Script to parse chef nodes by last-checkin-time

gistfile1.txt

#!/usr/bin/ruby
#
# Filter hosts wose time since last checkin >= X
#
# usage: (process that outputs lines) | filterHosts.rb <#hrs>
# to prune hosts in opscode: knife status *:* | filterHosts.rb <#hrs> | xargs -I % knife node delete % -y

STDIN.each_line {|line|

  #split the line by commas, strip whitespace, map to fields
  time_interval,host,os,ip = line.split(/,/).map {|s|s.strip}

  #split the hours description by spaces, extract first field (the number), convert to integer
  time_parts = time_interval.split(/\s/)
  hours = time_parts[0]

  hrs = hours.split(/m/)[1].to_i

#  puts time_parts.inspect

  # put the result on stdout if the hours > first argument to script coerced to integer
#  puts "#{hrs} #{host}" if hrs > ARGV[0].to_i
  puts host if hrs > ARGV[0].to_i
}