[Samba] Unable to join a DC to a Site that doesn't already have a DC in that subnet

lp101 lingpanda101 at gmail.com
Tue Jun 24 12:07:23 MDT 2014


Any workaround if using the internal DNS to move sites?

On 6/24/2014 1:08 PM, Davor Vusir wrote:
> Hi again!
>
> If you use BIND9_DLZ, try change/convert to BIND9_FLATFILE and you
> will be able to create and rename Sites and move DC:s to the newly
> created Site.
>
> Regards
> Davor
>
>
> 2014-06-18 20:40 GMT+02:00 Davor Vusir <davortvusir at gmail.com>:
>> 2014-06-18 10:28 GMT+02:00 Chris Alavoine <chrisa at acs-info.co.uk>:
>>> Hi all,
>>>
>>> Am having problems adding a new DC to a Site that doesn't already have a DC
>>> in the same subnet. Whenever I try and do a domain join specifying a nearby
>>> DC in a different subnet I get this:
>>>
>>> ERROR(runtime): uncaught exception - (-1073741643, 'NT_STATUS_IO_TIMEOUT')
>>>    File
>>> "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/__init__.py",
>>> line 175, in _run
>>>      return self.run(*args, **kwargs)
>>>    File
>>> "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/domain.py", line
>>> 552, in run
>>>      machinepass=machinepass, use_ntvfs=use_ntvfs, dns_backend=dns_backend)
>>>    File "/usr/local/samba/lib/python2.7/site-packages/samba/join.py", line
>>> 1172, in join_DC
>>>      ctx.do_join()
>>>    File "/usr/local/samba/lib/python2.7/site-packages/samba/join.py", line
>>> 1082, in do_join
>>>      ctx.join_finalise()
>>>    File "/usr/local/samba/lib/python2.7/site-packages/samba/join.py", line
>>> 881, in join_finalise
>>>      ctx.send_DsReplicaUpdateRefs(nc)
>>>    File "/usr/local/samba/lib/python2.7/site-packages/samba/join.py", line
>>> 866, in send_DsReplicaUpdateRefs
>>>      ctx.drsuapi.DsReplicaUpdateRefs(ctx.drsuapi_handle, 1, r)
>>>
>>> I have managed to join a DC to a Site that already has a DC in that subnet
>>> (although not in that Site).
>>>
>>> Can anyone think of a workaround for this?
>>>
>>> This is my join statement (names changed to protect the innocent):
>>>
>>> /usr/local/samba/bin/samba-tool domain join essence.internal.com DC
>>> -UAdministrator --realm=example.com --server=remotedc.example.com
>>> --site=local
>>>
>>>
>>> I am trying to do this due to the bug that doesn't allow the manual moving
>>> of DC's to new Sites by using the ADSS drag and drop method.
>>>
>> Hi Chris!
>>
>> Actually there is a way. If you use a DNS that does not reside on the
>> DC's but standalone, the manual moving works.
>>
>> As a start I put the following RRs in a static dns: A, ptr and 'basic' SRV RR
>> _gc._tcp, _kerberos._tcp, _kerberos._tcp, _kerberos._udp,
>> _kpasswd._tcp, _kpasswd._udp, _ldap._tcp, _ldap._tcp.dc._msdcs,
>> _ldap._tcp.gc._msdcs, _ldap._tcp.pdc._msdcs.
>>
>> That ended in following errors in syslog (amongst others):
>>
>> [2014/06/18 11:56:36.078267, 3]
>> ../source4/libcli/resolve/dns_ex.c:492(pipe_handler)
>>   dns child failed to find name
>> '5d6f52ac-640c-4dc1-a84b-42aac923d256._msdcs.example.org' of type A.
>>
>> All SRV RR for a DC have to be present in DNS. But I have had no time
>> to test it. And I have not tested multiple subnets.
>>
>> My guess is that the bug is DNS related or the account that makes the
>> changes cannot edit the AD database. And that results in that no SRV
>> RR are added/changed and the MMC eventually times out.
>>
>> Regards
>> Davor
>>
>>   Thanks,
>>> Chris.
>>>
>>>
>>>
>>> --
>>> ACS (Alavoine Computer Services Ltd)
>>> Chris Alavoine
>>> mob +44 (0)7724 710 730
>>> www.alavoinecs.co.uk
>>> http://twitter.com/#!/alavoinecs
>>> http://www.linkedin.com/pub/chris-alavoine/39/606/192
>>> --
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>>> instructions:  https://lists.samba.org/mailman/options/samba

-- 
-James



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