[Samba] "Failed to find a writeable DC for domain" joining to win2k3 AD DC

[Kevin Field]

Sorry, I didn't realize we were carrying on off-list.  Figured it 
out--had been giving samba-tool the hostname for both domain and realm, 
rather than, hmm, the domain and realm.  (I think because in my case my 
domain and realm have two parts, unlike the HOWTO where they have 
three...confusion.)  Works great now!  Even without the new DC in 
resolv.conf nor "domain ..." in there either, just "search ..." and 
"nameserver [olddc]".  Thanks for your help Daniel, hope this point 
helps someone else too.

On 2013-08-14 1:51 AM, � wrote:
> Look at your /etc/resolv.conf
> There should be an entry of your existing DC in it ex.: nameserver
> your.existing.dc
> And you should be able to ping the existing DC.
>
> Greetings
> Daniel
>
> -----------------------------------------------
> EDV Daniel M�ller
>
> Leitung EDV
> Tropenklinik Paul-Lechler-Krankenhaus
> Paul-Lechler-Str. 24
> 72076 T�bingen
>
> Tel.: 07071/206-463, Fax: 07071/206-499
> eMail: mueller at tropenklinik.de
> Internet: www.tropenklinik.de
> -----------------------------------------------
> -----Urspr�ngliche Nachricht-----
> Von: samba-bounces at lists.samba.org [mailto:samba-bounces at lists.samba.org] Im
> Auftrag von Kevin Field
> Gesendet: Dienstag, 13. August 2013 16:15
> An: samba at lists.samba.org
> Betreff: [Samba] �Failed to find a writeable DC for domain� joining to
> win2k3 AD DC
>
> I have a CentOS 6.4 box with SerNet's Samba 4.0.8 installed and no smb.conf
> file yet, as it should be. I want it to become an AD DC in my existing
> Windows domain, replicating from the existing Windows Server
> 2003 box. I have SELinux enabled and want it to stay that way.
>
> I'm getting this error trying to run samba-tool:
>
> $ sudo samba-tool domain join currentwindowsadserver.mydomain.lan DC
> -Uadministrator --realm=currentwindowsadserver.mydomain.lan
> Finding a writeable DC for domain 'currentwindowsadserver.mydomain.lan'
> ERROR(exception): uncaught exception - Failed to find a writeable DC for
> domain 'currentwindowsadserver.mydomain.lan'
>     File "/usr/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
> line 175, in _run
>       return self.run(*args, **kwargs)
>     File "/usr/lib64/python2.6/site-packages/samba/netcmd/domain.py",
> line 552, in run
>       machinepass=machinepass, use_ntvfs=use_ntvfs, dns_backend=dns_backend)
>     File "/usr/lib64/python2.6/site-packages/samba/join.py", line 1082, in
> join_DC
>       machinepass, use_ntvfs, dns_backend, promote_existing)
>     File "/usr/lib64/python2.6/site-packages/samba/join.py", line 73, in
> __init__
>       ctx.server = ctx.find_dc(domain)
>     File "/usr/lib64/python2.6/site-packages/samba/join.py", line 246, in
> find_dc
>       raise Exception("Failed to find a writeable DC for domain '%s'" %
> domain)
>
> I have a StackExchange thread open with all the things I've tried changing
> and all the things I've verified so far:
>
> http://unix.stackexchange.com/questions/86516/samba-4-gives-failed-to-find-a
> -writeable-dc-for-domain-on-samba-tool-domain-jo
>
> I'd appreciate any pointers.  I seem to have run out of things to try.
>
> Thanks,
> Kev
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