132 lines
5.5 KiB
Python
132 lines
5.5 KiB
Python
# Copyright 2017-2018 Wind River Inc
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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OpenStack Driver
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"""
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import collections
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from oslo_concurrency import lockutils
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from oslo_log import log
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from oslo_utils import timeutils
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from dcorch.common import consts
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from dcorch.drivers.openstack.keystone_v3 import KeystoneClient
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from dcorch.drivers.openstack.sysinv_v1 import SysinvClient
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# Gap, in seconds, to determine whether the given token is about to expire
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STALE_TOKEN_DURATION = 60
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LOG = log.getLogger(__name__)
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class OpenStackDriver(object):
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@lockutils.synchronized('dcorch-openstackdriver-platform')
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def __init__(self, region_name=consts.VIRTUAL_MASTER_CLOUD,
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auth_url=None):
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# Check if objects are cached and try to use those
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self.os_clients_dict = collections.defaultdict(dict)
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self._identity_tokens = {}
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self.region_name = region_name
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if ((region_name in self.os_clients_dict) and
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('keystone' in self.os_clients_dict[region_name]) and
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self._is_token_valid(region_name)):
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self.keystone_client = \
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self.os_clients_dict[region_name]['keystone']
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else:
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LOG.info("get new keystone client for subcloud %s", region_name)
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self.keystone_client = KeystoneClient(region_name, auth_url)
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self.os_clients_dict[region_name]['keystone'] = \
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self.keystone_client
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if ((region_name in self.os_clients_dict) and
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('sysinv' in self.os_clients_dict[region_name]) and
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self._is_token_valid(region_name)):
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LOG.info('Using cached OS client objects %s' % region_name)
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self.sysinv_client = self.os_clients_dict[
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region_name]['sysinv']
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else:
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# Create new objects and cache them
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LOG.debug("Creating fresh OS Clients objects %s" % region_name)
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self.os_clients_dict[
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region_name] = collections.defaultdict(dict)
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try:
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self.sysinv_client = SysinvClient(region_name,
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self.keystone_client.session)
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self.os_clients_dict[region_name][
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'sysinv'] = self.sysinv_client
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except Exception as exception:
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LOG.error('sysinv_client region %s error: %s' %
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(region_name, exception.message))
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@lockutils.synchronized('dcorch-openstackdriver-platform')
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def delete_region_clients(self, region_name, clear_token=False):
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LOG.warn("delete_region_clients=%s, clear_token=%s" %
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(region_name, clear_token))
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if region_name in self.os_clients_dict:
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del self.os_clients_dict[region_name]
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if clear_token:
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self._identity_tokens[region_name] = None
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def _is_token_valid(self, region_name):
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try:
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keystone = \
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self.os_clients_dict[region_name]['keystone'].keystone_client
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if (not self._identity_tokens
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or region_name not in self._identity_tokens
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or not self._identity_tokens[region_name]):
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self._identity_tokens[region_name] = \
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keystone.tokens.validate(keystone.session.get_token())
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LOG.info("Get new token for subcloud %s expires_at=%s" %
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(region_name,
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self._identity_tokens[region_name]['expires_at']))
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# Reset the cached dictionary
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self.os_clients_dict[region_name] = \
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collections.defaultdict(dict)
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return False
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token = \
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keystone.tokens.validate(self._identity_tokens[region_name])
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if token != self._identity_tokens[region_name]:
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LOG.info("updating token %s to %s" %
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(self._identity_tokens[region_name], token))
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self._identity_tokens[region_name] = token
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self.os_clients_dict[region_name] = \
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collections.defaultdict(dict)
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return False
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except Exception as exception:
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LOG.info('_is_token_valid handle: %s', exception.message)
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# Reset the cached dictionary
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self.os_clients_dict[region_name] = collections.defaultdict(dict)
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self._identity_tokens[region_name] = None
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return False
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expiry_time = timeutils.normalize_time(timeutils.parse_isotime(
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self._identity_tokens[region_name]['expires_at']))
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if timeutils.is_soon(expiry_time, STALE_TOKEN_DURATION):
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LOG.info("The cached keystone token for subcloud %s "
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"will expire soon %s" %
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(region_name,
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self._identity_tokens[region_name]['expires_at']))
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# Reset the cached dictionary
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self.os_clients_dict[region_name] = collections.defaultdict(dict)
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self._identity_tokens[region_name] = None
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return False
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else:
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return True
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