[Samba] Dynamic Updates to Bind DLZ through DHCP have repeated errors in syslog

[ralph strebbing]

Alright. I'll see what I can do regarding the actual DNS Update
functionality.

What of the failure message stemming from the lack of result code? When I
tried tracking down what could be causing it, I was under the impression it
wasn't able to make the ReverseDNS calls. Any suggestions to that point?

On Thu, Jan 28, 2021 at 9:31 AM Rowland penny via samba <
samba at lists.samba.org> wrote:

> On 28/01/2021 14:10, ralph strebbing via samba wrote:
> > Thanks for the advice Rowland, we're now running Samba 4.13.3, and I've
> > updated the script with the one you've provided. The problem I'm running
> > into now is when a client get a DHCP lease, it adds it to DNS, and then
> we
> > create a static mapping after the fact for a different IP (This is common
> > here especially while testing some server VMs that eventually go into
> > production on a different more permanent subnet); The script runs to
> > release the existing record in DNS, but fails because it can't find the
> > record (See log snippet below).
> >
> > Similarly, when the add function is run afterwards to add the new entry,
> > we're left with 2 separate records in DNS for the same hostname with
> > different IP addresses.
> > http://haste.thegamingcorner.net/rucuvanuxe.sql
> >
> > Record Add Log:
> > http://haste.thegamingcorner.net/qulivuwome.sql
> >
> > It's also worth noting that no matter what so far, when the script adds
> new
> > records, it does seem to add them correctly, but the reverse DNS portions
> > of the script aren't running, or something weird is happening on the
> > backend because there is no result code for those that are being returned
> > (hence the Update Failed: 0:0::) message. Got any suggestion for what I
> may
> > be missing on my end for that one?
> >
> > Thanks Again!
> > Ralph
> >
> > On Thu, Jan 28, 2021 at 6:30 AM Rowland penny <rpenny at samba.org> wrote:
> >
> >> On 28/01/2021 09:59, Rowland penny via samba wrote:
> >>> On 27/01/2021 20:43, ralph strebbing via samba wrote:
> >>>> So I'm upgrading our current NT4 domain to Samba AD with Bind9 DNS.
> Our
> >>>> current DHCP/DNS setup is on one server, separate from the Domain
> >>>> server.
> >>>> With Samba AD, we'll be using Samba's tools to manage the DNS, thus
> >>>> allowing use of things like the Windows Server Admin Tool suite (DNS,
> AD
> >>>> Users & Groups, etc.). So Bind9, isc-dhcp-server, and Samba is all
> >>>> going to
> >>>> be on the same machine for the new setup.
> >>>>
> >>> OK, you have identified a problem with the script 😅
> >>>
> >>> However, this error has nothing to do with the script:
> >>>
> >>> ERROR(runtime): uncaught exception - (9711,
> >>> 'WERR_DNS_ERROR_RECORD_ALREADY_EXISTS')
> >>>
> >>> This is being caused by a bug in the 'samba-tool dns' code and was
> >>> fixed in early 2020, so you need to upgrade Samba to 4.13.x
> >>>
> >>> I will have a look at the dhcp update script and get back to you.
> >>>
> >>> You also shouldn't need the 'rndc.key'
> >>>
> >>> Rowland
> >>
> >> OK Ralph, can you try the attached new version of the script 😁
> >>
> >> Rowland
> >>
> >>
> >>
> >>
> I have been using the script in its basic form for about 8 years now and
> it has never really failed for me, but then I don't allow dhcp to create
> a dns record in AD (the default reason for the script) and then manually
> change the computers ipaddress. Of course you are getting two IP's for
> each hostname, the script creates one and then you come along and add
> another one. If you are going to give your computers a fixed IP, do not
> use dhcp or rewrite my script to do what you require.
>
> You appear to using the script to do something it was never designed to,
> I will not alter it to do what want, it would have little use outside of
> yours and I would have no way of testing it.
>
> Rowland
>
>
>
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