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Re: Partial replication

On 04/01/10 21:43, Andrew Findlay wrote:
On Wed, Mar 31, 2010 at 08:43:19AM +0200, Zdenek Styblik wrote:

How about to refuse rights to the syncrepl user?
Actually, you could apply this to the whole tree. Just allow read to DNs
you want to replicate. So, let's say you use cn=mirrorA,dc=domain,dc=tld
for replication, then allow this cn=mirrorA to read only
o=support,dc=example,dc=com and o=location_A,dc=example,dc=com, but nowhere

I have used that technique for a fairly complex design with a central
office and many small satellites. It works OK *provided* you never change
the list of entries that can be seen by the replicas. The syncrepl
system has no way to evaluate the effect of an ACL change (and probably
no way to know that one has happenned).

Could you please elaborate more on this one? Because I'd say if you refuse access later to some DN then it must be like DN has been deleted. Same goes for adding. I mean, syncrepl won't see data. And it checks, well it should check, for changes in some regular intervals, right?
I have no need for nor experience with this, yet it's somewhat interesting.

ACLs of anykind in OpenLDAP are kinda ... PITA, no offense to anybody!!! :) It just needs a lot of work to maintain and stuff (please please, no bashing).


In this case it may be better to set up multiple replication agreements
to cover the multiple subtrees required at the slave server. That would
also make it possible to chain or refer queries for the rest of the
DIT back to the master.