275 lines
13 KiB
Python
275 lines
13 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 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.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.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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def __init__(self):
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super(ListenersController, self).__init__()
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self.handler = self.handler.listener
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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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def get_one(self, id):
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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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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.ListenersRootResponse,
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wtypes.text, wtypes.text)
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def get_all(self, tenant_id=None, project_id=None):
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"""Lists all listeners."""
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context = pecan.request.context.get('octavia_context')
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if context.is_admin or CONF.auth_strategy == constants.NOAUTH:
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if project_id or tenant_id:
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project_id = {'project_id': project_id or tenant_id}
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else:
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project_id = {}
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else:
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project_id = {'project_id': context.project_id}
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db_listeners = self.repositories.listener.get_all(
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context.session, **project_id)
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result = self._convert_db_to_type(db_listeners,
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[listener_types.ListenerResponse])
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return listener_types.ListenersRootResponse(listeners=result)
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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):
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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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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_listener(self, session, lb_id, 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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lb_repo = self.repositories.load_balancer
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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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db_listener = self.repositories.listener.create(
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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(session, **sni_dict)
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db_listener = self.repositories.listener.get(session,
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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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# Setting LB back to active because this is just a validation
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# failure
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lb_repo.update(session, lb_id,
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provisioning_status=constants.ACTIVE)
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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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# Setting LB back to active because this is just a validation
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# failure
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lb_repo.update(session, lb_id,
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provisioning_status=constants.ACTIVE)
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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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listener_dict = db_prepare.create_listener(
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listener.to_dict(render_unsets=True), None)
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load_balancer_id = listener_dict['load_balancer_id']
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listener_dict['project_id'] = self._get_lb_project_id(
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context.session, load_balancer_id)
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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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self._test_lb_and_listener_statuses(context.session, load_balancer_id)
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# This is the extra validation layer for wrong protocol or duplicate
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# listeners on the same load balancer.
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db_listener = self._validate_listener(
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context.session, load_balancer_id, listener_dict)
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return self._send_listener_to_handler(context.session, db_listener)
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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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# 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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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)
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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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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._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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db_listener = self.repositories.listener.get(
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context.session, id=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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