Trouble demoting DC with broken replication

Andreas Oster aoster at novanetwork.de
Thu May 8 07:06:14 MDT 2014


Am 08.05.2014 15:03, schrieb Andreas Oster:
> Hi all,
> 
> I am currently struggling to remove one of our Samba4 DC from the
> domain. Some time ago, adding a new Samba DC to our AD did not succeed
> and I had to demote the new server again. After removal, replication on
> one of the old/existing DCs got weird.
> 
> /usr/local/samba/bin/samba-tool drs showrepl   gives the following:
> 
> Standardname-des-ersten-Standorts\dc02
> DSA Options: 0x00000001
> DSA object GUID: ef37f4de-a03c-493c-96f6-e521a5415d81
> DSA invocationId: b0bc10b9-a67f-4550-8fbf-3dc9fbe6fecc
> 
> ==== INBOUND NEIGHBORS ====
> 
> DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ Thu May  8 14:49:28 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:49:28 2014 CEST
> 
> DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ Thu May  8 14:49:24 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:49:24 2014 CEST
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ Thu May  8 14:48:50 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:48:50 2014 CEST
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ Thu May  8 14:48:51 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:48:51 2014 CEST
> 
> CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ Thu May  8 14:48:54 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:48:54 2014 CEST
> 
> CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ Thu May  8 14:48:55 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:48:55 2014 CEST
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ Thu May  8 14:50:01 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:50:01 2014 CEST
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ Thu May  8 14:50:02 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:50:02 2014 CEST
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ Thu May  8 14:48:56 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:48:56 2014 CEST
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ Thu May  8 14:48:56 2014 CEST was successful
>                 0 consecutive failure(s).
>                 Last success @ Thu May  8 14:48:56 2014 CEST
> 
> ==== OUTBOUND NEIGHBORS ====
> 
> DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:23db6774-c155-4e5f-a793-07e9c772ddc4,CN=dc03\0ADEL:bb22ce3e-2d94-47e2-aa29-11a2a0e4e2f3,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 23db6774-c155-4e5f-a793-07e9c772ddc4
>                 Last attempt @ Thu May  8 14:51:59 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 1042908 consecutive failure(s).
>                 Last success @ Tue Feb 11 10:00:38 2014 CET
> 
> DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:1a890c41-4326-47c1-90c0-28f8e70801a7,CN=dc03\0ADEL:60bb6abe-2d08-4f5f-81db-787f6e23706b,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 1a890c41-4326-47c1-90c0-28f8e70801a7
>                 Last attempt @ Thu May  8 14:51:59 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 1005465 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:8c0461e2-6f72-42be-98ab-ce175fc84653,CN=dc03\0ADEL:619df70c-abc9-4644-bff6-35809664bbd9,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 8c0461e2-6f72-42be-98ab-ce175fc84653
>                 Last attempt @ Thu May  8 14:51:59 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 958484 consecutive failure(s).
>                 Last success @ Sat Feb 15 12:56:47 2014 CET
> 
> DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:23db6774-c155-4e5f-a793-07e9c772ddc4,CN=dc03\0ADEL:bb22ce3e-2d94-47e2-aa29-11a2a0e4e2f3,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 23db6774-c155-4e5f-a793-07e9c772ddc4
>                 Last attempt @ Thu May  8 14:51:58 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 1049436 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:1a890c41-4326-47c1-90c0-28f8e70801a7,CN=dc03\0ADEL:60bb6abe-2d08-4f5f-81db-787f6e23706b,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 1a890c41-4326-47c1-90c0-28f8e70801a7
>                 Last attempt @ Thu May  8 14:51:58 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 1012985 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:8c0461e2-6f72-42be-98ab-ce175fc84653,CN=dc03\0ADEL:619df70c-abc9-4644-bff6-35809664bbd9,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 8c0461e2-6f72-42be-98ab-ce175fc84653
>                 Last attempt @ Thu May  8 14:51:58 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 976997 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=ForestDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Configuration,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:23db6774-c155-4e5f-a793-07e9c772ddc4,CN=dc03\0ADEL:bb22ce3e-2d94-47e2-aa29-11a2a0e4e2f3,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 23db6774-c155-4e5f-a793-07e9c772ddc4
>                 Last attempt @ Thu May  8 14:52:00 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 999198 consecutive failure(s).
>                 Last success @ Tue Feb 11 10:00:39 2014 CET
> 
> CN=Configuration,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:1a890c41-4326-47c1-90c0-28f8e70801a7,CN=dc03\0ADEL:60bb6abe-2d08-4f5f-81db-787f6e23706b,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 1a890c41-4326-47c1-90c0-28f8e70801a7
>                 Last attempt @ Thu May  8 14:52:00 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 994163 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Configuration,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:8c0461e2-6f72-42be-98ab-ce175fc84653,CN=dc03\0ADEL:619df70c-abc9-4644-bff6-35809664bbd9,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 8c0461e2-6f72-42be-98ab-ce175fc84653
>                 Last attempt @ Thu May  8 14:52:00 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 952835 consecutive failure(s).
>                 Last success @ Sat Feb 15 12:56:42 2014 CET
> 
> CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:23db6774-c155-4e5f-a793-07e9c772ddc4,CN=dc03\0ADEL:bb22ce3e-2d94-47e2-aa29-11a2a0e4e2f3,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 23db6774-c155-4e5f-a793-07e9c772ddc4
>                 Last attempt @ Thu May  8 14:51:58 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 1009552 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:1a890c41-4326-47c1-90c0-28f8e70801a7,CN=dc03\0ADEL:60bb6abe-2d08-4f5f-81db-787f6e23706b,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 1a890c41-4326-47c1-90c0-28f8e70801a7
>                 Last attempt @ Thu May  8 14:51:58 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 1010074 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:8c0461e2-6f72-42be-98ab-ce175fc84653,CN=dc03\0ADEL:619df70c-abc9-4644-bff6-35809664bbd9,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 8c0461e2-6f72-42be-98ab-ce175fc84653
>                 Last attempt @ Thu May  8 14:51:59 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 958577 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> DC=DomainDnsZones,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:23db6774-c155-4e5f-a793-07e9c772ddc4,CN=dc03\0ADEL:bb22ce3e-2d94-47e2-aa29-11a2a0e4e2f3,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 23db6774-c155-4e5f-a793-07e9c772ddc4
>                 Last attempt @ Thu May  8 14:52:00 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 975813 consecutive failure(s).
>                 Last success @ Tue Feb 11 10:00:39 2014 CET
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:1a890c41-4326-47c1-90c0-28f8e70801a7,CN=dc03\0ADEL:60bb6abe-2d08-4f5f-81db-787f6e23706b,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 1a890c41-4326-47c1-90c0-28f8e70801a7
>                 Last attempt @ Thu May  8 14:52:00 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 955526 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         NTDS DN: CN=NTDS
> Settings\0ADEL:8c0461e2-6f72-42be-98ab-ce175fc84653,CN=dc03\0ADEL:619df70c-abc9-4644-bff6-35809664bbd9,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 DSA object GUID: 8c0461e2-6f72-42be-98ab-ce175fc84653
>                 Last attempt @ Thu May  8 14:52:01 2014 CEST failed,
> result 2 (WERR_BADFILE)
>                 892435 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc03 via RPC
>                 DSA object GUID: 94534f65-5d06-41f5-844d-a58a0bc03c93
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> CN=Schema,CN=Configuration,DC=samdom,DC=loc
>         Standardname-des-ersten-Standorts\dc01 via RPC
>                 DSA object GUID: c60bca82-df6e-409e-85c5-e2cc733691da
>                 Last attempt @ NTTIME(0) was successful
>                 0 consecutive failure(s).
>                 Last success @ NTTIME(0)
> 
> ==== KCC CONNECTION OBJECTS ====
> 
> Connection --
>         Connection name: 7027ea76-3617-488d-90f6-93f73de15c79
>         Enabled        : TRUE
>         Server DNS name : dc01.samdom.loc
>         Server DN name  : CN=NTDS
> Settings,CN=dc01,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 TransportType: RPC
>                 options: 0x00000001
> Warning: No NC replicated for Connection!
> Connection --
>         Connection name: dc03
>         Enabled        : TRUE
>         Server DNS name : dc03.samdom.loc
>         Server DN name  : CN=NTDS
> Settings,CN=dc03,CN=Servers,CN=Standardname-des-ersten-Standorts,CN=Sites,CN=Configuration,DC=samdom,DC=loc
>                 TransportType: RPC
>                 options: 0x00000000
> Warning: No NC replicated for Connection!
> 
> 
> The \0ADEL:  entries are the remains of the initial failed join of dc03.
> I searched the net for a solution to get rid of those entries but did
> not find any useful information. My next idea was to also demote dc02.
> Unfortunately after demoting dc02 those \0ADEL: entries showed up on
> dc01, but only for dc02. I took VM snapshots before demoting dc02 so
> could easily switch back.
> 
> Does anyone have an idea how to resolve this issue ?
> 
> Thank you very much for your kind help
> 
> best regards
> 
> Andreas
> 

Hi all,

by the way Samba version is: Version 4.2.0pre1-GIT-d7c22d5

Thanks

best regards

Andreas



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