[Samba] Failover DC did not work when Main DC failed

[Paul Littlefield]

On 11/02/2020 23:33, Kris Lou via samba wrote:
> Is DC4 listed in in an A record for your mycompany.com?
> 
> Do logs show that it's answering requests during the course of a normal
> workday?
> 
> If so ... time to simulate DC3 failure, I guess.

Hi Kris,

Thanks for taking the time to reply.

I've been using Samba for what seems like a lifetime and it's only by sheer fluke that this "bug / situation" was found where either Samba DC AD is not correct and/or the QNAP server does not like talking to the Samba 4 domain when one of the DCs is not available!

In answer to your questions...

Yes, DC4 is listed in an A record.

Which log file can I check, for either AD or DNS requests?

Yes, indeed... I am going to create 2 DC VMs on my laptop and turn one off to see what happens.

Stay tuned.

Regards,

-- 

Paul Littlefield

Telephone: 07801 125705
Email: info at paully.co.uk
Wiki: http://wiki.indie-it.com/wiki/Special:AllPages
LinkedIn: https://www.linkedin.com/in/paullittlefield

Paul Littlefield is environmentally responsible. Please consider the environment before printing this email. This email and any attachment is intended for the named addressee only, or person authorised to receive it on their behalf. The content should be treated as confidential and the recipient may not disclose this message or any attachment to anyone else without authorisation. If this transmission is received in error please notify the sender immediately and delete this message from your email system. All electronic transmissions to and from me are recorded and may be monitored. Finally, the recipient should check this email and any attachments for viruses. Paul Littlefield accepts no liability for any damage caused by any virus transmitted by this email.

Ubuntu 18.04.3 LTS (x86_64)

Tmesis is a linguistic phenomenon in which a word or phrase is separated into two parts, with other words interrupting between them... well, abso-blooming-lutely.