[Samba] Upgrading samba and OS - can I rejoin ?

Joachim Lindenberg samba at lindenberg.one
Mon Aug 26 12:44:10 UTC 2019

It is interesting to see two members of the Samba Team disagree. Though I really appreciate the support provided by Rowland a lot, I definitely favor Andrew´s "If  something isn't being cleaned up then that's a bug".
Best Regards, Joachim

-----Ursprüngliche Nachricht-----
Von: samba <samba-bounces at lists.samba.org> Im Auftrag von Rowland penny via samba
Gesendet: Monday, 26 August 2019 14:19
An: Andrew Bartlett <abartlet at samba.org>
Cc: samba at lists.samba.org
Betreff: Re: [Samba] Upgrading samba and OS - can I rejoin ?

On 26/08/2019 06:06, Andrew Bartlett via samba wrote:
> On Mon, 2019-08-26 at 06:54 +0200, gizmo via samba wrote:
>> And (re)joining is not recommended ?
> We do recommend it:
> https://wiki.samba.org/index.php/Upgrading_a_Samba_AD_DC
>> There are so many services and computers connected to the samba server, which are not in my hand.
>> Means after I upgraded all our 5 ADs I would have to inform many people about the new name and IP.
> The identifier that Rowland is worried about in terms of replication 
> behaviour is actually the invocationID, and we do not re-use that.
> This is actually a problem if this kind of re-join is done 
> often/automated, as objects in AD keep a list of every DC that every 
> existed on them!
> But for practical, humans scale operations it is fine.  We delete all 
> the other objects involved (server objects, DC objects etc).  If 
> something isn't being cleaned up then that's a bug, a rejoin with the 
> same name is normal in Samba.
> I trust this clarifies things,
> Andrew Bartlett
The problem is, if you try to join a DC with the same name as before, it doesn't work.

You need to demote the existing DC and then remove ALL mention of it from AD, this isn't a Samba thing, it is an AD thing.

 From the numerous problems that have been posted on this list about trying to rejoin a D with an existing name, the fix is obvious, always use a new name.


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