[Samba] Samba 4 Bind DNS on CentOS 7

Brady, Mike mike.brady at devnull.net.nz
Fri Aug 21 02:11:57 UTC 2015


On 2015-08-21 12:52, John Gardeniers wrote:
> Hi Brady,
> 
> I realise that but the only named.conf to be found on the system is my
> newly created /etc/named.conf. Either something screwed up when
> installing the Sernet RPMs, which is really pretty unlikely given that
> everything else is working, or the file was not included in the
> package.
> 
> regards,
> John
> 
> 
> On 21/08/15 10:16, Brady, Mike wrote:
>> On 2015-08-21 11:18, John Gardeniers wrote:
>>> Can anyone point me to instruction for setting up Bind to work with
>>> Samba 4 on CentOS 7? I know there are some instruction at
>>> https://wiki.samba.org/index.php/DNS_Backend_BIND but they're
>>> incomplete when using the Sernet repo. In particular, it refers to
>>> 'include "/usr/local/samba/private/named.conf";' but that file 
>>> doesn't
>>> exist at any location on my system.
>>> 
>>> Is this a generic file that I can copy from some other
>>> place/system/person, or is it a dynamically generated, system
>>> specific, file created during the install? I thought I might be able
>>> to set up an Ubuntu server and grab it from there but, like CentOS,
>>> samba-ad doesn't exist in the standard repos, which puts me back at
>>> Sernet, with nothing gained. Is there a distro which actually has
>>> samba-ad in the standard repos?
>>> 
>>> regards,
>>> John
>> Sernet packages on Centos 7 use /var/lib/samba/private for those 
>> files.
>> 

John

I have multiple Sernet 4.2/Centos 7 DC installed using Bind and they all 
have a /var/lib/samba/private/named.conf.  I do not know if the 
named.conf is installed by the package or is generated.  The file isn't 
owned by any package, so I assume that it is generated by either the 
provision or when configuring the DC to use Bind.

That particular file is not unique to each install.  For CentOS 7 it 
contains

>>>>>>>>>>>>>>> Cut <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
# This DNS configuration is for BIND 9.8.0 or later with dlz_dlopen 
support.
#
# This file should be included in your main BIND configuration file
#
# For example with
# include "/var/lib/samba/private/named.conf";

#
# This configures dynamically loadable zones (DLZ) from AD schema
# Uncomment only single database line, depending on your BIND version
#
dlz "AD DNS Zone" {
     # For BIND 9.8.x
     # database "dlopen /usr/lib64/samba/bind9/dlz_bind9.so";

     # For BIND 9.9.x
      database "dlopen /usr/lib64/samba/bind9/dlz_bind9_9.so";

     # For BIND 9.10.x
     # database "dlopen /usr/lib64/samba/bind9/dlz_bind9_10.so";
};
>>>>>>>>>>>>>>> Cut <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

but if you do not have the file, then there is something wrong with your 
install and/or provision and you may may well be missing other files.

My /var/lib/samba/private contains

[root at dc03 private]# ll
total 14536
drwxrwx--- 3 root  named    4096 Aug  3 11:48 dns
-rw------- 1 named named     862 Jun 18 13:19 dns.keytab
-rw------- 1 root  root     2073 Jun  3 12:26 dns_update_cache
-rw-r--r-- 1 root  root     3183 Jun  3 12:17 dns_update_list
-rw------- 1 root  root  1286144 Jun  3 12:17 hklm.ldb
-rw------- 1 root  root  3366912 Aug  3 12:33 idmap.ldb
-rw------- 1 root  root  1609728 Jun 17 11:15 idmap.ldb.old
-rw-r--r-- 1 root  root      101 Jun  3 12:17 krb5.conf
srwxrwxrwx 1 root  root        0 Aug 18 16:01 ldapi
drwxr-x--- 2 root  root     4096 Aug 18 16:01 ldap_priv
-rw-r--r-- 1 root  root      633 Jun 18 13:19 named.conf
-r--r--r-- 1 root  root      310 Jul  2 11:00 named.conf.update
-rw-r--r-- 1 root  root     2090 Jun 18 13:19 named.txt
-rw------- 1 root  root      696 Aug 18 16:01 netlogon_creds_cli.tdb
-rw------- 1 root  root  1286144 Jun  3 12:17 privilege.ldb
-rw------- 1 root  root      696 Jun  3 12:26 randseed.tdb
-rw------- 1 root  root  4247552 Jun  3 12:17 sam.ldb
drwxr-x--- 2 root  named    4096 Aug  3 11:48 sam.ldb.d
-rw------- 1 root  root    24576 Aug 21 13:39 schannel_store.tdb
-rw------- 1 root  root     1237 Jun  3 12:17 secrets.keytab
-rw------- 1 root  root  1286144 Jun 18 13:19 secrets.ldb
-rw------- 1 root  root   425984 Jun  3 12:26 secrets.tdb
-rw------- 1 root  root  1286144 Jun  3 11:41 share.ldb
drwxr-xr-x 3 root  root     4096 Jun  3 12:26 smbd.tmp
-rw-r--r-- 1 root  root      955 Jun  3 12:17 spn_update_list
drwx------ 2 root  root     4096 Jun  3 12:26 tls


I will be installing (but not provisioning) a couple of new DCs in a 
couple of hours from now.  I will have a look and see if the file is 
deployed as part of the install.

Regards

Mike



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