[Samba] Disaster Recovery Activity with Samba-AD-DC

[Anantha Raghava]

Hi,

We are having totally 5 samba-ad servers (2 servers in "Data Center A" 
and 3 in "Data Center B") in our setup providing AD services.

We have been having trouble whenever we do an activity called "DR 
Activity" during which we bring down 2 servers in "Data Center - A" and 
try to run our entire infrastructure with 3 samba-ad severs in "Data 
Center B".

DNS is Samba Internal DNS.

Whenever we do this activity, we find that DNS queries and hence the 
authentication times out, causing major issues in our setup. We find 
that even logs are not getting printed in the servers in Data Center B. 
Surprising part is when restart other 2 servers in Data Center A, all 
things go normal.

All 5 servers have the same configuration - 8 Core CPU, 64 GB RAM and 5 
Gbps NIC, RHEL 8.x OS.

It is also observed that 1 of the servers in Data Center B has 1 server 
in Data Center A as replication partner. This causes the replication 
also to all over whenever we do this mandatory activity. every month and 
every month we fail in this activity we have an audit remark.

May I request the community to advice how to go about trouble shooting 
this situation?

-- 

Thanks & Regards,

Anantha Raghava H A


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