213 lines
8.0 KiB
Python
213 lines
8.0 KiB
Python
# Copyright 2013 IBM Corp.
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#
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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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Handles all requests to Nova.
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"""
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from keystoneauth1 import identity
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from keystoneauth1 import loading as ks_loading
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from novaclient import api_versions
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from novaclient import client as nova_client
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from novaclient import exceptions as nova_exceptions
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from oslo_config import cfg
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from oslo_log import log as logging
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from requests import exceptions as request_exceptions
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from cinder.db import base
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from cinder import exception
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from cinder import service_auth
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nova_opts = [
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cfg.StrOpt('region_name',
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help='Name of nova region to use. Useful if keystone manages '
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'more than one region.',
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deprecated_name="os_region_name",
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deprecated_group="DEFAULT"),
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cfg.StrOpt('interface',
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default='public',
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choices=['public', 'admin', 'internal'],
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help='Type of the nova endpoint to use. This endpoint will '
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'be looked up in the keystone catalog and should be '
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'one of public, internal or admin.'),
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cfg.StrOpt('token_auth_url',
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help='The authentication URL for the nova connection when '
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'using the current user''s token'),
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]
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NOVA_GROUP = 'nova'
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CONF = cfg.CONF
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nova_session_opts = ks_loading.get_session_conf_options()
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nova_auth_opts = ks_loading.get_auth_common_conf_options()
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CONF.register_opts(nova_opts, group=NOVA_GROUP)
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CONF.register_opts(nova_session_opts, group=NOVA_GROUP)
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CONF.register_opts(nova_auth_opts, group=NOVA_GROUP)
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LOG = logging.getLogger(__name__)
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NOVA_API_VERSION = "2.1"
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nova_extensions = [ext for ext in
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nova_client.discover_extensions(NOVA_API_VERSION)
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if ext.name in ("assisted_volume_snapshots",
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"list_extensions",
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"server_external_events")]
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def _get_identity_endpoint_from_sc(context):
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# Search for the identity endpoint in the service catalog
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for service in context.service_catalog:
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if service.get('type') != 'identity':
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continue
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for endpoint in service['endpoints']:
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if (not CONF[NOVA_GROUP].region_name or
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endpoint.get('region') == CONF[NOVA_GROUP].region_name):
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return endpoint.get(CONF[NOVA_GROUP].interface + 'URL')
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raise nova_exceptions.EndpointNotFound()
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def novaclient(context, privileged_user=False, timeout=None, api_version=None):
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"""Returns a Nova client
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@param privileged_user:
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If True, use the account from configuration
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(requires 'auth_type' and the other usual Keystone authentication
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options to be set in the [nova] section)
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@param timeout:
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Number of seconds to wait for an answer before raising a
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Timeout exception (None to disable)
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@param api_version:
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api version of nova
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"""
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if privileged_user and CONF[NOVA_GROUP].auth_type:
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LOG.debug('Creating Keystone auth plugin from conf')
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n_auth = ks_loading.load_auth_from_conf_options(CONF, NOVA_GROUP)
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else:
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if CONF[NOVA_GROUP].token_auth_url:
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url = CONF[NOVA_GROUP].token_auth_url
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else:
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url = _get_identity_endpoint_from_sc(context)
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LOG.debug('Creating Keystone token plugin using URL: %s', url)
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n_auth = identity.Token(auth_url=url,
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token=context.auth_token,
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project_name=context.project_name,
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project_domain_id=context.project_domain_id)
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if CONF.auth_strategy == 'keystone':
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n_auth = service_auth.get_auth_plugin(context, auth=n_auth)
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keystone_session = ks_loading.load_session_from_conf_options(
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CONF,
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NOVA_GROUP,
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auth=n_auth)
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c = nova_client.Client(
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api_versions.APIVersion(api_version or NOVA_API_VERSION),
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session=keystone_session,
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insecure=CONF[NOVA_GROUP].insecure,
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timeout=timeout,
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region_name=CONF[NOVA_GROUP].region_name,
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endpoint_type=CONF[NOVA_GROUP].interface,
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cacert=CONF[NOVA_GROUP].cafile,
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global_request_id=context.global_id,
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extensions=nova_extensions)
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return c
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class API(base.Base):
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"""API for interacting with novaclient."""
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def _get_volume_extended_event(self, server_id, volume_id):
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return {'name': 'volume-extended',
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'server_uuid': server_id,
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'tag': volume_id}
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def _send_events(self, context, events, api_version=None):
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nova = novaclient(context, privileged_user=True,
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api_version=api_version)
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try:
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response = nova.server_external_events.create(events)
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except nova_exceptions.NotFound:
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LOG.warning('Nova returned NotFound for events: %s.', events)
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except Exception:
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LOG.exception('Failed to notify nova on events: %s.', events)
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else:
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if not isinstance(response, list):
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LOG.error('Error response returned from nova: %s.', response)
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return
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response_error = False
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for event in response:
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code = event.get('code')
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if code is None:
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response_error = True
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continue
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if code != 200:
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LOG.warning(
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'Nova event: %s returned with failed status.', event)
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else:
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LOG.info('Nova event response: %s.', event)
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if response_error:
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LOG.error('Error response returned from nova: %s.', response)
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def has_extension(self, context, extension, timeout=None):
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try:
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nova_exts = novaclient(context).list_extensions.show_all()
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except request_exceptions.Timeout:
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raise exception.APITimeout(service='Nova')
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return extension in [e.name for e in nova_exts]
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def update_server_volume(self, context, server_id, src_volid,
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new_volume_id):
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nova = novaclient(context, privileged_user=True)
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nova.volumes.update_server_volume(server_id,
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src_volid,
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new_volume_id)
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def create_volume_snapshot(self, context, volume_id, create_info):
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nova = novaclient(context, privileged_user=True)
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# pylint: disable=E1101
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nova.assisted_volume_snapshots.create(
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volume_id,
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create_info=create_info)
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def delete_volume_snapshot(self, context, snapshot_id, delete_info):
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nova = novaclient(context, privileged_user=True)
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# pylint: disable=E1101
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nova.assisted_volume_snapshots.delete(
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snapshot_id,
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delete_info=delete_info)
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def get_server(self, context, server_id, privileged_user=False,
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timeout=None):
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try:
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return novaclient(context, privileged_user=privileged_user,
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timeout=timeout).servers.get(server_id)
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except nova_exceptions.NotFound:
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raise exception.ServerNotFound(uuid=server_id)
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except request_exceptions.Timeout:
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raise exception.APITimeout(service='Nova')
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def extend_volume(self, context, server_ids, volume_id):
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api_version = '2.51'
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events = [self._get_volume_extended_event(server_id, volume_id)
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for server_id in server_ids]
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self._send_events(context, events, api_version=api_version)
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