
>>[mailto:bind-users-bounce at isc.org] On Behalf Of Hiten Patel
>>Sent: Wednesday, September 24, 2003 10:54 AM
>>To: comp-protocols-dns-bind at isc.org
>>Subject: Setting up a backup server
>>
>>Hi,
>>
>>I would like to setup a backup webserver that is accessed
>>when the first
>>webserver is down.
>>ie
>>111.111.111.111 webserver one
>>222.222.222.222 webserver two (mirror of web server one)
>>
>> www.domain.com on 111.111.111.111 is redirected to
>>222.222.222.222, when
>>webserver one is down.
>>
>>I want webserver two on 222.222.222.222 to be accessed ONLY
>>when webserver
>>one is not available.
>>At all other times the webserver two is online but not being access
>>(redundant backup).
>>
>>I thing this is possible using round robin DNS but have now
>>idea how to set
>>this up, the howto's I have
>>seen all mention that both servers are accessed.
>>
>>is it possible to do this with bind 9.
>>
>>hope someone can help me
>>
>>Hiten
>>
There's no good way to do this with BIND alone. This is what 
load-balancing products are for.

                                                                         
                     - Kevin