[Samba] Add samba AD DC to a Windows 2008 R2 domain

[Carlos Jesus]

Hello all,
I could use some advice on setting up this project.
I have a small W2k8-R2 domain with a single DC. It runs great in spite of
its age.
However, the redundancy of the system is, of course, low.
I was thinking of adding a 2nd DC. I can either get a cheap W2k8 license
from amazon, or set up a samba DC. Running a "samba only" domain is not an
option. Not my call....

When reading
https://wiki.samba.org/index.php/Joining_a_Windows_Server_2008_/_2008_R2_DC_to_a_Samba_AD
I see that "There be dragons!"
How gnarly would these dragons be? Any advice?

If it's feasible, some details where I could use some advice:
1) internal_DNS or bind9?
2) dhcp dns_update would work? I don't see why it shouldn't but still...
3) dhcp load balancing would work? I guess not.
4) Anything else you guys can think of...

Thanks for all the help
Best regards

CJ