[SR-Users] Kazoo like load balancing

[Jurijs Ivolga]

Hi Daniel,

Maybe you can share with me full config of your load-balancer? It will be
really nice if I can take a look on it. I'm very new in kamailio and for me
is very difficult to complile working config from short code snippets. :)

You mentioned that you have 2 load-balancer. Does this 2 load-balancers
share one domain-name?

I was thinking to use dispatcher module for load balancing. Do you use
dispatcher module in your config?

With kind regards,

Jurijs

2015-07-21 12:25 GMT+03:00 Daniel Tryba <d.tryba at pocos.nl>:

> On Tuesday 21 July 2015 11:13:15 Jurijs Ivolga wrote:
> > My set-up is working as it is with default settings, when 2 servers share
> > same DB in case if our subscribers do not use NAT.
> >
> > If subscribers are behind NAT, then in this case such set-up will not
> work,
> > as described here:
> >
> > http://kb.smartvox.co.uk/opensips/clustering-opensips-part-2/
> >
> > Please check diagram under "Far-end NAT traversal on multi-homed or
> > clustered servers".
>
> Adding the Path header on save() should solve this problem. The top most
> path
> is either the register server itself or the other one. If it is the
> otherone
> the INVITE should be send there. But like I said in
> http://lists.sip-router.org/pipermail/sr-users/2015-April/087872.html
> I hate NAT :(
>
> I didn't look further into my routing problems but solved it with
> loadbalancers.
>
> > I believe in my case solution will be only when I will have one more
> > Kamailio in front of my servers and it will dispatch all request to 2
> > servers, in this case I will eliminate this NAT issue.
>
> This solved my problem. Path points to loadbalancer and received in path to
> the external received address/port.
>
> UA1 registered to register1 via loadbalancer1
> UA2 registered to register2 via loadbalancer2
>
> if UA1 calls UA2, the call will go:
> UA1->LB1->random register->LB2 (based on path)->UA2 (based on path)
>
> These loadbalancers are very simple and essentially stateless.
>
> modparam("path", "use_received", 1)
>
> ...
>
> request_route {
>         route(NATDETECT);
>         route(WITHINDLG);
>
>         if (is_method("INVITE|SUBSCRIBE"))
>         {
>                 record_route();
>         }
>
>         if(!is_in_subnet($si, "myvoicesubnet"))
>         {
>                 add_path_received("vialoadalancers");
>                 $rd="mydomain";
>
>                 ds_select_dst(1, 0);
>                 t_on_failure("RTF_DISPATCH");
>         }
>         else
>         {
>                 add_path("fromregistrars");
>
>                 remove_hf("Route");
>
>                 loose_route();
>         }
>
>         route(RELAY);
> }
>
>
> --
>
> Telefoon: 088 0100 700
> Sales: sales at pocos.nl | Service: servicedesk at pocos.nl
> http://www.pocos.nl/ | Croy 9c, 5653 LC Eindhoven | Kamer van Koophandel
> 17097024
>
>
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