[Samba] ODP: Primary DC migration / upgrade

Krzysztof Kucybała krzysieq at hotmail.com
Tue Dec 7 16:37:50 UTC 2021

Thanks for the reply,
I considered Rasberry Pi, but I want this box to also keep a backup hdd that will rsync from a NAS box that I have that runs network shares among lots of other things (the primary dc VM as well which is a bit problematic). Gearing a Pi4b to do that will cost me a fair bit more than the simplest AMD SoC mobo with a few required gizmos, and arguably it will be less customizable.

So You're saying there'd be no harm keeping the VM aside but pointing all members at the physical box as primary destination?
Od: samba <samba-bounces at lists.samba.org> w imieniu użytkownika Rowland Penny via samba <samba at lists.samba.org>
Wysłane: wtorek, 7 grudnia 2021 17:24
Do: samba at lists.samba.org <samba at lists.samba.org>
Temat: Re: [Samba] Primary DC migration / upgrade

On Tue, 2021-12-07 at 16:02 +0000, Krzysztof Kucybała via samba wrote:
> Hi all,
> I'm contemplating a possible change to my home domain that currently
> spins off a primary dc running on a virtualbox VM. I want to buy a
> very simple set of components to build a cheap tiny yet physical
> server to host the dc.

You could do what I do, run your Samba AD DC's on raspberry pi 4b's and
use Louis Van Belle's Samba repo, see here:


>  When that happens, what would the correct approach be towards
> migrating? Does the below make any sense assuming the new physical
> will run Debian Bullseye which has a slightly newer samba version
> compared to the current VM running Debian Buster:
>   1.  connect the new physical box as secondary domain controller ->
> I would assume this will cause it to replicate whatever is in the
> primary


>   2.  switch their roles so that vm becomes secondary, physical
> becomes primary

Nearly, except there are no primary or secondary DC's in AD, they are
all just DC's and any DC can hold the FSMO roles. In fact, if you have
seven DC's, they could each hold an FSMO role. So which would be the
'primary' ??

>   3.  turn off the VM leaving just one DC in the domain (or not, not
> sure if it's worthwhile to keep a secondary DC in a domain as small
> as mine)

You would have to demote the old DC, not just turn it off and it is
always better to have more than one DC.

> Is this going to work, and if so - is this the recommended approach?

Yes and yes.


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