There's dns capability to combine roundrobin querys with a "servicename" I
think. Thus you can point to "ldapserver" and the dns will send your query to
the server that's up and running. I never tried it myself, but you'll find it at 
www.bayour.com in the ldap-kerberos howto :=)
Tarjei

"Kevin M. Myer" wrote:
> 
> Hello,
> 
> I'm using the patch that allows LDAP authentication with the SASL libraries.  Is
> there a way to specify multiple servers to bind to so that in the event that a
> directory server becomes unavailable, a backup could be used?
> 
> Short of that, what are folks doing in terms of high-availiblity/redundancy for
> LDAP?  I've thought through scenarios of using heartbeat to determine which
> machines are up and updating DNS accordingly.  I also suppose you could do
> something with a virtual IP address in a similar manner and actually get some
> load balanacing out of it too but haven't a clue where to start with that.
> 
> So what are you doing with LDAP to make sure its available all the time?
> 
> THis also spills over into postfix for the same reasons:  if the main directory
> server goes down, mail will start to bounce since my virtual maps are in LDAP.
> 
> Any thoughts or suggestions would be greatly appreciated.
> 
> Kevin
> 
> --
> Kevin M. Myer
> Systems Administrator
> Lancaster-Lebanon Intermediate Unit 13
> (717) 560-6140

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