Re: [Samba] Replication Samba PDC to Samba BDC

David González Herrera - [DGHVoIP] Mon, 03 Jun 2013 23:59:40 -0700

On 6/4/2013 1:28 AM, Giedrius wrote:

2013.06.04 09:10, "David González Herrera - [DGHVoIP]" rašė:

On 6/3/2013 11:57 PM, Giedrius wrote:

Hi,


2013.06.04 04:16, "David González Herrera - [DGHVoIP]" rašė:

Hi,

Let's see if any of the questions gets answered or at least I get
ponte dto something that can help me.

I followed this wiki:
http://wiki.samba.org/index.php/Samba4/HOWTO/Join_a_domain_as_a_DC#Getting_ready_for_joining_Samba_as_a_DC_to_an_existing_domain

I have my S4 domain running, I compiled and installed another S4 to
replicate the first server and joined successfully to the domain but
replication seems to be broken.

Commandused:


root@bdc:~# samba-tool domain join mundo.local DC -Uadministrator
--realm=mundo.local --password=Mugr3P0pO --dns-backend=BIND9_DLZ
Finding a writeable DC for domain 'mundo.local'
Found DC samba.mundo.local
workgroup is mundo
realm is mundo.local
checking sAMAccountName
Adding CN=BDC,OU=Domain Controllers,DC=mundo,DC=local
Adding
CN=BDC,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mundo,DC=local
Adding CN=NTDS
Settings,CN=BDC,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mundo,DC=local
Adding SPNs to CN=BDC,OU=Domain Controllers,DC=mundo,DC=local
Setting account password for BDC$
Enabling account
Calling bare provision
No IPv6 address will be assigned
Provision OK for domain DN DC=mundo,DC=local
Starting replication
Schema-DN[CN=Schema,CN=Configuration,DC=mundo,DC=local]
objects[402/1550] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=mundo,DC=local]
objects[804/1550] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=mundo,DC=local]
objects[1206/1550] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=mundo,DC=local]
objects[1550/1550] linked_values[0/0]
Analyze and apply schema objects
Partition[CN=Configuration,DC=mundo,DC=local] objects[402/1614]
linked_values[0/0]
Partition[CN=Configuration,DC=mundo,DC=local] objects[804/1614]
linked_values[0/0]
Partition[CN=Configuration,DC=mundo,DC=local] objects[1206/1614]
linked_values[0/0]
Partition[CN=Configuration,DC=mundo,DC=local] objects[1608/1614]
linked_values[0/0]
Partition[CN=Configuration,DC=mundo,DC=local] objects[1614/1614]
linked_values[28/0]
Replicating critical objects from the base DN of the domain
Partition[DC=mundo,DC=local] objects[98/98] linked_values[31/0]
Partition[DC=mundo,DC=local] objects[336/238] linked_values[74/0]
Done with always replicated NC (base, config, schema)
Replicating DC=DomainDnsZones,DC=mundo,DC=local
Partition[DC=DomainDnsZones,DC=mundo,DC=local] objects[42/42]
linked_values[0/0]
Replicating DC=ForestDnsZones,DC=mundo,DC=local
Partition[DC=ForestDnsZones,DC=mundo,DC=local] objects[18/18]
linked_values[0/0]
Partition[DC=ForestDnsZones,DC=mundo,DC=local] objects[36/18]
linked_values[0/0]
Committing SAM database
Sending DsReplicateUpdateRefs for all the replicated partitions
Setting isSynchronized and dsServiceName
Setting up secrets database
Joined domain mundo (SID S-1-5-21-1918558401-2200574552-2151153235) as
a DC

Seemed to have succeded, then I radn the recommended tests

# ldbsearch -H /usr/local/samba/private/sam.ldb '(invocationid=*)'
--cross-ncs objectguid
# record 1
dn: CN=NTDS
Settings,CN=BDC,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mundo,DC=local
objectGUID: 7106cbf4-3cf6-4ed9-b019-dd937035b1e7

# record 2
dn: CN=NTDS
Settings,CN=SAMBA,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=mundo,DC=local
objectGUID: ad828198-a723-44c2-8d7f-d5f801e2849f

# returned 2 records
# 2 entries
# 0 referrals


These testes run from the BDC seem to work.

host -t CNAME ad828198-a723-44c2-8d7f-d5f801e2849f._msdcs.mundo.local
ad828198-a723-44c2-8d7f-d5f801e2849f._msdcs.mundo.local is an alias
for samba.mundo.local.

host -t CNAME 7106cbf4-3cf6-4ed9-b019-dd937035b1e7._msdcs.mundo.local
7106cbf4-3cf6-4ed9-b019-dd937035b1e7._msdcs.mundo.local is an alias
for bdc.mundo.local.

root@bdc:~# host -t A bdc.mundo.local.
bdc.mundo.local has address 10.10.10.20

root@bdc:~# host -t A samba.mundo.local.
samba.mundo.local has address 10.10.10.5


Error showing up on the BDC

dns child failed to find name
'ad828198-a723-44c2-8d7f-d5f801e2849f._msdcs.mundo.local' of type A
dreplsrv_notify: Failed to send DsReplicaSync to
ad828198-a723-44c2-8d7f-d5f801e2849f._msdcs.mundo.local for
CN=Configuration,DC=mundo,DC=local - *NT_STATUS_OBJECT_NAME_NOT_FOUND
: WERR_BADFILE *

Did you AT LEAST search the mailing list???????
Check if ping (or any program using GLIBC's *NSS* DNS resolver) can
resolve your 7106cbf4-3cf6-4ed9-b019-dd937035b1e7._msdcs.mundo.local name

Yes I searched the ML with no luck.

Yes, I did and it works, I had to add
7106cbf4-3cf6-4ed9-b019-dd937035b1e7._msdcs.mundo.loca lto /etc/hosts
and it works.

So I thinks it's a DNS issue.

Not exactly, as I wrote in my other posts to mailing list, this is
glibc's nss dns resolvers'  (libnss_dns.so) issue that is ignoring
hostnames with "_" (*_*msdcs)

Ok, then we'll have to wait for a patch to glibc, weird thing is that onthe master PDC with BIND_DLZ as backend there's no problem at all. Soexcuse my ignorance when it comes to that.


Thanks again mate.

Thanks for your answer.



--
David Gonzalez
DGHVoIP
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COL: +57.1.382.6718
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URL: www.dghvoip.com
Skype: davidgonzalezh
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Re: [Samba] Replication Samba PDC to Samba BDC

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