[Samba] Transfer samba to another machine

[Konstantin Boyandin]

On 07.09.2018 11:43, Andrew Bartlett wrote:
> On Fri, 2018-09-07 at 11:06 +0700, Konstantin Boyandin via samba wrote:
>> Andrew Bartlett via samba wrote 2018-09-06 17:33:
>>> On Thu, 2018-09-06 at 11:50 +0200, Slim Ontario via samba wrote:
>>>> Hi,
>>>>
>>>> I've a migrated samba-ad on my test-machine. Is it possible to
>>>> transfer the
>>>> samba directory (stored under /var/lib/samba) to another machine/my
>>>> productive system?
>>>> I would to these steps:
>>>> - install samba and dependencies on new host
>>>> - transfer my /var/lib/samba, /etc/krb5.conf and /etc/samba
>>>> - start samba service
>>>>
>>>> Do I have other things to consider?
>>>
>>> We generally prefer folks to join a new DC to the domain, transfer
>>> roles, sync sysvol and then demote, as this allows you to try out the
>>> new DC before the old one is gone.
>>>
>>> However if you must, the above is OK if you keep the same 'netbios
>>> name' and don't run both at the same time.
>>
>> Is there a "dump/restore" method, instead of copying the Samba database 
>> files (which means I must stop Samba for the duration of copying)?
> 
> If you don't want to stop Samba, then join the second DC.  Otherwise if
> Samba is still running, the copy will be out of date.
> 
> There is a dump/restore method in Samba 4.9 (see below) but still, it
> will be out of date as soon as it is taken, so just join the domain.

I see, thanks. I plan to have two DCs online, so I could put them down
for maintenance one by one, without stopping entire domain services over
network.

Actually, I was asking about something different. ATM, in Samba 3 NT4
domain (LDAP backend) I can do the below to manage the domain data:
- export data with slapcat
- do whatever I need with the above dump (if necessary) and load them
again with slapadd

The above is very convenient - when domain data were damaged, I could
fix the human-readable dump and re-load it to bring things back in order.

Is something similar available for Samba 4 (below 4.9)? Dump data in
human readable format and re-import when necessary?

Thanks.

Sincerely,
Konstantin