[Samba] Samba 4 Bind DNS on CentOS 7

Fri Aug 21 06:02:42 UTC 2015

On 2015-08-21 16:30, John Gardeniers wrote:
> Hi Mike,
> 
> I wonder if I'm missing the file because I only did a classicupgrade,
> rather than a provision and perhaps then the file(s) is/are not
> created.
> 
> regards,
> John
> 
> 
> On 21/08/15 13:45, Brady, Mike wrote:
>> On 2015-08-21 14:11, Brady, Mike wrote:
>>> 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
>> 
>> Immediately after installation /var/lib/samba/private is empty. So 
>> everything in it is "generated", I assume by the provision.
>> 
>> 

John

The files are all there when I do a classic upgrade.  I am working on a 
project to just that at the moment.

When you did the classic upgrade did you do it with the 
--dns-backend-BIND9_DLZ option?

If not you could try doing

samba_upgradedns --dns-backend=SAMBA_INTERNAL
samba_upgradedns --dns-backend=BIND9_DLZ

too see if that forces the files to generate.

Regards

Mike