[Freeswitch-users] Load balancing solution using pure FreeSWITCH

[Vitalii Colosov]

Basically this solution gives me exactly what I need at the moment.

If there is a still special reason to use OpenSIPS, maybe we should expect
opinion of some better FS experts then me :-)

vIT

2010/3/16 Alfredo Quiroga-Villamil <lawwton at gmail.com>

> Vit:
>
> Nice email, very informative; curious to find out the reasons why you
> decided to go with FS instead of OpenSip. We soon have to make a
> similar decision and would like to find out the rationale behind it.
>
> Thanks,
>
> Alfredo
>
> On Tue, Mar 16, 2010 at 8:04 AM, Vitalii Colosov <vetali100 at gmail.com>
> wrote:
> > Hi dear FS community,
> > After a brief analysis of 2 solutions using OpenSIPS
> > and Kamailio (
> http://www.opensips.org/html/docs/modules/devel/load_balancer.html#id226109
> > ) and (http://wiki.freeswitch.org/wiki/SBC_Setup) I decided to implement
> my
> > own solution using ONLY FreeSWITCH and ONLY 1 table of any database
> server
> > (we use MySQL).
> > It works on few of our servers right now without any issues.
> > Feel free to reuse / improve it or provide your comments if you see
> > something wrong with it.
> >
> > We have one routing server (RS) and several Media Servers (MS).
> > FreeSWITCH is installed on each server in default configuration.
> > --> MS_1
> > RS  --> MS_2
> > --> MS_N
> >
> > (Failover can be implemented by adding one more routing server, but this
> is
> > out of scope of current description).
> > Routing server routes calls to media servers based on logic that you can
> > easily define.
> > (Generally speaking, Routing server can route part of the calls onto
> itself,
> > but to simplify let's say that it will route only to Media Servers).
> >
> > Routing server is used to register subscribers (it will have directory
> files
> > ./freeswitch/conf/directory/default/10001whatever.xml-99999whatever.xml).
> > Media servers do NOT contain files with users (security issue? probably
> > should be managed on dialplan stage of media servers by comparing ip
> > addresses of requests).
> >
> > The whole routing can be presented by the following chain:
> > Call arrives into Default context-->RS default dialplan-->Lua
> script-->PHP
> > script to get destination MEDIA SERVER IP-->back to Lua script-->Bridge
> > "sofia/external/" to determined MS IP address-->[Bridge to fail over
> media
> > server, optionally]-->End
> > Let's say we need to route all international calls based on less loaded
> > server (other logic can be easily implemented in PHP script as well).
> > 1. RS Dialplan: default.xml
> > <include>
> >         <extension name="route">
> >                 <condition field="destination_number"
> > expression="^(00)(\d+)">
> >                         <action application="lua" data="route.lua $2"/>
> >                 </condition>
> >         </extension>
> > </include>
> >
> > 2. RS Lua script: route.lua
> > called_number = argv[1]; //without "00"
> > api = freeswitch.API();
> > server_ip_address = api:executeString("curl
> > http://localhost/get_server_ip.php);
> > forwarding_session_string =
> > "sofia/external/"..called_number.."@"..server_ip_address;
> > session:setVariable("bypass_media", "true"); //described below!!!
> > session:execute("bridge",forwarding_session_string);
> > 3. PHP script: get_server_ip.php
> > <<<  ANY PHP CODE THAT WILL QUERY COMMON DATABASE AND WILL DETERMINE LESS
> > LOADED AT THE MOMENT SERVER>>>
> > die($less_loaded_server_ip);
> >
> > All Media Servers should provide information about their current load
> into
> > one common database (dedicated server or routing server can be used for
> > database).
> > If you use scripts you can update this table on starting a call and after
> > call finished.
> > Or you can create a job that will query FreeSWITCH and will update the
> > database every, say, 10 seconds.
> >
> > Basically that's all (really!)
> > I beleive it can be used for most general purpose scenarios without need
> of
> > third-party tools.
> > P.S.
> > The only problem we had from the beginning was that RTP media traffic was
> > passing thru both servers: RS and Media Server.
> > But after we added the following command to the routing script, RTP media
> > traffic started to pass only thru Media server, making RS almost free.
> > session:setVariable("bypass_media", "true");
> >
> >
> > Best regards,
> > vIT
> >
> > _______________________________________________
> > FreeSWITCH-users mailing list
> > FreeSWITCH-users at lists.freeswitch.org
> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> > http://www.freeswitch.org
> >
> >
>
> _______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20100316/4359b1de/attachment-0002.html