427 lines
18 KiB
Python
427 lines
18 KiB
Python
# Copyright 2014 Rackspace
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# Copyright 2016 Blue Box, an IBM Company
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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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import logging
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from oslo_config import cfg
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from oslo_db import exception as odb_exceptions
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from oslo_utils import excutils
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import pecan
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from stevedore import driver as stevedore_driver
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from wsme import types as wtypes
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from wsmeext import pecan as wsme_pecan
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from octavia.api.v2.controllers import base
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from octavia.api.v2.controllers import l7policy
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from octavia.api.v2.types import listener as listener_types
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from octavia.common import constants
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from octavia.common import data_models
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from octavia.common import exceptions
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from octavia.common import stats
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from octavia.common.tls_utils import cert_parser
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from octavia.db import api as db_api
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from octavia.db import prepare as db_prepare
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class ListenersController(base.BaseController):
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RBAC_TYPE = constants.RBAC_LISTENER
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def __init__(self):
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super(ListenersController, self).__init__()
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self.handler = self.handler.listener
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self.cert_manager = stevedore_driver.DriverManager(
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namespace='octavia.cert_manager',
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name=CONF.certificates.cert_manager,
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invoke_on_load=True,
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).driver
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def _get_db_listener(self, session, id):
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"""Gets a listener object from the database."""
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listener = super(ListenersController, self)._get_db_listener(
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session, id)
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load_balancer_id = listener.load_balancer_id
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db_listener = self.repositories.listener.get(
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session, load_balancer_id=load_balancer_id, id=id)
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if not db_listener:
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LOG.info("Listener %s not found.", id)
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raise exceptions.NotFound(
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resource=data_models.Listener._name(), id=id)
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return db_listener
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@wsme_pecan.wsexpose(listener_types.ListenerRootResponse, wtypes.text,
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[wtypes.text], ignore_extra_args=True)
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def get_one(self, id, fields=None):
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"""Gets a single listener's details."""
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context = pecan.request.context.get('octavia_context')
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db_listener = self._get_db_listener(context.session, id)
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self._auth_validate_action(context, db_listener.project_id,
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constants.RBAC_GET_ONE)
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result = self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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if fields is not None:
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result = self._filter_fields([result], fields)[0]
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return listener_types.ListenerRootResponse(listener=result)
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@wsme_pecan.wsexpose(listener_types.ListenersRootResponse, wtypes.text,
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[wtypes.text], ignore_extra_args=True)
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def get_all(self, project_id=None, fields=None):
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"""Lists all listeners."""
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pcontext = pecan.request.context
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context = pcontext.get('octavia_context')
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query_filter = self._auth_get_all(context, project_id)
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db_listeners, links = self.repositories.listener.get_all_API_list(
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context.session, show_deleted=False,
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pagination_helper=pcontext.get(constants.PAGINATION_HELPER),
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**query_filter)
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result = self._convert_db_to_type(
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db_listeners, [listener_types.ListenerResponse])
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if fields is not None:
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result = self._filter_fields(result, fields)
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return listener_types.ListenersRootResponse(
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listeners=result, listeners_links=links)
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def _test_lb_and_listener_statuses(
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self, session, lb_id, id=None,
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listener_status=constants.PENDING_UPDATE):
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"""Verify load balancer is in a mutable state."""
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lb_repo = self.repositories.load_balancer
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if id:
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if not self.repositories.test_and_set_lb_and_listeners_prov_status(
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session, lb_id, constants.PENDING_UPDATE,
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listener_status, listener_ids=[id]):
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LOG.info("Load Balancer %s is immutable.", lb_id)
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db_lb = lb_repo.get(session, id=lb_id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=lb_id)
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else:
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if not lb_repo.test_and_set_provisioning_status(
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session, lb_id, constants.PENDING_UPDATE):
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db_lb = lb_repo.get(session, id=lb_id)
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LOG.info("Load Balancer %s is immutable.", db_lb.id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=lb_id)
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def _validate_pool(self, session, lb_id, pool_id, listener_protocol):
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"""Validate pool given exists on same load balancer as listener."""
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db_pool = self.repositories.pool.get(
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session, load_balancer_id=lb_id, id=pool_id)
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if not db_pool:
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raise exceptions.NotFound(
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resource=data_models.Pool._name(), id=pool_id)
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self._validate_protocol(listener_protocol, db_pool.protocol)
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def _reset_lb_status(self, session, lb_id):
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# Setting LB back to active because this should be a recoverable error
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self.repositories.load_balancer.update(
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session, lb_id,
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provisioning_status=constants.ACTIVE)
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def _validate_tls_refs(self, tls_refs):
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context = pecan.request.context.get('octavia_context')
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bad_refs = []
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for ref in tls_refs:
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try:
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cert_parser.load_certificate_data(
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self.cert_manager, ref, context)
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except exceptions.UnreadablePKCS12:
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raise
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except Exception:
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bad_refs.append(ref)
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if bad_refs:
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raise exceptions.CertificateRetrievalException(ref=bad_refs)
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def _validate_create_listener(self, lock_session, listener_dict):
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"""Validate listener for wrong protocol or duplicate listeners
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Update the load balancer db when provisioning status changes.
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"""
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if (listener_dict and
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listener_dict.get('insert_headers') and
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list(set(listener_dict['insert_headers'].keys()) -
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set(constants.SUPPORTED_HTTP_HEADERS))):
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raise exceptions.InvalidOption(
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value=listener_dict.get('insert_headers'),
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option='insert_headers')
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try:
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sni_containers = listener_dict.pop('sni_containers', [])
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tls_refs = [sni['tls_container_id'] for sni in sni_containers]
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if listener_dict.get('tls_certificate_id'):
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tls_refs.append(listener_dict.get('tls_certificate_id'))
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self._validate_tls_refs(tls_refs)
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db_listener = self.repositories.listener.create(
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lock_session, **listener_dict)
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if sni_containers:
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for container in sni_containers:
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sni_dict = {'listener_id': db_listener.id,
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'tls_container_id': container.get(
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'tls_container_id')}
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self.repositories.sni.create(lock_session, **sni_dict)
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db_listener = self.repositories.listener.get(
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lock_session, id=db_listener.id)
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return db_listener
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except odb_exceptions.DBDuplicateEntry as de:
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column_list = ['load_balancer_id', 'protocol_port']
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constraint_list = ['uq_listener_load_balancer_id_protocol_port']
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if ['id'] == de.columns:
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raise exceptions.IDAlreadyExists()
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elif (set(column_list) == set(de.columns) or
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set(constraint_list) == set(de.columns)):
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raise exceptions.DuplicateListenerEntry(
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port=listener_dict.get('protocol_port'))
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except odb_exceptions.DBError:
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raise exceptions.InvalidOption(value=listener_dict.get('protocol'),
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option='protocol')
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def _send_listener_to_handler(self, session, db_listener):
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try:
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LOG.info("Sending Creation of Listener %s to handler",
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db_listener.id)
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self.handler.create(db_listener)
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except Exception:
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with excutils.save_and_reraise_exception(
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reraise=False), db_api.get_lock_session() as lock_session:
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self._reset_lb_status(
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lock_session, lb_id=db_listener.load_balancer_id)
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# Listener now goes to ERROR
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self.repositories.listener.update(
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lock_session, db_listener.id,
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provisioning_status=constants.ERROR)
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db_listener = self._get_db_listener(session, db_listener.id)
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result = self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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return listener_types.ListenerRootResponse(listener=result)
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@wsme_pecan.wsexpose(listener_types.ListenerRootResponse,
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body=listener_types.ListenerRootPOST, status_code=201)
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def post(self, listener_):
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"""Creates a listener on a load balancer."""
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listener = listener_.listener
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context = pecan.request.context.get('octavia_context')
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load_balancer_id = listener.loadbalancer_id
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listener.project_id = self._get_lb_project_id(
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context.session, load_balancer_id)
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self._auth_validate_action(context, listener.project_id,
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constants.RBAC_POST)
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if (not CONF.api_settings.allow_tls_terminated_listeners and
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listener.protocol == constants.PROTOCOL_TERMINATED_HTTPS):
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raise exceptions.DisabledOption(
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value=constants.PROTOCOL_TERMINATED_HTTPS, option='protocol')
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lock_session = db_api.get_session(autocommit=False)
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try:
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if self.repositories.check_quota_met(
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context.session,
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lock_session,
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data_models.Listener,
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listener.project_id):
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raise exceptions.QuotaException(
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resource=data_models.Listener._name())
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listener_dict = db_prepare.create_listener(
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listener.to_dict(render_unsets=True), None)
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if listener_dict['default_pool_id']:
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self._validate_pool(context.session, load_balancer_id,
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listener_dict['default_pool_id'],
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listener.protocol)
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self._test_lb_and_listener_statuses(
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lock_session, lb_id=load_balancer_id)
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db_listener = self._validate_create_listener(
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lock_session, listener_dict)
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lock_session.commit()
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except Exception:
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with excutils.save_and_reraise_exception():
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lock_session.rollback()
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return self._send_listener_to_handler(context.session, db_listener)
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def _graph_create(self, lock_session, listener_dict,
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l7policies=None, pool_name_ids=None):
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load_balancer_id = listener_dict['load_balancer_id']
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listener_dict = db_prepare.create_listener(
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listener_dict, load_balancer_id)
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l7policies = listener_dict.pop('l7policies', l7policies)
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if listener_dict.get('default_pool_id'):
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self._validate_pool(lock_session, load_balancer_id,
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listener_dict['default_pool_id'],
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listener_dict['protocol'])
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db_listener = self._validate_create_listener(
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lock_session, listener_dict)
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# Now create l7policies
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new_l7ps = []
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for l7p in l7policies:
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l7p['project_id'] = db_listener.project_id
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l7p['load_balancer_id'] = load_balancer_id
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l7p['listener_id'] = db_listener.id
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redirect_pool = l7p.pop('redirect_pool', None)
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if redirect_pool:
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pool_name = redirect_pool['name']
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pool_id = pool_name_ids.get(pool_name)
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if not pool_id:
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raise exceptions.SingleCreateDetailsMissing(
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type='Pool', name=pool_name)
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l7p['redirect_pool_id'] = pool_id
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new_l7ps.append(l7policy.L7PolicyController()._graph_create(
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lock_session, l7p))
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return db_listener, new_l7ps
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def _set_default_on_none(self, listener):
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"""Reset settings to their default values if None/null was passed in
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A None/null value can be passed in to clear a value. PUT values
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that were not provided by the user have a type of wtypes.UnsetType.
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If the user is attempting to clear values, they should either
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be set to None (for example in the name field) or they should be
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reset to their default values.
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This method is intended to handle those values that need to be set
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back to a default value.
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"""
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if listener.connection_limit is None:
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listener.connection_limit = constants.DEFAULT_CONNECTION_LIMIT
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@wsme_pecan.wsexpose(listener_types.ListenerRootResponse, wtypes.text,
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body=listener_types.ListenerRootPUT, status_code=200)
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def put(self, id, listener_):
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"""Updates a listener on a load balancer."""
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listener = listener_.listener
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context = pecan.request.context.get('octavia_context')
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db_listener = self._get_db_listener(context.session, id)
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load_balancer_id = db_listener.load_balancer_id
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self._auth_validate_action(context, db_listener.project_id,
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constants.RBAC_PUT)
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# TODO(rm_work): Do we need something like this? What do we do on an
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# empty body for a PUT?
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if not listener:
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raise exceptions.ValidationException(
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detail='No listener object supplied.')
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self._set_default_on_none(listener)
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if listener.default_pool_id:
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self._validate_pool(context.session, load_balancer_id,
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listener.default_pool_id, db_listener.protocol)
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self._test_lb_and_listener_statuses(context.session, load_balancer_id,
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id=id)
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sni_containers = listener.sni_container_refs or []
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tls_refs = [sni for sni in sni_containers]
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if listener.default_tls_container_ref:
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tls_refs.append(listener.default_tls_container_ref)
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self._validate_tls_refs(tls_refs)
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try:
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LOG.info("Sending Update of Listener %s to handler", id)
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self.handler.update(db_listener, listener)
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except Exception:
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with excutils.save_and_reraise_exception(
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reraise=False), db_api.get_lock_session() as lock_session:
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self._reset_lb_status(
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lock_session, lb_id=db_listener.load_balancer_id)
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# Listener now goes to ERROR
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self.repositories.listener.update(
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lock_session, db_listener.id,
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provisioning_status=constants.ERROR)
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db_listener = self._get_db_listener(context.session, id)
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result = self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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return listener_types.ListenerRootResponse(listener=result)
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@wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
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def delete(self, id):
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"""Deletes a listener from a load balancer."""
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context = pecan.request.context.get('octavia_context')
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db_listener = self._get_db_listener(context.session, id)
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load_balancer_id = db_listener.load_balancer_id
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self._auth_validate_action(context, db_listener.project_id,
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constants.RBAC_DELETE)
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if db_listener.provisioning_status == constants.DELETED:
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return
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self._test_lb_and_listener_statuses(
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context.session, load_balancer_id,
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id=id, listener_status=constants.PENDING_DELETE)
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try:
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LOG.info("Sending Deletion of Listener %s to handler",
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db_listener.id)
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self.handler.delete(db_listener)
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except Exception:
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with excutils.save_and_reraise_exception(
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reraise=False), db_api.get_lock_session() as lock_session:
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self._reset_lb_status(
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lock_session, lb_id=db_listener.load_balancer_id)
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# Listener now goes to ERROR
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self.repositories.listener.update(
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lock_session, db_listener.id,
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provisioning_status=constants.ERROR)
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@pecan.expose()
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def _lookup(self, id, *remainder):
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"""Overridden pecan _lookup method for custom routing.
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Currently it checks if this was a stats request and routes
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the request to the StatsController.
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"""
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if id and len(remainder) and remainder[0] == 'stats':
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return StatisticsController(listener_id=id), remainder[1:]
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class StatisticsController(base.BaseController, stats.StatsMixin):
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RBAC_TYPE = constants.RBAC_LISTENER
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def __init__(self, listener_id):
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super(StatisticsController, self).__init__()
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self.id = listener_id
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@wsme_pecan.wsexpose(listener_types.StatisticsRootResponse, wtypes.text,
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status_code=200)
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def get(self):
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context = pecan.request.context.get('octavia_context')
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db_listener = self._get_db_listener(context.session, self.id)
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if not db_listener:
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LOG.info("Listener %s not found.", id)
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raise exceptions.NotFound(
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resource=data_models.Listener._name(),
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id=id)
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self._auth_validate_action(context, db_listener.project_id,
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constants.RBAC_GET_STATS)
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listener_stats = self.get_listener_stats(context.session, self.id)
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result = self._convert_db_to_type(
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listener_stats, listener_types.ListenerStatisticsResponse)
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return listener_types.StatisticsRootResponse(stats=result)
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