279 lines
12 KiB
Python
279 lines
12 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_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.v1.controllers import health_monitor
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from octavia.api.v1.controllers import member
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from octavia.api.v2.controllers import base
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from octavia.api.v2.types import pool as pool_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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from octavia.i18n import _LI
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LOG = logging.getLogger(__name__)
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class PoolsController(base.BaseController):
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def __init__(self):
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super(PoolsController, self).__init__()
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self.handler = self.handler.pool
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@wsme_pecan.wsexpose(pool_types.PoolRootResponse, wtypes.text)
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def get(self, id):
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"""Gets a pool's details."""
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context = pecan.request.context.get('octavia_context')
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db_pool = self._get_db_pool(context.session, id)
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result = self._convert_db_to_type(db_pool, pool_types.PoolResponse)
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return pool_types.PoolRootResponse(pool=result)
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@wsme_pecan.wsexpose(pool_types.PoolsRootResponse, wtypes.text)
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def get_all(self):
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"""Lists all pools."""
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context = pecan.request.context.get('octavia_context')
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pools = self.repositories.pool.get_all(context.session)
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result = self._convert_db_to_type(pools, [pool_types.PoolResponse])
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return pool_types.PoolsRootResponse(pools=result)
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def _get_affected_listener_ids(self, pool):
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"""Gets a list of all listeners this request potentially affects."""
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listener_ids = [l.id for l in pool.listeners]
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return listener_ids
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def _test_lb_and_listener_statuses(self, session, lb_id, listener_ids):
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"""Verify load balancer is in a mutable state."""
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# We need to verify that any listeners referencing this pool are also
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# mutable
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if not self.repositories.test_and_set_lb_and_listeners_prov_status(
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session, lb_id,
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constants.PENDING_UPDATE, constants.PENDING_UPDATE,
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listener_ids=listener_ids):
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LOG.info(_LI("Pool cannot be created or modified because the Load "
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"Balancer is in an immutable state"))
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raise exceptions.ImmutableObject(resource=_('Load Balancer'),
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id=lb_id)
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def _reset_lb_and_listener_statuses(self, session, lb_id, listener_ids):
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# Setting LB + listeners back to active because this should be a
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# 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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for listener in listener_ids:
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self.repositories.listener.update(
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session, listener,
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provisioning_status=constants.ACTIVE)
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def _validate_create_pool(self, lock_session, pool_dict, listener_id=None):
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"""Validate creating pool on load balancer.
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Update database for load balancer and (optional) listener based on
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provisioning status.
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"""
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try:
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return self.repositories.create_pool_on_load_balancer(
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lock_session, pool_dict,
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listener_id=listener_id)
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except odb_exceptions.DBDuplicateEntry as de:
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if ['id'] == de.columns:
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raise exceptions.IDAlreadyExists()
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except odb_exceptions.DBError:
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# TODO(blogan): will have to do separate validation protocol
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# before creation or update since the exception messages
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# do not give any information as to what constraint failed
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raise exceptions.InvalidOption(value='', option='')
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def _send_pool_to_handler(self, session, db_pool, listener_id):
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try:
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LOG.info(_LI("Sending Creation of Pool %s to handler"),
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db_pool.id)
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self.handler.create(db_pool)
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except Exception:
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with (excutils.save_and_reraise_exception(reraise=False) and
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db_api.get_lock_session()):
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self._reset_lb_and_listener_statuses(
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session, lb_id=db_pool.load_balancer_id,
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listener_ids=[listener_id] if listener_id else [])
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# Pool now goes to ERROR
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self.repositories.pool.update(
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session, db_pool.id,
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provisioning_status=constants.ERROR)
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db_pool = self._get_db_pool(session, db_pool.id)
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result = self._convert_db_to_type(db_pool, pool_types.PoolResponse)
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return pool_types.PoolRootResponse(pool=result)
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@wsme_pecan.wsexpose(pool_types.PoolRootResponse,
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body=pool_types.PoolRootPOST, status_code=201)
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def post(self, pool_):
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"""Creates a pool on a load balancer or listener.
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Note that this can optionally take a listener_id with which the pool
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should be associated as the listener's default_pool. If specified,
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the pool creation will fail if the listener specified already has
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a default_pool.
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"""
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# For some API requests the listener_id will be passed in the
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# pool_dict:
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pool = pool_.pool
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context = pecan.request.context.get('octavia_context')
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if pool.loadbalancer_id:
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pool.project_id = self._get_lb_project_id(context.session,
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pool.loadbalancer_id)
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elif pool.listener_id:
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listener = self.repositories.listener.get(
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context.session, id=pool.listener_id)
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pool.project_id = listener.project_id
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pool.loadbalancer_id = listener.load_balancer_id
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else:
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msg = _("Must provide at least one of: "
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"loadbalancer_id, listener_id")
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raise exceptions.ValidationException(details=msg)
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lock_session = db_api.get_session(autocommit=False)
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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.Pool,
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pool.project_id):
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lock_session.rollback()
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raise exceptions.QuotaException
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listener_repo = self.repositories.listener
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pool_dict = db_prepare.create_pool(
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pool.to_dict(render_unsets=True))
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listener_id = pool_dict.pop('listener_id', None)
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if listener_id:
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if listener_repo.has_default_pool(lock_session,
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listener_id):
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raise exceptions.DuplicatePoolEntry()
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try:
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self._test_lb_and_listener_statuses(
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lock_session, lb_id=pool_dict['load_balancer_id'],
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listener_ids=[listener_id] if listener_id else [])
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db_pool = self._validate_create_pool(
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lock_session, pool_dict, listener_id)
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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_pool_to_handler(context.session, db_pool,
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listener_id=listener_id)
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@wsme_pecan.wsexpose(pool_types.PoolRootResponse, wtypes.text,
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body=pool_types.PoolRootPut, status_code=200)
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def put(self, id, pool_):
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"""Updates a pool on a load balancer."""
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pool = pool_.pool
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context = pecan.request.context.get('octavia_context')
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db_pool = self._get_db_pool(context.session, id)
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self._test_lb_and_listener_statuses(
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context.session, lb_id=db_pool.load_balancer_id,
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listener_ids=self._get_affected_listener_ids(db_pool))
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self.repositories.pool.update(
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context.session, db_pool.id,
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provisioning_status=constants.PENDING_UPDATE)
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try:
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LOG.info(_LI("Sending Update of Pool %s to handler"), id)
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self.handler.update(db_pool, pool)
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except Exception:
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with (excutils.save_and_reraise_exception(reraise=False) and
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db_api.get_lock_session()):
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self._reset_lb_and_listener_statuses(
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context.session, lb_id=db_pool.load_balancer_id,
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listener_ids=self._get_affected_listener_ids(db_pool))
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# Pool now goes to ERROR
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self.repositories.pool.update(
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context.session, db_pool.id,
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provisioning_status=constants.ERROR)
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db_pool = self._get_db_pool(context.session, id)
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result = self._convert_db_to_type(db_pool, pool_types.PoolResponse)
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return pool_types.PoolRootResponse(pool=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 pool from a load balancer."""
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context = pecan.request.context.get('octavia_context')
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db_pool = self._get_db_pool(context.session, id)
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if len(db_pool.l7policies) > 0:
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raise exceptions.PoolInUseByL7Policy(
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id=db_pool.id, l7policy_id=db_pool.l7policies[0].id)
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self._test_lb_and_listener_statuses(
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context.session, lb_id=db_pool.load_balancer_id,
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listener_ids=self._get_affected_listener_ids(db_pool))
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self.repositories.pool.update(
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context.session, db_pool.id,
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provisioning_status=constants.PENDING_DELETE)
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try:
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LOG.info(_LI("Sending Deletion of Pool %s to handler"),
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db_pool.id)
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self.handler.delete(db_pool)
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except Exception:
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with (excutils.save_and_reraise_exception(reraise=False) and
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db_api.get_lock_session()):
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self._reset_lb_and_listener_statuses(
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context.session, lb_id=db_pool.load_balancer_id,
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listener_ids=self._get_affected_listener_ids(db_pool))
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# Pool now goes to ERROR
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self.repositories.pool.update(
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context.session, db_pool.id,
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provisioning_status=constants.ERROR)
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db_pool = self.repositories.pool.get(context.session, id=db_pool.id)
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result = self._convert_db_to_type(db_pool, pool_types.PoolResponse)
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return pool_types.PoolRootResponse(pool=result)
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@pecan.expose()
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def _lookup(self, pool_id, *remainder):
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"""Overridden pecan _lookup method for custom routing.
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Verifies that the pool passed in the url exists, and if so decides
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which controller, if any, should control be passed.
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"""
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context = pecan.request.context.get('octavia_context')
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if pool_id and len(remainder) and (remainder[0] == 'members' or
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remainder[0] == 'healthmonitor'):
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controller = remainder[0]
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remainder = remainder[1:]
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db_pool = self.repositories.pool.get(context.session, id=pool_id)
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if not db_pool:
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LOG.info(_LI("Pool %s not found."), pool_id)
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raise exceptions.NotFound(resource=data_models.Pool._name(),
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id=pool_id)
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if controller == 'members':
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return member.MembersController(
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load_balancer_id=db_pool.load_balancer_id,
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pool_id=db_pool.id), remainder
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elif controller == 'healthmonitor':
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return health_monitor.HealthMonitorController(
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load_balancer_id=db_pool.load_balancer_id,
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pool_id=db_pool.id), remainder
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