#!/usr/bin/env ruby
#
# Throw this into a cron job to notify us when our chef clients
# have gone AWOL.
#
# dave@wegoto12.com
#
require 'rubygems'
require 'chef'
require 'ruby-units'

@hour_ago = "1 hour".before

Chef::Config.from_file("/etc/chef/client.rb")

rs = Chef::CouchDB.new.list("nodes", true)
rows = rs["rows"].collect { |r| r["value"] }

rows.each do |r|
  @last_seen = Time.at(r.ohai_time)
  if @last_seen < @hour_ago
    puts "#{r.name} has not checked in with Chef in since #{@last_seen}"
  end
end