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Re: [Samba] Setup a Samba AD DC as an additional DC

On Fri, 23 Nov 2018 08:20:42 +0000
"Barry D. Adkins via samba" <samba@xxxxxxxxxxxxxxx> wrote:

> Samba 4.7.6 Ubuntu
> /etc/hosts:
>       localhost.localdomain   localhost
> ::1             localhost6.localdomain6 localhost6
> # The following lines are desirable for IPv6 capable hosts
> ::1     localhost ip6-localhost ip6-loopback
> fe00::0 ip6-localnet
> ff02::1 ip6-allnodes
> ff02::2 ip6-allrouters
> ff02::3 ip6-allhosts

Change the top two lines to: localhost
::1       localhost6

Then add a line:


> /etc/resolv.conf:
> # This file is managed by man:systemd-resolved(8). Do not edit.
> #
> # This is a dynamic resolv.conf file for connecting local clients to
> the # internal DNS stub resolver of systemd-resolved. This file lists
> all # configured search domains.
> #
> # Run "systemd-resolve --status" to see details about the uplink DNS
> servers # currently in use.
> #
> # Third party programs must not access this file directly, but only
> through the # symlink at /etc/resolv.conf. To manage
> man:resolv.conf(5) in a different way, # replace this symlink by a
> static file or a different symlink. #
> # See man:systemd-resolved.service(8) for details about the supported
> modes of # operation for /etc/resolv.conf.
> nameserver

Stop systemd-resolved from managing /etc/resolv.conf (in fact, stop

Then create a new /etc/resolv.conf:

nameserver AN_EXISTING_AD_DC

Once the DC is joined, change the 'nameserver' line to point the new
DC's ipaddress i.e. itself

> /etc/krb5.conf:
> [libdefaults]
>         default_realm = DARAM.COM
> #        dns_lookup_realm = false
> #        dns_lookup_kdc = true

You only need the four lines above, uncomment the last two

> All suggestions failed.
> I modified the last suggestion.. I had to add the -U option because
> there is no user in the DOMAIN for the UNIX user that is running the
> command.

Unless the 'UNIX user' is root (or you are using sudo), the unix user
shouldn't be running the command.

> :~$ samba-tool domain join daram.com DC --dns-backend=SAMBA_INTERNAL
> --realm=DOMAIN.COM -U"DOMAIN\administrator" Finding a writeable DC
> for domain 'domain.com' Found DC DC01.daram.com
> Password for [DOMAIN\administrator]:
> workgroup is DOMAIN
> realm is domain.com
> Adding CN=DCU1801,OU=Domain Controllers,DC=domain,DC=com
> Adding
> CN=DCU1801,CN=Servers,CN=MySite,CN=Sites,CN=Configuration,DC=domain,DC=com
> Adding CN=NTDS
> Settings,CN=DCU1801,CN=Servers,CN=MySite,CN=Sites,CN=Configuration,DC=domain,DC=com
> Adding SPNs to CN=DCU1801,OU=Domain Controllers,DC=domain,DC=com
> Setting account password for DCU1801$ Enabling account Calling bare
> provision Join failed - cleaning up
> Deleted CN=DCU1801,OU=Domain Controllers,DC=domain,DC=com
> Deleted CN=NTDS
> Settings,CN=DCU1801,CN=Servers,CN=MySite,CN=Sites,CN=Configuration,DC=domain,DC=com
> Deleted
> CN=DCU1801,CN=Servers,CN=MySite,CN=Sites,CN=Configuration,DC=domain,DC=com
> ERROR(<class 'samba.provision.ProvisioningError'>): uncaught
> exception - ProvisioningError: guess_names: 'server role=standalone
> server' in /etc/samba/smb.conf must match chosen server role 'active
> directory domain controller'!  Please remove the smb.conf file and
> let provision generate it File

Do what it tells you, remove the existing smb.conf

> I am happy to install a different version of Samba, however, I would
> rather not have to compile Samaba.  Moreover, I'd have to uninstall
> the current Samba Version.  However, if easier, I'd just reinstall
> Ubuntu.  Guidance for this would be appreciated.

As you are are using Ubuntu 18.04, you could just install Louis's Samba
packages. They will install over and replace your existing Samba


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