[Samba] Floating IP breaks AD replication

Rowland penny rpenny at samba.org
Mon Nov 23 17:29:30 UTC 2020

On 23/11/2020 16:50, Sven Wick via samba wrote:
>> You cannot use CTDB with AD DCs
> You can.

OK, I will change that to 'Do not use CTDB with Samba AD DCs'

A cluster is where all the same data is stored on multiple computers but 
they act as if they were just one computer, which funnily enough is what 
Samba AD dc's do, so you are wrapping something that acts like one 
computer inside something that acts like one computer.

That is a very simplistic view of clusters, but I am sure you get my 
drift, so I cannot recommend using CTDB with Samba AD DC's.

> This setup allows me to upgrade, reboot
> each DC without downtime because
> ctdb checks for samba and moves the floating IP.

Your DC's really should have fixed IP's, I cannot recommend anyone using 
your method.


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