Re: The OpenLDAP Client and Multiple DNS Records

["George Holbert" <gholbert@broadcom.com>]

Tim Gustafson wrote:
> Hi,
>
> How does the OpenLDAP client library handle multiple A records being returned for a DNS query for an LDAP server?
>   

OpenLDAP doesn't alter hosts resolution behavior.
As usual, the first address (A record) returned would be used.

> That is to say, if "host ldap" returns 1.1.1.1, 2.2.2.2 and 3.3.3.3, will the OpenLDAP client library only connect to 1.1.1.1?  If a connection to 1.1.1.1 fails, will it try 2.2.2.2 and then 3.3.3.3?
>   

It will not try 2.2.2.2 or 3.3.3.3 automatically if a connection attempt 
to 1.1.1.1 fails.
It might happen to try them on the next connection, if the host needs to 
resolve the LDAP server's name again, and either 2.2.2.2 or 3.3.3.3 is 
the first A record returned.


> Basically we're trying to achieve redundant servers and load balancing using a round-robin-style DNS entry.
>
> Tim Gustafson
> BSOE Webmaster
> UC Santa Cruz
> tjg@soe.ucsc.edu
> 831-459-5354
>
>
>