[SR-Users] Manage blacklisting on network errors

[Marat Gareev]

Hello again,

Related question: how to log destination ip/port of dispatcher set from
failure_route?

$si:$sp works as expected in onreply_route block:
onreply_route[MANAGE_REPLY] {
xlog("L_NOTICE", "$rr ($rs) [$cs] ($ci) $si:$sp - $ua\n");
if ( t_check_status("(503)|(408)|(480)") ) {
xlog("L_WARN", "Server will be blacklisted: $si:$sp ($rs)\n");
}
}

I tried to use this example
http://www.kamailio.org/wiki/cookbooks/5.2.x/pseudovariables#t_req_pv, but
get <null>:
failure_route[MANAGE_FAILURE] {

if ( !t_check_status("(503)|(408)|(480)") ) {
exit;
}

xlog("L_WARN", "Server will be blacklisted: $T_rpl($si):$T_rpl($sp)\n");
ds_mark_dst("IP"); # Set current server to probbing state
$si:$sp without T_rpl returns address and port of client.

Marat

вт, 14 сент. 2021 г. в 14:09, Henning Westerholt <hw at skalatan.de>:

> Hello,
>
>
>
> regarding your previous question:
>
> “How can such cases be managed and how can they be logged?”
>
>
>
> If you want to log the case that a destination goes offline, as mentioned
> have a look to the dispatcher event routes at the bottom of the docs.
>
>
>
> If you have another question, please elaborate. 😊
>
>
>
> Cheers,
>
>
>
> Henning
>
>
>
> --
>
> Henning Westerholt – https://skalatan.de/blog/
>
> Kamailio services – https://gilawa.com
>
>
>
> *From:* Marat Gareev <maratkin94 at gmail.com>
> *Sent:* Tuesday, September 14, 2021 1:02 PM
> *To:* Henning Westerholt <hw at skalatan.de>
> *Cc:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* Re: [SR-Users] Manage blacklisting on network errors
>
>
>
> Hello,
>
>
>
> Thank you for replying, but I don't understand how it will help me.
>
>
>
> I already use ds_mark_dst() and know how it works. Problem is that I can't
> control network errors with like this:
>
> if (network_error() || *timeout*()) {
>
>     xlog("L_WARN", "Server $si:$sp has network problems and will be
> blacklisted.\n");
>
>     ds_mark_dst("IP");
>
> }
>
>
>
> Marat
>
>
>
> вт, 14 сент. 2021 г. в 13:33, Henning Westerholt <hw at skalatan.de>:
>
> Hello,
>
>
>
> you probably want to check the dispatcher module docs out for this
> ds_mark_dst(..) function. You find also some RPC commands to e.g. inspect
> on shell. You can also try the event-routes documented there to log some
> info.
>
>
>
>
> https://kamailio.org/docs/modules/stable/modules/dispatcher.html#dispatcher.f.ds_mark_dst
>
>
>
> Cheers,
>
>
>
> Henning
>
>
>
> --
>
> Henning Westerholt – https://skalatan.de/blog/
>
> Kamailio services – https://gilawa.com
>
>
>
> *From:* sr-users <sr-users-bounces at lists.kamailio.org> *On Behalf Of *Marat
> Gareev
> *Sent:* Thursday, September 9, 2021 8:02 PM
> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* [SR-Users] Manage blacklisting on network errors
>
>
>
> Hello!
>
>
>
> I have a simple config for routing requests with failover and blacklisting
> on 408, 480 and 503 codes from servers.
>
>
>
> This is a part of config:
>
> *# Wrapper for relaying requests*
>
> *route[**RELAY**]* {
>
>
>
>   *# the base event routes*
>
>   t_on_branch("MANAGE_BRANCH");
>
>   t_on_reply("MANAGE_REPLY");
>
>   t_on_failure("MANAGE_FAILURE");
>
>
>
>   if (!t_relay()) {
>
>     sl_reply_error();
>
>   }
>
>   *exit*;
>
> }
>
>
>
> *# Manage incoming replies*
>
> *onreply_route[**MANAGE_REPLY**]* {
>
>   xlog("L_NOTICE", "$rr ($rs) [$cs] ($ci) $si:$sp - $ua\n");
>
>   if ( t_check_status("(503)|(408)|(480)") ) {
>
>     xlog("L_WARN", "Server will be blacklisted: $si:$sp ($rs)\n");
>
>   }
>
> }
>
>
>
> *# Manage failure routing cases*
>
> *failure_route[**MANAGE_FAILURE**]* {
>
>
>
>   if ( !t_check_status("(503)|(408)|(480)") ) {
>
>     *exit*;
>
>   }
>
>
>
>   ds_mark_dst("IP"); *# blacklist*
>
>
>
>   if (t_is_canceled()) *exit*;
>
>
>
>   if (!ds_next_domain()) {
>
>     send_reply("503", "Service Unavailable");
>
>     *exit*;
>
>   }
>
>
>
>   *route(**RELAY**)*;
>
> }
>
>
>
> If there is a timeout or network error on the server side, it is
> blacklisted. How can such cases be managed and how can they be logged?
> I didn't find this on the module page:
>
> https://www.kamailio.org/docs/modules/stable/modules/tm.html
>
>
>
>
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