Monit is an open source supervision tool. It can monitor daemons, system resources, remote hosts or programs. It is recommended to use monit to monitor your applications. Please see online documentation.

The command monit status returns the status of all supervised services. Services can be started/stopped with monit using the commands monit start <name> and monit stop <name>.

The monit configuration is made in the directory /etc/monit.d. It is a directory in which you have to add small scripts to describe what you want to do accordingly to monit specification.

Watchdog is handled by monit daemon.

Simple Network Management Protocol (SNMP) is a protocol used for monitoring network equipments. The data SNMP management is organized in a management information base (MIB). SNMP agent on Kerlink gateways is based on net-snmp (Net-SNMP). It is included by default with the firmware, however, since this is a generic agent, a few modifications are required to use it.

Configuration file must be in /etc/snmp/. A default configuration file is present in this directory.

To execute snmp agent, just type:

 snmpd

To automatically execute snmpd at boot time, a script named snmpd.init needs to be created in a new folder /user/snmp/bin/.

• Copy the following script under /user/snmp/bin/snmpd.init.

snmpd.init

#! /bin/sh -e
### BEGIN INIT INFO
# Provides:           snmpd
# Required-Start:     $network $local_fs
# Required-Stop:      $network $local_fs
# Default-Start:      2 3 4 5
# Default-Stop:       0 6
# Short-Description:  SNMP agents
# Description:        NET SNMP (Simple Network Management Protocol) Agents
### END INIT INFO
#
set -e
 
export PATH=/sbin:/usr/sbin:/bin:/usr/bin
 
test -x /usr/sbin/snmpd || exit 0
 
# Defaults
export MIBDIRS=/usr/share/snmp/mibs
SNMPDRUN=yes
SNMPDOPTS='-Lsd -p /var/run/snmpd.pid'
TRAPDRUN=no
TRAPDOPTS='-Lsd -p /var/run/snmptrapd.pid'
 
# Reads config file (will override defaults above)
[ -r /etc/default/snmpd ] && . /etc/default/snmpd
 
ssd_oknodo="-o"
 
# Cd to / before starting any daemons.
cd /
 
# Create compatibility link to old AgentX socket location
if [ "$SNMPDCOMPAT" = "yes" ]; then
  ln -sf /var/agentx/master /var/run/agentx
fi
 
case "$1" in
  start)
    printf "Starting network management services:"
    if [ "$SNMPDRUN" = "yes" -a -f /etc/snmp/snmpd.conf ]; then
      start-stop-daemon -S -x /usr/sbin/snmpd -- $SNMPDOPTS
      printf " snmpd"
    fi
    echo "."
    ;;
  stop)
    printf "Stopping network management services:"
    start-stop-daemon -q -K $ssd_oknodo -x /usr/sbin/snmpd
    printf " snmpd"
    echo "."
    ;;
  restart)
    printf "Restarting network management services:"
    start-stop-daemon -q -K $ssd_oknodo -x /usr/sbin/snmpd
    # Allow the daemons time to exit completely.
    sleep 2
    if [ "$SNMPDRUN" = "yes" -a -f /etc/snmp/snmpd.conf ]; then
      start-stop-daemon -q -S -x /usr/sbin/snmpd -- $SNMPDOPTS
      printf " snmpd"
    fi
    echo "."
    ;;
  reload|force-reload)
    printf "Reloading network management services:"
    if [ "$SNMPDRUN" = "yes" -a -f /etc/snmp/snmpd.conf ]; then
      start-stop-daemon -q -K -s 1 -p /var/run/snmpd.pid -x /usr/sbin/snmpd
      printf " snmpd"
    fi
    echo "."
    ;;
  *)
    echo "Usage: /etc/rcU.d/snmpd {start|stop|restart|reload|force-reload}"
    exit 1
esac
 
exit 0

• Apply executable right to the script:

chmod 700 /user/snmp/bin/snmpd.init

• Create a symbolic link in rcU.d to the script so so it is executed at boot time.

ln -s /user/snmp/bin/snmpd.init /user/rootfs_rw/etc/rcU.d/S59snmpd

• Create a symbolic link in rcU.d to the script so so it is executed when the system halts.

ln -s /user/snmp/bin/snmpd.init /user/rootfs_rw/etc/rcK.d/K59snmpd

• Reboot the Wirnet™ iBTS (reboot command) or type the below command to start snmpd:

/etc/rcU.d/S59snmpd start

The following MIBs are supported:

• mib2 (RFC1213)

mibII/vacm_conf
mibII/tcpTable
mibII/udpTable
mibII/system

• if-mib

if-mib/ifTable
if-mib/ifTable/ifTable
if-mib/ifTable/ifTable_interface

For more information, see Net-SNMP.