kamailio/misc/examples/exec/exec_dist.cfg

#
# $Id$
#
# Example for distributing load accross multiple devices
#
fork=no
log_stderror=yes
listen=192.168.2.16
# ----------- global configuration parameters ------------------------

loadmodule "modules/exec/exec.so"
loadmodule "modules/sl/sl.so"
loadmodule "modules/tm/tm.so"

# ----------------- setting module-specific parameters ---------------

route{
	# uri for my domain ?
	if (!(uri==myself)) {
		sl_send_reply("500", "example serves only my domain");
		break;
	};
	if (method=="REGISTER") {
		sl_send_reply("200", "silly example -- pretend registrar");
		break;
	};
   	exec_dset('
# calculate a characteristic value for this call
CHAR=`echo $SIP_HF_CALLID | sum  | awk " { print \\\$1 } "`
# normalize the value
NC=`expr $CHAR % 100`

# distribute now

# gateway 192.168.2.35 @ 10 %
if [ "$NC" -lt 10 ] ; then
	printf "sip:00$SIP_USER@192.168.2.35"
	exit
fi

# anything else at 90 %
printf "sip:11$SIP_USER@192.168.2.34"  
exit

# SER adds command-line parameters -- trash them here
echo > dev/null
');

	t_relay();
}