298 lines
13 KiB
Python
298 lines
13 KiB
Python
# Copyright 2014 Rackspace
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# 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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from oslo_config import cfg
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from oslo_db import exception as odb_exceptions
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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.controllers import listener
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from octavia.api.v1.controllers import load_balancer_statistics as lb_stats
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from octavia.api.v1.controllers import pool
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from octavia.api.v1.types import load_balancer as lb_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 utils
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import octavia.common.validate as validate
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from octavia.db import api as db_api
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from octavia.db import prepare as db_prepare
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from octavia.i18n import _
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class LoadBalancersController(base.BaseController):
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def __init__(self):
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super(LoadBalancersController, self).__init__()
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self.handler = self.handler.load_balancer
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@wsme_pecan.wsexpose(lb_types.LoadBalancerResponse, wtypes.text)
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def get_one(self, id):
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"""Gets a single load balancer's details."""
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context = pecan.request.context.get('octavia_context')
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load_balancer = self._get_db_lb(context.session, id)
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return self._convert_db_to_type(load_balancer,
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lb_types.LoadBalancerResponse)
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@wsme_pecan.wsexpose([lb_types.LoadBalancerResponse], wtypes.text,
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wtypes.text)
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def get_all(self, tenant_id=None, project_id=None):
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"""Lists all load balancers."""
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# NOTE(blogan): tenant_id and project_id are optional query parameters
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# tenant_id and project_id are the same thing. tenant_id will be kept
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# around for a short amount of time.
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context = pecan.request.context.get('octavia_context')
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project_id = context.project_id or project_id or tenant_id
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load_balancers = self.repositories.load_balancer.get_all(
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context.session, project_id=project_id)
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return self._convert_db_to_type(load_balancers,
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[lb_types.LoadBalancerResponse])
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def _test_lb_status(self, session, id, lb_status=constants.PENDING_UPDATE):
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"""Verify load balancer is in a mutable state."""
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lb_repo = self.repositories.load_balancer
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if not lb_repo.test_and_set_provisioning_status(
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session, id, lb_status):
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LOG.info("Load Balancer %s is immutable.", id)
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db_lb = lb_repo.get(session, id=id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=id)
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def _create_load_balancer_graph_db(self, session,
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lock_session, load_balancer):
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prepped_lb = db_prepare.create_load_balancer_tree(
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load_balancer.to_dict(render_unsets=True))
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try:
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db_lb = self.repositories.create_load_balancer_tree(
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session, lock_session, prepped_lb)
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except Exception:
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raise
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return db_lb
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def _load_balancer_graph_to_handler(self, context, db_lb):
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try:
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LOG.info("Sending full load balancer configuration %s to "
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"the handler", db_lb.id)
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self.handler.create(db_lb)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.load_balancer.update(
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context.session, db_lb.id,
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provisioning_status=constants.ERROR)
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return self._convert_db_to_type(db_lb, lb_types.LoadBalancerResponse,
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children=True)
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@staticmethod
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def _validate_network_and_fill_or_validate_subnet(load_balancer):
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network = validate.network_exists_optionally_contains_subnet(
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network_id=load_balancer.vip.network_id,
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subnet_id=load_balancer.vip.subnet_id)
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# If subnet is not provided, pick the first subnet, preferring ipv4
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if not load_balancer.vip.subnet_id:
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network_driver = utils.get_network_driver()
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for subnet_id in network.subnets:
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# Use the first subnet, in case there are no ipv4 subnets
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if not load_balancer.vip.subnet_id:
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load_balancer.vip.subnet_id = subnet_id
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subnet = network_driver.get_subnet(subnet_id)
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if subnet.ip_version == 4:
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load_balancer.vip.subnet_id = subnet_id
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break
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if not load_balancer.vip.subnet_id:
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raise exceptions.ValidationException(detail=_(
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"Supplied network does not contain a subnet."
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))
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@wsme_pecan.wsexpose(lb_types.LoadBalancerResponse,
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body=lb_types.LoadBalancerPOST, status_code=202)
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def post(self, load_balancer):
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"""Creates a load balancer."""
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context = pecan.request.context.get('octavia_context')
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project_id = context.project_id
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if context.is_admin or CONF.auth_strategy == constants.NOAUTH:
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if load_balancer.project_id:
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project_id = load_balancer.project_id
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if not project_id:
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raise exceptions.ValidationException(detail=_(
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"Missing project ID in request where one is required."))
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load_balancer.project_id = project_id
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if not (load_balancer.vip.port_id or
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load_balancer.vip.network_id or
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load_balancer.vip.subnet_id):
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raise exceptions.ValidationException(detail=_(
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"VIP must contain one of: port_id, network_id, subnet_id."))
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# Validate the port id
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if load_balancer.vip.port_id:
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port = validate.port_exists(port_id=load_balancer.vip.port_id)
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load_balancer.vip.network_id = port.network_id
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# If no port id, validate the network id (and subnet if provided)
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elif load_balancer.vip.network_id:
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self._validate_network_and_fill_or_validate_subnet(load_balancer)
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# Validate just the subnet id
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elif load_balancer.vip.subnet_id:
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subnet = validate.subnet_exists(
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subnet_id=load_balancer.vip.subnet_id)
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load_balancer.vip.network_id = subnet.network_id
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lock_session = db_api.get_session(autocommit=False)
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if load_balancer.listeners:
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try:
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db_lb = self._create_load_balancer_graph_db(context.session,
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lock_session,
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load_balancer)
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lock_session.commit()
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except Exception:
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with excutils.save_and_reraise_exception():
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lock_session.rollback()
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return self._load_balancer_graph_to_handler(context, db_lb)
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else:
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if self.repositories.check_quota_met(
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context.session,
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lock_session,
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data_models.LoadBalancer,
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load_balancer.project_id):
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lock_session.rollback()
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raise exceptions.QuotaException
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try:
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lb_dict = db_prepare.create_load_balancer(load_balancer.to_dict(
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render_unsets=True
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))
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vip_dict = lb_dict.pop('vip', {})
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db_lb = self.repositories.create_load_balancer_and_vip(
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lock_session, lb_dict, vip_dict)
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lock_session.commit()
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except odb_exceptions.DBDuplicateEntry:
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lock_session.rollback()
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raise exceptions.IDAlreadyExists()
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except Exception:
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with excutils.save_and_reraise_exception():
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lock_session.rollback()
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# Handler will be responsible for sending to controller
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try:
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LOG.info("Sending created Load Balancer %s to the handler",
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db_lb.id)
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self.handler.create(db_lb)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.load_balancer.update(
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context.session, db_lb.id,
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provisioning_status=constants.ERROR)
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return self._convert_db_to_type(db_lb, lb_types.LoadBalancerResponse)
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@wsme_pecan.wsexpose(lb_types.LoadBalancerResponse,
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wtypes.text, status_code=202,
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body=lb_types.LoadBalancerPUT)
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def put(self, id, load_balancer):
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"""Updates a load balancer."""
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context = pecan.request.context.get('octavia_context')
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db_lb = self._get_db_lb(context.session, id)
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self._test_lb_status(context.session, id)
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try:
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LOG.info("Sending updated Load Balancer %s to the handler",
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id)
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self.handler.update(db_lb, load_balancer)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.load_balancer.update(
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context.session, id, provisioning_status=constants.ERROR)
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db_lb = self._get_db_lb(context.session, id)
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return self._convert_db_to_type(db_lb, lb_types.LoadBalancerResponse)
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def _delete(self, id, cascade=False):
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"""Deletes a load balancer."""
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context = pecan.request.context.get('octavia_context')
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db_lb = self._get_db_lb(context.session, id)
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self._test_lb_status(context.session, id,
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lb_status=constants.PENDING_DELETE)
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if (db_lb.listeners or db_lb.pools) and not cascade:
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msg = _("Cannot delete Load Balancer %s - it has children") % id
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LOG.exception(msg)
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raise exceptions.ValidationException(detail=msg)
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try:
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LOG.info("Sending deleted Load Balancer %s to the handler",
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db_lb.id)
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self.handler.delete(db_lb, cascade)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.load_balancer.update(
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context.session, db_lb.id,
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provisioning_status=constants.ERROR)
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return self._convert_db_to_type(db_lb, lb_types.LoadBalancerResponse)
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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 load balancer."""
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return self._delete(id, cascade=False)
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@pecan.expose()
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def _lookup(self, lb_id, *remainder):
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"""Overridden pecan _lookup method for custom routing.
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Verifies that the load balancer passed in the url exists, and if so
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decides which controller, if any, should control be passed.
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"""
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context = pecan.request.context.get('octavia_context')
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possible_remainder = ('listeners', 'pools', 'delete_cascade', 'stats')
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if lb_id and len(remainder) and (remainder[0] in possible_remainder):
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controller = remainder[0]
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remainder = remainder[1:]
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db_lb = self.repositories.load_balancer.get(context.session,
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id=lb_id)
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if not db_lb:
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LOG.info("Load Balancer %s was not found.", lb_id)
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raise exceptions.NotFound(
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resource=data_models.LoadBalancer._name(), id=lb_id)
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if controller == 'listeners':
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return listener.ListenersController(
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load_balancer_id=db_lb.id), remainder
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elif controller == 'pools':
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return pool.PoolsController(
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load_balancer_id=db_lb.id), remainder
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elif (controller == 'delete_cascade'):
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return LBCascadeDeleteController(db_lb.id), ''
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elif (controller == 'stats'):
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return lb_stats.LoadBalancerStatisticsController(
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loadbalancer_id=db_lb.id), remainder
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class LBCascadeDeleteController(LoadBalancersController):
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def __init__(self, lb_id):
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super(LBCascadeDeleteController, self).__init__()
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self.lb_id = lb_id
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@wsme_pecan.wsexpose(None, status_code=202)
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def delete(self):
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"""Deletes a load balancer."""
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return self._delete(self.lb_id, cascade=True)
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