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# Copyright (c) 2016 Cable Television Laboratories, Inc. ("CableLabs")
# and others. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from novaclient.exceptions import NotFound
from snaps.openstack.openstack_creator import OpenStackComputeObject
from snaps.openstack.utils import nova_utils
__author__ = 'spisarski'
logger = logging.getLogger('create_flavor')
MEM_PAGE_SIZE_ANY = {'hw:mem_page_size': 'any'}
MEM_PAGE_SIZE_LARGE = {'hw:mem_page_size': 'large'}
class OpenStackFlavor(OpenStackComputeObject):
"""
Class responsible for creating a user in OpenStack
"""
def __init__(self, os_creds, flavor_settings):
"""
Constructor
:param os_creds: The OpenStack connection credentials
:param flavor_settings: The flavor settings
:return:
"""
super(self.__class__, self).__init__(os_creds)
self.flavor_settings = flavor_settings
self.__flavor = None
def initialize(self):
"""
Loads the existing OpenStack flavor
:return: The Flavor domain object or None
"""
super(self.__class__, self).initialize()
self.__flavor = nova_utils.get_flavor_by_name(
self._nova, self.flavor_settings.name)
if self.__flavor:
logger.info('Found flavor with name - %s',
self.flavor_settings.name)
return self.__flavor
def create(self):
"""
Creates the image in OpenStack if it does not already exist
:return: The OpenStack flavor object
"""
self.initialize()
if not self.__flavor:
self.__flavor = nova_utils.create_flavor(
self._nova, self.flavor_settings)
if self.flavor_settings.metadata:
nova_utils.set_flavor_keys(self._nova, self.__flavor,
self.flavor_settings.metadata)
else:
logger.info('Did not create flavor due to cleanup mode')
return self.__flavor
def clean(self):
"""
Cleanse environment of all artifacts
:return: void
"""
if self.__flavor:
try:
nova_utils.delete_flavor(self._nova, self.__flavor)
except NotFound:
pass
self.__flavor = None
def get_flavor(self):
"""
Returns the OpenStack flavor object
:return:
"""
return self.__flavor
class FlavorSettings:
"""
Configuration settings for OpenStack flavor creation
"""
def __init__(self, **kwargs):
"""
Constructor
:param name: the flavor's name (required)
:param flavor_id: the string ID (default 'auto')
:param ram: the required RAM in MB (required)
:param disk: the size of the root disk in GB (required)
:param vcpus: the number of virtual CPUs (required)
:param ephemeral: the size of the ephemeral disk in GB (default 0)
:param swap: the size of the dedicated swap disk in GB (default 0)
:param rxtx_factor: the receive/transmit factor to be set on ports if
backend supports QoS extension (default 1.0)
:param is_public: denotes whether or not the flavor is public
(default True)
:param metadata: freeform dict() for special metadata
"""
self.name = kwargs.get('name')
if kwargs.get('flavor_id'):
self.flavor_id = kwargs['flavor_id']
else:
self.flavor_id = 'auto'
self.ram = kwargs.get('ram')
self.disk = kwargs.get('disk')
self.vcpus = kwargs.get('vcpus')
if kwargs.get('ephemeral'):
self.ephemeral = kwargs['ephemeral']
else:
self.ephemeral = 0
if kwargs.get('swap'):
self.swap = kwargs['swap']
else:
self.swap = 0
if kwargs.get('rxtx_factor'):
self.rxtx_factor = kwargs['rxtx_factor']
else:
self.rxtx_factor = 1.0
if kwargs.get('is_public') is not None:
self.is_public = kwargs['is_public']
else:
self.is_public = True
if kwargs.get('metadata'):
self.metadata = kwargs['metadata']
else:
self.metadata = None
if not self.name or not self.ram or not self.disk or not self.vcpus:
raise FlavorSettingsError(
'The attributes name, ram, disk, and vcpus are required for'
'FlavorSettings')
if not isinstance(self.ram, int):
raise FlavorSettingsError('The ram attribute must be a integer')
if not isinstance(self.disk, int):
raise FlavorSettingsError('The ram attribute must be a integer')
if not isinstance(self.vcpus, int):
raise FlavorSettingsError('The vcpus attribute must be a integer')
if self.ephemeral and not isinstance(self.ephemeral, int):
raise FlavorSettingsError(
'The ephemeral attribute must be an integer')
if self.swap and not isinstance(self.swap, int):
raise FlavorSettingsError('The swap attribute must be an integer')
if self.rxtx_factor and not isinstance(self.rxtx_factor, (int, float)):
raise FlavorSettingsError(
'The is_public attribute must be an integer or float')
if self.is_public and not isinstance(self.is_public, bool):
raise FlavorSettingsError(
'The is_public attribute must be a boolean')
class FlavorSettingsError(Exception):
"""
Exception to be thrown when an flavor settings are incorrect
"""
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