[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 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