[Asterisk-Users] Re: load balancing 20 asterisk servers

[Miguel Ruiz Velasco Sobrino]

You may want to consider a simpler aproach, why don't you balance the load via DNS?
If you put in a zone file various A records for the same machine, but with different
IP's, BIND will catch the trick and send a different IP (from the pool yo defined) each
time a DNS request arrives. That's a simple way of doing that, it will definively work
for termination, but you may have to think more who to cope with origiation (outgoing
calls), since different clients will be connected to different servers.


--- asterisk-users-request at lists.digium.com wrote:

Hi,

You may want to look into LVS (Linux Virtual Server). It allows load 
ballancing in a highly configurable way.
http://www.linuxvirtualserver.org/

We use it on our web and mail server to load ballance across multiple 
hosts. The way we have it configured
it will maintain a session for 15 minutes between a client and a 
specific server. So long as you have
qualify=yes in your configuration files, each client will continue to 
talk to the one server until they are turned off/
deactivated for at least 15 minutes (or whatever time period you 
configure into it). I've not tested LVS with
Asterisk, but it may be the right direction for you to take.

Cheers,
-Shaun

Matthew Boehm wrote:

>I've read several other emails and pages on the wiki but none give any
>deffinate answers. if you have 20 asterisk servers each with 4 pri's, all
>running RealTime Extensions and RealTime SIPBuddies from the same MySQL
>server, what prevents you from putting all 20 servers behind a single load
>balancer? That way all of your UA's can use the same IP to register to; vs
>maintaining which customer is assigned to which machine.
>
>perhaps its just that i am not that familiar with load balancers. i was
>under the impression that a load balancer could/would send each recieved
>packet to a different server.
>this doesn't matter in the case of register requests since all asterisk
>boxes share same SIP registry database.
>
>but what about invite requests and the rtp stream? you would have a majorly
>broken conversation if each packet in the rtp stream went to a different
>asterisk box.
>
>or are load balancers SIP aware? or is there some sort of session control
>that the balancer is aware of and will send all packets in a "sip session"
>to the same asterisk box?
>
>and then what about meet me conferences? if 10 UA's all dial a conference
>DID number and all 10 get balanced to 10 different servers then they are all
>sitting in seperate rooms right?
>
>hints, opinions, facts...all welcome and appreciated.
>
>-Matthew
>
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