[Samba] DNS issues after upgrade

Anantha Raghava raghav at exzatechconsulting.com
Tue Jan 23 13:52:02 UTC 2018

Hello Rowland,

I simulated the environment in my test setup.

First installed Bind9 (9.9.4) from CentOS 7.3 repositories and then 
installed Samba Version 4.6.5 from sources. All services started 
normally. All configuration files are replaced with the one shared with 
you, without making any changes you suggested.

Then upgraded to 4.7.1 as we tried in production setup. Compiled version 
4.7.1 from sources and installed. I also did not make any changes to 
conf files. Left them as they were without making any changes you 
suggested. All services started normally and all services were running. 
Replication was also perfect. No issues with DB as well.

Upgraded from 4.7.1 to 4.7.3 and finally to 4.7.4. No issues at all. All 
services are working perfectly. No issues with DB as well.

Now it is really perplexing as to what really went wrong in the 
production setup. The only difference between the production setup and 
my test setup is my test setup is a VM whereas the production setup is 
having 2 physical servers. CentOS version in production setup is 7.3 and 
in test setup the CentOS version is 7.4. Barring these two, there is 
really no difference.

Really wondering as to what really went wrong in the production setup 
that broke all 4 servers and we had to revert back 4.6.5.

Any clues?


Thanks & Regards,

Anantha Raghava

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On 22/01/18 9:15 PM, Rowland Penny via samba wrote:
> On Mon, 22 Jan 2018 20:49:59 +0530
> Anantha Raghava via samba <samba at lists.samba.org> wrote:
>> Hi Rowland / Denis,
>> Thanks for your quick reply. Find below smb.conf and named.conf for
>> your reference.
> I would change the 'options' part of named.conf to this:
> options {
>           directory       "/var/named";
>           dump-file       "/var/named/data/cache_dump.db";
>           statistics-file "/var/named/data/named_stats.txt";
>           memstatistics-file "/var/named/data/named_mem_stats.txt";
>           allow-query     { any; };
>           forwarders {
>                   172.##.###.10; //***** internal DNS 1
>                   172.##.###.90; //****** internal DNS 2
>           };
>           allow-transfer { none; };
>           dnssec-enable no;
>           dnssec-validation no;
>           listen-on port 53 { any; };
>           listen-on-v6 port 53 { none; };
>           pid-file "/run/named/named.pid";
>           tkey-gssapi-keytab "/usr/local/samba/private/dns.keytab";
> };
> Rowland

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