[Samba] Samba4 Secondary DC as Backup DC (redundancy)

[Daniel Carrasco Marín]

El 23/6/2015 8:11 p. m., "Rowland Penny" <rowlandpenny at googlemail.com>
escribió:
>
> On 23/06/15 18:58, Daniel Carrasco Marín wrote:
>>
>> Hi,
>>
>> I've sucessfull created a secondary DC using the wiki manual (
>> https://wiki.samba.org/index.php/Join_a_domain_as_a_DC), and is working
>> perfectly, user and groups are synced on both and I can use any of them
for
>> login using clients like Owncloud, Prosody, python scripts...
>>
>> Now my question is: ¿how I can use that secondary DC as backup when the
>> main fails?.
>>
>> I've tried to disable the main AD daemon but clients don't try to connet
to
>> secondary DC, then all fails...
>>
>> Greetings and Thanks!!
>
>
> OK, how do the clients get their ipaddress etc, is this by DHCP or do
they have static addresses ?
>
> If it is by DHCP, then the dhcp server needs to push out both DCs as
nameservers, if static, then each client needs to be set to use both DCs as
nameservers.
>
> The DCs need to be set to use each other as nameservers, falling back to
themselves in case of failure i.e. /etc/resolv.conf needs to be this:
>
> search samdom.example.com
> nameserver 192.168.0.3
> nameserver 192.168.0.2
>
> Where 'samdom.example.com' is your domain name
> 192.168.0.3 is the other DC
> 192.168.0.2 is the DC this /etc/resolv.conf is on
>
> Swap the two nameserver on the other DC.
>
> Rowland
>
>
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I see. I'll take a look tomorrow.

I'm migrating an old samba domain, then for now i've clients with mixed
DHCP (ip by DHCP, but DNS is static).

Thanks!!