octavia.api.v2.controllers.member

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

#    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_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 member as member_types
from octavia.common import constants
from octavia.common import data_models
from octavia.common import exceptions
import octavia.common.validate as validate
from octavia.db import api as db_api
from octavia.db import prepare as db_prepare


LOG = logging.getLogger(__name__)


[docs]class MembersController(base.BaseController): RBAC_TYPE = constants.RBAC_MEMBER def __init__(self, pool_id): super(MembersController, self).__init__() self.pool_id = pool_id self.handler = self.handler.member
[docs] @wsme_pecan.wsexpose(member_types.MemberRootResponse, wtypes.text) def get(self, id): """Gets a single pool member's details.""" context = pecan.request.context.get('octavia_context') db_member = self._get_db_member(context.session, id) self._auth_validate_action(context, db_member.project_id, constants.RBAC_GET_ONE) result = self._convert_db_to_type(db_member, member_types.MemberResponse) return member_types.MemberRootResponse(member=result)
[docs] @wsme_pecan.wsexpose(member_types.MembersRootResponse, wtypes.text, [wtypes.text], ignore_extra_args=True) def get_all(self, fields=None): """Lists all pool members of a pool.""" pcontext = pecan.request.context context = pcontext.get('octavia_context') pool = self._get_db_pool(context.session, self.pool_id) self._auth_validate_action(context, pool.project_id, constants.RBAC_GET_ALL) db_members, links = self.repositories.member.get_all( context.session, show_deleted=False, pool_id=self.pool_id, pagination_helper=pcontext.get(constants.PAGINATION_HELPER)) result = self._convert_db_to_type( db_members, [member_types.MemberResponse]) if fields is not None: result = self._filter_fields(result, fields) return member_types.MembersRootResponse( members=result, members_links=links)
def _get_affected_listener_ids(self, session, member=None): """Gets a list of all listeners this request potentially affects.""" if member: listener_ids = [l.id for l in member.pool.listeners] else: pool = self._get_db_pool(session, self.pool_id) listener_ids = [l.id for l in pool.listeners] return listener_ids def _test_lb_and_listener_and_pool_statuses(self, session, member=None): """Verify load balancer is in a mutable state.""" # We need to verify that any listeners referencing this member's # pool are also mutable pool = self._get_db_pool(session, self.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, member), pool_id=self.pool_id): LOG.info("Member 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, member=None): # Setting LB + listener + pool back to active because this should be a # recoverable error pool = self._get_db_pool(session, self.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, member): self.repositories.listener.update( session, listener, provisioning_status=constants.ACTIVE) self.repositories.pool.update(session, self.pool_id, provisioning_status=constants.ACTIVE) def _validate_create_member(self, lock_session, member_dict): """Validate creating member on pool.""" try: return self.repositories.member.create(lock_session, **member_dict) except odb_exceptions.DBDuplicateEntry as de: column_list = ['pool_id', 'ip_address', 'protocol_port'] constraint_list = ['uq_member_pool_id_address_protocol_port'] if ['id'] == de.columns: raise exceptions.IDAlreadyExists() elif (set(column_list) == set(de.columns) or set(constraint_list) == set(de.columns)): raise exceptions.DuplicateMemberEntry( ip_address=member_dict.get('ip_address'), port=member_dict.get('protocol_port')) 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_member_to_handler(self, session, db_member): try: LOG.info("Sending Creation of Pool %s to handler", db_member.id) self.handler.create(db_member) 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, member=db_member) # Member now goes to ERROR self.repositories.member.update( lock_session, db_member.id, provisioning_status=constants.ERROR) db_member = self._get_db_member(session, db_member.id) result = self._convert_db_to_type(db_member, member_types.MemberResponse) return member_types.MemberRootResponse(member=result)
[docs] @wsme_pecan.wsexpose(member_types.MemberRootResponse, body=member_types.MemberRootPOST, status_code=201) def post(self, member_): """Creates a pool member on a pool.""" member = member_.member context = pecan.request.context.get('octavia_context') # Validate member subnet if member.subnet_id and not validate.subnet_exists(member.subnet_id): raise exceptions.NotFound(resource='Subnet', id=member.subnet_id) pool = self.repositories.pool.get(context.session, id=self.pool_id) member.project_id = self._get_lb_project_id(context.session, pool.load_balancer_id) self._auth_validate_action(context, member.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.Member, member.project_id): lock_session.rollback() raise exceptions.QuotaException member_dict = db_prepare.create_member(member.to_dict( render_unsets=True), self.pool_id, bool(pool.health_monitor)) try: self._test_lb_and_listener_and_pool_statuses(lock_session) db_member = self._validate_create_member(lock_session, member_dict) lock_session.commit() except Exception: with excutils.save_and_reraise_exception(): lock_session.rollback() return self._send_member_to_handler(context.session, db_member)
def _graph_create(self, lock_session, member_dict): pool = self.repositories.pool.get(lock_session, id=self.pool_id) member_dict = db_prepare.create_member( member_dict, self.pool_id, bool(pool.health_monitor)) db_member = self._validate_create_member(lock_session, member_dict) return db_member
[docs] @wsme_pecan.wsexpose(member_types.MemberRootResponse, wtypes.text, body=member_types.MemberRootPUT, status_code=200) def put(self, id, member_): """Updates a pool member.""" member = member_.member context = pecan.request.context.get('octavia_context') db_member = self._get_db_member(context.session, id) self._auth_validate_action(context, db_member.project_id, constants.RBAC_PUT) self._test_lb_and_listener_and_pool_statuses(context.session, member=db_member) self.repositories.member.update( context.session, db_member.id, provisioning_status=constants.PENDING_UPDATE) try: LOG.info("Sending Update of Member %s to handler", id) self.handler.update(db_member, member) 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, member=db_member) # Member now goes to ERROR self.repositories.member.update( lock_session, db_member.id, provisioning_status=constants.ERROR) db_member = self._get_db_member(context.session, id) result = self._convert_db_to_type(db_member, member_types.MemberResponse) return member_types.MemberRootResponse(member=result)
[docs] @wsme_pecan.wsexpose(None, wtypes.text, status_code=204) def delete(self, id): """Deletes a pool member.""" context = pecan.request.context.get('octavia_context') db_member = self._get_db_member(context.session, id) self._auth_validate_action(context, db_member.project_id, constants.RBAC_DELETE) self._test_lb_and_listener_and_pool_statuses(context.session, member=db_member) self.repositories.member.update( context.session, db_member.id, provisioning_status=constants.PENDING_DELETE) try: LOG.info("Sending Deletion of Member %s to handler", db_member.id) self.handler.delete(db_member) 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, member=db_member) # Member now goes to ERROR self.repositories.member.update( lock_session, db_member.id, provisioning_status=constants.ERROR)
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