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RE: [Linux-cluster] RHEL4.0 CS and Ldap



I am currently using Heartbeat to solve my need for Highly Available Ldap servers. I was just trying to figure another way to provide HA, replication with RHEL4.0 CS.  It would be nice to build a RHEL4.0 CS service for ldap that would cover all of my requirements.

Just a thought.
Thanks for the replies...
 

-----Original Message-----
From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Kovacs, Corey J.
Sent: Thursday, March 09, 2006 8:08 AM
To: linux clustering
Subject: RE: [Linux-cluster] RHEL4.0 CS and Ldap

You might be able to, but it's not really cluster related. You'll get better information on the openldap lists.


Cheers.



Corey 

-----Original Message-----
From: linux-cluster-bounces redhat com
[mailto:linux-cluster-bounces redhat com] On Behalf Of Baesso Mirko
Sent: Thursday, March 09, 2006 9:00 AM
To: linux clustering
Subject: R: [Linux-cluster] RHEL4.0 CS and Ldap

Sorry but i try to use sync-replica either then slurpd on openldap 2.3, can i setup a multi-master environment?


Baesso Mirko - System Engineer
KSolutions.S.p.A.
Via Lenin 132/26
56017  S.Martino Ulmiano (PI) - Italy
tel.+ 39 0 50 898369 fax. + 39 0 50 861200
baesso ksolutions it   http//www.ksolutions.it

-----Messaggio originale-----
Da: Kovacs, Corey J. [mailto:cjk techma com]
Inviato: giovedì 9 marzo 2006 14.43
A: linux clustering
Oggetto: RE: [Linux-cluster] RHEL4.0 CS and Ldap

Multi master LDAP is not all that it's cracked up to be. There are few benefits in being able to write to different servers. The problem is that like many things, the rule is "Last write wins". Writing in LDAP dirs is not something that is "typically" done in high volumes anyway, but reading is. If you just need to load balance traffic, then you might look into an LVS implementation. That way you can set up several replicas and spread the load across them. If your Master gets blown away, you can promote of the replicas to a master.. Just takes some manual intervention.


Just my two cents...


Corey 

-----Original Message-----
From: linux-cluster-bounces redhat com
[mailto:linux-cluster-bounces redhat com] On Behalf Of Nick Burrett
Sent: Thursday, March 09, 2006 4:49 AM
To: linux clustering
Subject: Re: [Linux-cluster] RHEL4.0 CS and Ldap

Rainer Duffner wrote:
> Lon Hohberger wrote:
> 
>> On Wed, 2006-03-08 at 12:43 -0600, Dalton, Maurice wrote:
>>  
>>
>>> Is there a way to create an Ldap cluster that can do replication 
>>> with RHEL 4.0 CS?
>>>   
>>
>>
>> For some reason, I though OpenLDAP had built-in replication?
>>  
>>
> 
> 
> Not multi-master (which I assume is what the original poster wants).
> 
> http://www.redhat.com/en_us/USA/home/solutions/directoryserver/
> 
> exists for a reason...

As I understand it, multi-master can be accomplished in OpenLDAP 2.3 using sync-replication between the two nodes.  This is not true multi-master, but the effect is near-enough.

Regards,

Nick.

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