[SR-Users] Kamailio - DMQ dns srv Question

José Seabra joseseabra4 at gmail.com
Thu Sep 22 15:59:10 CEST 2016


Thank you Charles,
Cheers
José Seabra

2016-09-22 14:19 GMT+01:00 Charles Chance <charles.chance at sipcentric.com>:

> Hi,
>
> On 22 September 2016 at 14:08, José Seabra <joseseabra4 at gmail.com> wrote:
>
>> Hi charles,
>> Inline
>> Thanks
>>
>> 2016-09-22 13:51 GMT+01:00 Charles Chance <charles.chance at sipcentric.com>
>> :
>>
>>> Hi José,
>>>
>>> In your config, you need to tell DMQ about a minimum of one other node.
>>> This can be in the form of an IP or FQDN - however, where the FQDN resolves
>>> to a single IP, it does not make sense to perform anything other than an A
>>> lookup, so you should set the parameter to 0 in this case.
>>>
>>> The number of nodes in your cluster is irrelevant - once started, DMQ
>>> will contact the one you have told it about and learn about the others
>>> automatically.
>>>
>>> Optionally, you can tell DMQ about multiple nodes upfront (to account
>>> for instances where the first one may be down or unreachable), by giving it
>>> an FQDN which resolves to multiple IP addresses - in which case you'll need
>>> to set the multi_notify parameter to 1.
>>>
>>
>>
>>> >> This is the reason that I'm using multi_notify, the doubt here was
>>> why it is querying dns using SRV without service specification.
>>>
>>
>>
>
> Understood, thanks - I misread the following...
>
>
>>>>>> Another doubt is when we use a FQDN that only resolves as A record,
>>>>>> would be better DMQ send only a A query or is there any reason for always
>>>>>> try SRV?
>>>>>>
>>>>>>
> ...to mean a scenario in which the FQDN resolves to a single IP only. My
> mistake!
>
> I'll take a look into adding service specification later today.
>
> Cheers,
> Charles
>
>
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> office: Faraday Wharf, Innovation Birmingham Campus, Holt Street,
> Birmingham Science Park, Birmingham B7 4BB.
>
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>


-- 
Cumprimentos
José Seabra
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