[Samba] testing upgrades in containers?

[Stefan G. Weichinger]

Am 27.11.18 um 21:16 schrieb Andrew Bartlett via samba:
> On Tue, 2018-11-27 at 21:05 +0100, Reindl Harald via samba wrote:
>> why don't you just use real virtual machines?
>>
>> * clone
>> * test
> 
> Because if it connects to the network there will be chaos. 

I expected this somehow ;-)

> Samba 4.9 can back up an existing domain and restore it with a new name
> to test in the lab.  This is the safe way to test upgrades, which
> should in general be done on a join/demote basis not in-place if at all
> possible.

Is there / could we get a nice howto for this somewhere?

Thanks, Stefan