#!/bin/sh
#
# Plugin to measure OpenNTPd offset, delay and jitter for the active peer.
#
# Usage: Place it in the munin plugins directory (/usr/local/etc/munin/plugins/
# or /etc/munin/plugins/). Might require running as root in order to access the
# ntpctl socket.
#
# AUTHOR:  Vladimir Krstulja <info@acheronmedia.com>
# LICENSE: GPLv2
#
#%# family=auto
#%# capabilities=autoconf

NTPCTL=`which ntpctl`

# Config
if [ "$1" = "autoconf" ] ; then
	if [ -f "$NTPCTL" ]; then
		echo 'yes'
	else
		echo 'no (no ntpctl)'
	fi
	exit 0
fi

# Autoconf
if [ "$1" = "config" ] ; then
	echo "graph_title OpenNTP offset statistics for active peer"
	echo "graph_args --base 1000 --vertical-label seconds --lower-limit 0"
	echo "graph_category time"
	echo "graph_info Current status: `$NTPCTL -s status`"
	echo "delay.label Delay"
	echo "delay.cdef delay,1000,/"
	echo "offset.label Offset"
	echo "offset.cdef offset,1000,/"
	echo "jitter.label Jitter"
	echo "jitter.cdef jitter,1000,/"
	exit 0
fi

# Main plugin function
$NTPCTL -s all | awk '/\*/{printf("offset.value %.3f\ndelay.value %.3f\njitter.value %.3f\n",$7,$8,$9)}'