3 Sep
2018
3 Sep
'18
9:47 p.m.
David,
But in general, anything that involves complex weight-based logic across
a potentially very large number of sets is probably best suited to your
own implementation. The beauty of Kamailio is that this is easy to do.
You can put it in a DB stored procedure, an external Python program,
etc., and just return a relatively stupid, (almost) scalar route set to
Kamailio to iterate over.
-- Alex
On Mon, Sep 03, 2018 at 06:01:24AM -0400, Alex Balashov wrote:
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(a)gmail.com>
To: "Kamailio (SER) - Users Mailing List" <sr-users(a)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(a)evaristesys.com> wrote:
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
On Sun, Sep 02, 2018 at 11:58:37PM +0100, David
Villasmil wrote:
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users 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 $ulc PV:
https://kamailio.org/docs/modules/5.1.x/modules/registrar.html#registrar.f.…
and access the number of registrants for the AOR via profile=>count:
if(reg_fetch_contacts("location", "$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_-_rand…
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
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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