submit-metrics.rb

#!/usr/bin/env ruby
#
require 'yaml'
require 'librato/metrics'

hostname = `hostname`.strip
queue    = Librato::Metrics::Queue.new
config   = YAML::load_file(File.dirname(__FILE__) + '/metrics.yml')
Librato::Metrics.authenticate(config.fetch('username'), config.fetch('token'))

config.fetch('metrics', {}).each do |name, command|
  metric = name.to_sym
  count  = `#{command}`.to_i
  queue.add(metric => { source: hostname, value: count })
end

queue.submit