[Samba] Questions about 2n dc and samba update

[Rowland penny]

On 05/09/2019 09:37, Trenta sis via samba wrote:
> Hi,
>
> I have to upgrade 2 different samba AD DC (2 domains) from 4.4.5 to 4.10.7
>
> First is a single server and updaded with in-place upgrade from 4.4.5
> to 4.10.7 and all perfect
>
> Second environment I need to add a second dc and also upgrade existing
> server, and I have some question about how to do this:
> - join second domain server with 4.10.7
> - then make in place upgrade on existing server dc1?
I would add the second DC, then once you are sure everything is OK, 
demote the first DC, install new version of Samba, then re-join it to 
the domain.
>
> reading wiki I'm not sure if rejoin is needed or not, as I have
> described recently I have update an existing 4.4.5 (also fileserver)
> with in-place method and all weems to work...
>
> About second domain controller I have question bout dns config,
> reading wiki amb not clear about what is the suggested
> /etc/resolv.conf on both dc
>
> dc1
> dc1 ipdc1
> dc2 ipdc2
>
> dc2
> dc2 ipdc2
> dc1 ipdc1


Each DC should use its own IP has its first nameserver

Rowland