Load Balancing as a Service (LBaaS) for OpenStack
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octavia/octavia/api/v2/controllers/load_balancer.py

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# 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_config import cfg
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 expose as pecan_expose
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.controllers import listener
from octavia.api.v2.controllers import pool
from octavia.api.v2.types import load_balancer as lb_types
from octavia.common import constants
from octavia.common import data_models
from octavia.common import exceptions
from octavia.common import stats
from octavia.common import utils
import octavia.common.validate as validate
from octavia.db import api as db_api
from octavia.db import prepare as db_prepare
from octavia.i18n import _
from octavia.network import base as network_base
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
class LoadBalancersController(base.BaseController):
RBAC_TYPE = constants.RBAC_LOADBALANCER
def __init__(self):
super(LoadBalancersController, self).__init__()
@wsme_pecan.wsexpose(lb_types.LoadBalancerRootResponse, wtypes.text,
[wtypes.text], ignore_extra_args=True)
def get_one(self, id, fields=None):
"""Gets a single load balancer's details."""
context = pecan_request.context.get('octavia_context')
load_balancer = self._get_db_lb(context.session, id,
show_deleted=False)
if not load_balancer:
raise exceptions.NotFound(
resource=data_models.LoadBalancer._name(),
id=id)
self._auth_validate_action(context, load_balancer.project_id,
constants.RBAC_GET_ONE)
result = self._convert_db_to_type(
load_balancer, lb_types.LoadBalancerResponse)
if fields is not None:
result = self._filter_fields([result], fields)[0]
return lb_types.LoadBalancerRootResponse(loadbalancer=result)
@wsme_pecan.wsexpose(lb_types.LoadBalancersRootResponse, wtypes.text,
[wtypes.text], ignore_extra_args=True)
def get_all(self, project_id=None, fields=None):
"""Lists all load balancers."""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
query_filter = self._auth_get_all(context, project_id)
load_balancers, links = (
self.repositories.load_balancer.get_all_API_list(
context.session, show_deleted=False,
pagination_helper=pcontext.get(constants.PAGINATION_HELPER),
**query_filter))
result = self._convert_db_to_type(
load_balancers, [lb_types.LoadBalancerResponse])
if fields is not None:
result = self._filter_fields(result, fields)
return lb_types.LoadBalancersRootResponse(
loadbalancers=result, loadbalancers_links=links)
def _test_lb_status(self, session, id, lb_status=constants.PENDING_UPDATE):
"""Verify load balancer is in a mutable state."""
lb_repo = self.repositories.load_balancer
if not lb_repo.test_and_set_provisioning_status(
session, id, lb_status):
prov_status = lb_repo.get(session, id=id).provisioning_status
LOG.info("Invalid state %(state)s of loadbalancer resource %(id)s",
{"state": prov_status, "id": id})
raise exceptions.LBPendingStateError(
state=prov_status, id=id)
def _test_and_set_failover_prov_status(self, session, id):
lb_repo = self.repositories.load_balancer
if not lb_repo.set_status_for_failover(session, id,
constants.PENDING_UPDATE):
prov_status = lb_repo.get(session, id=id).provisioning_status
LOG.info("Invalid state %(state)s of loadbalancer resource %(id)s",
{"state": prov_status, "id": id})
raise exceptions.LBPendingStateError(
state=prov_status, id=id)
@staticmethod
def _validate_network_and_fill_or_validate_subnet(load_balancer,
context=None):
network = validate.network_exists_optionally_contains_subnet(
network_id=load_balancer.vip_network_id,
subnet_id=load_balancer.vip_subnet_id,
context=context)
if not load_balancer.vip_subnet_id:
network_driver = utils.get_network_driver()
if load_balancer.vip_address:
for subnet_id in network.subnets:
subnet = network_driver.get_subnet(subnet_id)
if validate.is_ip_member_of_cidr(load_balancer.vip_address,
subnet.cidr):
load_balancer.vip_subnet_id = subnet_id
break
if not load_balancer.vip_subnet_id:
raise exceptions.ValidationException(detail=_(
"Supplied network does not contain a subnet for "
"VIP address specified."
))
else:
# If subnet and IP are not provided, pick the first subnet with
# enough available IPs, preferring ipv4
if not network.subnets:
raise exceptions.ValidationException(detail=_(
"Supplied network does not contain a subnet."
))
ip_avail = network_driver.get_network_ip_availability(
network)
if (CONF.controller_worker.loadbalancer_topology ==
constants.TOPOLOGY_SINGLE):
num_req_ips = 2
if (CONF.controller_worker.loadbalancer_topology ==
constants.TOPOLOGY_ACTIVE_STANDBY):
num_req_ips = 3
subnets = [subnet_id for subnet_id in network.subnets if
utils.subnet_ip_availability(ip_avail, subnet_id,
num_req_ips)]
if not subnets:
raise exceptions.ValidationException(detail=_(
"Subnet(s) in the supplied network do not contain "
"enough available IPs."
))
for subnet_id in subnets:
# Use the first subnet, in case there are no ipv4 subnets
if not load_balancer.vip_subnet_id:
load_balancer.vip_subnet_id = subnet_id
subnet = network_driver.get_subnet(subnet_id)
if subnet.ip_version == 4:
load_balancer.vip_subnet_id = subnet_id
break
@staticmethod
def _validate_port_and_fill_or_validate_subnet(load_balancer,
context=None):
port = validate.port_exists(port_id=load_balancer.vip_port_id,
context=context)
validate.check_port_in_use(port)
load_balancer.vip_network_id = port.network_id
# validate the request vip port whether applied the qos_policy and
# store the port_qos_policy to loadbalancer obj if possible. The
# default behavior is that if 'vip_qos_policy_id' is specified in the
# request, it will override the qos_policy applied on vip_port.
port_qos_policy_id = port.qos_policy_id
if (port_qos_policy_id and
isinstance(load_balancer.vip_qos_policy_id, wtypes.UnsetType)):
load_balancer.vip_qos_policy_id = port_qos_policy_id
# Identify the subnet for this port
if load_balancer.vip_subnet_id:
validate.subnet_exists(subnet_id=load_balancer.vip_subnet_id,
context=context)
else:
if load_balancer.vip_address:
for port_fixed_ip in port.fixed_ips:
if port_fixed_ip.ip_address == load_balancer.vip_address:
load_balancer.vip_subnet_id = port_fixed_ip.subnet_id
break
if not load_balancer.vip_subnet_id:
raise exceptions.ValidationException(detail=_(
"Specified VIP address not found on the "
"specified VIP port."))
elif len(port.fixed_ips) == 1:
load_balancer.vip_subnet_id = port.fixed_ips[0].subnet_id
else:
raise exceptions.ValidationException(detail=_(
"VIP port's subnet could not be determined. Please "
"specify either a VIP subnet or address."))
def _validate_vip_request_object(self, load_balancer, context=None):
allowed_network_objects = []
if CONF.networking.allow_vip_port_id:
allowed_network_objects.append('vip_port_id')
if CONF.networking.allow_vip_network_id:
allowed_network_objects.append('vip_network_id')
if CONF.networking.allow_vip_subnet_id:
allowed_network_objects.append('vip_subnet_id')
msg = _("use of %(object)s is disallowed by this deployment's "
"configuration.")
if (load_balancer.vip_port_id and
not CONF.networking.allow_vip_port_id):
raise exceptions.ValidationException(
detail=msg % {'object': 'vip_port_id'})
if (load_balancer.vip_network_id and
not CONF.networking.allow_vip_network_id):
raise exceptions.ValidationException(
detail=msg % {'object': 'vip_network_id'})
if (load_balancer.vip_subnet_id and
not CONF.networking.allow_vip_subnet_id):
raise exceptions.ValidationException(
detail=msg % {'object': 'vip_subnet_id'})
if not (load_balancer.vip_port_id or
load_balancer.vip_network_id or
load_balancer.vip_subnet_id):
raise exceptions.VIPValidationException(
objects=', '.join(allowed_network_objects))
# Validate the port id
if load_balancer.vip_port_id:
self._validate_port_and_fill_or_validate_subnet(load_balancer,
context=context)
# If no port id, validate the network id (and subnet if provided)
elif load_balancer.vip_network_id:
self._validate_network_and_fill_or_validate_subnet(load_balancer,
context=context)
# Validate just the subnet id
elif load_balancer.vip_subnet_id:
subnet = validate.subnet_exists(
subnet_id=load_balancer.vip_subnet_id)
load_balancer.vip_network_id = subnet.network_id
if load_balancer.vip_qos_policy_id:
validate.qos_policy_exists(
qos_policy_id=load_balancer.vip_qos_policy_id)
def _create_vip_port_if_not_exist(self, load_balancer_db):
"""Create vip port."""
network_driver = utils.get_network_driver()
try:
return network_driver.allocate_vip(load_balancer_db)
except network_base.AllocateVIPException as e:
# Convert neutron style exception to octavia style
# if the error was API ready
if getattr(e, 'orig_code', None) is not None:
e.code = e.orig_code
if getattr(e, 'orig_msg', None) is not None:
e.message = e.orig_msg
e.msg = e.orig_msg
raise e
def _get_provider(self, session, load_balancer):
"""Decide on the provider for this load balancer."""
provider = None
if not isinstance(load_balancer.flavor_id, wtypes.UnsetType):
try:
provider = self.repositories.flavor.get_flavor_provider(
session, load_balancer.flavor_id)
except sa_exception.NoResultFound:
raise exceptions.ValidationException(
detail=_("Invalid flavor_id."))
# No provider specified and no flavor specified, use conf default
if (isinstance(load_balancer.provider, wtypes.UnsetType) and
not provider):
provider = CONF.api_settings.default_provider_driver
# Both provider and flavor specified, they must match
elif (not isinstance(load_balancer.provider, wtypes.UnsetType) and
provider):
if provider != load_balancer.provider:
raise exceptions.ProviderFlavorMismatchError(
flav=load_balancer.flavor_id, prov=load_balancer.provider)
# No flavor, but provider, use the provider specified
elif not provider:
provider = load_balancer.provider
# Otherwise, use the flavor provider we found above
return provider
def _apply_flavor_to_lb_dict(self, lock_session, driver, lb_dict):
flavor_dict = {}
if 'flavor_id' in lb_dict:
try:
flavor_dict = (
self.repositories.flavor.get_flavor_metadata_dict(
lock_session, lb_dict['flavor_id']))
except sa_exception.NoResultFound:
raise exceptions.ValidationException(
detail=_("Invalid flavor_id."))
# Make sure the driver will still accept the flavor metadata
if flavor_dict:
driver_utils.call_provider(driver.name, driver.validate_flavor,
flavor_dict)
# Apply the flavor settings to the load balanacer
# Use the configuration file settings as defaults
lb_dict[constants.TOPOLOGY] = flavor_dict.get(
constants.LOADBALANCER_TOPOLOGY,
CONF.controller_worker.loadbalancer_topology)
return flavor_dict
def _validate_flavor(self, session, load_balancer):
if not isinstance(load_balancer.flavor_id, wtypes.UnsetType):
flavor = self.repositories.flavor.get(session,
id=load_balancer.flavor_id)
if not flavor:
raise exceptions.ValidationException(
detail=_("Invalid flavor_id."))
if not flavor.enabled:
raise exceptions.DisabledOption(option='flavor',
value=load_balancer.flavor_id)
def _validate_and_return_az_dict(self, lock_session, driver, lb_dict):
az_dict = {}
if 'availability_zone' in lb_dict:
try:
az = self.repositories.availability_zone.get(
lock_session, name=lb_dict['availability_zone'])
az_dict = (
self.repositories.availability_zone
.get_availability_zone_metadata_dict(lock_session, az.name)
)
except sa_exception.NoResultFound:
raise exceptions.ValidationException(
detail=_("Invalid availability_zone."))
# Make sure the driver will still accept the availability zone metadata
if az_dict:
try:
driver_utils.call_provider(driver.name,
driver.validate_availability_zone,
az_dict)
except NotImplementedError:
raise exceptions.ProviderNotImplementedError(
prov=driver.name, user_msg="This provider does not support"
" availability zones.")
return az_dict
def _validate_availability_zone(self, session, load_balancer):
if not isinstance(load_balancer.availability_zone, wtypes.UnsetType):
az = self.repositories.availability_zone.get(
session, name=load_balancer.availability_zone)
if not az:
raise exceptions.ValidationException(
detail=_("Invalid availability zone."))
if not az.enabled:
raise exceptions.DisabledOption(
option='availability_zone',
value=load_balancer.availability_zone)
@wsme_pecan.wsexpose(lb_types.LoadBalancerFullRootResponse,
body=lb_types.LoadBalancerRootPOST, status_code=201)
def post(self, load_balancer):
"""Creates a load balancer."""
load_balancer = load_balancer.loadbalancer
context = pecan_request.context.get('octavia_context')
if not load_balancer.project_id and context.project_id:
load_balancer.project_id = context.project_id
if not load_balancer.project_id:
raise exceptions.ValidationException(detail=_(
"Missing project ID in request where one is required. "
"An administrator should check the keystone settings "
"in the Octavia configuration."))
self._auth_validate_action(context, load_balancer.project_id,
constants.RBAC_POST)
self._validate_vip_request_object(load_balancer, context=context)
self._validate_flavor(context.session, load_balancer)
self._validate_availability_zone(context.session, load_balancer)
provider = self._get_provider(context.session, load_balancer)
# 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.LoadBalancer,
load_balancer.project_id):
raise exceptions.QuotaException(
resource=data_models.LoadBalancer._name())
db_lb, db_pools, db_lists = None, None, None
lb_dict = db_prepare.create_load_balancer(load_balancer.to_dict(
render_unsets=False
))
vip_dict = lb_dict.pop('vip', {})
# Make sure we store the right provider in the DB
lb_dict['provider'] = driver.name
# NoneType can be weird here, have to force type a second time
listeners = lb_dict.pop('listeners', []) or []
pools = lb_dict.pop('pools', []) or []
flavor_dict = self._apply_flavor_to_lb_dict(lock_session, driver,
lb_dict)
az_dict = self._validate_and_return_az_dict(lock_session, driver,
lb_dict)
# Validate the network as soon as we have the AZ data
validate.network_allowed_by_config(
load_balancer.vip_network_id,
valid_networks=az_dict.get(constants.VALID_VIP_NETWORKS))
db_lb = self.repositories.create_load_balancer_and_vip(
lock_session, lb_dict, vip_dict)
# Pass the flavor dictionary through for the provider drivers
# This is a "virtual" lb_dict item that includes the expanded
# flavor dict instead of just the flavor_id we store in the DB.
lb_dict['flavor'] = flavor_dict
# Do the same with the availability_zone dict
lb_dict['availability_zone'] = az_dict
# See if the provider driver wants to create the VIP port
octavia_owned = False
try:
provider_vip_dict = driver_utils.vip_dict_to_provider_dict(
vip_dict)
vip_dict = driver_utils.call_provider(
driver.name, driver.create_vip_port, db_lb.id,
db_lb.project_id, provider_vip_dict)
vip = driver_utils.provider_vip_dict_to_vip_obj(vip_dict)
except exceptions.ProviderNotImplementedError:
# create vip port if not exist, driver didn't want to create
# the VIP port
vip = self._create_vip_port_if_not_exist(db_lb)
LOG.info('Created VIP port %s for provider %s.',
vip.port_id, driver.name)
# If a port_id wasn't passed in and we made it this far
# we created the VIP
if 'port_id' not in vip_dict or not vip_dict['port_id']:
octavia_owned = True
self.repositories.vip.update(
lock_session, db_lb.id, ip_address=vip.ip_address,
port_id=vip.port_id, network_id=vip.network_id,
subnet_id=vip.subnet_id, octavia_owned=octavia_owned)
if listeners or pools:
db_pools, db_lists = self._graph_create(
context.session, lock_session, db_lb, listeners, pools)
# Prepare the data for the driver data model
driver_lb_dict = driver_utils.lb_dict_to_provider_dict(
lb_dict, vip, db_pools, db_lists)
# Dispatch to the driver
LOG.info("Sending create Load Balancer %s to provider %s",
db_lb.id, driver.name)
driver_utils.call_provider(
driver.name, driver.loadbalancer_create,
driver_dm.LoadBalancer.from_dict(driver_lb_dict))
lock_session.commit()
except odb_exceptions.DBDuplicateEntry:
lock_session.rollback()
raise exceptions.IDAlreadyExists()
except Exception:
with excutils.save_and_reraise_exception():
lock_session.rollback()
db_lb = self._get_db_lb(context.session, db_lb.id)
result = self._convert_db_to_type(
db_lb, lb_types.LoadBalancerFullResponse)
return lb_types.LoadBalancerFullRootResponse(loadbalancer=result)
def _graph_create(self, session, lock_session, db_lb, listeners, pools):
# Track which pools must have a full specification
pools_required = set()
# Look through listeners and find any extra pools, and move them to the
# top level so they are created first.
for li in listeners:
default_pool = li.get('default_pool')
pool_name = (
default_pool.get('name') if default_pool else None)
# All pools need to have a name so they can be referenced
if default_pool and not pool_name:
raise exceptions.ValidationException(
detail='Pools must be named when creating a fully '
'populated loadbalancer.')
# If a pool has more than a name, assume it's a full specification
# (but use >3 because it will also have "enabled" and "tls_enabled"
# as default)
if default_pool and len(default_pool) > 3:
pools.append(default_pool)
li['default_pool'] = {'name': pool_name}
# Otherwise, it's a reference and we record it and move on
elif default_pool:
pools_required.add(pool_name)
# We also need to check policy redirects
for policy in li.get('l7policies'):
redirect_pool = policy.get('redirect_pool')
pool_name = (
redirect_pool.get('name') if redirect_pool else None)
# All pools need to have a name so they can be referenced
if redirect_pool and not pool_name:
raise exceptions.ValidationException(
detail='Pools must be named when creating a fully '
'populated loadbalancer.')
# If a pool has more than a name, assume it's a full spec
# (but use >2 because it will also have "enabled" and
# "tls_enabled" as default)
if redirect_pool and len(redirect_pool) > 3:
pool_name = redirect_pool['name']
policy['redirect_pool'] = {'name': pool_name}
pools.append(redirect_pool)
# Otherwise, it's a reference and we record it and move on
elif redirect_pool:
pools_required.add(pool_name)
# Make sure all pool names are unique.
pool_names = [p.get('name') for p in pools]
if len(set(pool_names)) != len(pool_names):
raise exceptions.ValidationException(
detail="Pool names must be unique when creating a fully "
"populated loadbalancer.")
# Make sure every reference is present in our spec list
for pool_ref in pools_required:
if pool_ref not in pool_names:
raise exceptions.ValidationException(
detail="Pool '{name}' was referenced but no full "
"definition was found.".format(name=pool_ref))
# Check quotas for pools.
if pools and self.repositories.check_quota_met(
session, lock_session, data_models.Pool, db_lb.project_id,
count=len(pools)):
raise exceptions.QuotaException(resource=data_models.Pool._name())
# Now create all of the pools ahead of the listeners.
new_pools = []
pool_name_ids = {}
for p in pools:
# Check that pools have mandatory attributes, since we have to
# bypass the normal validation layer to allow for name-only
for attr in ('protocol', 'lb_algorithm'):
if attr not in p:
raise exceptions.ValidationException(
detail="Pool definition for '{name}' missing required "
"attribute: {attr}".format(name=p['name'],
attr=attr))
p['load_balancer_id'] = db_lb.id
p['project_id'] = db_lb.project_id
new_pool = (pool.PoolsController()._graph_create(
session, lock_session, p))
new_pools.append(new_pool)
pool_name_ids[new_pool.name] = new_pool.id
# Now check quotas for listeners
if listeners and self.repositories.check_quota_met(
session, lock_session, data_models.Listener, db_lb.project_id,
count=len(listeners)):
raise exceptions.QuotaException(
resource=data_models.Listener._name())
# Now create all of the listeners
new_lists = []
for li in listeners:
default_pool = li.pop('default_pool', None)
# If there's a default pool, replace it with the ID
if default_pool:
pool_name = default_pool['name']
pool_id = pool_name_ids.get(pool_name)
if not pool_id:
raise exceptions.SingleCreateDetailsMissing(
type='Pool', name=pool_name)
li['default_pool_id'] = pool_id
li['load_balancer_id'] = db_lb.id
li['project_id'] = db_lb.project_id
new_lists.append(listener.ListenersController()._graph_create(
lock_session, li, pool_name_ids=pool_name_ids))
return new_pools, new_lists
@wsme_pecan.wsexpose(lb_types.LoadBalancerRootResponse,
wtypes.text, status_code=200,
body=lb_types.LoadBalancerRootPUT)
def put(self, id, load_balancer):
"""Updates a load balancer."""
load_balancer = load_balancer.loadbalancer
context = pecan_request.context.get('octavia_context')
db_lb = self._get_db_lb(context.session, id, show_deleted=False)
self._auth_validate_action(context, db_lb.project_id,
constants.RBAC_PUT)
if not isinstance(load_balancer.vip_qos_policy_id, wtypes.UnsetType):
network_driver = utils.get_network_driver()
validate.qos_extension_enabled(network_driver)
if load_balancer.vip_qos_policy_id is not None:
if db_lb.vip.qos_policy_id != load_balancer.vip_qos_policy_id:
validate.qos_policy_exists(load_balancer.vip_qos_policy_id)
# Load the driver early as it also provides validation
driver = driver_factory.get_driver(db_lb.provider)
with db_api.get_lock_session() as lock_session:
self._test_lb_status(lock_session, id)
# Prepare the data for the driver data model
lb_dict = load_balancer.to_dict(render_unsets=False)
lb_dict['id'] = id
vip_dict = lb_dict.pop('vip', {})
lb_dict = driver_utils.lb_dict_to_provider_dict(lb_dict)
if 'qos_policy_id' in vip_dict:
lb_dict['vip_qos_policy_id'] = vip_dict['qos_policy_id']
# Also prepare the baseline object data
old_provider_lb = (
driver_utils.db_loadbalancer_to_provider_loadbalancer(
db_lb, for_delete=True))
# Dispatch to the driver
LOG.info("Sending update Load Balancer %s to provider "
"%s", id, driver.name)
driver_utils.call_provider(
driver.name, driver.loadbalancer_update,
old_provider_lb,
driver_dm.LoadBalancer.from_dict(lb_dict))
db_lb_dict = load_balancer.to_dict(render_unsets=False)
if 'vip' in db_lb_dict:
db_vip_dict = db_lb_dict.pop('vip')
self.repositories.vip.update(lock_session, id, **db_vip_dict)
if db_lb_dict:
self.repositories.load_balancer.update(lock_session, id,
**db_lb_dict)
# Force SQL alchemy to query the DB, otherwise we get inconsistent
# results
context.session.expire_all()
db_lb = self._get_db_lb(context.session, id)
result = self._convert_db_to_type(db_lb, lb_types.LoadBalancerResponse)
return lb_types.LoadBalancerRootResponse(loadbalancer=result)
@wsme_pecan.wsexpose(None, wtypes.text, wtypes.text, status_code=204)
def delete(self, id, cascade=False):
"""Deletes a load balancer."""
context = pecan_request.context.get('octavia_context')
cascade = strutils.bool_from_string(cascade)
db_lb = self._get_db_lb(context.session, id, show_deleted=False)
self._auth_validate_action(context, db_lb.project_id,
constants.RBAC_DELETE)
# Load the driver early as it also provides validation
driver = driver_factory.get_driver(db_lb.provider)
with db_api.get_lock_session() as lock_session:
if (db_lb.listeners or db_lb.pools) and not cascade:
msg = _("Cannot delete Load Balancer %s - "
"it has children") % id
LOG.warning(msg)
raise exceptions.ValidationException(detail=msg)
self._test_lb_status(lock_session, id,
lb_status=constants.PENDING_DELETE)
LOG.info("Sending delete Load Balancer %s to provider %s",
id, driver.name)
provider_loadbalancer = (
driver_utils.db_loadbalancer_to_provider_loadbalancer(
db_lb, for_delete=True))
driver_utils.call_provider(driver.name, driver.loadbalancer_delete,
provider_loadbalancer, cascade)
@pecan_expose()
def _lookup(self, id, *remainder):
"""Overridden pecan _lookup method for custom routing.
Currently it checks if this was a status request and routes
the request to the StatusController.
'statuses' is aliased here for backward compatibility with
neutron-lbaas LBaaS v2 API.
"""
is_children = (
id and remainder and (
remainder[0] == 'status' or remainder[0] == 'statuses' or (
remainder[0] == 'stats' or remainder[0] == 'failover'
)
)
)
if is_children:
controller = remainder[0]
remainder = remainder[1:]
if controller in ('status', 'statuses'):
return StatusController(lb_id=id), remainder
if controller == 'stats':
return StatisticsController(lb_id=id), remainder
if controller == 'failover':
return FailoverController(lb_id=id), remainder
return None
class StatusController(base.BaseController):
RBAC_TYPE = constants.RBAC_LOADBALANCER
def __init__(self, lb_id):
super(StatusController, self).__init__()
self.id = lb_id
@wsme_pecan.wsexpose(lb_types.StatusRootResponse, wtypes.text,
status_code=200)
def get(self):
context = pecan_request.context.get('octavia_context')
load_balancer = self._get_db_lb(context.session, self.id,
show_deleted=False)
if not load_balancer:
LOG.info("Load balancer %s not found.", id)
raise exceptions.NotFound(
resource=data_models.LoadBalancer._name(),
id=id)
self._auth_validate_action(context, load_balancer.project_id,
constants.RBAC_GET_STATUS)
result = self._convert_db_to_type(
load_balancer, lb_types.LoadBalancerStatusResponse)
result = lb_types.StatusResponse(loadbalancer=result)
return lb_types.StatusRootResponse(statuses=result)
class StatisticsController(base.BaseController, stats.StatsMixin):
RBAC_TYPE = constants.RBAC_LOADBALANCER
def __init__(self, lb_id):
super(StatisticsController, self).__init__()
self.id = lb_id
@wsme_pecan.wsexpose(lb_types.StatisticsRootResponse, wtypes.text,
status_code=200)
def get(self):
context = pecan_request.context.get('octavia_context')
load_balancer = self._get_db_lb(context.session, self.id,
show_deleted=False)
if not load_balancer:
LOG.info("Load balancer %s not found.", id)
raise exceptions.NotFound(
resource=data_models.LoadBalancer._name(),
id=id)
self._auth_validate_action(context, load_balancer.project_id,
constants.RBAC_GET_STATS)
lb_stats = self.get_loadbalancer_stats(context.session, self.id)
result = self._convert_db_to_type(
lb_stats, lb_types.LoadBalancerStatisticsResponse)
return lb_types.StatisticsRootResponse(stats=result)
class FailoverController(LoadBalancersController):
def __init__(self, lb_id):
super(FailoverController, self).__init__()
self.lb_id = lb_id
@wsme_pecan.wsexpose(None, wtypes.text, status_code=202)
def put(self, **kwargs):
"""Fails over a loadbalancer"""
context = pecan_request.context.get('octavia_context')
db_lb = self._get_db_lb(context.session, self.lb_id,
show_deleted=False)
self._auth_validate_action(context, db_lb.project_id,
constants.RBAC_PUT_FAILOVER)
# Load the driver early as it also provides validation
driver = driver_factory.get_driver(db_lb.provider)
with db_api.get_lock_session() as lock_session:
self._test_and_set_failover_prov_status(lock_session, self.lb_id)
LOG.info("Sending failover request for load balancer %s to the "
"provider %s", self.lb_id, driver.name)
driver_utils.call_provider(
driver.name, driver.loadbalancer_failover, self.lb_id)