# octavia.api.v2.controllers.l7rule

# Source code for octavia.api.v2.controllers.l7rule

    #    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 pecan import request as pecan_request
    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 l7rule as l7rule_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 api as db_api
    from octavia.db import prepare as db_prepare

    LOG = logging.getLogger(__name__)

    class L7RuleController(base.BaseController):
        RBAC_TYPE = constants.RBAC_L7RULE

        def __init__(self, l7policy_id):
            super().__init__()
            self.l7policy_id = l7policy_id

        @wsme_pecan.wsexpose(l7rule_types.L7RuleRootResponse, wtypes.text,
                             [wtypes.text], ignore_extra_args=True)
        def get(self, id, fields=None):
            """Gets a single l7rule's details."""
            context = pecan_request.context.get('octavia_context')
            db_l7rule = self._get_db_l7rule(context.session, id,
                                            show_deleted=False)

            self._auth_validate_action(context, db_l7rule.project_id,
                                       constants.RBAC_GET_ONE)

            result = self._convert_db_to_type(
                db_l7rule, l7rule_types.L7RuleResponse)
            if fields is not None:
                result = self._filter_fields([result], fields)[0]
            return l7rule_types.L7RuleRootResponse(rule=result)

        @wsme_pecan.wsexpose(l7rule_types.L7RulesRootResponse, [wtypes.text],
                             ignore_extra_args=True)
        def get_all(self, fields=None):
            """Lists all l7rules of a l7policy."""
            pcontext = pecan_request.context
            context = pcontext.get('octavia_context')

            l7policy = self._get_db_l7policy(context.session, self.l7policy_id,
                                             show_deleted=False)

            self._auth_validate_action(context, l7policy.project_id,
                                       constants.RBAC_GET_ALL)

            db_l7rules, links = self.repositories.l7rule.get_all_API_list(
                context.session, show_deleted=False, l7policy_id=self.l7policy_id,
                pagination_helper=pcontext.get(constants.PAGINATION_HELPER))
            result = self._convert_db_to_type(
                db_l7rules, [l7rule_types.L7RuleResponse])
            if fields is not None:
                result = self._filter_fields(result, fields)
            return l7rule_types.L7RulesRootResponse(
                rules=result, rules_links=links)

        def _test_lb_listener_policy_statuses(self, session):
            """Verify load balancer is in a mutable state."""
            l7policy = self._get_db_l7policy(session, self.l7policy_id)
            listener_id = l7policy.listener_id
            load_balancer_id = l7policy.listener.load_balancer_id
            # Check the parent is not locked for some reason (ERROR, etc.)
            if l7policy.provisioning_status not in constants.MUTABLE_STATUSES:
                raise exceptions.ImmutableObject(resource='L7Policy',
                                                 id=self.l7policy_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=[listener_id], l7policy_id=self.l7policy_id):
                LOG.info("L7Rule 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 _check_l7policy_max_rules(self, session):
            """Checks to make sure the L7Policy doesn't have too many rules."""
            count = self.repositories.l7rule.count(
                session, l7policy_id=self.l7policy_id)
            if count >= constants.MAX_L7RULES_PER_L7POLICY:
                raise exceptions.TooManyL7RulesOnL7Policy(id=self.l7policy_id)

        def _validate_create_l7rule(self, lock_session, l7rule_dict):
            try:
                return self.repositories.l7rule.create(lock_session, **l7rule_dict)
            except odb_exceptions.DBDuplicateEntry as e:
                raise exceptions.IDAlreadyExists() from e
            except odb_exceptions.DBReferenceError as e:
                raise exceptions.InvalidOption(value=l7rule_dict.get(e.key),
                                               option=e.key) from e
            except odb_exceptions.DBError as e:
                raise exceptions.APIException() from e

        @wsme_pecan.wsexpose(l7rule_types.L7RuleRootResponse,
                             body=l7rule_types.L7RuleRootPOST, status_code=201)
        def post(self, rule_):
            """Creates a l7rule on an l7policy."""
            l7rule = rule_.rule
            context = pecan_request.context.get('octavia_context')

            db_l7policy = self._get_db_l7policy(context.session, self.l7policy_id,
                                                show_deleted=False)
            load_balancer_id, listener_id = self._get_listener_and_loadbalancer_id(
                db_l7policy)
            l7rule.project_id, provider = self._get_lb_project_id_provider(
                context.session, load_balancer_id)
            self._auth_validate_action(context, l7rule.project_id,
                                       constants.RBAC_POST)

            try:
                validate.l7rule_data(l7rule)
            except Exception as e:
                raise exceptions.L7RuleValidation(error=e)

            self._check_l7policy_max_rules(context.session)

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

            lock_session = db_api.get_session(autocommit=False)
            try:
                if self.repositories.check_quota_met(
                        context.session,
                        lock_session,
                        data_models.L7Rule,
                        l7rule.project_id):
                    raise exceptions.QuotaException(
                        resource=data_models.L7Rule._name())

                l7rule_dict = db_prepare.create_l7rule(
                    l7rule.to_dict(render_unsets=True), self.l7policy_id)

                self._test_lb_listener_policy_statuses(lock_session)

                db_l7rule = self._validate_create_l7rule(lock_session, l7rule_dict)

                # Prepare the data for the driver data model
                provider_l7rule = (
                    driver_utils.db_l7rule_to_provider_l7rule(db_l7rule))

                # Dispatch to the driver
                LOG.info("Sending create L7 Rule %s to provider %s",
                         db_l7rule.id, driver.name)
                driver_utils.call_provider(
                    driver.name, driver.l7rule_create, provider_l7rule)

                lock_session.commit()
            except Exception:
                with excutils.save_and_reraise_exception():
                    lock_session.rollback()

            db_l7rule = self._get_db_l7rule(context.session, db_l7rule.id)
            result = self._convert_db_to_type(db_l7rule,
                                              l7rule_types.L7RuleResponse)
            return l7rule_types.L7RuleRootResponse(rule=result)

        def _graph_create(self, lock_session, rule_dict):
            try:
                validate.l7rule_data(l7rule_types.L7RulePOST(**rule_dict))
            except Exception as e:
                raise exceptions.L7RuleValidation(error=e)
            rule_dict = db_prepare.create_l7rule(rule_dict, self.l7policy_id)
            db_rule = self._validate_create_l7rule(lock_session, rule_dict)

            return db_rule

        @wsme_pecan.wsexpose(l7rule_types.L7RuleRootResponse,
                             wtypes.text, body=l7rule_types.L7RuleRootPUT,
                             status_code=200)
        def put(self, id, l7rule_):
            """Updates a l7rule."""
            l7rule = l7rule_.rule
            context = pecan_request.context.get('octavia_context')
            db_l7rule = self._get_db_l7rule(context.session, id,
                                            show_deleted=False)
            db_l7policy = self._get_db_l7policy(context.session, self.l7policy_id,
                                                show_deleted=False)
            load_balancer_id, listener_id = self._get_listener_and_loadbalancer_id(
                db_l7policy)
            project_id, provider = self._get_lb_project_id_provider(
                context.session, load_balancer_id)

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

            # Handle the invert unset
            if l7rule.invert is None:
                l7rule.invert = False

            new_l7rule = db_l7rule.to_dict()
            new_l7rule.update(l7rule.to_dict())
            new_l7rule = data_models.L7Rule.from_dict(new_l7rule)

            try:
                validate.l7rule_data(new_l7rule)
            except Exception as e:
                raise exceptions.L7RuleValidation(error=e)

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

            with db_api.get_lock_session() as lock_session:

                self._test_lb_listener_policy_statuses(lock_session)

                # Prepare the data for the driver data model
                l7rule_dict = l7rule.to_dict(render_unsets=False)
                l7rule_dict['id'] = id
                provider_l7rule_dict = (
                    driver_utils.l7rule_dict_to_provider_dict(l7rule_dict))

                # Also prepare the baseline object data
                old_provider_l7rule = driver_utils.db_l7rule_to_provider_l7rule(
                    db_l7rule)

                # Dispatch to the driver
                LOG.info("Sending update L7 Rule %s to provider %s", id,
                         driver.name)
                driver_utils.call_provider(
                    driver.name, driver.l7rule_update,
                    old_provider_l7rule,
                    driver_dm.L7Rule.from_dict(provider_l7rule_dict))

                # Update the database to reflect what the driver just accepted
                l7rule.provisioning_status = constants.PENDING_UPDATE
                db_l7rule_dict = l7rule.to_dict(render_unsets=False)
                self.repositories.l7rule.update(lock_session, id, **db_l7rule_dict)

            # Force SQL alchemy to query the DB, otherwise we get inconsistent
            # results
            context.session.expire_all()
            db_l7rule = self._get_db_l7rule(context.session, id)
            result = self._convert_db_to_type(db_l7rule,
                                              l7rule_types.L7RuleResponse)
            return l7rule_types.L7RuleRootResponse(rule=result)

        @wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
        def delete(self, id):
            """Deletes a l7rule."""
            context = pecan_request.context.get('octavia_context')
            db_l7rule = self._get_db_l7rule(context.session, id,
                                            show_deleted=False)

            db_l7policy = self._get_db_l7policy(context.session, self.l7policy_id,
                                                show_deleted=False)
            load_balancer_id, listener_id = self._get_listener_and_loadbalancer_id(
                db_l7policy)
            project_id, provider = self._get_lb_project_id_provider(
                context.session, load_balancer_id)

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

            if db_l7rule.provisioning_status == constants.DELETED:
                return

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

            with db_api.get_lock_session() as lock_session:

                self._test_lb_listener_policy_statuses(lock_session)

                self.repositories.l7rule.update(
                    lock_session, db_l7rule.id,
                    provisioning_status=constants.PENDING_DELETE)

                LOG.info("Sending delete L7 Rule %s to provider %s", id,
                         driver.name)
                provider_l7rule = (
                    driver_utils.db_l7rule_to_provider_l7rule(db_l7rule))
                driver_utils.call_provider(driver.name, driver.l7rule_delete,
                                           provider_l7rule)

this page last updated: 2025-07-16 18:40:57

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