Re: Need Help On Master-Master Replication Setup!!

To: Quanah Gibson-Mount <quanah@zimbra.com>, openldap-technical@openldap.org

Subject: Re: Need Help On Master-Master Replication Setup!!

From: pradyumna dash <neomatrixgem@gmail.com>

Date: Fri, 9 Sep 2011 23:15:50 +0200

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Hi,

This is the setup I would like to have.

LDAP clients _____________|___________________
| __________LoadBalancer1_________ |

| | | ldapserver1 ldapserver2 ldapserver3

My challange is I never did this kind of architecture before, So would like to know from LB prosepctive, How to configure it like
say i have to create a DNS FQDN e.g "ldapserver.example.com" and then use this as a floating IP/hostname for the 3 ldapservers
in the backend? or whats should be done? The network team will do the setup but i need to tell them what to do. My next question
would be i would like to configure LDAPS, so how to create the certificate i mean what to provide in common name or how to create a
certificate which can be shared across the servers, am using "openssl" ? I am using SLES 11(SP1) and the setup wiould be a Multi-Master
replication.

Please help.

Regards,
Neo

On Fri, Sep 9, 2011 at 8:14 PM, pradyumna dash <neomatrixgem@gmail.com> wrote:

Hi,

Thanks for the suggestion, but i never did it before , if you can share a doc or something would be great.

I use the openssl to generate the certificate, so even i dont know how to configure subjectAltNames. Also if you can explain a bit how i should i proceed would be appreciated.

Example : ldap1.example.com ldap2.example.com

So in the load balancer what to configure and how to create the certificate.

Please help.

Regards,
Pradyumna

On Fri, Sep 9, 2011 at 7:35 PM, Quanah Gibson-Mount <quanah@zimbra.com> wrote:

--On Thursday, September 08, 2011 10:17 PM +0200 pradyumna dash <neomatrixgem@gmail.com> wrote:

Hi,

I would like to setup OpenLDAP Mater-Master replication, before that i
would like to know something more about it, because i
never implemented the same.

Suppose i have 2 servers ldap1.example.com and ldap2.example.com

I will configure M-M replication with LDAPS, in this scenario how my
architecture should be? Do i need to keep it behind the loadbalancer or
what are the steps to do it?
How come the client will come to know if any of the server is down, it
will talk to the other server, because in my ldap.conf file i will have a
single URI/host entry
pointing to one of the server and also how to create the certificate, do
i need 2 individiual certificate 1 for ldap1 and 1 for ldap2?

I would suggest a cert for ldap1 and ldap2, both with having subjectAltNames for a load balanced name too, so clients can work directly to the servers and directly with the LB name.

--Quanah

--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
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