[Freeipa-users] Setting up replication, documentation unclear regarding DNS entries

[Dmitri Pal]

On 04/09/2012 03:02 PM, KodaK wrote:
> On Mon, Apr 9, 2012 at 1:53 PM, Dmitri Pal <dpal at redhat.com> wrote:
>> On 04/09/2012 02:50 PM, KodaK wrote:
>>> On Mon, Apr 9, 2012 at 1:46 PM, Dmitri Pal <dpal at redhat.com> wrote:
>>>> On 04/09/2012 02:41 PM, KodaK wrote:
>>>>> On Mon, Apr 9, 2012 at 1:34 PM, Dmitri Pal <dpal at redhat.com> wrote:
>>>>>> On 04/09/2012 02:07 PM, KodaK wrote:
>>>>>>> I have two IPA servers.  The primary/master is SLPIDML01 and the
>>>>>>> replica is SLPIDML01.  I have followed the instructions for creating a
>>>>>>> replica and the install on SLPIDML02 completed successfully.  However,
>>>>>>> the instructions tell me to add some entries to the DNS zone file, and
>>>>>>> I'm stumped.
>>>>>>>
>>>>>>> The FreeIPA documentation has this to say about setting up DNS for replicas:
>>>>>>>
>>>>>>> Updating DNS for IPA Replicas
>>>>>>>
>>>>>>> After you have configured a new IPA replica, you should update your
>>>>>>> DNS entries so that IPA clients can discover the new server. For
>>>>>>> example, for an IPA replica with a server name of $HOST, you should
>>>>>>> add the following entries to your zone file:
>>>>>>>
>>>>>>> _ldap._tcp             IN SRV 0 100 389       $HOST
>>>>>>> _kerberos._tcp         IN SRV 0 100 88 $HOST
>>>>>>> _kerberos._udp         IN SRV 0 100 88 $HOST
>>>>>>> _kerberos-master._tcp  IN SRV 0 100 88 $HOST
>>>>>>> _kerberos-master._udp  IN SRV 0 100 88 $HOST
>>>>>>> _kpasswd._tcp          IN SRV 0 100 464 $HOST
>>>>>>> _kpasswd._udp          IN SRV 0 100 464 $HOST
>>>>>>> _ntp._udp              IN SRV 0 100 123 $HOST
>>>>>>>
>>>>>>> I know very little about configuring DNS.  Where exactly should this
>>>>>>> go?  It says to add it to your zone file, all I see is a
>>>>>>> named.rfc1912.zones file, and it appears to be rather structured.  Do
>>>>>>> I just dump these at the end?  That doesn't seem to make any sense.  I
>>>>>>> see a reference to /var/named/example.com.zone.db, but I don't have
>>>>>>> one for my domain, and I still don't know what the format of the file
>>>>>>> should be.  Do I need to make entries for both hosts (and any others I
>>>>>>> add in the future?)
>>>>>>>
>>>>>> What DNS server do you use?
>>>>>> Did you consider using DNS server that comes with IPA?
>>>>>>
>>>>> I am using the DNS server that comes with IPA.
>>>> Then the replicas are added automatically to the DNS servers managed by
>>>> IPA. I think the documentation refers to the case when you are not using
>>>> the DNS server provided by IPA. Then you need to add mentioned entries.
>>>> If this is not clear please open a ticket and provide a pointer to the
>>>> section that caused the confusion.
>>> I've opened a ticket, thanks.
>>>
>>> When I manually turn off the network interfaces on the master, the
>>> replica does not take over.
>> How you test it?
>> The client will fail over if it can't access the server that you turned
>> off.
>>
>>
>>> For the record, the documentation makes no discernible differentiation
>>> between IPA's DNS and external DNS:
>>>
>>> "Once the installation process completes, update the DNS entries so
>>> that IPA clients can discover the new server. For example, for an IPA
>>> replica with a hostname of ipareplica.example.com:"
> Sorry, I thought I did reply to the list.
>
> I must be misunderstanding something.
>
> When I ipa-replica-install it does not automatically set up a DNS
> replica, correct?
>
> When I run ipa dnsrecord-add domain.com @ --ns-rec
> slpidml02.unix.magellanhealth.com. I'm only telling IPA that this new
> host is now a nameserver, correct?
>
> So at what point do DNS entries replicate?  Or do I set that up outside of IPA?
>
> Thanks again,
>
> --Jason

Rob,

When we add replicas, do we create SRV records for them automatically? I
thought so but may be I am wrong? Can you please chime in?

-- 
Thank you,
Dmitri Pal

Sr. Engineering Manager IPA project,
Red Hat Inc.


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