[Samba] Migrate OLD PDC on Centos5 to Centos6

[Marc Muehlfeld]

Hi Alberto,

Am 07.04.2017 um 22:30 schrieb Alberto Moreno via samba:
> I have a old server running our PDC(NT4 Style) with Centos 5+samba 3x+LDAP
> as backend.
>
> I want to move this setup to Centos 6.
>
> Some one running this layout under Centos6 without issue?
>
> I don't want to right now to work with AD style yet, no time for testing.

I understand if people have a reason no to migrate to Samba AD, but why 
do you move from an EOL RHEL version to one that is almost 7 years old? 
RHEL6 enters next month Production Phase 3 (only security update and 
urgent priority bug fixes). At the latest in 3 years, you have to 
upgrade to RHEL7 or later, because RHEL6 will then reach its EOL.

In case you consider switching to RHEL 6 is because it contains Samba 3 
packages, I just wanted to make sure that you know: Samba 4.x _does not_ 
mean you must migrate to AD. See 
https://wiki.samba.org/index.php/Updating_Samba#Misconceptions_About_Samba_4

Regarding your migration scenario (the short version):
- Read the release notes of Samba versions you skipped. Parameters, etc. 
may have changed their defaults or have been removed in the meantime.
- Export the LDAP database.
- Back up your smb.conf and Samba databases.
- Turn of the old PDC.
- Install the new OS. Use the same host name and IP to keep things simple.
- Restore your /etc/openldap/slapd.conf (remove /etc/openldap/slapd.d/, 
if it exists).
- Import the LDAP database.
- Restore smb.conf and the Samba databases to the correpsonding 
directories (I /guess/ the locations did not change).
- Start Samba
- Check the log files for errors
- Testing!


Regards,
Marc