prevent clustering when server role = ad dc?

[Andrew Bartlett]

On Tue, 2013-01-22 at 10:20 +1100, Amitay Isaacs wrote:
> On Tue, Jan 22, 2013 at 10:09 AM, Taylor, Jonn <jonnt at taylortelephone.com>wrote:
> 
> >
> > On 01/21/2013 04:46 PM, Andrew Bartlett wrote:
> >
> >> On Mon, 2013-01-21 at 15:41 -0600, Taylor, Jonn wrote:
> >>
> >>> On 01/20/2013 08:18 PM, Martin Schwenke wrote:
> >>>
> >>>> On Mon, 14 Jan 2013 17:27:52 -0600, "Christopher R. Hertel"
> >>>> <crh at ubiqx.mn.org> wrote:
> >>>>
> >>>>  On 01/14/2013 05:06 PM, Amitay Isaacs wrote:
> >>>>>
> >>>>>> So
> >>>>>> CTDB branch 1.13 (CTDB version 1.44) is now completely defunct and
> >>>>>> should
> >>>>>> not be used. I would prefer to do regular releases of CTDB 2.x (time
> >>>>>> permitting). Currently 2.x releases are done from master which makes
> >>>>>> it
> >>>>>> easier to manage.
> >>>>>>
> >>>>> With my vendor hat on (and you know what color that is), I need to be
> >>>>> able
> >>>>> to identify a release of CTDB to ship with products.  I can back-port
> >>>>> fixes,
> >>>>> as needed, but I need a foundation from which to work.
> >>>>>
> >>>> There isn't much (any?) feature development being done.  Most of
> >>>> the changes we're making are bug fixes, performance improvements or
> >>>> code cleanups to improve maintainability.
> >>>>
> >>> What are the plans for CTDB to be used on a AD DC cluster on the new
> >>> 4.0? I currently am running a 2 node cluster (samba 3.6+CTDB, DRDB
> >>> active/active on CentOS5) that I would like to upgrade to 4.0 with AD
> >>> but the notes say that this is not recommended.
> >>>
> >> Correct, you don't mix CTDB replication with the AD replication used in
> >> the AD DC.
> >>
> >> If you are using CTDB, then your data is important enough to afford
> >> distinct servers for your AD DC.  The two replication schemes cannot be
> >> combined, they are at different layers.
> >>
> > Correct, I understand that. I am only interested in files server part to
> > be on CTDB.
> >
> > dc1 = samba 4 AD DC
> > dc2 = samba 4 AD DC
> > SHR01 = CTDB(DC1 and DC2 fileserver)
> >
> > Is this possible? Otherwise I am looking at a XEN cluster/active failover
> > with DRBD
> >
> >
> >> You can of course use CTDB with a Samba 4.0 file server, in the same way
> >> you can replicate a Samba 3.6 file server.
> >>
> >> The CTDB folks can fill you in on the status of CTDB with Samba 4.0, but
> >> I understand it is fully supported.
> >>
> >> Andrew Bartlett
> >>
> >>
> >
> As mentioned by Andrew, do not use CTDB for samba4 AD.  If you are using a
> same server for AD and file server, then you should not use CTDB.  You can
> use CTDB with samba4 file server when it's a member server.

We should probably add an assertion in loadparm that turns off the AD DC
when clustering is enabled or vice verca. 

Andrew Bartlett

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org