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Lorenzo Milesi

2023-Mar-08 11:07 UTC

[Samba] Unable to "rejoin" existing DC after upgrade (infamous WERR_FILE_NOT_FOUND)

Hi. 
As happened some weeks ago, here I am again updating an old Samba 4.14.x network
to a current version. The server hosting the FSMO roles is a Debian10 with
4.14.14, while the third node is a Ubuntu 18 running LinuxSchools build 4.14.8.

We started from a Ubuntu 20.04 server running Louis builds. We demoted the node
and joined it back to the domain with 4.17.5 from Michael. Although on the node
itself everything seemed ok, the DC didn't appear in DNS, while visible in
Sites and ADUC.
Replication is reported as ALL GOOD on the upgraded node, but the remote ones
are in error with WERR_FILE_NOT_FOUND.

We enabled drs_repl log on the 4.14.8, pasting below.
It seems failing because it cannot find the DNS records, which it cannot have
because replication is not working. If I run
dig 3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan @zimbraip
it returns the correct value, while the same command against any of the two
other DCs fails. But maybe this is not the root cause of the problem.

samba_dnsupdate ran without errors on the 4.17 node, but the other DCs never
received those DNS records.

What else can we check?
thanks


# conf on 4.14.8
[global]
        netbios name = ZIMBRA
        realm = DOMAIN.LAN
        server role = active directory domain controller
        workgroup = DOM
        server services = -dns
        allow dns updates = disabled
        interfaces = tun0 lo
        log level = 1 drs_repl:10

[sysvol]
        path = /var/lib/samba/sysvol
        read only = No

[netlogon]
        path = /var/lib/samba/sysvol/domain.lan/scripts
        read only = No

# conf on newly upgraded 4.17.5
[global]
        interfaces = tun0 lo
        netbios name = NEXTCLOUD
        realm = DOMAIN.LAN
        server role = active directory domain controller
        workgroup = DOM

        log level = 1 drs_repl:10
[sysvol]
        path = /var/lib/samba/sysvol
        read only = No

[netlogon]
        path = /var/lib/samba/sysvol/domain.lan/scripts
        read only = No

# log excerpt from 4.14.8 - zimbra node
[2023/03/08 11:53:48.764405, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=true) uSN=0:27662
[2023/03/08 11:53:48.764675, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
CN=Schema,CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=false)
uSN=0:26357
[2023/03/08 11:53:48.764748,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
DC=DomainDnsZones,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:48.764766, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:467(dreplsrv_notify_schedule)
  dreplsrv_notify_schedule: dreplsrv_notify_schedule(5) scheduled for: Wed Mar 
8 11:53:54 2023 CET
[2023/03/08 11:53:48.809115,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
DC=DomainDnsZones,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:48.813994,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:48.850673,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
CN=Configuration,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:48.855475,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:48.893889,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for DC=domain,DC=lan -
NT_STATUS_OBJECT_NAME_NOT_FOUND : WERR_FILE_NOT_FOUND
[2023/03/08 11:53:48.899875,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
CN=Schema,CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:48.938349,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
CN=Schema,CN=Configuration,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:53.771482, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
DC=DomainDnsZones,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=false)
uSN=0:27611
[2023/03/08 11:53:53.771874, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=true) uSN=0:27663
[2023/03/08 11:53:53.772186, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=true) uSN=0:27662
[2023/03/08 11:53:53.772458, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
CN=Schema,CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=false)
uSN=0:26357
[2023/03/08 11:53:53.772526,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
DC=DomainDnsZones,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:53.772544, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:467(dreplsrv_notify_schedule)
  dreplsrv_notify_schedule: dreplsrv_notify_schedule(5) scheduled for: Wed Mar 
8 11:53:59 2023 CET
[2023/03/08 11:53:53.811887,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
DC=DomainDnsZones,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:53.817975,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:53.856681,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
CN=Configuration,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:53.862628,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:53.901447,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for DC=domain,DC=lan -
NT_STATUS_OBJECT_NAME_NOT_FOUND : WERR_FILE_NOT_FOUND
[2023/03/08 11:53:53.909327,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
CN=Schema,CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:53.958106,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
CN=Schema,CN=Configuration,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:58.779502, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
DC=DomainDnsZones,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=false)
uSN=0:27611
[2023/03/08 11:53:58.779901, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=true) uSN=0:27663
[2023/03/08 11:53:58.780205, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=true) uSN=0:27662
[2023/03/08 11:53:58.780522, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
  dreplsrv_notify_check: queued DsReplicaSync for
CN=Schema,CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=false)
uSN=0:26357
[2023/03/08 11:53:58.780594,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
DC=DomainDnsZones,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:58.780658, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:467(dreplsrv_notify_schedule)
  dreplsrv_notify_schedule: dreplsrv_notify_schedule(5) scheduled for: Wed Mar 
8 11:54:04 2023 CET
[2023/03/08 11:53:58.823771,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
DC=DomainDnsZones,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:58.829798,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:58.874287,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
CN=Configuration,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND
[2023/03/08 11:53:58.879552,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:58.918491,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for DC=domain,DC=lan -
NT_STATUS_OBJECT_NAME_NOT_FOUND : WERR_FILE_NOT_FOUND
[2023/03/08 11:53:58.927320,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:247(dreplsrv_notify_run_ops)
  dreplsrv_notify_run_ops: started DsReplicaSync for
CN=Schema,CN=Configuration,DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan
[2023/03/08 11:53:58.965872,  5, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:199(dreplsrv_notify_op_callback)
  dreplsrv_notify_op_callback: dreplsrv_notify: Failed to send DsReplicaSync to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan for
CN=Schema,CN=Configuration,DC=domain,DC=lan - NT_STATUS_OBJECT_NAME_NOT_FOUND :
WERR_FILE_NOT_FOUND


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Lorenzo Milesi - lorenzo.milesi at yetopen.com 
CTO @ YetOpen Srl

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2023-Mar-08 11:56 UTC

head link

[Samba] Unable to "rejoin" existing DC after upgrade (infamous WERR_FILE_NOT_FOUND)

On 08/03/2023 11:07, Lorenzo Milesi via samba wrote:> Hi.
> As happened some weeks ago, here I am again updating an old Samba 4.14.x
network to a current version. The server hosting the FSMO roles is a Debian10
with 4.14.14, while the third node is a Ubuntu 18 running LinuxSchools build
4.14.8.
> 
> We started from a Ubuntu 20.04 server running Louis builds. We demoted the
node and joined it back to the domain with 4.17.5 from Michael. Although on the
node itself everything seemed ok, the DC didn't appear in DNS, while visible
in Sites and ADUC.
> Replication is reported as ALL GOOD on the upgraded node, but the remote
ones are in error with WERR_FILE_NOT_FOUND.
> 
> We enabled drs_repl log on the 4.14.8, pasting below.
> It seems failing because it cannot find the DNS records, which it cannot
have because replication is not working. If I run
> dig 3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan @zimbraip
> it returns the correct value, while the same command against any of the two
other DCs fails. But maybe this is not the root cause of the problem.
> 
> samba_dnsupdate ran without errors on the 4.17 node, but the other DCs
never received those DNS records.
> 
> What else can we check?
> thanks
> 
> 
> # conf on 4.14.8
> [global]
>          netbios name = ZIMBRA
>          realm = DOMAIN.LAN
>          server role = active directory domain controller
>          workgroup = DOM
>          server services = -dns
>          allow dns updates = disabled
>          interfaces = tun0 lo
>          log level = 1 drs_repl:10
> 
> [sysvol]
>          path = /var/lib/samba/sysvol
>          read only = No
> 
> [netlogon]
>          path = /var/lib/samba/sysvol/domain.lan/scripts
>          read only = No
> 
> # conf on newly upgraded 4.17.5
> [global]
>          interfaces = tun0 lo
>          netbios name = NEXTCLOUD
>          realm = DOMAIN.LAN
>          server role = active directory domain controller
>          workgroup = DOM
> 
>          log level = 1 drs_repl:10
> [sysvol]
>          path = /var/lib/samba/sysvol
>          read only = No
> 
> [netlogon]
>          path = /var/lib/samba/sysvol/domain.lan/scripts
>          read only = No
> 
> # log excerpt from 4.14.8 - zimbra node
> [2023/03/08 11:53:48.764405, 10, pid=4709, effective(0, 0), real(0, 0),
class=drs_repl]
../../source4/dsdb/repl/drepl_notify.c:391(dreplsrv_notify_check)
>    dreplsrv_notify_check: queued DsReplicaSync for DC=domain,DC=lan to
3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan (urgent=true) uSN=0:27662
It looks like it is trying to replicate to the GUID representation of a 
DC, if you check the DC objects you should find SPN's like this:

servicePrincipalName: 
ldap/3fa4ff9a-7fdc-4912-ad73-08b98f6bf347._msdcs.domain.lan

Each DC should have a similar SPN, but with a different GUID and the 
GUID will probably be a part of other SPN's in each DC object.

Do any of your current DC's use that GUID 
(3fa4ff9a-7fdc-4912-ad73-08b98f6bf347) ?

Rowland

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