old_contents: from checks import AgentCheck
  
  import snakebite.client
  
  class HDFSCheck(AgentCheck):
      """Report on free space and space used in HDFS.
      """
  
      def check(self, instance):
          if 'namenode' not in instance:
              self.log.info('Missing key \'namenode\' in HDFSCheck config')
              return
  
          hostport = instance['namenode']
          if ':' in hostport:
              host, _, port = hostport.partition(':')
              port = int(port)
          else:
              host = hostport
              port = 8020
  
          hdfs = snakebite.client.Client(host, port)
          stats = hdfs.df()
          # {'used': 2190859321781L,
          #  'capacity': 76890897326080L,
          #  'under_replicated': 0L,
          #  'missing_blocks': 0L,
          #  'filesystem': 'hdfs://hostname:port',
          #  'remaining': 71186818453504L,
          #  'corrupt_blocks': 0L}
  
          self.gauge('hdfs.used', stats['used'])
          self.gauge('hdfs.free', stats['remaining'])
          self.gauge('hdfs.capacity', stats['capacity'])
          self.gauge('hdfs.under_replicated', stats['under_replicated'])
          self.gauge('hdfs.missing_blocks', stats['missing_blocks'])
          self.gauge('hdfs.corrupt_blocks', stats['corrupt_blocks'])
  
  if __name__ == '__main__':
      check, instances = HDFSCheck.from_yaml('./hdfs.yaml')
      for instance in instances:
          check.check(instance)
          print "Events: %r" % check.get_events()
          print "Metrics: %r" % check.get_metrics()
  
  
new_contents: from checks import AgentCheck
  
  import snakebite.client
  
  class HDFSCheck(AgentCheck):
      """Report on free space and space used in HDFS.
      """
  
      def check(self, instance):
          if 'namenode' not in instance:
              self.log.info('Missing key \'namenode\' in HDFSCheck config')
              return
  
          hostport = instance['namenode']
          if ':' in hostport:
              host, _, port = hostport.partition(':')
              port = int(port)
          else:
              host = hostport
              port = 8020
  
          hdfs = snakebite.client.Client(host, port)
          stats = hdfs.df()
          # {'used': 2190859321781L,
          #  'capacity': 76890897326080L,
          #  'under_replicated': 0L,
          #  'missing_blocks': 0L,
          #  'filesystem': 'hdfs://hostname:port',
          #  'remaining': 71186818453504L,
          #  'corrupt_blocks': 0L}
  
          self.gauge('hdfs.used', stats['used'])
          self.gauge('hdfs.free', stats['remaining'])
          self.gauge('hdfs.capacity', stats['capacity'])
          self.gauge('hdfs.in_use', float(stats['used']) / float(stats['capacity']))
          self.gauge('hdfs.under_replicated', stats['under_replicated'])
          self.gauge('hdfs.missing_blocks', stats['missing_blocks'])
          self.gauge('hdfs.corrupt_blocks', stats['corrupt_blocks'])
  
  if __name__ == '__main__':
      check, instances = HDFSCheck.from_yaml('./hdfs.yaml')
      for instance in instances:
          check.check(instance)
          print "Events: %r" % check.get_events()
          print "Metrics: %r" % check.get_metrics()
  
  
subject: add 'in_use' (percent used) gauge