[Serusers] Load balancing with Mediaproxy

[Greger V. Teigre]

I think you are confusing a couple of things here:
- dispatcher.so is a SER module for load balancing SIP messages to multiple 
other SIP servers
- mediaproxy.so is a SER module for load balancing RTP streams by 
manipulating the SDP payload in SIP messages
- proxydispatcher is the python daemon that mediaproxy.so communicates with 
(so you should use proxydispatcher.sock as mediaproxy_socket)
- proxydispatcher daemon will look up DNS and forward to mediaproxy python 
daemon (yes, same name, different thing)

Forget about dispatcher.so, set up SER and proxydispatcher daemon on same 
machine, set up one mediaproxy daemon on each RTP proxy server that 
proxydispatcher should load balance across (using DNS SRV).

Better?
g-)

smy at addm.com wrote:
> Hi all,
>
> As I've mentioned previously that I'm trying to deploy 1 SER and
> multiple mediaproxies.  Yet after reading the readme file from
> ag-projects (Thanks Greger, but I have read and tried this before)
> I'm still very confused in terms
> of configuration.
>
> I've tried adding a dispatcher list as follow....
>
> loadmodule "/usr/local/lib/ser/modules/mediaproxy.so"
> loadmodule "/usr/local/lib/ser/modules/dispatcher.so"
>
> modparam("mediaproxy","natping_interval", 30)
> modparam("dispatcher", "list_file", "/etc/ser/dispatcher.list")
> modparam("dispatcher", "force_dst", 1)
> modparam("mediaproxy","mediaproxy_socket", "/var/run/mediaproxy.sock")
> modparam("mediaproxy","sip_asymmetrics","/usr/local/etc/ser/sip-clients")
> modparam("mediaproxy","rtp_asymmetrics","/usr/local/etc/ser/rtp-clients")
>
> and the dispatcher list file as.....
> # $Id$
> # dispatcher destination sets
> #
>
> # proxies
> 2 sip:2xx.xx.xx.xx:5080
> 2 sip:6x.xx.xx.xx:5080
> 2 sip:8x.xx.xx.xx:5080
>
>
> SER couldn't even start properly and displays errors with the
> dispatcher module
> (or something to that affect).  Once I removed the dispatcher part of
> the config in the ser.cfg, everything works find again.  Any help in
> pointing me to
> the right direction is greatly appreciated!!
>
>
>
>
>
> Quoting "Greger V. Teigre" <greger at teigre.com>:
>
>> Hm, I think I'm the one who's confused. Have a misunderstood your
>> setup?  I thought you tried to loadbalance RTP across several
>> mediaproxy servers (where you only need one SER, but multiple
>> mediaproxies).  When you talk about two SERs, do you want to load
>> balance the messaging as well? In that case, there's a completely
>> different complexity (check out
>> carrier-grade/NAT/redundancy/scalability discussions on the list).
>> But also (luckily) quite easy to set up two mediaproxies for two SERs
>> (same setup on both), but you will then have four servers...
>> g-)
>>
>> peiyin wrote:
>>> Sorry to ask this question again,a bit confused. but do I need a
>>> virtual IP to represent both SER? If not then which domain/IP will
>>> my sip phone register to?
>>>
>>> Thanks,
>>> peiyin
>>>
>>> On Tue, 2005-06-21 at 21:28, Greger V. Teigre wrote:
>>>> What about reading the mediaproxy README? ;-)  And have a look at
>>>> the ini example:
>>>> http://mediaproxy.ag-projects.com/
>>>> g-)
>>>>
>>>> smy at addm.com wrote:
>>>>> Hi all,
>>>>>
>>>>> I'm stuck with the same problem....  regarding proxydispathcher. I 
>>>>> understand how to setup the DNS as mentioned by Greger, but how
>>>>> do I configure SER/proxydispatcher in terms of configuration
>>>>> file!?? I'm trying to deploy multple proxy servers in different
>>>>> geographical region, how should I go about doing so?  Any help is
>>>>> really appriciated.
>>>>> PS: I can't seem to find much info regarding proxydispatcher, but
>>>>> I got mediaproxy working thanks to the getting started doc at
>>>>> www.onsip.org.