failover solution without loadsharing

[Kevin Darcy]

Christoph R wrote:

> It seems that I'm having a quite uncommon setup because I have been
> looking
> for a solution for quite some time now.
>
> I have 2 servers located offsite at two different co-location partners
> (one
> in Cologne and the other in Nurnberg (both Germany) ) with 2 static IPs.
> The service I'm trying to make more fault-tolerant is only http at the
> moment.
>
> The server in Cologne should now be configured as a failover server that
> only
> acts if the server in Nurnberg is offline.
> I don't want to do any kind of loadbalancing/loadsharing at the moment
> because
> the costs for traffic are much cheaper where I want my master to be and
> I don't
> need it CPU usage wise at the moment.
> I have looked at various projects using IP address takeover but this is
> not
> possible because hoster A does not support routing for the IP from
> hoster B.
> Noreover most of those "High Availability" and cluster are intended for
> LAN
> usage only an not for this extreme distributed situation I'm having.
>
> I'm really at a loss regarding this server setup. So any ideas be it
> using
> bind or any other software are really appreciated.

DNS is not very good at this because of caching. You could change your
A record when the master HTTP server fails, but lots of clients will still
use the cached A record and try to connect to the dead server.


- Kevin