[Samba] CTDB and LDAP: anyone?

Andrew Bartlett abartlet at samba.org
Wed Feb 20 20:51:16 GMT 2008

On Tue, 2008-02-12 at 11:01 +0000, Alex Crow wrote:
> Hi there,
> I am looking into using CTDB between a PDC and a BDC. I assume this is
> possible!
> However I have a few questions:
> 1: Do I have to use tdb2 as an Idmap backend? Can I not stay with ldap?
> (from the CTDB docs:
> A clustered Samba install must set some specific configuration
> parameters 
> clustering = yes
>   idmap backend = tdb2
>   private dir = /a/directory/on/your/cluster/filesystem
> It is vital that the private directory is on shared storage.)

LDAP should be fine...

> 2. I have got the git tree as mentioned on the CTDB pages; however it
> seems like 3.2.0pre1 will also support this; which should I go with?
> 3. Do I have to use IP takeover? All I am trying to do in this case is
> to consistently provide the home directories and profiles on both the
> PDC and BDC (I'm using GFS over iSCSI).
> It doesn't matter if the IP address of either box vanishes - since they
> are both domain controllers the still-living box should be used anyway
> (background - I am using "passdb expand explicit = yes" and in LDAP I
> have home and profile paths specified prefixed by \\%L, so the user's
> profile and home dir are mapped to whatever the logon server is for that
> session).
> I can see how for sharing domain member services around a cluster that
> IP takeover is required, but the PDC/BDC relationship means (IMHO) it's
> not required in this instance.

This looks like a perfectly good reason not to require IP takeover.

Andrew Bartlett

Andrew Bartlett
Authentication Developer, Samba Team           http://samba.org
Samba Developer, Red Hat Inc.
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