RE: DNS & multiple names and copy statements

[Martin, Jason H]

That would work, although in a large environment it will probably be
difficult to get that kind of DNS change implemented. I think a module
that performs a ping and health check of the master servers to find the
best candidate would work better and rely less on other systems.

-Jason Martin

> -----Original Message-----
> From: 
> help-cfengine-bounces+jason.h.martin=cingular.com@gnu.org 
> [mailto:help-cfengine-bounces+jason.h.martin=cingular.com@gnu.
> org] On Behalf Of Marco van Beek
> Sent: Thursday, December 08, 2005 2:30 AM
> To: help-cfengine@gnu.org
> Subject: Re: DNS & multiple names and copy statements
> 
> 
> > After thinking about it a bit more, it would probably be 
> much easier 
> > to implement a module that takes as input a list of servers and 
> > outputs a variable with the best available, which would 
> then be used 
> > in the copy statements.
> 
> This is the way I would look at doing it:
> 
> Lets say, for example, we have a bunch of buildings linked via a low 
> bandwidth link, so each building is on a different subnet and traffic 
> over the links is at a premium.
> 
> I would place a master server in each building, and each 
> building would 
> have it's own dns server. The main building would have a primary 
> cfengine server, as well as a secondary (if it needed it on 
> that site).
> 
> The DNS server on each site has its own local cfengine server as a 
> static (CNAME rather than A perhaps) entry, but it is the 
> same name on 
> every site (but depending on which site you are on, you will get a 
> different IP address when you resolve the name).
> 
> Then in order to get the secondary servers to update from the 
> primary, 
> you just set the secondaries to resolve to a master DNS server in the 
> main building, which resolves the server name to the primary cfengine 
> server.
> 
> Does this make sense?
> 
> Regards,
> 
> Marco.
> 
> 
> _______________________________________________
> Help-cfengine mailing list
> Help-cfengine@gnu.org 
> http://lists.gnu.org/mailman/listinfo/help-> cfengine
>