[Samba] 4.9.x -> 4.10.x : any major things to consider?

[Stefan G. Weichinger]

Am 26.11.19 um 20:53 schrieb Stefan G. Weichinger via samba:
> Am 26.11.19 um 20:50 schrieb Rowland penny via samba:
>> On 26/11/2019 19:44, Stefan G. Weichinger via samba wrote:
>>> Am 26.11.19 um 20:39 schrieb Rowland penny via samba:
>>>
>>>>> I assume I have to start over: demote that DC2 etc
>>>>>
>>>>> Should have left office when I could an hour ago.
>>>>>
>>>> Definitely sounds like you should, you are probably tired and it is
>>>> easy  to make mistakes when you are tired.
>>> So you suggest to let the domain run on ADC1 only ... and do the
>>> demoting etc tmrw ?
>>>
>>> Sounds right. Although it would also feel good to fix it before bed.
>>>
>>>
>>>
>> If the domain is going to get little use overnight, then yes, you could
>> do this, but I was really referring to not doing things when you are
>> tired ;-)
>>
>> If you are going to let the domain run overnight on one DC, then I would
>> demote the second DC before you go home ;-)
> 
> I *am* at home, that's even more sad ;-)
> 
> And why not "rejoin" as well ... ?

I think I won't demote right now and just leave it as it is. So far the
shares etc work fine ...

the samba-ad-dc.service doesn't even start so I assume it won't make
much difference (no communication anyway)? I could shutdown the whole
server.

-

I plan to demote DC2 ("adc2"= hostname) remotely tomorrow.

After that I would like to learn how to re-add it.

https://wiki.samba.org/index.php/Demoting_a_Samba_AD_DC#Demoting_an_Offline_Domain_Controller

says:

"You must not reconnect a DC to the network, that was demoted remotely.
Your AD can get inconsistent."

which scares me a bit. What does that mean exactly? I have to reconnect
with the same old hostname, but is it sufficient if I clear
adc2:/var/lib/samba before to make it a brandnew machine?

thanks all, good night and good backups