249 lines
11 KiB
Python
249 lines
11 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 health_monitor as hm_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 HealthMonitorController(base.BaseController):
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def __init__(self):
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super(HealthMonitorController, self).__init__()
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self.handler = self.handler.health_monitor
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def _get_db_hm(self, session, hm_id):
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"""Gets the current health monitor object from the database."""
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db_hm = self.repositories.health_monitor.get(
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session, id=hm_id)
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if not db_hm:
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LOG.info("Health Monitor %s was not found", hm_id)
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raise exceptions.NotFound(
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resource=data_models.HealthMonitor._name(),
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id=hm_id)
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return db_hm
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@wsme_pecan.wsexpose(hm_types.HealthMonitorRootResponse, wtypes.text,
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wtypes.text)
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def get_one(self, id):
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"""Gets a single healthmonitor's details."""
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context = pecan.request.context.get('octavia_context')
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db_hm = self._get_db_hm(context.session, id)
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result = self._convert_db_to_type(
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db_hm, hm_types.HealthMonitorResponse)
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return hm_types.HealthMonitorRootResponse(healthmonitor=result)
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@wsme_pecan.wsexpose(hm_types.HealthMonitorsRootResponse, wtypes.text)
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def get_all(self, project_id=None):
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"""Gets all health monitors."""
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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:
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project_id = {'project_id': project_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_hm = self.repositories.health_monitor.get_all(
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context.session, show_deleted=False, **project_id)
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result = self._convert_db_to_type(
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db_hm, [hm_types.HealthMonitorResponse])
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return hm_types.HealthMonitorsRootResponse(healthmonitors=result)
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def _get_affected_listener_ids(self, session, hm):
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"""Gets a list of all listeners this request potentially affects."""
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pool = self.repositories.pool.get(session, id=hm.pool_id)
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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_and_pool_statuses(self, session, hm):
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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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pool = self.repositories.pool.get(session, id=hm.pool_id)
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load_balancer_id = pool.load_balancer_id
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if not self.repositories.test_and_set_lb_and_listeners_prov_status(
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session, load_balancer_id,
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constants.PENDING_UPDATE, constants.PENDING_UPDATE,
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listener_ids=self._get_affected_listener_ids(session, hm),
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pool_id=hm.pool_id):
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LOG.info("Health Monitor cannot be created or modified because "
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"the Load Balancer is in an immutable state")
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raise exceptions.ImmutableObject(resource='Load Balancer',
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id=load_balancer_id)
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def _reset_lb_listener_pool_statuses(self, session, hm):
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# Setting LB + listener + pool back to active because this should be a
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# recoverable error
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pool = self._get_db_pool(session, hm.pool_id)
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load_balancer_id = pool.load_balancer_id
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self.repositories.load_balancer.update(
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session, load_balancer_id,
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provisioning_status=constants.ACTIVE)
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for listener in self._get_affected_listener_ids(session, hm):
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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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self.repositories.pool.update(session, hm.pool_id,
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provisioning_status=constants.ACTIVE)
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def _validate_create_hm(self, lock_session, hm_dict):
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"""Validate creating health monitor on pool."""
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try:
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return self.repositories.health_monitor.create(
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lock_session, **hm_dict)
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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_hm_to_handler(self, session, db_hm):
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try:
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LOG.info("Sending Creation of Health Monitor %s to handler",
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db_hm.id)
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self.handler.create(db_hm)
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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_listener_pool_statuses(
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lock_session, db_hm)
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# Health Monitor now goes to ERROR
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self.repositories.health_monitor.update(
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lock_session, db_hm.id,
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provisioning_status=constants.ERROR)
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db_hm = self._get_db_hm(session, db_hm.id)
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result = self._convert_db_to_type(
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db_hm, hm_types.HealthMonitorResponse)
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return hm_types.HealthMonitorRootResponse(healthmonitor=result)
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@wsme_pecan.wsexpose(hm_types.HealthMonitorRootResponse,
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body=hm_types.HealthMonitorRootPOST, status_code=201)
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def post(self, health_monitor_):
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"""Creates a health monitor on a pool."""
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context = pecan.request.context.get('octavia_context')
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health_monitor = health_monitor_.healthmonitor
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pool = self._get_db_pool(context.session, health_monitor.pool_id)
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health_monitor.project_id = pool.project_id
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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.HealthMonitor,
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health_monitor.project_id):
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lock_session.rollback()
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raise exceptions.QuotaException
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hm_dict = db_prepare.create_health_monitor(
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health_monitor.to_dict(render_unsets=True))
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try:
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self._test_lb_and_listener_and_pool_statuses(
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lock_session, health_monitor)
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db_hm = self._validate_create_hm(lock_session, hm_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_hm_to_handler(context.session, db_hm)
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def _graph_create(self, lock_session, hm_dict):
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hm_dict = db_prepare.create_health_monitor(hm_dict)
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db_hm = self._validate_create_hm(lock_session, hm_dict)
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return db_hm
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@wsme_pecan.wsexpose(hm_types.HealthMonitorRootResponse, wtypes.text,
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body=hm_types.HealthMonitorRootPUT, status_code=200)
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def put(self, id, health_monitor_):
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"""Updates a health monitor."""
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context = pecan.request.context.get('octavia_context')
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health_monitor = health_monitor_.healthmonitor
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db_hm = self._get_db_hm(context.session, id)
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self._test_lb_and_listener_and_pool_statuses(context.session, db_hm)
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self.repositories.health_monitor.update(
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context.session, db_hm.id,
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provisioning_status=constants.PENDING_UPDATE)
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try:
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LOG.info("Sending Update of Health Monitor for Pool %s to "
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"handler", id)
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self.handler.update(db_hm, health_monitor)
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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_listener_pool_statuses(
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lock_session, db_hm)
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# Health Monitor now goes to ERROR
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self.repositories.health_monitor.update(
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lock_session, db_hm.id,
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provisioning_status=constants.ERROR)
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db_hm = self._get_db_hm(context.session, id)
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result = self._convert_db_to_type(
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db_hm, hm_types.HealthMonitorResponse)
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return hm_types.HealthMonitorRootResponse(healthmonitor=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 health monitor."""
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context = pecan.request.context.get('octavia_context')
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db_hm = self._get_db_hm(context.session, id)
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self._test_lb_and_listener_and_pool_statuses(context.session, db_hm)
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self.repositories.health_monitor.update(
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context.session, db_hm.id,
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provisioning_status=constants.PENDING_DELETE)
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try:
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LOG.info("Sending Deletion of Health Monitor for Pool %s to "
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"handler", id)
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self.handler.delete(db_hm)
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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_listener_pool_statuses(
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lock_session, db_hm)
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# Health Monitor now goes to ERROR
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self.repositories.health_monitor.update(
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lock_session, db_hm.id,
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provisioning_status=constants.ERROR)
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db_hm = self.repositories.health_monitor.get(
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context.session, id=id)
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result = self._convert_db_to_type(
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db_hm, hm_types.HealthMonitorResponse)
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return hm_types.HealthMonitorRootResponse(healthmonitor=result)
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