You can trigger a reload via the jsonrpcs module. If it's available as an RPC function externally, you can call it internally.
-- Sent from mobile. Apologies for brevity and errors.
-----Original Message----- From: David Villasmil david.villasmil.work@gmail.com To: "Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org Sent: Mon, 03 Sep 2018 5:59 AM Subject: Re: [SR-Users] load-balance to registered trunks?
Thanks for replying!
Interesting approach! Though i don't think that will work for me. I've been looking into my requirements, and I'd need to do weight-based distribution instead of load-balance, also what i need is to add destinations to the dispatcher lists dynamically. I was thinking of adding them dynamically when they register, but the module doesn't have a function to reload the list via the config script, or a db_mode as on other modules. This one is going to be tricky...
Any ideas?
David
On Mon, Sep 3, 2018, 00:26 Alex Balashov abalashov@evaristesys.com wrote:
On Sun, Sep 02, 2018 at 11:58:37PM +0100, David Villasmil wrote:
I've got this scenario where some gateways will register on my kamailio and i need to send them calls on a load-balance fashion. is this possible?
Sure, anything is possible in Kamailio if you write the logic for it. :-)
I like stateless load-balancing methods where possible - the fewer moving parts, the better.
You can do a lookup() and then t_load_contacts(),
https://kamailio.org/docs/modules/5.1.x/modules/tm.html#tm.f.t_load_contacts
and examine the size of the `contacts_avp`, e.g. by iterating through it with a while loop as you would any XAVP:
$var(num_contacts) = 0;
while(defined $xavp(whatever[$var(num_contacts)])) $var(num_contacts) = $var(num_contacts) + 1;
or you can reg_fetch_contacts() and do the same with the $ulc PV:
https://kamailio.org/docs/modules/5.1.x/modules/registrar.html#registrar.f.r...
and access the number of registrants for the AOR via profile=>count:
if(reg_fetch_contacts("location", "$ru", "blah")) { # Concurrent contact count is available as $ulc(blah=>count);
...}
I prefer the latter.
Either way, once you have a count, judicious use of cfgutils:$RANDOM
https://www.kamailio.org/wiki/cookbooks/5.1.x/pseudovariables#random_-_rando...
will have you on your way to sending the call to a random contact of the bunch. For sufficiently large samples, random distribution is substantially similar to round-robin load balancing.
If you need failover with that load-balancing, you'll have to buffer these contacts into an XAVP and serially fork through them with a failure_route. Either way, it's all quite doable.
If what you're asking is whether there is a built-in facility to effect load balancing across registrants, I'm not aware of one, though it could be my ignorance.
-- Alex
-- Alex Balashov | Principal | Evariste Systems LLC
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