[OpenSIPS-Users] load balancing in opensips
Ghaith ALKAYYEM
ghaith.alkayyem at telecom-bretagne.eu
Thu Aug 6 12:13:42 CEST 2009
Hi,
I'm trying to connect OpenSIP to 3 WAN links, and I want to distribute
the traffic between those links according to the dialing number. So, I
tried some modules like lcr and load_balance but the test didn't succeed
because those modules are forwarding the traffic to another SIP gateway
or media gateway.
I tried to change the outbound interface via force_send_socket and
setting mhomed=1 and OpenSIPS still connect through the main interface.
The IPs of the system are:
172.23.1.20
172.23.1.19
172.23.1.18
and the originating IP is always 172.23.1.20
please find a part of my configuration file:
# main request routing logic
mhomed=1
route{
if($ct=~"2000.*")
{
#load_balance("2","conf");
force_send_socket(172.23.1.19:5060);
};
if($ct=~"3000.*")
{
#load_balance("1","conf");
force_send_socket(172.23.1.18:5060);
};
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
exit;
}
if (has_totag()) {
# sequential request withing a dialog should
# take the path determined by record-routing
if (loose_route()) {
if (is_method("BYE")) {
setflag(1); # do accounting ...
setflag(3); # ... even if the transaction
fails
} else if (is_method("INVITE")) {
# even if in most of the cases is
useless, do RR for
# re-INVITEs alos, as some buggy clients
do change route set
# during the dialog.
record_route();
}
# route it out to whatever destination was set by
loose_route()
# in $du (destination URI).
route(1);
} else {
/* uncomment the following lines if you want to
enable presence */
##if (is_method("SUBSCRIBE") && $rd ==
"your.server.ip.address") {
## # in-dialog subscribe requests
## route(2);
## exit;
##}
if ( is_method("ACK") ) {
if ( t_check_trans() ) {
# non loose-route, but stateful
ACK; must be an ACK after
# a 487 or e.g. 404 from upstream
server
t_relay();
exit;
} else {
# ACK without matching
transaction ->
# ignore and discard
exit;
}
}
sl_send_reply("404","Not here");
}
exit;
}
#initial requests
# CANCEL processing
if (is_method("CANCEL"))
{
if (t_check_trans())
t_relay();
exit;
}
t_check_trans();
# authenticate if from local subscriber (uncomment to enable
auth)
# authenticate all initial non-REGISTER request that pretend to
be
# preloaded route checking
if (loose_route()) {
xlog("L_ERR",
"Attempt to route with preloaded Route's
[$fu/$tu/$ru/$ci]");
if (!is_method("ACK"))
sl_send_reply("403","Preload Route denied");
exit;
}
# record routing
if (!is_method("REGISTER|MESSAGE"))
record_route();
# account only INVITEs
if (is_method("INVITE")) {
setflag(1); # do accounting
}
if (!uri==myself)
## replace with following line if multi-domain support is used
##if (!is_uri_host_local())
{
append_hf("P-hint: outbound\r\n");
# if you have some interdomain connections via TLS
##if($rd=="tls_domain1.net") {
## t_relay("tls:domain1.net");
## exit;
##} else if($rd=="tls_domain2.net") {
## t_relay("tls:domain2.net");
## exit;
##}
route(1);
}
# requests for my domain
## uncomment this if you want to enable presence server
## and comment the next 'if' block
## NOTE: uncomment also the definition of route[2] from below
##if( is_method("PUBLISH|SUBSCRIBE"))
## route(2);
if (is_method("PUBLISH"))
{
sl_send_reply("503", "Service Unavailable");
exit;
}
if (is_method("REGISTER"))
{
# authenticate the REGISTER requests (uncomment to enable
auth)
##if (!www_authorize("", "subscriber"))
##{
## www_challenge("", "0");
## exit;
##}
##
##if (!check_to())
##{
## sl_send_reply("403","Forbidden auth ID");
## exit;
##}
if (!save("location"))
sl_reply_error();
exit;
}
if ($rU==NULL) {
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}
# apply DB based aliases (uncomment to enable)
##alias_db_lookup("dbaliases");
if (!lookup("location")) {
switch ($retcode) {
case -1:
case -3:
t_newtran();
t_reply("404", "Not Found");
exit;
case -2:
sl_send_reply("405", "Method Not
Allowed");
exit;
}
}
# when routing via usrloc, log the missed calls also
setflag(2);
route(1);
}
Many thnaks.
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