[Kea-users] Multiple dns-server in kea-dhcp-ddns server
Francis Dupont
fdupont at isc.org
Sun Nov 4 12:53:22 UTC 2018
Tim Weippert writes:
> Hi list,
>
> i configured two dns-servers within a forward-ddns domain in kea-dhcp-ddns:
>
> "forward-ddns" : {
> "ddns-domains": [
> {
> "name": "<domain-name>.",
> "key-name": "DHCP-Update-Key",
> "dns-servers": [
> { "ip-address": "172.18.20.1" },
> { "ip-address": "127.0.0.1" }
>
> ]
> }
> ]
> },
>
> as i understand the documentation, kea-dhcp-ddns should send the updates to b
> oth dns-servers,
=> not sure: dynamic updates are propagated between servers so it is
enough to send to the first working one.
> but it seem to use only the first one.
=> this is what I expect from the DNS point of view.
> I would like to change my master DNS Server to another system/product an
> d keep both in sync for some time.
=> it is a DNS problem: if you don't try a multi-master setup with
a server software which does not explitely support it there should
be no issue: as I said dynamic updates are propagated between servers
(or they fail) so things with a sane setup can't go out of sync.
> Is this a misunderstanding from my side or is there something wrong with the
> configuration?
=> misunderstanding. Simply look at the DNS server documentation about
dynamic updates.
Regards
Francis.Dupont at fdupont.fr
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