[Samba] Replace primary DC

[Luis Peromarta]

Hi Adnan,

Your steps look correct.

There are no “secondary” or “primary” DCs. All equal except for FSMO roles.

http://samba.bigbird.es/doku.php?id=samba:fsmo-roles

You do not need to back up sysvol or idmap as they should be already synced with other DCs.

http://samba.bigbird.es/doku.php?id=samba:sync-sysvol
http://samba.bigbird.es/doku.php?id=samba:sync-idmap.ldb

Regards, LP
On 28 Apr 2025 at 17:39 +0100, Adnan R. via samba <samba at lists.samba.org>, wrote:
> Following this thread:
> https://lists.samba.org/archive/samba/2025-April/251400.html
>
> We currently have 3 Samba (dc2, dc3, dc4) currently installed as
> secondaries for dc1, they are installed from debian 12 backports while
> dc1 is from a Turnkey Linux using an old version of samba, webmin,
> etc...
>
> I'm thinking about reinstalling to homogenize the infra. Is this the
> right way to do it:
> - Transfer FSMO from dc1 to dc2 (or another), backing up idmap.ldb and sysvol
> - Demote and shutdown dc1, removing any leftovers from dc1 in LDAP and DNS
> - Reinstall dc1
> - Put back sysvol and idmap.ldb
> - Transfer back FSMO to dc1
>
> Thanks
> --
> Regards, Adnan R
>
> --
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