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#!/bin/sh
# Copyright (C) 2008, 2009 Nicira Networks, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
SECCHAN_PID=/var/run/secchan.pid
SECCHAN_SOCK=/var/run/secchan.mgmt
LOG_FILE=/var/log/openflow/monitor
INTERVAL=1
FAIL_THRESH=3
usage() {
echo usage: $0 options
echo
echo "OPTIONS:"
echo " -h Show this message"
echo " -p PID file for secchan (default: $SECCHAN_PID)"
echo " -s Unix socket for secchan (default: $SECCHAN_SOCK)"
echo " -l File to log messages (default: $LOG_FILE)"
echo " -i Interval to send probes in seconds (default: $INTERVAL)"
echo " -c Number of failed probes before reboot (default: $FAIL_THRESH)"
}
log() {
echo `date +"%b %d %X"`:$1
echo `date +"%b %d %X"`:$1 >> $LOG_FILE
}
while getopts "hp:s:l:i:c:" OPTION; do
case $OPTION in
h)
usage
exit 1
;;
p)
SECCHAN_PID=$OPTARG
;;
s)
SECCHAN_SOCK=$OPTARG
;;
l)
LOG_FILE=$OPTARG
;;
i)
INTERVAL=$OPTARG
;;
c)
FAIL_THRESH=$OPTARG
;;
*)
echo "Unknown option: ${OPTION}"
esac
done
if [ ! -f $SECCHAN_PID ]; then
log "No secchan pid file: ${SECCHAN_PID}"
echo "No secchan pid file: ${SECCHAN_PID}"
fi
if [ ! -S $SECCHAN_SOCK ]; then
log "No secchan sock file: ${SECCHAN_SOCK}"
echo "No secchan sock file: ${SECCHAN_SOCK}"
fi
if [ ! -d `dirname $LOG_FILE` ]; then
mkdir -p `dirname $LOG_FILE`
fi
let DP_DOWN=0
let SECCHAN_DOWN=0
log "===== Starting Monitor ===="
while `/bin/true`; do
# Only check for liveness if the secchan's PID file exists. The PID
# file is removed when secchan is brought down gracefully.
if [ -f $SECCHAN_PID ]; then
pid=`cat $SECCHAN_PID`
if [ -d /proc/$pid ]; then
# Check if the secchan and datapath still can communicate
if [ -S $SECCHAN_SOCK ]; then
ovs-ofctl probe -t 2 unix:$SECCHAN_SOCK
if [ $? -ne 0 ]; then
log "datapath probe failed"
let DP_DOWN++
else
let DP_DOWN=0
fi
fi
let SECCHAN_DOWN=0
else
log "secchan probe failed"
let SECCHAN_DOWN++
fi
fi
if [ $SECCHAN_DOWN -ge $FAIL_THRESH ]; then
log "Failed to probe secchan after ${SECCHAN_DOWN} tries...rebooting!"
reboot
fi
if [ $DP_DOWN -ge $FAIL_THRESH ]; then
log "Failed to probe datapath after ${DP_DOWN} tries...rebooting!"
reboot
fi
sleep $INTERVAL
done
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