#!/bin/sh
# -*- sh -*-

: << =cut

=head1 NAME

ntp_pool_score_ - Wildcard plugin to monitor the score assigned to a server
from pool.ntp.org . This is achieved by fetching the cvs data from
http://www.pool.ntp.org/scores/IP_ADDRESS/log?limit=1 using wget.

=head1 CONFIGURATION

This is a wildcard plugin. The wildcard suffix link will be the server to be
monitored.

This plugin uses the following configuration variables:

 [ntp_pool_score_*]
  env.warning - score below which a warning will be triggered
  env.critical - score below which the value becomes critical

=head2 DEFAULT CONFIGURATION

The default configuration is to set warning to 15 and critical to 10.

=head2 EXAMPLE WILDCARD USAGE

C<ln -s /usr/share/munin/plugins/ntp_pool_score_ /etc/munin/plugins/ntp_pool_score_SERVER_IP

...will monitor the score of the server with ip address SERVER_IP

=head1 AUTHOR

Tocho Tochev
tocho AT tochev DOT net

=head1 LICENSE

 GNU General Public License, version 2
 http://www.gnu.org/licenses/gpl-2.0.html

=head1 MAGIC MARKERS

 #%# family=manual

=cut

target=`basename $0 | sed 's/^ntp_pool_score_//g'`

if [ "$target"x = "x" ]; then
    echo "Please call using ntp_pool_score_IP" >&2
    exit 1
fi

# Check if config was requested
if [ "$1" = "config" ]; then

	# Configure graph
    echo "graph_title NTP Pool Score for $target"
    echo 'graph_args -l -25 -u 25'
    echo 'graph_vlabel Score'
    echo 'graph_category time'
    echo "graph_info NTP Pool Score for $target"
    echo "score.warning ${warning:-15}":
    echo "score.critical ${critical:-10}":
	echo "score.info Score for $target"
	echo "score.label score"

	exit 0
fi


# Get the score
# the score can be a bit outdated but do not worry about that
SCORE=$(wget "http://www.pool.ntp.org/scores/$target/log?limit=1" \
                --timeout=30 -O - 2>/dev/null \
                | tail -n 1 | awk -F ',' '{print $5}')

if echo "$SCORE" | grep -q '^-\?[0-9.]\+$'; then
    echo "score.value $SCORE"
else
    echo "score.value U"
fi