Chrony Nagios Plugin

check_chrony

#!/bin/bash

# Changes by Erik Kristensen
#  
# Changelog (2018/01/31)
#  - Improved debugging, just set DEBUG=true in shell env
#  - Can set critical, warning and service name via ENV vars or command line opts
#  - Improved if statements for checking warning, critical conditions
#  - Errors unknown if `bc` command line tool is not installed
#

# Original Source: https://exchange.nagios.org/directory/Plugins/Network-Protocols/NTP-and-Time/check_ntp(chrony)/details
# Original Author
#   Author: Abd Alhameed Ghaith
#   License: GPL
#   Date:06/04/2016
#   Purpose: check the chrony service if its running or not ,if running them it will check if the Leap status is in normal status or not.if not this means that you have to check the connectivity between your server and NTP server.if all the previous is working well,the script will complare between local machine time and NTP time and give the nagios status accordingly.

if [ "x${DEBUG}" != "x" ]; then
  set -e
  set -x
fi

if [ "x`which bc`" == "x" ]; then
  echo "bc command is required for this plugin"
  exit 3
fi

SERVICE_NAME=${SERVICE_NAME:-chrony}
WARNING_VALUE=${WARNING_VALUE:-500}
CRITICAL_VALUE=${CRITICAL_VALUE:-1000}

NUMBER_VALIDATION='^[0-9]+$'
OPTS=`getopt -o w:c:s: --long warning:,critical:,service-name: -n 'parse-iotions' -- "$@"`

if [ $? != 0 ]; then
  echo "Failed parsing options." >&2
  exit 3
fi

eval set -- "$OPTS"

while true; do
  case "$1" in
    -w | --warning )      WARNING_VALUE="$2"; shift 2;;
    -c | --critical )     CRITICAL_VALUE="$2"; shift 2;;
    -s | --service-name ) SERVICE_NAME="$2"; shift 2;;
    -- ) shift; break ;;
    * ) break ;;
  esac
done

if ! [[ $WARNING_VALUE =~ $NUMBER_VALIDATION ]] || ! [[ $CRITICAL_VALUE =~ $NUMBER_VALIDATION ]]; then
  echo 'Please provide only number in the warning and critical values'
  exit 3
fi

if [[ $WARNING_VALUE -gt $CRITICAL_VALUE ]] || [[ $WARNING_VALUE -eq $CRITICAL_VALUE ]] ; then
  echo "The Critical Value (${CRITICAL_VALUE}) must be larger than the Warning Value (${WARNING_VALUE})"
  exit 3
fi

CHECK_SERVICE=`systemctl status ${SERVICE_NAME}.service | grep Active | awk -F '(' '{ print $2 }' | awk -F ')' '{ print $1 }'`
if [[ $CHECK_SERVICE == 'dead' ]]; then
	echo "CRITICAL - The service ${SERVICE_NAME} is not running"
	exit 2
fi

CHECK_SERVER_SYNC=`chronyc tracking | grep 'Leap status' | awk -F ':' '{ print $2 }' | sed -e 's/^ //'`
if [[ $CHECK_SERVER_SYNC == 'Not synchronised' ]]; then 
	echo  "CRITICAL - Server is not synchronised with the ntp server"
	exit 2
fi

CHECK_TIME_DIFF=`chronyc tracking | grep 'System time' | awk -F ':' '{ print $2 }' | awk '{ print $1 }'| sed -e 's/^ //'`
CHECK_TIME_DIFF_INT=`chronyc tracking | grep 'System time' | awk -F ':' '{ print $2 }' | awk '{ print $1 }'| sed -e 's/^ //' | awk -F '.' '{ print $1 }'`
DIFF_IN_SECOND=`echo "(($CHECK_TIME_DIFF * 1000))" | bc`
FAST_SLOW_VALUE=`chronyc tracking | grep 'System time' | awk -F ':' '{ print $2 }' | awk '{ print $3 }'| sed -e 's/^ //'`

if [[ $CHECK_TIME_DIFF_INT -ge $CRITICAL_VALUE ]]; then
	echo "CRITICAL time is $CHECK_TIME_DIFF $FAST_SLOW_VALUE of NTP Time"
	echo "|Time Differences in=$CHECK_TIME_DIFF"
	exit 2
fi

if [[ $CHECK_TIME_DIFF_INT -gt $WARNING_VALUE  ]]; then
  echo "WARNING time is $CHECK_TIME_DIFF_INT $FAST_SLOW_VALUE of NTP Time"
  echo "|Time Differences in=$CHECK_TIME_DIFF"
  exit 1
fi


echo "OK - time is $CHECK_TIME_DIFF $FAST_SLOW_VALUE of NTP Time"
echo "|Time Differences in=$CHECK_TIME_DIFF"
exit 0

Very useful, thank you!

Line 76 has a typo, should be 'print' not 'rint'. Thanks for your updates, seems to work for me.

Fixed.