[Samba] Migrating samba4 dc from an instance with static/external dns to a fresh install with dynamic/internal dns

[Lukasz Zalewski]

> On 8 Sep 2016, at 15:11, Rowland Penny via samba <samba at lists.samba.org> wrote:
> 
> On Thu, 8 Sep 2016 11:45:37 +0000
> Lukasz Zalewski via samba <samba at lists.samba.org> wrote:
> 
>> 
>>> On 8 Sep 2016, at 14:04, Rowland Penny via samba
>>> <samba at lists.samba.org> wrote:
>>> 
>>> On Thu, 8 Sep 2016 10:50:20 +0000
>>> Lukasz Zalewski via samba <samba at lists.samba.org> wrote:
>>> 
>>>> 
>>>>> On 8 Sep 2016, at 11:34, Rowland Penny via samba
>>>>> <samba at lists.samba.org> wrote:
>>>>> 
>>>>> On Thu, 8 Sep 2016 07:19:34 +0000
>>>>> Lukasz Zalewski via samba <samba at lists.samba.org> wrote:
>>>>> 
>>>>>> Dear list,
>>>>>> 
>>>>>> I want to migrate our existing samba4 dc with a static/external
>>>>>> dns backend, to a new install with internal dynamic dns backend. 
>>>>>> 
>>>>>> Given:
>>>>>> DC1 - existing samba4 dc with static/external dns running quite
>>>>>> old build (to be updated to version 4.3 before the migration
>>>>>> starts) DC2
>>>>>> - new samba4 dc with internal dynamic dns (running 4.3 version)
>>>>>> 
>>>>> 
>>>>> Transfer all FSMO roles to DC2, demote DC1, turn off DC1,
>>>>> re-install DC1 with a different name, join it as a new DC.
>>>>> 
>>>> 
>>>> Hi Rowland,
>>>> My plan is to completely retire DC1 after this migration is
>>>> completed.
>>>> 
>>>> What I’m not sure is how to perform the initial joining of the DC2
>>>> given the current dns set-up.
>>>> 
>>>> Do I just join DC2 to the domain using samba-tool domain join  
>>>> and then manually add the missing dns domain records (for bot DC1
>>>> and DC2) to DC2’s dns? Would that be enough?
>>>> 
>>>> My ultimate goal is to move the data over from DC1 to DC2 and also
>>>> convert from the static/external dns set up to the internal/dynamic
>>>> one.
>>>> 
>>>> Regards
>>>> 
>>>> Lukasz
>>>> 
>>> 
>>> Does DC2 have all the required records ? if it does, then what I
>>> posted earlier should work, but if you have missing dns records,
>>> then running samba_upgradedns should create them.
>>> 
>> 
>> Hi Rowland,
>> 
>> DC2 does not exist yet. I’m assuming that I should not provision it
>> first, but run domain join and then samba_upgradedns after the join?
>> 
>> Cheers
>> 
>> L
>> 
> 
> No, you shouldn't provision it, use 'samba-tool domain join', see:
> 
> https://wiki.samba.org/index.php/Join_an_additional_Samba_DC_to_an_existing_Active_Directory
> 

I shall try this and let you know.

Thanks for your help.

L