octavia.api.v2.controllers.health_monitor

Source code for octavia.api.v2.controllers.health_monitor

#    Copyright 2014 Rackspace
#    Copyright 2016 Blue Box, an IBM Company
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import logging

from oslo_config import cfg
from oslo_db import exception as odb_exceptions
from oslo_utils import excutils
import pecan
from wsme import types as wtypes
from wsmeext import pecan as wsme_pecan

from octavia.api.v2.controllers import base
from octavia.api.v2.types import health_monitor as hm_types
from octavia.common import constants
from octavia.common import data_models
from octavia.common import exceptions
from octavia.db import api as db_api
from octavia.db import prepare as db_prepare


CONF = cfg.CONF
LOG = logging.getLogger(__name__)


[docs]class HealthMonitorController(base.BaseController): RBAC_TYPE = constants.RBAC_HEALTHMONITOR def __init__(self): super(HealthMonitorController, self).__init__() self.handler = self.handler.health_monitor def _get_db_hm(self, session, hm_id): """Gets the current health monitor object from the database.""" db_hm = self.repositories.health_monitor.get( session, id=hm_id) if not db_hm: LOG.info("Health Monitor %s was not found", hm_id) raise exceptions.NotFound( resource=data_models.HealthMonitor._name(), id=hm_id) return db_hm
[docs] @wsme_pecan.wsexpose(hm_types.HealthMonitorRootResponse, wtypes.text, wtypes.text) def get_one(self, id): """Gets a single healthmonitor's details.""" context = pecan.request.context.get('octavia_context') db_hm = self._get_db_hm(context.session, id) self._auth_validate_action(context, db_hm.project_id, constants.RBAC_GET_ONE) result = self._convert_db_to_type( db_hm, hm_types.HealthMonitorResponse) return hm_types.HealthMonitorRootResponse(healthmonitor=result)
[docs] @wsme_pecan.wsexpose(hm_types.HealthMonitorsRootResponse, wtypes.text, [wtypes.text], ignore_extra_args=True) def get_all(self, project_id=None, fields=None): """Gets all health monitors.""" pcontext = pecan.request.context context = pcontext.get('octavia_context') query_filter = self._auth_get_all(context, project_id) db_hm, links = self.repositories.health_monitor.get_all( context.session, show_deleted=False, pagination_helper=pcontext.get(constants.PAGINATION_HELPER), **query_filter) result = self._convert_db_to_type( db_hm, [hm_types.HealthMonitorResponse]) if fields is not None: result = self._filter_fields(result, fields) return hm_types.HealthMonitorsRootResponse( healthmonitors=result, healthmonitors_links=links)
def _get_affected_listener_ids(self, session, hm): """Gets a list of all listeners this request potentially affects.""" pool = self.repositories.pool.get(session, id=hm.pool_id) listener_ids = [l.id for l in pool.listeners] return listener_ids def _test_lb_and_listener_and_pool_statuses(self, session, hm): """Verify load balancer is in a mutable state.""" # We need to verify that any listeners referencing this pool are also # mutable pool = self.repositories.pool.get(session, id=hm.pool_id) load_balancer_id = pool.load_balancer_id if not self.repositories.test_and_set_lb_and_listeners_prov_status( session, load_balancer_id, constants.PENDING_UPDATE, constants.PENDING_UPDATE, listener_ids=self._get_affected_listener_ids(session, hm), pool_id=hm.pool_id): LOG.info("Health Monitor cannot be created or modified because " "the Load Balancer is in an immutable state") raise exceptions.ImmutableObject(resource='Load Balancer', id=load_balancer_id) def _reset_lb_listener_pool_statuses(self, session, hm): # Setting LB + listener + pool back to active because this should be a # recoverable error pool = self._get_db_pool(session, hm.pool_id) load_balancer_id = pool.load_balancer_id self.repositories.load_balancer.update( session, load_balancer_id, provisioning_status=constants.ACTIVE) for listener in self._get_affected_listener_ids(session, hm): self.repositories.listener.update( session, listener, provisioning_status=constants.ACTIVE) self.repositories.pool.update(session, hm.pool_id, provisioning_status=constants.ACTIVE) def _validate_create_hm(self, lock_session, hm_dict): """Validate creating health monitor on pool.""" try: return self.repositories.health_monitor.create( lock_session, **hm_dict) except odb_exceptions.DBDuplicateEntry as de: if ['id'] == de.columns: raise exceptions.IDAlreadyExists() except odb_exceptions.DBError: # TODO(blogan): will have to do separate validation protocol # before creation or update since the exception messages # do not give any information as to what constraint failed raise exceptions.InvalidOption(value='', option='') def _send_hm_to_handler(self, session, db_hm): try: LOG.info("Sending Creation of Health Monitor %s to handler", db_hm.id) self.handler.create(db_hm) except Exception: with excutils.save_and_reraise_exception( reraise=False), db_api.get_lock_session() as lock_session: self._reset_lb_listener_pool_statuses( lock_session, db_hm) # Health Monitor now goes to ERROR self.repositories.health_monitor.update( lock_session, db_hm.id, provisioning_status=constants.ERROR) db_hm = self._get_db_hm(session, db_hm.id) result = self._convert_db_to_type( db_hm, hm_types.HealthMonitorResponse) return hm_types.HealthMonitorRootResponse(healthmonitor=result)
[docs] @wsme_pecan.wsexpose(hm_types.HealthMonitorRootResponse, body=hm_types.HealthMonitorRootPOST, status_code=201) def post(self, health_monitor_): """Creates a health monitor on a pool.""" context = pecan.request.context.get('octavia_context') health_monitor = health_monitor_.healthmonitor pool = self._get_db_pool(context.session, health_monitor.pool_id) health_monitor.project_id = pool.project_id self._auth_validate_action(context, health_monitor.project_id, constants.RBAC_POST) lock_session = db_api.get_session(autocommit=False) if self.repositories.check_quota_met( context.session, lock_session, data_models.HealthMonitor, health_monitor.project_id): lock_session.rollback() raise exceptions.QuotaException hm_dict = db_prepare.create_health_monitor( health_monitor.to_dict(render_unsets=True)) try: self._test_lb_and_listener_and_pool_statuses( lock_session, health_monitor) db_hm = self._validate_create_hm(lock_session, hm_dict) lock_session.commit() except odb_exceptions.DBError: lock_session.rollback() raise exceptions.InvalidOption( value=hm_dict.get('type'), option='type') except Exception: with excutils.save_and_reraise_exception(): lock_session.rollback() return self._send_hm_to_handler(context.session, db_hm)
def _graph_create(self, lock_session, hm_dict): hm_dict = db_prepare.create_health_monitor(hm_dict) db_hm = self._validate_create_hm(lock_session, hm_dict) return db_hm
[docs] @wsme_pecan.wsexpose(hm_types.HealthMonitorRootResponse, wtypes.text, body=hm_types.HealthMonitorRootPUT, status_code=200) def put(self, id, health_monitor_): """Updates a health monitor.""" context = pecan.request.context.get('octavia_context') health_monitor = health_monitor_.healthmonitor db_hm = self._get_db_hm(context.session, id) self._auth_validate_action(context, db_hm.project_id, constants.RBAC_PUT) self._test_lb_and_listener_and_pool_statuses(context.session, db_hm) self.repositories.health_monitor.update( context.session, db_hm.id, provisioning_status=constants.PENDING_UPDATE) try: LOG.info("Sending Update of Health Monitor for Pool %s to " "handler", id) self.handler.update(db_hm, health_monitor) except Exception: with excutils.save_and_reraise_exception( reraise=False), db_api.get_lock_session() as lock_session: self._reset_lb_listener_pool_statuses( lock_session, db_hm) # Health Monitor now goes to ERROR self.repositories.health_monitor.update( lock_session, db_hm.id, provisioning_status=constants.ERROR) db_hm = self._get_db_hm(context.session, id) result = self._convert_db_to_type( db_hm, hm_types.HealthMonitorResponse) return hm_types.HealthMonitorRootResponse(healthmonitor=result)
[docs] @wsme_pecan.wsexpose(None, wtypes.text, status_code=204) def delete(self, id): """Deletes a health monitor.""" context = pecan.request.context.get('octavia_context') db_hm = self._get_db_hm(context.session, id) self._auth_validate_action(context, db_hm.project_id, constants.RBAC_DELETE) self._test_lb_and_listener_and_pool_statuses(context.session, db_hm) self.repositories.health_monitor.update( context.session, db_hm.id, provisioning_status=constants.PENDING_DELETE) try: LOG.info("Sending Deletion of Health Monitor for Pool %s to " "handler", id) self.handler.delete(db_hm) except Exception: with excutils.save_and_reraise_exception( reraise=False), db_api.get_lock_session() as lock_session: self._reset_lb_listener_pool_statuses( lock_session, db_hm) # Health Monitor now goes to ERROR self.repositories.health_monitor.update( lock_session, db_hm.id, provisioning_status=constants.ERROR)
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