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

[Rowland Penny]

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

Rowland