[Samba] Samba4 multiple DCs replication

[Julien TEHERY]

Le 22/11/2018 à 10:07, L.P.H. van Belle via samba a écrit :
> Hai Julien,
>
> Ah, ok, then im suspecting a regression bug here.
> For some reason somethings this happens, if you've had rebooted the servers, it would probely be fixed also.
>
> There where some older reports on this, but good to know its back or still there
> A manual run of : samba_dnsupdate --all-names --verbose
> Should/could helped to fix it also.
>
> And Thank you for the quick reply.
>
> Greetz,
>
> Louis
>

Ok, I try to reboot all the DCs juste to see what happens.
Then replication is still fine on the 3 main DCs (main site) with 
inbound/outbound neighbors, but now "samba-tool drs whowrepl" doesn't 
work anymore on 2 remote DCs.
Even they don't have outbound neighbors anymore.. :(

They have error like:

Failed to bind to uuid e3514235-4b06-11d1-ab04-00c04fc2dcd2 for 
ncacn_ip_tcp:192 
.168.174.1[1024,seal,target_hostname=dc1-site-02.mydomain.lan,abstract_syntax=e3 
514235-4b06-11d1-ab04-00c04fc2dcd2/0x00000004,localaddress=192.168.174.1] 
NT_STAT
US_IO_TIMEOUT

Yhen I looked in ldb with  ldbsearch -H /usr/local/samba/private/sam.ldb 
'(invocationId=*)' --cross-ncs objectguid
and saw doublons in it.

I ran dbcheck on all DCs, but it didn't cleared the obsoletes records.
I guess those doublons are here because I ran so many tests on this test 
domain (promote/demote)
Is there a way to clean it up ?


>> -----Oorspronkelijk bericht-----
>> Van: samba [mailto:samba-bounces at lists.samba.org] Namens
>> Julien TEHERY via samba
>> Verzonden: donderdag 22 november 2018 10:02
>> Aan: samba at lists.samba.org
>> Onderwerp: Re: [Samba] Samba4 multiple DCs replication
>>
>> Le 22/11/2018 à 09:58, L.P.H. van Belle via samba a écrit :
>>> Good its fixed now, but 1 question, just for me ..
>>>
>>> Did you reboot both servers or did you only restart/reload
>> the services.
>>>
>>> Greetz,
>>>
>>> Louis
>> I only restarted the services. (samba and bind). Maybe it wasn't
>> required, but I did it.
>>>    
>>>
>>>> -----Oorspronkelijk bericht-----
>>>> Van: samba [mailto:samba-bounces at lists.samba.org] Namens
>>>> Julien TEHERY via samba
>>>> Verzonden: donderdag 22 november 2018 9:35
>>>> Aan: samba at lists.samba.org
>>>> Onderwerp: Re: [Samba] Samba4 multiple DCs replication
>>>>
>>>> Le 22/11/2018 à 08:38, Julien TEHERY via samba a écrit :
>>>>> Le 21/11/2018 à 17:47, Rowland Penny via samba a écrit :
>>>>>> On Wed, 21 Nov 2018 17:33:28 +0100
>>>>>> Julien TEHERY via samba <samba at lists.samba.org> wrote:
>>>>>>
>>>>>>> Another thing, I see that only DC1 has OUTBOUND NEIGHBORS
>>>> (all failed
>>>>>>> with an WERR_FILE_NOT_FOUND error)
>>>>>>> All the other DCs have only an INBOUND NEIGHBORS and no OUTBOUND
>>>>>>> NEIGHBORS
>>>>>> You have problems, all DC's at a site should replicate to
>>>> each other
>>>>>> and there should be replication between sites. Is
>> something like a
>>>>>> firewall getting in the way ?
>>>>>>
>>>>>> Have you checked the AD databases ?
>>>>>>
>>>>>> Rowland
>>>>> There is no firewall between the  3 DCs on the main site (same
>>>>> subnet), however there are no outbound neighbors on DC2 and DC3
>>>>> replication status
>>>>> An yes AD db have been checked.
>>>>>
>>>>>
>>>> Know what, I just found out the problem.
>>>> CNAME records were missing, according to
>>>> https://wiki.samba.org/index.php/Verifying_and_Creating_a_DC_D
>>>> NS_Record
>>>> I addes them, restarted both samba and bind, and then all
>> inbound and
>>>> outbound connections appeared,
>>>>
>>>>
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>>
>>
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>