[Samba] Can't find machine account

[Robert A Wooldridge]

On 07/18/2019 10:20 AM, Rowland penny via samba wrote:
> I think this could be one of your problems, not entirely sure, but I 
> think the minimum function level reliably required is 2003, you may 
> have to remove that fileserver.
No joy.  I was able to demote that file server using: samba-tool domain 
demote -Uadministrator

And then I promoted the DC to Server 2003 level.  But attempting to join 
the new samba DC failed with the same error:

Adding DNS A record ATHENA.edm-inc.com for IPv4 IP: 10.10.1.10
Join failed - cleaning up
ldb_wrap open of secrets.ldb
Could not find machine account in secrets database: Failed to fetch 
machine account password for EDM from both secrets.ldb (Could not find 
entry to match filter: '(&(flatname=EDM)(objectclass=primaryDomain))' 
base: 'cn=Primary Domains': No such object: dsdb_search at 
../source4/dsdb/common/util.c:4705) and from 
/var/lib/samba/private/secrets.tdb: NT_STATUS_CANT_ACCESS_DOMAIN_INFO
Deleted CN=RID Set,CN=ATHENA,OU=Domain Controllers,DC=edm-inc,DC=com
Deleted CN=ATHENA,OU=Domain Controllers,DC=edm-inc,DC=com
Deleted CN=NTDS 
Settings,CN=ATHENA,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=edm-inc,DC=com
Deleted 
CN=ATHENA,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=edm-inc,DC=com
ERROR(runtime): uncaught exception - (9003, 
'WERR_DNS_ERROR_RCODE_NAME_ERROR')
   File "/usr/lib/python2.7/dist-packages/samba/netcmd/__init__.py", 
line 177, in _run
     return self.run(*args, **kwargs)
   File "/usr/lib/python2.7/dist-packages/samba/netcmd/domain.py", line 
716, in run
     backend_store=backend_store)
   File "/usr/lib/python2.7/dist-packages/samba/join.py", line 1501, in 
join_DC
     ctx.do_join()
   File "/usr/lib/python2.7/dist-packages/samba/join.py", line 1406, in 
do_join
     ctx.join_add_dns_records()
   File "/usr/lib/python2.7/dist-packages/samba/join.py", line 1143, in 
join_add_dns_records
     dns_partition=domaindns_zone_dn)
   File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 1057, in 
dns_lookup
     dns_partition=dns_partition)


-- 
Bob Wooldridge
EDM Incorporated