# 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.

    from octavia_lib.api.drivers import data_models as driver_dm
    from oslo_db import exception as odb_exceptions
    from oslo_log import log as logging
    from oslo_utils import excutils
    from oslo_utils import strutils
    from pecan import request as pecan_request
    from sqlalchemy.orm import exc as sa_exception
    from wsme import types as wtypes
    from wsmeext import pecan as wsme_pecan

    from octavia.api.drivers import driver_factory
    from octavia.api.drivers import utils as driver_utils
    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
    from octavia.common import validate
    from octavia.db import prepare as db_prepare
    from octavia.i18n import _

    LOG = logging.getLogger(__name__)

    class MemberController(base.BaseController):
        RBAC_TYPE = constants.RBAC_MEMBER

        def __init__(self, pool_id):
            super().__init__()
            self.pool_id = pool_id

        @wsme_pecan.wsexpose(member_types.MemberRootResponse, wtypes.text,
                             [wtypes.text], ignore_extra_args=True)
        def get(self, id, fields=None):
            """Gets a single pool member's details."""
            context = pecan_request.context.get('octavia_context')
            with context.session.begin():
                db_member = self._get_db_member(context.session, id,
                                                show_deleted=False)

            self._auth_validate_action(context, db_member.project_id,
                                       constants.RBAC_GET_ONE)

            self._validate_pool_id(id, db_member.pool_id)

            result = self._convert_db_to_type(
                db_member, member_types.MemberResponse)
            if fields is not None:
                result = self._filter_fields([result], fields)[0]
            return member_types.MemberRootResponse(member=result)

        @wsme_pecan.wsexpose(member_types.MembersRootResponse, [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')

            with context.session.begin():
                pool = self._get_db_pool(context.session, self.pool_id,
                                         show_deleted=False, limited_graph=True)

                self._auth_validate_action(context, pool.project_id,
                                           constants.RBAC_GET_ALL)

                db_members, links = self.repositories.member.get_all_API_list(
                    context.session, show_deleted=False,
                    pool_id=self.pool_id,
                    pagination_helper=pcontext.get(constants.PAGINATION_HELPER),
                    limited_graph=True)
            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 = [li.id for li in member.pool.listeners]
            else:
                pool = self._get_db_pool(session, self.pool_id)
                listener_ids = [li.id for li 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)
            # Check the parent is not locked for some reason (ERROR, etc.)
            if pool.provisioning_status not in constants.MUTABLE_STATUSES:
                raise exceptions.ImmutableObject(resource='Pool', id=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 _validate_create_member(self, lock_session, member_dict):
            """Validate creating member on pool."""
            try:
                ret = self.repositories.member.create(lock_session, **member_dict)
                lock_session.flush()
                return ret
            except odb_exceptions.DBDuplicateEntry as e:
                raise exceptions.DuplicateMemberEntry(
                    ip_address=member_dict.get('ip_address'),
                    port=member_dict.get('protocol_port')) from e
            except odb_exceptions.DBReferenceError as e:
                raise exceptions.InvalidOption(value=member_dict.get(e.key),
                                               option=e.key) from e
            except odb_exceptions.DBError as e:
                raise exceptions.APIException() from e
            return None

        def _validate_pool_id(self, member_id, db_member_pool_id):
            if db_member_pool_id != self.pool_id:
                raise exceptions.NotFound(resource='Member', id=member_id)

        @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')

            flavor_dict = {}
            with context.session.begin():
                pool = self.repositories.pool.get(context.session, id=self.pool_id)
                member.project_id, provider = self._get_lb_project_id_provider(
                    context.session, pool.load_balancer_id)
                if pool.load_balancer.flavor_id:
                    try:
                        flavor_dict = (
                            self.repositories.flavor.get_flavor_metadata_dict(
                                context.session, pool.load_balancer.flavor_id))
                    except sa_exception.NoResultFound:
                        LOG.error("load balancer has a flavor ID: %s that was not "
                                  "found in the database. Assuming no flavor.",
                                  pool.load_balancer.flavor_id)

            self._auth_validate_action(context, member.project_id,
                                       constants.RBAC_POST)

            validate.ip_not_reserved(member.address)

            # Validate member subnet
            if (member.subnet_id and
                    not validate.subnet_exists(member.subnet_id, context=context)):
                raise exceptions.NotFound(resource='Subnet', id=member.subnet_id)

            # Load the driver early as it also provides validation
            driver = driver_factory.get_driver(provider)

            context.session.begin()
            try:
                if self.repositories.check_quota_met(
                        context.session,
                        data_models.Member,
                        member.project_id):
                    raise exceptions.QuotaException(
                        resource=data_models.Member._name())

                db_member_dict = member.to_dict(render_unsets=True)

                # Validate and store port SR-IOV vnic_type
                request_sriov = db_member_dict.pop('request_sriov')
                if (request_sriov and not
                        flavor_dict.get(constants.ALLOW_MEMBER_SRIOV, False)):
                    raise exceptions.MemberSRIOVDisabled
                if request_sriov:
                    db_member_dict[constants.VNIC_TYPE] = (
                        constants.VNIC_TYPE_DIRECT)
                else:
                    db_member_dict[constants.VNIC_TYPE] = (
                        constants.VNIC_TYPE_NORMAL)

                member_dict = db_prepare.create_member(db_member_dict,
                                                       self.pool_id,
                                                       bool(pool.health_monitor))

                self._test_lb_and_listener_and_pool_statuses(context.session)

                db_member = self._validate_create_member(context.session,
                                                         member_dict)

                # Prepare the data for the driver data model
                provider_member = (
                    driver_utils.db_member_to_provider_member(db_member))

                # Dispatch to the driver
                LOG.info("Sending create Member %s to provider %s",
                         db_member.id, driver.name)
                driver_utils.call_provider(
                    driver.name, driver.member_create, provider_member)

                context.session.commit()
            except Exception:
                with excutils.save_and_reraise_exception():
                    context.session.rollback()

            with context.session.begin():
                db_member = self._get_db_member(context.session, db_member.id)
            result = self._convert_db_to_type(db_member,
                                              member_types.MemberResponse)
            return member_types.MemberRootResponse(member=result)

        def _graph_create(self, lock_session, member_dict):
            pool = self.repositories.pool.get(lock_session, id=self.pool_id)

            # Validate and store port SR-IOV vnic_type
            request_sriov = member_dict.pop('request_sriov')
            flavor_dict = {}
            if pool.load_balancer.flavor_id:
                try:
                    flavor_dict = (
                        self.repositories.flavor.get_flavor_metadata_dict(
                            lock_session, pool.load_balancer.flavor_id))
                except sa_exception.NoResultFound:
                    LOG.error("load balancer has a flavor ID: %s that was not "
                              "found in the database. Assuming no flavor.",
                              pool.load_balancer.flavor_id)
            if (request_sriov and not
                    flavor_dict.get(constants.ALLOW_MEMBER_SRIOV, False)):
                raise exceptions.MemberSRIOVDisabled

            if request_sriov:
                member_dict[constants.VNIC_TYPE] = constants.VNIC_TYPE_DIRECT
            else:
                member_dict[constants.VNIC_TYPE] = constants.VNIC_TYPE_NORMAL

            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

        def _set_default_on_none(self, member):
            """Reset settings to their default values if None/null was passed in

            A None/null value can be passed in to clear a value. PUT values
            that were not provided by the user have a type of wtypes.UnsetType.
            If the user is attempting to clear values, they should either
            be set to None (for example in the name field) or they should be
            reset to their default values.
            This method is intended to handle those values that need to be set
            back to a default value.
            """
            if member.backup is None:
                member.backup = False
            if member.weight is None:
                member.weight = constants.DEFAULT_WEIGHT

        @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')
            with context.session.begin():
                db_member = self._get_db_member(context.session, id,
                                                show_deleted=False)
                pool = self.repositories.pool.get(context.session,
                                                  id=db_member.pool_id)
                project_id, provider = self._get_lb_project_id_provider(
                    context.session, pool.load_balancer_id)

            self._auth_validate_action(context, project_id, constants.RBAC_PUT)

            self._validate_pool_id(id, db_member.pool_id)

            self._set_default_on_none(member)

            # Load the driver early as it also provides validation
            driver = driver_factory.get_driver(provider)

            with context.session.begin():
                self._test_lb_and_listener_and_pool_statuses(context.session,
                                                             member=db_member)

                # Prepare the data for the driver data model
                member_dict = member.to_dict(render_unsets=False)
                member_dict['id'] = id
                provider_member_dict = (
                    driver_utils.member_dict_to_provider_dict(member_dict))

                # Also prepare the baseline object data
                old_provider_member = driver_utils.db_member_to_provider_member(
                    db_member)

                # Dispatch to the driver
                LOG.info("Sending update Member %s to provider %s", id,
                         driver.name)
                driver_utils.call_provider(
                    driver.name, driver.member_update,
                    old_provider_member,
                    driver_dm.Member.from_dict(provider_member_dict))

                # Update the database to reflect what the driver just accepted
                member.provisioning_status = constants.PENDING_UPDATE
                db_member_dict = member.to_dict(render_unsets=False)
                self.repositories.member.update(context.session, id,
                                                **db_member_dict)

            # Force SQL alchemy to query the DB, otherwise we get inconsistent
            # results
            context.session.expire_all()
            with context.session.begin():
                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)

        @wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
        def delete(self, id):
            """Deletes a pool member."""
            context = pecan_request.context.get('octavia_context')
            with context.session.begin():
                db_member = self._get_db_member(context.session, id,
                                                show_deleted=False)

                pool = self.repositories.pool.get(context.session,
                                                  id=db_member.pool_id)
                project_id, provider = self._get_lb_project_id_provider(
                    context.session, pool.load_balancer_id)

            self._auth_validate_action(context, project_id, constants.RBAC_DELETE)

            self._validate_pool_id(id, db_member.pool_id)

            # Load the driver early as it also provides validation
            driver = driver_factory.get_driver(provider)

            with context.session.begin():
                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)

                LOG.info("Sending delete Member %s to provider %s", id,
                         driver.name)
                provider_member = (
                    driver_utils.db_member_to_provider_member(db_member))
                driver_utils.call_provider(driver.name, driver.member_delete,
                                           provider_member)

    class MembersController(MemberController):

        def __init__(self, pool_id):
            super().__init__(pool_id)

        @wsme_pecan.wsexpose(None, wtypes.text,
                             body=member_types.MembersRootPUT, status_code=202)
        def put(self, additive_only=False, members_=None):
            """Updates all members."""
            members = members_.members
            additive_only = strutils.bool_from_string(additive_only)
            context = pecan_request.context.get('octavia_context')

            with context.session.begin():
                db_pool = self._get_db_pool(context.session, self.pool_id)

                project_id, provider = self._get_lb_project_id_provider(
                    context.session, db_pool.load_balancer_id)

            # Check POST+PUT+DELETE since this operation is all of 'CUD'
            self._auth_validate_action(context, project_id, constants.RBAC_POST)
            self._auth_validate_action(context, project_id, constants.RBAC_PUT)
            if not additive_only:
                self._auth_validate_action(context, project_id,
                                           constants.RBAC_DELETE)

            # Load the driver early as it also provides validation
            driver = driver_factory.get_driver(provider)

            with context.session.begin():
                self._test_lb_and_listener_and_pool_statuses(context.session)

                # Reload the pool, the members may have been updated between the
                # first query in this function and the lock of the loadbalancer
                db_pool = self._get_db_pool(context.session, self.pool_id)
                old_members = db_pool.members

                old_member_uniques = {
                    (m.ip_address, m.protocol_port): m.id for m in old_members}
                new_member_uniques = [
                    (m.address, m.protocol_port) for m in members]

                # Find members that are brand new or updated
                new_members = []
                updated_members = []
                updated_member_uniques = set()
                for m in members:
                    key = (m.address, m.protocol_port)
                    if key not in old_member_uniques:
                        validate.ip_not_reserved(m.address)
                        new_members.append(m)
                    else:
                        m.id = old_member_uniques[key]
                        if key in updated_member_uniques:
                            LOG.error("Member %s is updated multiple times in "
                                      "the same batch request.", m.id)
                            raise exceptions.ValidationException(
                                detail=_("Member must be updated only once in the "
                                         "same request."))
                        updated_member_uniques.add(key)
                        updated_members.append(m)

                # Find members that are deleted
                deleted_members = []
                for m in old_members:
                    if (m.ip_address, m.protocol_port) not in new_member_uniques:
                        deleted_members.append(m)

                if not (deleted_members or new_members or updated_members):
                    LOG.info("Member batch update is a noop, rolling back and "
                             "returning early.")
                    context.session.rollback()
                    return

                if additive_only:
                    member_count_diff = len(new_members)
                else:
                    member_count_diff = len(new_members) - len(deleted_members)
                if member_count_diff > 0 and self.repositories.check_quota_met(
                        context.session, data_models.Member,
                        db_pool.project_id, count=member_count_diff):
                    raise exceptions.QuotaException(
                        resource=data_models.Member._name())

                provider_members = []
                valid_subnets = set()
                # Create new members
                for m in new_members:
                    # NOTE(mnaser): In order to avoid hitting the Neutron API hard
                    # when creating many new members, we cache the
                    # validation results. We also validate new
                    # members only since subnet ID is immutable.
                    # If the member doesn't have a subnet, or the subnet is
                    # already valid, move on. Run validate and add it to
                    # cache otherwise.
                    if m.subnet_id and m.subnet_id not in valid_subnets:
                        # If the subnet does not exist,
                        # raise an exception and get out.
                        if not validate.subnet_exists(
                                m.subnet_id, context=context):
                            raise exceptions.NotFound(
                                resource='Subnet', id=m.subnet_id)

                        # Mark the subnet as valid for future runs.
                        valid_subnets.add(m.subnet_id)

                    m = m.to_dict(render_unsets=False)
                    m['project_id'] = db_pool.project_id
                    created_member = self._graph_create(context.session, m)
                    provider_member = driver_utils.db_member_to_provider_member(
                        created_member)
                    provider_members.append(provider_member)
                # Update old members
                for m in updated_members:
                    m.provisioning_status = constants.PENDING_UPDATE
                    m.project_id = db_pool.project_id
                    db_member_dict = m.to_dict(render_unsets=False)
                    db_member_dict.pop('id')
                    # We don't allow updating the vnic_type
                    # TODO(johnsom) Give the user an error once we change the
                    #               wsme type for batch member update to not use
                    #               the MemberPOST type
                    db_member_dict.pop(constants.REQUEST_SRIOV)
                    self.repositories.member.update(
                        context.session, m.id, **db_member_dict)

                    m.pool_id = self.pool_id
                    provider_members.append(
                        driver_utils.db_member_to_provider_member(m))
                # Delete old members
                for m in deleted_members:
                    if additive_only:
                        # Members are appended to the dict and their status remains
                        # unchanged, because they are logically "untouched".
                        db_member_dict = m.to_dict(render_unsets=False)
                        db_member_dict.pop('id')
                        m.pool_id = self.pool_id
                        provider_members.append(
                            driver_utils.db_member_to_provider_member(m))
                    else:
                        # Members are changed to PENDING_DELETE and not passed.
                        self.repositories.member.update(
                            context.session, m.id,
                            provisioning_status=constants.PENDING_DELETE)

                # Dispatch to the driver
                LOG.info("Sending Pool %s batch member update to provider %s",
                         db_pool.id, driver.name)
                driver_utils.call_provider(
                    driver.name, driver.member_batch_update, db_pool.id,
                    provider_members)

this page last updated: 2025-10-06 11:22:08

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