[SR-Users] [sr-dev] new module db_kazoo

Daniel-Constantin Mierla miconda at gmail.com
Tue Sep 9 13:45:08 CEST 2014


thanks for this contribution!

Do you have a link to the module source code or can you send it 
attached? We need to review a bit and check if everything is in place 
(e.g., license, documentation).

For a better clarification, do the json payloads flowing via AMQP have a 
structure specific for kazoo? I mean the object structure, how are the 
fields name set, from the name of the columns? Is there a wrapper to 
specify the command (e.g., insert, delete, select)? Or maybe you can 
provide an example of such object...

Kazoo is an open source application, therefore the new module has no 
barrier in getting inside kamailio repository. My questions were related 
more to see if worth considering a new name.

To get it in our git repository, we expect that you or someone else from 
2600hz is willing to maintain it for at least one year. You will get 
write access over ssh to git repository to be able to push the new 
module and commit to it in the future. I will write a separate email 
directly to you with the required details for access.


On 09/09/14 12:22, Luis Azedo wrote:
> Hello Awesome Kamailio Community,
> We are writing on behalf of 2600hz, where we have been using Kamailio 
> for some time now and are very pleased with our results! So, seems 
> time to commit something back, dontchya think?
> We would like to present to you a new module, to hopefully be included 
> in master.   We call it db_kazoo (although a new name is fine too).
> db_kazoo is a general purpose AMQP connector (connects to our 
> rabbitmq-server). It exposes publish/consume capabilities into 
> Kamailio. Why is this amazing, you ask? Well even if you didn’t ask, 
> we will explain…
> From a high-level, the purpose of the module might be for things like:
> - Integrate to an AMQP application to make real-time routing decisions 
> (instead of using, say, a SQL database)
> - Provide a real-time integration into your program, instead of your 
> database, so you can overlay additional logic in your preferred 
> language while also utilizing a message bus
> - Utilize messaging to have a distributed messaging layer, such that 
> machines processing requests/responses/events can go up/down or share 
> the workload and your Kamailio node will still be happy
> With this module, someone can:
> 1 - publish json payloads to rabbitmq
> 2 - publish json payloads to rabbitmq and wait for correlated response 
> message
> 3 - subscribe to an exchange with a routing key
> The module works with a main forked process that does the 
> communication with rabbitmq for issuing publishes, waiting for replies 
> and consuming messages. When it consumes a message it defers the 
> process to a worker process so that it doesn't block this main process.
> The worker process issues an event-route where we can act on the 
> received payload. The name of the event-route is composed by values 
> extracted from the payload.
> Consumed messages have the option of being acknowledge in two ways:
> 1 - immediately when received
> 2 - after processing by the worker
> One unique feature of our implementation revolves around failover of 
> the message bus itself. In our design, the module supports multiple 
> RabbitMQ servers and will fallback from one to the next in a list of 
> RabbitMQ servers if the connection fails to the current connected 
> server. When using acknowledge in db_kazoo with clustering in 
> RabbitMQ, we have simulated and experienced full reconnects while in 
> the middle of processing pending messages. In this way, when we get 
> disconnected from one server we proved that, even at high speeds, we 
> are able to connect to the next in the list and continue interacting 
> with our application.
> We have run a variety of sipp load tests on this module and believe it 
> is ready for prime time. We monitored memory, response accuracy and 
> overall stability and it seemed OK. But we would, of course, love for 
> others to help us find what we have missed, or contribute more 
> features, or overall just use the work we slaved over for so many 
> hours. Or just make comments and suggestions!
> If nothing else, we hope we’ve provided something useful to the 
> Kamailio community, as you all have provided useful items to us.
> Thanks to everyone for all the work on Kamailio and related products.
> Look forward to hearing from you all.
> This is our first formal / large contribution to Kamailio so if we’ve 
> done something wrong process, code or otherwise please let us know!
> _______________________________________________
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> sr-dev at lists.sip-router.org
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Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Next Kamailio Advanced Trainings 2014 - http://www.asipto.com
Sep 22-25, Berlin, Germany

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