kvm-clock-hardsync.sh

kvm-clock-hardsync.sh

#!/bin/bash
# /usr/local/sbin/kvm-clock-hardsync.sh

# cron:
# * * * * * /usr/bin/cronic /usr/local/sbin/kvm-clock-hardsync.sh
#

[ "$DEBUG" = "YES" ] \
	&& set -x

# required for running in cron
PATH="/sbin:/usr/sbin:$PATH"
export PATH

####

ntpserver=$( grep ^server /etc/ntp.conf | awk '{print $2}' )
if [ -n "$ntpserver" ]
then
	ntpserverdiff=$(/usr/lib64/nagios/plugins/check_ntp -H "$ntpserver" -v | grep 'overall average offset:' | cut -d : -f 2 | tr -d ' ' | cut -d . -f 1)
fi
hwclockdiff="$(( $(date +%s) - $(date +%s -d "$(hwclock -r)" ) ))"

#####

echo "hwclock:"
hwclock -r
echo "diff: $hwclockdiff"

echo "system:"
date
echo "diff: $ntpserverdiff"

####

echo
if [ \
	-n "$hwclockdiff" \
	-a "$hwclockdiff" -lt "-50" \
	-a -n "$ntpserverdiff" \
	-a "$ntpserverdiff" -gt "50" \
	]
then
        echo hard-sync
        hwclock -s
        service ntpd try-restart
else
	echo sync-not-required
fi
echo "done."