prevent clustering when server role = ad dc?

[Taylor, Jonn]

On 01/22/2013 07:11 AM, Andrew Bartlett wrote:
> 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
>
I filled an enhancement bug for making ldb aware of ctdb.

https://bugzilla.samba.org/show_bug.cgi?id=9583

Jonn