[SR-Users] Best practice for Kamailio "cluster" front for many TLS connections

[Patrick Wakano]

>
> But, my main question is about the DMQ on two Kamailio nodes and what
> happens in case one of them reloads. Are the dialogs and useloc synced
> automatically on reload? Is there a template config to read about this?
>

Hi, unless there are new development on version 5.5 that I am not aware, on
version 5.4, the dialogs do not sync automatically, so you need to save
them on DB and read from DB on startup (
https://kamailio.org/docs/modules/5.4.x/modules/dialog.html#dialog.p.db_skip_load).
The usrloc will sync without the need of a DB
https://kamailio.org/docs/modules/5.4.x/modules/dmq_usrloc.html#usrloc_dmq.p.sync


On Tue, 14 Sept 2021 at 22:44, Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> Hello,
>
> for the records, there is a minimal config example in the repo:
>
>   *
> https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/kamailio-minimal-anycast.cfg
>
> Maybe it is useful for a starting point, although I think it targets use
> of UDP.
>
> Cheers,
> Daniel
> On 13.09.21 08:46, Markus Monka wrote:
>
> Hi,
>
> we did some testing with ipvs but unfortunately where not been able to
> pursue it further.
> Today we use NAPTR/SRV Records for balancing to several TCP Loadbalancers.
>
> Best Regards
>  Markus
>
> On Mon, Sep 13, 2021 at 8:19 AM Henning Westerholt <hw at skalatan.de> wrote:
>
>> Hello,
>>
>>
>>
>> I would suggest having a look at the presentation from Armen, and
>> probably others from past KamailioWorld:
>>
>>
>>
>> https://www.youtube.com/c/KamailioWorld/search?query=anycast
>>
>>
>>
>> Cheers,
>>
>>
>>
>> Henning
>>
>>
>>
>> --
>>
>> Henning Westerholt – https://skalatan.de/blog/
>>
>> Kamailio services – https://gilawa.com
>>
>>
>>
>> *From:* sr-users <sr-users-bounces at lists.kamailio.org> *On Behalf Of *Angelo
>> Sipper
>> *Sent:* Sunday, September 12, 2021 11:44 AM
>> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
>> *Subject:* Re: [SR-Users] Best practice for Kamailio "cluster" front for
>> many TLS connections
>>
>>
>>
>> Sorry Fred,
>>
>>
>>
>> I believe, my question was wrongly asked.
>>
>> The correct question would be, Is there a guide for Kamailio and Anycast
>> that anyone could point me to read?
>>
>>
>>
>> But, my main question is about the DMQ on two Kamailio nodes and what
>> happens in case one of them reloads. Are the dialogs and useloc synced
>> automatically on reload? Is there a template config to read about this?
>>
>>
>>
>> Kind Regards,
>>
>> Angelo
>>
>>
>>
>> Στις Κυρ, 12 Σεπ 2021 στις 1:30 π.μ., ο/η Fred Posner <fred at palner.com>
>> έγραψε:
>>
>> To be clear here, this is the kamailio list and you’ve been referencing
>> opensips documentation.
>>
>> -- Fred
>>
>> (via mobile)
>>
>> Matrix: @fred:matrix.lod.com
>>
>>
>>
>>
>>
>> On Sep 11, 2021, at 5:46 PM, Angelo Sipper <sippro97 at gmail.com> wrote:
>>
>> 
>>
>> HI,
>>
>>
>>
>> Thanks for all the suggestions. I will look into glb-director and I will
>> come back in case I need more help.
>>
>> As I understand for same DC and two Kamailio's on active/standby with
>> keepalived is fine, at least for the load we are expecting now.
>>
>>
>>
>> Now one question on DMQ. Up today with the one only Kamailio we are using
>> the dialog db_mode 1 to have all dialogs in db, in order not to loose the
>> dialogs in case of reload. When we will have 2 Kamailio's with DMQ sync for
>> all dialogs, in case of one Kamailios reloads it will get all active
>> dialogs from the other Kamailio without the need to have the DB to handle
>> this and also delay the system. Is this the correct approach?
>>
>>
>>
>> Last, do you know any updated doc for Anycast  - Kamailio like the one
>> here for the older version 2.4 ?
>>
>> https://blog.opensips.org/2018/03/21/full-anycast-support-in-opensips-2-4/
>>
>>
>>
>> Kind Regards,
>>
>> Angelo
>>
>>
>>
>>
>>
>> Στις Σάβ, 11 Σεπ 2021 στις 11:03 μ.μ., ο/η Henning Westerholt <
>> hw at skalatan.de> έγραψε:
>>
>> Hello Angelo,
>>
>>
>>
>> it is possible to use Kamailio with an anycast setup, there are two talks
>> in the last years KamailioWorld conference about more details.
>>
>>
>>
>> But if we are only talking about several thousand clients, it’s not
>> needed for a start. Its certainly possible to operate this just with one
>> front-end Kamailio in an activate/passive setup, many people do this.
>>
>> E.g., look to this (rather old) performance tests, 1.000.000 contacts
>> with TLS on one server
>> http://sip-router.org/wiki/performance/v3.0-capacity
>>
>>
>>
>> Kamailio has no cluster module, you probably want to investigate the DMQ
>> module which offers clustering capabilities.
>>
>>
>>
>> Cheers,
>>
>>
>>
>> Henning
>>
>>
>>
>>
>>
>> --
>>
>> Henning Westerholt – https://skalatan.de/blog/
>>
>> Kamailio services – https://gilawa.com
>>
>>
>>
>> *From:* sr-users <sr-users-bounces at lists.kamailio.org> *On Behalf Of *Angelo
>> Sipper
>> *Sent:* Saturday, September 11, 2021 8:52 PM
>> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
>> *Subject:* Re: [SR-Users] Best practice for Kamailio "cluster" front for
>> many TLS connections
>>
>>
>>
>> Hi Fred,
>>
>>
>>
>> Thanks for the suggestions.
>>
>> I have been looking to all these presentations mostly from Rasvan but, he
>> mostly suggesting clusterer module combined with anycast which I cannot
>> locate on current version 5.x. Can you help me on what is the replacement
>> for this?
>>
>>
>>
>> Kind Regards,
>>
>> Angelo
>>
>>
>>
>> Στις Σάβ, 11 Σεπ 2021 στις 6:04 μ.μ., ο/η Fred Posner <fred at palner.com>
>> έγραψε:
>>
>> On 9/11/21 10:11 AM, Angelo Sipper wrote:
>> > Hello,
>> >
>> > We are thinking to use kamailio to fully support our current voip
>> service.
>> > [snip] What would be the best kamailio
>> > module and topology as solution to this requirement?
>> >
>> When designing a Kamailio deployment for several thousand plus clients,
>> there are many factors to consider... including network topology, future
>> growth plans, high availability, redundancy, etc.
>>
>> The quick answer top your question is: It depends.
>>
>> There are many discussions and presentations made over the years
>> including some posted to the kamailioworld youtube channel
>> (youtube,com/c/kamailioworld) as well as slides regarding large scale
>> deployments (such as 1&1).
>>
>> With best regards,
>>
>> Fred Posner | palner.com
>> Matrix: @fred:matrix.lod.com
>> o: +1 (212) 937-7844
>>
>>
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>
>
> --
> Dipl. Ing.
> Markus Monka - mmonka at sipgate.de
> Telefon: +49 (0)211-63 55 55-23
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>
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>
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> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>
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