Hello!

Thanks to @cezar91 we finally spot the issue, basically kamailio it's transforming t_code=0 (timeout) to 408 and the dispatcher module sees this last value.

Oct 28 14:16:32 net21-test /usr/sbin/kamailio[31911]: DEBUG: tm [t_reply.c:1311]: t_should_relay_response(): ->>>>>>>>> T_code=0, new_code=408
Oct 28 14:16:32 net21-test /usr/sbin/kamailio[31911]: DEBUG: tm [t_reply.c:2135]: local_reply(): DEBUG: local transaction completed 408/0 (totag retr: 0/1024)
Oct 28 14:16:32 net21-test /usr/sbin/kamailio[31911]: DEBUG: dispatcher [dispatch.c:2489]: ds_options_callback(): OPTIONS-Request was finished with code 408 (to sip:media21-test.internal:5060, group 3)

So if you set on "ds_ping_reply_codes" class=4 or code=408, kamailio will consider the backend up even if it doesn't actually receives that specific code.

Do you think it worth to update the docs and advice about this behaviour?
I just spot now the typo on the first email about the code sorry!

Thanks for your help
Alessio

On Wed, Oct 28, 2015 at 12:53 PM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,

can you want the network traffic and see if the OPTIONS requests are sent out?

Cheers,
Daniel


On 27/10/15 18:59, Alessio Casco wrote:
Hello Daniel!

Adding the sock_avp parameter, fixes the error on the log, but the behaviour is the same as before.


As you can see, with nothing listening on those two servers, the loadbalancing it's still disables.


SET: {
ID: 3
TARGETS: {
DEST: {
FLAGS: AP
PRIORITY: 0
}
DEST: {
FLAGS: AP
PRIORITY: 0
}
}
}

Thanks
Alessio


On Tue, Oct 27, 2015 at 5:33 PM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,

it looks like sock_avp parameter has to be set -- it is there before 4.3.0 release, as I could spot in 'git blame' for dispatcher.c:768.

Not sure is really needed for failover, I will check its usage when I get first chance.

http://kamailio.org/docs/modules/stable/modules/dispatcher.html#dispatcher.p.sock_avp

Cheers,
DAniel


On 26/10/15 17:00, Alessio Casco wrote:

Hello!

We noticed today an issue with the kamailio loadbalancing.

Basically kamailio is not considering if an host is up or not, backends are set always as "FLAGS: AP" even if the host is down.

I see this when the proxy starts :

ERROR: dispatcher [dispatcher.c:768]: ds_warn_fixup(): failover functions used, but required AVP parameters are NULL -- feature disabled

These the parameters I have set:

# ----- dispatcher params -----
modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
modparam("dispatcher", "dst_avp", "$avp(dsdst)")
modparam("dispatcher", "grp_avp", "$avp(dsgrp)")
modparam("dispatcher", "cnt_avp", "$avp(dscnt)")
modparam("dispatcher", "ds_ping_method", "OPTIONS")
modparam("dispatcher", "ds_ping_reply_codes", "class=2;class=3;code=404")
modparam("dispatcher", "ds_ping_from", "sip:proxy@sip.nexmo.com")
modparam("dispatcher", "ds_ping_interval", 20)
modparam("dispatcher", "ds_probing_threshold", 1)
modparam("dispatcher", "ds_probing_mode", 1)
modparam("dispatcher", "ds_hash_size", 10)
modparam("dispatcher", "ds_hash_expire", 3600)
modparam("dispatcher", "ds_hash_initexpire", 60)
modparam("dispatcher", "ds_hash_check_interval", 10)
modparam("dispatcher", "use_default", 0)
modparam("dispatcher", "attrs_pvname", "$avp(carrierattr)")
modparam("dispatcher", "setid_pvname", "$avp(carriergroup)")
modparam("dispatcher", "flags", 2)

I use 4.3.3, I think this issue started after upgrading from 4.3.1 but I can't say for sure.

Can someone please give us some advices on this?

Thanks
Alessio



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-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com
Kamailio Advanced Training, Nov 30-Dec 2, Berlin - http://asipto.com/kat

_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users




_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users


-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com
Kamailio Advanced Training, Nov 30-Dec 2, Berlin - http://asipto.com/kat

_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users