[Samba] Upgrading from old 4.1 sernet-samba AD to source release with AD

[Neil]

Hi Andrew,

Sorry for the late reply. Thank you for the assistance. I'm starting to get
going on this this week.
Just to clarify a few things please...

You said...
"I would install by package or source Samba 4.5 onto one of the hosts,
pointing at the same paths, then join a modern Samba version to that
domain from another host.  That much should work."

When you say install it onto a host, you mean an existing 4.1 VM?

Also the paths do you mean specify /var/lib/samba ?

Will this not overwrite or change any of my data currently in this folder?
It currently looks as follows...

-rw-------   1 root root  421888 Aug 19  2014 account_policy.tdb
drwxr-xr-x   4 root root    4096 Aug 19  2014 data
drwxr-xr-x  11 root root    4096 Oct 13  2015 drivers
drwxr-xr-x   2 root root    4096 Oct 13  2015 netlogon
drwxr-x---   2 root ntp     4096 Jun  8 00:00 ntp_signd
drwxr-xr-x   2 root root    4096 Oct 13  2015 printing
drwxr-x---   6 root root    4096 Jun  8 13:55 private
drwxr-xr-x   2 root root    4096 Oct 13  2015 profiles
-rw-------   1 root root  528384 Aug 19  2014 registry.tdb
-rw-------   1 root root  421888 May  5 11:03 share_info.tdb
drwxrwx---+  3 root  544    4096 Mar  9  2017 sysvol
drwxr-x---   2 root root    4096 Jun  8 00:00 winbindd_privileged

All 5 of my DC's are all part of the same domain, so I'm confused how I can
choose to join this one with a modern Samba version.

Apologies for all the questions.

Thank you.

Regards.

Neil Wilson.



On Wed, May 27, 2020 at 5:05 PM Andrew Bartlett <abartlet at samba.org> wrote:

> On Wed, 2020-05-27 at 16:53 +0200, Neil via samba wrote:
> > Hi guys,
> >
> > I have sernet-samba-client-4.1.21-11.el6.x86_64 with 5 DC's running
> > in AD
> > mode and I need to look at upgrading them to the latest source
> > version of
> > Samba with AD support. All servers are running Centos 6.x and the
> > same
> > Samba release.
> >
> > I see the Wiki mentions "Upgrade A DC and join it to the domain
> > again"
> > however I'm not sure in terms of upgrading how this process will take
> > place
> > considering I'm going from the old sernet package to the source
> > compiled
> > version, what version should I be upgrading to from 4.1.x etc?
> >
> > Do I rather somehow install new DC's running the latest release, and
> > then
> > join them to the domain and then demote the old ones and then finally
> > decommission them?
> >
> > Alternatively if I compile a similar 4.1.x source version onto the
> > existing
> > VM's and then upgrade through all the source versions one by one from
> > there
> > on all 5 of my VM's? EG: 4.1 to 4.2 to 4.3 to 4.4... etc?
> >
> > Any suggestions on this is hugely appreciated.
>
> I would install by package or source Samba 4.5 onto one of the hosts,
> pointing at the same paths, then join a modern Samba version to that
> domain from another host.  That much should work.
>
> You won't get a modern Samba to directly join Samba 4.1 unless you are
> very lucky with the ordering of your objects (see the other thread on
> this).
>
> Andrew Bartlett
>
> > Thank you
> >
> > Regards.
> >
> > Neil Wilson.
> --
> Andrew Bartlett                       https://samba.org/~abartlet/
> Authentication Developer, Samba Team  https://samba.org
> Samba Developer, Catalyst IT
> https://catalyst.net.nz/services/samba
>
>
>
>