Load Balancing as a Service (LBaaS) for OpenStack
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# Copyright 2018 Rackspace, US Inc.
#
# 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.
from octavia_lib.api.drivers import exceptions as lib_exceptions
from oslo_config import cfg
from oslo_log import log as logging
from pecan import expose as pecan_expose
from pecan import request as pecan_request
from wsme import types as wtypes
from wsmeext import pecan as wsme_pecan
from octavia.api.drivers import driver_factory
from octavia.api.v2.controllers import base
from octavia.api.v2.types import provider as provider_types
from octavia.common import constants
from octavia.common import exceptions
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
class ProviderController(base.BaseController):
RBAC_TYPE = constants.RBAC_PROVIDER
def __init__(self):
super(ProviderController, self).__init__()
@wsme_pecan.wsexpose(provider_types.ProvidersRootResponse, [wtypes.text],
ignore_extra_args=True)
def get_all(self, fields=None):
"""List enabled provider drivers and their descriptions."""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ALL)
enabled_providers = CONF.api_settings.enabled_provider_drivers
response_list = [
provider_types.ProviderResponse(name=key, description=value) for
key, value in enabled_providers.items()]
if fields is not None:
response_list = self._filter_fields(response_list, fields)
return provider_types.ProvidersRootResponse(providers=response_list)
@pecan_expose()
def _lookup(self, provider, *remainder):
"""Overridden pecan _lookup method for custom routing.
Currently it checks if this was a flavor capabilities request and
routes the request to the FlavorCapabilitiesController.
"""
if provider and remainder:
if remainder[0] == 'flavor_capabilities':
return (FlavorCapabilitiesController(provider=provider),
remainder[1:])
if remainder[0] == 'availability_zone_capabilities':
return (
AvailabilityZoneCapabilitiesController(provider=provider),
remainder[1:])
return None
class FlavorCapabilitiesController(base.BaseController):
RBAC_TYPE = constants.RBAC_PROVIDER_FLAVOR
def __init__(self, provider):
super(FlavorCapabilitiesController, self).__init__()
self.provider = provider
@wsme_pecan.wsexpose(provider_types.FlavorCapabilitiesResponse,
[wtypes.text], ignore_extra_args=True,
status_code=200)
def get_all(self, fields=None):
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ALL)
self.driver = driver_factory.get_driver(self.provider)
try:
metadata_dict = self.driver.get_supported_flavor_metadata()
except lib_exceptions.NotImplementedError as e:
LOG.warning('Provider %s get_supported_flavor_metadata() '
'reported: %s', self.provider, e.operator_fault_string)
raise exceptions.ProviderNotImplementedError(
prov=self.provider, user_msg=e.user_fault_string)
# Apply any valid filters provided as URL parameters
name_filter = None
description_filter = None
pagination_helper = pecan_request.context.get(
constants.PAGINATION_HELPER)
if pagination_helper:
name_filter = pagination_helper.params.get(constants.NAME)
description_filter = pagination_helper.params.get(
constants.DESCRIPTION)
if name_filter:
metadata_dict = {
key: value for key, value in metadata_dict.items() if
key == name_filter}
if description_filter:
metadata_dict = {
key: value for key, value in metadata_dict.items() if
value == description_filter}
response_list = [
provider_types.ProviderResponse(name=key, description=value) for
key, value in metadata_dict.items()]
if fields is not None:
response_list = self._filter_fields(response_list, fields)
return provider_types.FlavorCapabilitiesResponse(
flavor_capabilities=response_list)
class AvailabilityZoneCapabilitiesController(base.BaseController):
RBAC_TYPE = constants.RBAC_PROVIDER_AVAILABILITY_ZONE
def __init__(self, provider):
super(AvailabilityZoneCapabilitiesController, self).__init__()
self.provider = provider
@wsme_pecan.wsexpose(provider_types.AvailabilityZoneCapabilitiesResponse,
[wtypes.text], ignore_extra_args=True,
status_code=200)
def get_all(self, fields=None):
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ALL)
self.driver = driver_factory.get_driver(self.provider)
try:
metadata_dict = (
self.driver.get_supported_availability_zone_metadata())
except lib_exceptions.NotImplementedError as e:
LOG.warning(
'Provider %s get_supported_availability_zone_metadata() '
'reported: %s', self.provider, e.operator_fault_string)
raise exceptions.ProviderNotImplementedError(
prov=self.provider, user_msg=e.user_fault_string)
# Apply any valid filters provided as URL parameters
name_filter = None
description_filter = None
pagination_helper = pecan_request.context.get(
constants.PAGINATION_HELPER)
if pagination_helper:
name_filter = pagination_helper.params.get(constants.NAME)
description_filter = pagination_helper.params.get(
constants.DESCRIPTION)
if name_filter:
metadata_dict = {
key: value for key, value in metadata_dict.items() if
key == name_filter}
if description_filter:
metadata_dict = {
key: value for key, value in metadata_dict.items() if
value == description_filter}
response_list = [
provider_types.ProviderResponse(name=key, description=value) for
key, value in metadata_dict.items()]
if fields is not None:
response_list = self._filter_fields(response_list, fields)
return provider_types.AvailabilityZoneCapabilitiesResponse(
availability_zone_capabilities=response_list)