OpenLDAP + CARP

[Brandon Gooch]

On Tue, Sep 20, 2011 at 6:02 AM, Rafael NAVAZA <rnavaza at hotmail.com> wrote:
>
> Thank you for the reply Matthew.
>
> I'm indeed using the built in
> failover capability of LDAP clients. It works just fine when the first
> LDAP server is powered off, but it does not work that well when slapd
> becomes a zombi ( because the clients take about 1 min to try the second
>  LDAP server, for each request, every time ... )
> It is for that reason I'm interested in building a HA cluster for OpenLDAP.
>
> I'm
>  currently using the single-master replication and I will certainly move
>  to a mirrormode or a n-way multimaster replication schema (as long as
> the multimaster is used with CARP, this mode is equivalent to a
> mirrormode with more than 2 replicas, isn't it ?).
>
> As far as I
> know CARP will not check if the slapd is running correctly; that could
> be a problem if the CARP Master has a failing slapd. Do I have to
> monitor slapd with a third party software (like Monit) ? Can I configure
>  CARP and OpenLDAP to watch each other more closely ?
>
> Rafael.
>

Could this help in your situation?

http://www.liquidx.net/blog/2006/04/03/nss_ldap-undocumented-nss_reconnect_tries/

-Brandon