168 lines
7.4 KiB
Python
168 lines
7.4 KiB
Python
# 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 oslo_db.exception as oslo_exc
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from oslo_log import log as logging
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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.v1.controllers import base
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from octavia.api.v1.types import l7rule as l7rule_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.common import validate
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from octavia.db import prepare as db_prepare
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LOG = logging.getLogger(__name__)
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class L7RuleController(base.BaseController):
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def __init__(self, load_balancer_id, listener_id, l7policy_id):
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super(L7RuleController, self).__init__()
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self.load_balancer_id = load_balancer_id
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self.listener_id = listener_id
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self.l7policy_id = l7policy_id
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self.handler = self.handler.l7rule
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@wsme_pecan.wsexpose(l7rule_types.L7RuleResponse, wtypes.text)
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def get(self, id):
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"""Gets a single l7rule's details."""
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context = pecan.request.context.get('octavia_context')
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db_l7rule = self._get_db_l7rule(context.session, id)
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return self._convert_db_to_type(db_l7rule,
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l7rule_types.L7RuleResponse)
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@wsme_pecan.wsexpose([l7rule_types.L7RuleResponse])
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def get_all(self):
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"""Lists all l7rules of a l7policy."""
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context = pecan.request.context.get('octavia_context')
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db_l7rules, _ = self.repositories.l7rule.get_all(
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context.session, l7policy_id=self.l7policy_id)
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return self._convert_db_to_type(db_l7rules,
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[l7rule_types.L7RuleResponse])
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def _test_lb_and_listener_statuses(self, session):
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"""Verify load balancer is in a mutable state."""
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if not self.repositories.test_and_set_lb_and_listeners_prov_status(
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session, self.load_balancer_id,
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constants.PENDING_UPDATE, constants.PENDING_UPDATE,
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listener_ids=[self.listener_id]):
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LOG.info("L7Rule cannot be created or modified because the "
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"Load Balancer is in an immutable state")
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lb_repo = self.repositories.load_balancer
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db_lb = lb_repo.get(session, id=self.load_balancer_id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=self.load_balancer_id)
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def _check_l7policy_max_rules(self, session):
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"""Checks to make sure the L7Policy doesn't have too many rules."""
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count = self.repositories.l7rule.count(
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session, l7policy_id=self.l7policy_id)
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if count >= constants.MAX_L7RULES_PER_L7POLICY:
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raise exceptions.TooManyL7RulesOnL7Policy(id=self.l7policy_id)
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@wsme_pecan.wsexpose(l7rule_types.L7RuleResponse,
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body=l7rule_types.L7RulePOST, status_code=202)
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def post(self, l7rule):
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"""Creates a l7rule on an l7policy."""
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try:
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validate.l7rule_data(l7rule)
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except Exception as e:
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raise exceptions.L7RuleValidation(error=e)
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context = pecan.request.context.get('octavia_context')
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self._check_l7policy_max_rules(context.session)
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l7rule_dict = db_prepare.create_l7rule(
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l7rule.to_dict(render_unsets=True), self.l7policy_id)
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self._test_lb_and_listener_statuses(context.session)
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try:
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db_l7rule = self.repositories.l7rule.create(context.session,
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**l7rule_dict)
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except oslo_exc.DBDuplicateEntry as de:
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# Setting LB and Listener back to active because this is just a
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# validation failure
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self.repositories.load_balancer.update(
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context.session, self.load_balancer_id,
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provisioning_status=constants.ACTIVE)
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self.repositories.listener.update(
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context.session, self.listener_id,
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provisioning_status=constants.ACTIVE)
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if ['id'] == de.columns:
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raise exceptions.IDAlreadyExists()
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try:
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LOG.info("Sending Creation of L7Rule %s to handler",
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db_l7rule.id)
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self.handler.create(db_l7rule)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.listener.update(
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context.session, self.listener_id,
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operating_status=constants.ERROR)
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db_l7rule = self._get_db_l7rule(context.session, db_l7rule.id)
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return self._convert_db_to_type(db_l7rule,
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l7rule_types.L7RuleResponse)
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@wsme_pecan.wsexpose(l7rule_types.L7RuleResponse,
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wtypes.text, body=l7rule_types.L7RulePUT,
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status_code=202)
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def put(self, id, l7rule):
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"""Updates a l7rule."""
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context = pecan.request.context.get('octavia_context')
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db_l7rule = self._get_db_l7rule(context.session, id)
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new_l7rule = db_l7rule.to_dict()
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new_l7rule.update(l7rule.to_dict())
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new_l7rule = data_models.L7Rule.from_dict(new_l7rule)
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try:
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validate.l7rule_data(new_l7rule)
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except Exception as e:
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raise exceptions.L7RuleValidation(error=e)
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self._test_lb_and_listener_statuses(context.session)
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try:
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LOG.info("Sending Update of L7Rule %s to handler", id)
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self.handler.update(db_l7rule, l7rule)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.listener.update(
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context.session, self.listener_id,
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operating_status=constants.ERROR)
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db_l7rule = self._get_db_l7rule(context.session, id)
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return self._convert_db_to_type(db_l7rule,
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l7rule_types.L7RuleResponse)
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@wsme_pecan.wsexpose(None, wtypes.text, status_code=202)
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def delete(self, id):
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"""Deletes a l7rule."""
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context = pecan.request.context.get('octavia_context')
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db_l7rule = self._get_db_l7rule(context.session, id)
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self._test_lb_and_listener_statuses(context.session)
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try:
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LOG.info("Sending Deletion of L7Rule %s to handler",
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db_l7rule.id)
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self.handler.delete(db_l7rule)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.listener.update(
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context.session, self.listener_id,
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operating_status=constants.ERROR)
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db_l7rule = self.repositories.l7rule.get(context.session, id=id)
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return self._convert_db_to_type(db_l7rule,
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l7rule_types.L7RuleResponse)
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