Re: The OpenLDAP Client and Multiple DNS Records

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

Howard Chu wrote:
> George Holbert wrote:
>   
> > 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.
> >     
>
> False. If multiple A records are returned, if the first address fails it will 
> continue on to the next, stopping when something succeeds or it runs out of 
> alternatives.

Wow.  Then OpenLDAP handles this a lot more intelligently than I 
thought.  Thanks Howard!