bin/metrics-ntpdate.rb
#! /usr/bin/env ruby
# frozen_string_literal: true
#
# ntpdate-metrics
#
# DESCRIPTION:
#
# OUTPUT:
# metric data
#
# PLATFORMS:
# Linux
#
# DEPENDENCIES:
# gem: sensu-plugin
# gem: socket
#
# USAGE:
#
# NOTES:
#
# LICENSE:
# Copyright 2014 Mitsutoshi Aoe <maoe@foldr.in>
# Released under the same terms as Sensu (the MIT license); see LICENSE
# for details.
#
require 'sensu-plugin/metric/cli'
require 'socket'
class NtpdateMetrics < Sensu::Plugin::Metric::CLI::Graphite
option :server,
description: 'NTP server(s)',
long: '--server SERVER1[,SERVER2,..]',
default: ['localhost'],
proc: proc { |str| str.split(',') }
option :scheme,
description: 'Metric naming scheme, text to prepend to metric',
short: '-s SCHEME',
long: '--scheme SCHEME',
default: Socket.gethostname
def run
stats = get_ntpdate(config[:server])
critical 'Failed to get/parse ntpdate -q output' if stats[:delay].nil?
stats.each do |key, value|
output([config[:scheme], :ntpdate, key].join('.'), value)
end
ok
end
def get_ntpdate(servers)
float = /-?\d+\.\d+/
pattern = /offset (#{float}), delay (#{float})/
stats = { offset: nil, delay: nil }
`ntpdate -q #{servers.join(' ')}`.scan(pattern).each do |parsed|
offset, delay = parsed
offset = Float(offset)
delay = Float(delay)
if stats[:delay].nil? || delay <= stats[:delay]
stats[:delay] = delay
stats[:offset] = offset
end
end
stats
end
end