old_contents: # Software License Agreement (BSD License)
  #
  # Copyright (c) 2009-2011, Eucalyptus Systems, Inc.
  # All rights reserved.
  #
  # Redistribution and use of this software in source and binary forms, with or
  # without modification, are permitted provided that the following conditions
  # are met:
  #
  #   Redistributions of source code must retain the above
  #   copyright notice, this list of conditions and the
  #   following disclaimer.
  #
  #   Redistributions in binary form must reproduce the above
  #   copyright notice, this list of conditions and the
  #   following disclaimer in the documentation and/or other
  #   materials provided with the distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  #
  # Author: Neil Soman neil@eucalyptus.com
  #         Mitch Garnaat mgarnaat@eucalyptus.com
  
  from boto.utils import get_instance_metadata
  from exceptions import MetadataReadError
  
  class MetaData(object):
  
      def __init__(self):
          self.md = get_instance_metadata()
          
      def get_instance_metadata(self, key):
          try:
              value = self.md[key]
          except KeyError:
              raise MetadataReadError
          return value
  
      def get_instance_ramdisk(self):
          return self.get_instance_metadata('ramdisk-id')
  
      def get_instance_kernel(self):
          return self.get_instance_metadata('kernel-id')
  
      def get_instance_product_codes(self):
          return self.get_instance_metadata('product-codes')
  
      def get_ancestor_ami_ids(self):
          return self.get_instance_metadata('ancestor-ami-ids')
  
      def get_instance_block_device_mappings(self):
          return self.get_instance_metadata('block-device-mapping')
  
  
new_contents: # Software License Agreement (BSD License)
  #
  # Copyright (c) 2009-2011, Eucalyptus Systems, Inc.
  # All rights reserved.
  #
  # Redistribution and use of this software in source and binary forms, with or
  # without modification, are permitted provided that the following conditions
  # are met:
  #
  #   Redistributions of source code must retain the above
  #   copyright notice, this list of conditions and the
  #   following disclaimer.
  #
  #   Redistributions in binary form must reproduce the above
  #   copyright notice, this list of conditions and the
  #   following disclaimer in the documentation and/or other
  #   materials provided with the distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  #
  # Author: Neil Soman neil@eucalyptus.com
  #         Mitch Garnaat mgarnaat@eucalyptus.com
  
  from boto.utils import get_instance_metadata
  from exceptions import MetadataReadError
  
  class MetaData(object):
  
      def __init__(self):
          self.md = get_instance_metadata()
  
      def get_instance_metadata(self, key):
          if self.md is None:
              raise IOError('failed to contact metadata service')
          try:
              return self.md[key]
          except KeyError:
              raise MetadataReadError
  
      def get_instance_ramdisk(self):
          return self.get_instance_metadata('ramdisk-id')
  
      def get_instance_kernel(self):
          return self.get_instance_metadata('kernel-id')
  
      def get_instance_product_codes(self):
          return self.get_instance_metadata('product-codes')
  
      def get_ancestor_ami_ids(self):
          return self.get_instance_metadata('ancestor-ami-ids')
  
      def get_instance_block_device_mappings(self):
          return self.get_instance_metadata('block-device-mapping')
  
  
subject: Check for metadata that are missing altogether