snaps/openstack/create_flavor.py

   1 # Copyright (c) 2016 Cable Television Laboratories, Inc. ("CableLabs")
   2 #                    and others.  All rights reserved.
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at:
   7 #
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 import logging
  16
  17 from novaclient.exceptions import NotFound
  18
  19 from snaps.config.flavor import FlavorConfig
  20 from snaps.openstack.openstack_creator import OpenStackComputeObject
  21 from snaps.openstack.utils import nova_utils
  22
  23 __author__ = 'spisarski'
  24
  25 logger = logging.getLogger('create_flavor')
  26
  27 MEM_PAGE_SIZE_ANY = {'hw:mem_page_size': 'any'}
  28 MEM_PAGE_SIZE_LARGE = {'hw:mem_page_size': 'large'}
  29
  30
  31 class OpenStackFlavor(OpenStackComputeObject):
  32     """
  33     Class responsible for creating a user in OpenStack
  34     """
  35
  36     def __init__(self, os_creds, flavor_settings):
  37         """
  38         Constructor
  39         :param os_creds: The OpenStack connection credentials
  40         :param flavor_settings: a FlavorConfig instance
  41         :return:
  42         """
  43         super(self.__class__, self).__init__(os_creds)
  44
  45         self.flavor_settings = flavor_settings
  46         self.__flavor = None
  47
  48     def initialize(self):
  49         """
  50         Loads the existing OpenStack flavor
  51         :return: The Flavor domain object or None
  52         """
  53         super(self.__class__, self).initialize()
  54
  55         self.__flavor = nova_utils.get_flavor_by_name(
  56             self._nova, self.flavor_settings.name)
  57         if self.__flavor:
  58             logger.info('Found flavor with name - %s',
  59                         self.flavor_settings.name)
  60         return self.__flavor
  61
  62     def create(self):
  63         """
  64         Creates the image in OpenStack if it does not already exist
  65         :return: The OpenStack flavor object
  66         """
  67         self.initialize()
  68         if not self.__flavor:
  69             self.__flavor = nova_utils.create_flavor(
  70                 self._nova, self.flavor_settings)
  71             if self.flavor_settings.metadata:
  72                 nova_utils.set_flavor_keys(self._nova, self.__flavor,
  73                                            self.flavor_settings.metadata)
  74
  75         return self.__flavor
  76
  77     def clean(self):
  78         """
  79         Cleanse environment of all artifacts
  80         :return: void
  81         """
  82         if self.__flavor:
  83             try:
  84                 nova_utils.delete_flavor(self._nova, self.__flavor)
  85             except NotFound:
  86                 pass
  87
  88             self.__flavor = None
  89
  90         super(self.__class__, self).clean()
  91
  92     def get_flavor(self):
  93         """
  94         Returns the OpenStack flavor object
  95         :return:
  96         """
  97         return self.__flavor
  98
  99
 100 class FlavorSettings(FlavorConfig):
 101     """
 102     Configuration settings for OpenStack flavor creation
 103     """
 104
 105     def __init__(self, **kwargs):
 106         from warnings import warn
 107         warn('Use snaps.config.flavor.FlavorConfig instead',
 108              DeprecationWarning)
 109         super(self.__class__, self).__init__(**kwargs)