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Re: [Samba] Samba4 multiple DCs replication




Hai, 

Reboot the remote servers also or login and run : samba_dnsupdate --all-names --verbose
samba-tool dbcheck --fix or samba-tool dbcheck --fix --cross-nc

Greetz, 

Louis



> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces@xxxxxxxxxxxxxxx] Namens 
> Julien TEHERY via samba
> Verzonden: donderdag 22 november 2018 11:54
> Aan: samba@xxxxxxxxxxxxxxx
> Onderwerp: Re: [Samba] Samba4 multiple DCs replication
> 
> 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@xxxxxxxxxxxxxxx] Namens
> >> Julien TEHERY via samba
> >> Verzonden: donderdag 22 november 2018 10:02
> >> Aan: samba@xxxxxxxxxxxxxxx
> >> 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@xxxxxxxxxxxxxxx] Namens
> >>>> Julien TEHERY via samba
> >>>> Verzonden: donderdag 22 november 2018 9:35
> >>>> Aan: samba@xxxxxxxxxxxxxxx
> >>>> 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@xxxxxxxxxxxxxxx> 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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> >
> 
> 
> 
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