Load Balancing as a Service (LBaaS) for OpenStack
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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 pecan import expose as pecan_expose
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.controllers import l7policy
from octavia.api.v2.types import listener as listener_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 as common_utils
from octavia.common import validate
from octavia.db import api as db_api
from octavia.db import prepare as db_prepare
from octavia.i18n import _
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
class ListenersController(base.BaseController):
RBAC_TYPE = constants.RBAC_LISTENER
def __init__(self):
super(ListenersController, self).__init__()
@wsme_pecan.wsexpose(listener_types.ListenerRootResponse, wtypes.text,
[wtypes.text], ignore_extra_args=True)
def get_one(self, id, fields=None):
"""Gets a single listener's details."""
context = pecan_request.context.get('octavia_context')
db_listener = self._get_db_listener(context.session, id,
show_deleted=False)
if not db_listener:
raise exceptions.NotFound(resource=data_models.Listener._name(),
id=id)
self._auth_validate_action(context, db_listener.project_id,
constants.RBAC_GET_ONE)
result = self._convert_db_to_type(db_listener,
listener_types.ListenerResponse)
if fields is not None:
result = self._filter_fields([result], fields)[0]
return listener_types.ListenerRootResponse(listener=result)
@wsme_pecan.wsexpose(listener_types.ListenersRootResponse, wtypes.text,
[wtypes.text], ignore_extra_args=True)
def get_all(self, project_id=None, fields=None):
"""Lists all listeners."""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
query_filter = self._auth_get_all(context, project_id)
db_listeners, links = self.repositories.listener.get_all_API_list(
context.session, show_deleted=False,
pagination_helper=pcontext.get(constants.PAGINATION_HELPER),
**query_filter)
result = self._convert_db_to_type(
db_listeners, [listener_types.ListenerResponse])
if fields is not None:
result = self._filter_fields(result, fields)
return listener_types.ListenersRootResponse(
listeners=result, listeners_links=links)
def _test_lb_and_listener_statuses(
self, session, lb_id, id=None,
listener_status=constants.PENDING_UPDATE):
"""Verify load balancer is in a mutable state."""
lb_repo = self.repositories.load_balancer
if id:
if not self.repositories.test_and_set_lb_and_listeners_prov_status(
session, lb_id, constants.PENDING_UPDATE,
listener_status, listener_ids=[id]):
LOG.info("Load Balancer %s is immutable.", lb_id)
db_lb = lb_repo.get(session, id=lb_id)
raise exceptions.ImmutableObject(resource=db_lb._name(),
id=lb_id)
else:
if not lb_repo.test_and_set_provisioning_status(
session, lb_id, constants.PENDING_UPDATE):
db_lb = lb_repo.get(session, id=lb_id)
LOG.info("Load Balancer %s is immutable.", db_lb.id)
raise exceptions.ImmutableObject(resource=db_lb._name(),
id=lb_id)
def _validate_pool(self, session, lb_id, pool_id, listener_protocol):
"""Validate pool given exists on same load balancer as listener."""
db_pool = self.repositories.pool.get(
session, load_balancer_id=lb_id, id=pool_id)
if not db_pool:
raise exceptions.NotFound(
resource=data_models.Pool._name(), id=pool_id)
self._validate_protocol(listener_protocol, db_pool.protocol)
def _has_tls_container_refs(self, listener_dict):
return (listener_dict.get('tls_certificate_id') or
listener_dict.get('client_ca_tls_container_id') or
listener_dict.get('sni_containers'))
def _is_tls_or_insert_header(self, listener_dict):
return (self._has_tls_container_refs(listener_dict) or
listener_dict.get('insert_headers'))
def _validate_insert_headers(self, insert_header_list, listener_protocol):
if list(set(insert_header_list) - (
set(constants.SUPPORTED_HTTP_HEADERS +
constants.SUPPORTED_SSL_HEADERS))):
raise exceptions.InvalidOption(
value=insert_header_list,
option='insert_headers')
if not listener_protocol == constants.PROTOCOL_TERMINATED_HTTPS:
is_matched = len(
constants.SUPPORTED_SSL_HEADERS) > len(
list(set(constants.SUPPORTED_SSL_HEADERS) - set(
insert_header_list)))
if is_matched:
headers = []
for header_name in insert_header_list:
if header_name in constants.SUPPORTED_SSL_HEADERS:
headers.append(header_name)
raise exceptions.InvalidOption(
value=headers,
option=('%s protocol listener.' % listener_protocol))
def _validate_cidr_compatible_with_vip(self, vip, allowed_cidrs):
for cidr in allowed_cidrs:
# Check if CIDR IP version matches VIP IP version
if common_utils.is_cidr_ipv6(cidr) != common_utils.is_ipv6(vip):
msg = _("CIDR %(cidr)s IP version incompatible with VIP "
"%(vip)s IP version.")
raise exceptions.ValidationException(
detail=msg % {'cidr': cidr, 'vip': vip})
def _validate_create_listener(self, lock_session, listener_dict):
"""Validate listener for wrong protocol or duplicate listeners
Update the load balancer db when provisioning status changes.
"""
listener_protocol = listener_dict.get('protocol')
if listener_dict and listener_dict.get('insert_headers'):
self._validate_insert_headers(
listener_dict['insert_headers'].keys(), listener_protocol)
# Check for UDP compatibility
if (listener_protocol == constants.PROTOCOL_UDP and
self._is_tls_or_insert_header(listener_dict)):
raise exceptions.ValidationException(detail=_(
"%s protocol listener does not support TLS or header "
"insertion.") % constants.PROTOCOL_UDP)
# Check for TLS disabled
if (not CONF.api_settings.allow_tls_terminated_listeners and
listener_protocol == constants.PROTOCOL_TERMINATED_HTTPS):
raise exceptions.DisabledOption(
value=constants.PROTOCOL_TERMINATED_HTTPS, option='protocol')
# Check for certs when not TERMINATED_HTTPS
if (listener_protocol != constants.PROTOCOL_TERMINATED_HTTPS and
self._has_tls_container_refs(listener_dict)):
raise exceptions.ValidationException(detail=_(
"Certificate container references are only allowed on "
"%s protocol listeners.") %
constants.PROTOCOL_TERMINATED_HTTPS)
# Make sure a base certificate exists if specifying a client ca
if (listener_dict.get('client_ca_tls_certificate_id') and
not (listener_dict.get('tls_certificate_id') or
listener_dict.get('sni_containers'))):
raise exceptions.ValidationException(detail=_(
"An SNI or default certificate container reference must "
"be provided with a client CA container reference."))
# Make sure a certificate container is specified for TERMINATED_HTTPS
if (listener_protocol == constants.PROTOCOL_TERMINATED_HTTPS and
not (listener_dict.get('tls_certificate_id') or
listener_dict.get('sni_containers'))):
raise exceptions.ValidationException(detail=_(
"An SNI or default certificate container reference must "
"be provided for %s protocol listeners.") %
constants.PROTOCOL_TERMINATED_HTTPS)
# Make sure we have a client CA cert if they enable client auth
if (listener_dict.get('client_authentication') !=
constants.CLIENT_AUTH_NONE and not
listener_dict.get('client_ca_tls_certificate_id')):
raise exceptions.ValidationException(detail=_(
"Client authentication setting %s requires a client CA "
"container reference.") %
listener_dict.get('client_authentication'))
# Make sure we have a client CA if they specify a CRL
if (listener_dict.get('client_crl_container_id') and
not listener_dict.get('client_ca_tls_certificate_id')):
raise exceptions.ValidationException(detail=_(
"A client authentication CA reference is required to "
"specify a client authentication revocation list."))
# Check TLS cipher prohibit list
if 'tls_ciphers' in listener_dict and listener_dict['tls_ciphers']:
rejected_ciphers = validate.check_cipher_prohibit_list(
listener_dict['tls_ciphers'])
if rejected_ciphers:
raise exceptions.ValidationException(detail=_(
'The following ciphers have been prohibited by an '
'administrator: ' + ', '.join(rejected_ciphers)))
# Validate the TLS containers
sni_containers = listener_dict.pop('sni_containers', [])
tls_refs = [sni['tls_container_id'] for sni in sni_containers]
if listener_dict.get('tls_certificate_id'):
tls_refs.append(listener_dict.get('tls_certificate_id'))
self._validate_tls_refs(tls_refs)
# Validate the client CA cert and optional client CRL
if listener_dict.get('client_ca_tls_certificate_id'):
self._validate_client_ca_and_crl_refs(
listener_dict.get('client_ca_tls_certificate_id'),
listener_dict.get('client_crl_container_id', None))
# Validate that the L4 protocol (UDP or TCP) is not already used for
# the specified protocol_port in this load balancer
pcontext = pecan_request.context
query_filter = {
'project_id': listener_dict['project_id'],
'load_balancer_id': listener_dict['load_balancer_id'],
'protocol_port': listener_dict['protocol_port']
}
# Get listeners on the same load balancer that use the same
# protocol port
db_listeners = self.repositories.listener.get_all_API_list(
lock_session, show_deleted=False,
pagination_helper=pcontext.get(constants.PAGINATION_HELPER),
**query_filter)[0]
if db_listeners:
l4_protocol = constants.L4_PROTOCOL_MAP[listener_protocol]
# List supported protocols that share the same L4 protocol as our
# new listener
disallowed_protocols = [
p
for p in constants.L4_PROTOCOL_MAP
if constants.L4_PROTOCOL_MAP[p] == l4_protocol
]
for db_l in db_listeners:
# Check if l4 protocol ports conflict
if db_l.protocol in disallowed_protocols:
raise exceptions.DuplicateListenerEntry(
protocol=db_l.protocol,
port=listener_dict.get('protocol_port'))
# Validate allowed CIDRs
allowed_cidrs = listener_dict.get('allowed_cidrs', []) or []
lb_id = listener_dict.get('load_balancer_id')
vip_db = self.repositories.vip.get(
lock_session, load_balancer_id=lb_id)
vip_address = vip_db.ip_address
self._validate_cidr_compatible_with_vip(vip_address, allowed_cidrs)
if listener_protocol == constants.PROTOCOL_TERMINATED_HTTPS:
# Validate TLS version list
validate.check_tls_version_list(listener_dict['tls_versions'])
# Validate TLS versions against minimum
validate.check_tls_version_min(listener_dict['tls_versions'])
try:
db_listener = self.repositories.listener.create(
lock_session, **listener_dict)
if sni_containers:
for container in sni_containers:
sni_dict = {'listener_id': db_listener.id,
'tls_container_id': container.get(
'tls_container_id')}
self.repositories.sni.create(lock_session, **sni_dict)
# DB listener needs to be refreshed
db_listener = self.repositories.listener.get(
lock_session, id=db_listener.id)
return db_listener
except odb_exceptions.DBDuplicateEntry as de:
column_list = ['load_balancer_id', 'protocol', 'protocol_port']
constraint_list = ['uq_listener_load_balancer_id_protocol_port']
if ['id'] == de.columns:
raise exceptions.IDAlreadyExists()
if (set(column_list) == set(de.columns) or
set(constraint_list) == set(de.columns)):
raise exceptions.DuplicateListenerEntry(
protocol=listener_dict.get('protocol'),
port=listener_dict.get('protocol_port'))
except odb_exceptions.DBError:
raise exceptions.InvalidOption(value=listener_dict.get('protocol'),
option='protocol')
@wsme_pecan.wsexpose(listener_types.ListenerRootResponse,
body=listener_types.ListenerRootPOST, status_code=201)
def post(self, listener_):
"""Creates a listener on a load balancer."""
listener = listener_.listener
context = pecan_request.context.get('octavia_context')
load_balancer_id = listener.loadbalancer_id
listener.project_id, provider = self._get_lb_project_id_provider(
context.session, load_balancer_id)
self._auth_validate_action(context, listener.project_id,
constants.RBAC_POST)
# 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.Listener,
listener.project_id):
raise exceptions.QuotaException(
resource=data_models.Listener._name())
listener_dict = db_prepare.create_listener(
listener.to_dict(render_unsets=True), None)
if listener_dict['default_pool_id']:
self._validate_pool(context.session, load_balancer_id,
listener_dict['default_pool_id'],
listener.protocol)
self._test_lb_and_listener_statuses(
lock_session, lb_id=load_balancer_id)
db_listener = self._validate_create_listener(
lock_session, listener_dict)
# Prepare the data for the driver data model
provider_listener = (
driver_utils.db_listener_to_provider_listener(db_listener))
# re-inject the sni container references lost due to SNI
# being a separate table in the DB
if listener.sni_container_refs != wtypes.Unset:
provider_listener.sni_container_refs = (
listener.sni_container_refs)
# Dispatch to the driver
LOG.info("Sending create Listener %s to provider %s",
db_listener.id, driver.name)
driver_utils.call_provider(
driver.name, driver.listener_create, provider_listener)
lock_session.commit()
except Exception:
with excutils.save_and_reraise_exception():
lock_session.rollback()
db_listener = self._get_db_listener(context.session, db_listener.id)
result = self._convert_db_to_type(db_listener,
listener_types.ListenerResponse)
return listener_types.ListenerRootResponse(listener=result)
def _graph_create(self, lock_session, listener_dict,
l7policies=None, pool_name_ids=None):
load_balancer_id = listener_dict['load_balancer_id']
listener_dict = db_prepare.create_listener(
listener_dict, load_balancer_id)
l7policies = listener_dict.pop('l7policies', l7policies)
if listener_dict.get('default_pool_id'):
self._validate_pool(lock_session, load_balancer_id,
listener_dict['default_pool_id'],
listener_dict['protocol'])
db_listener = self._validate_create_listener(
lock_session, listener_dict)
# Now create l7policies
new_l7ps = []
for l7p in l7policies:
l7p['project_id'] = db_listener.project_id
l7p['load_balancer_id'] = load_balancer_id
l7p['listener_id'] = db_listener.id
redirect_pool = l7p.pop('redirect_pool', None)
if redirect_pool:
pool_name = redirect_pool['name']
pool_id = pool_name_ids.get(pool_name)
if not pool_id:
raise exceptions.SingleCreateDetailsMissing(
type='Pool', name=pool_name)
l7p['redirect_pool_id'] = pool_id
new_l7ps.append(l7policy.L7PolicyController()._graph_create(
lock_session, l7p))
db_listener.l7policies = new_l7ps
return db_listener
def _validate_listener_PUT(self, listener, db_listener):
# TODO(rm_work): Do we need something like this? What do we do on an
# empty body for a PUT?
if not listener:
raise exceptions.ValidationException(
detail='No listener object supplied.')
# Check for UDP compatibility
if (db_listener.protocol == constants.PROTOCOL_UDP and
self._is_tls_or_insert_header(listener.to_dict())):
raise exceptions.ValidationException(detail=_(
"%s protocol listener does not support TLS or header "
"insertion.") % constants.PROTOCOL_UDP)
# Check for certs when not TERMINATED_HTTPS
if (db_listener.protocol != constants.PROTOCOL_TERMINATED_HTTPS and
self._has_tls_container_refs(listener.to_dict())):
raise exceptions.ValidationException(detail=_(
"Certificate container references are only allowed on "
"%s protocol listeners.") %
constants.PROTOCOL_TERMINATED_HTTPS)
# Make sure we have a client CA cert if they enable client auth
if ((listener.client_authentication != wtypes.Unset and
listener.client_authentication != constants.CLIENT_AUTH_NONE) and
not (db_listener.client_ca_tls_certificate_id or
listener.client_ca_tls_container_ref)):
raise exceptions.ValidationException(detail=_(
"Client authentication setting %s requires a client CA "
"container reference.") %
listener.client_authentication)
if listener.insert_headers:
self._validate_insert_headers(
list(listener.insert_headers.keys()), db_listener.protocol)
sni_containers = listener.sni_container_refs or []
tls_refs = list(sni_containers)
if listener.default_tls_container_ref:
tls_refs.append(listener.default_tls_container_ref)
self._validate_tls_refs(tls_refs)
ca_ref = None
if (listener.client_ca_tls_container_ref and
listener.client_ca_tls_container_ref != wtypes.Unset):
ca_ref = listener.client_ca_tls_container_ref
elif db_listener.client_ca_tls_certificate_id:
ca_ref = db_listener.client_ca_tls_certificate_id
crl_ref = None
if (listener.client_crl_container_ref and
listener.client_crl_container_ref != wtypes.Unset):
crl_ref = listener.client_crl_container_ref
elif db_listener.client_crl_container_id:
crl_ref = db_listener.client_crl_container_id
if crl_ref and not ca_ref:
raise exceptions.ValidationException(detail=_(
"A client authentication CA reference is required to "
"specify a client authentication revocation list."))
if ca_ref or crl_ref:
self._validate_client_ca_and_crl_refs(ca_ref, crl_ref)
# Validate allowed CIDRs
if (listener.allowed_cidrs and listener.allowed_cidrs != wtypes.Unset):
vip_address = db_listener.load_balancer.vip.ip_address
self._validate_cidr_compatible_with_vip(
vip_address, listener.allowed_cidrs)
# Check TLS cipher prohibit list
if listener.tls_ciphers:
rejected_ciphers = validate.check_cipher_prohibit_list(
listener.tls_ciphers)
if rejected_ciphers:
raise exceptions.ValidationException(detail=_(
'The following ciphers have been prohibited by an '
'administrator: ' + ', '.join(rejected_ciphers)))
if listener.tls_versions is not wtypes.Unset:
# Validate TLS version list
validate.check_tls_version_list(listener.tls_versions)
# Validate TLS versions against minimum
validate.check_tls_version_min(listener.tls_versions)
def _set_default_on_none(self, listener):
"""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 listener.connection_limit is None:
listener.connection_limit = constants.DEFAULT_CONNECTION_LIMIT
if listener.timeout_client_data is None:
listener.timeout_client_data = (
CONF.haproxy_amphora.timeout_client_data)
if listener.timeout_member_connect is None:
listener.timeout_member_connect = (
CONF.haproxy_amphora.timeout_member_connect)
if listener.timeout_member_data is None:
listener.timeout_member_data = (
CONF.haproxy_amphora.timeout_member_data)
if listener.timeout_tcp_inspect is None:
listener.timeout_tcp_inspect = (
CONF.haproxy_amphora.timeout_tcp_inspect)
if listener.client_authentication is None:
listener.client_authentication = constants.CLIENT_AUTH_NONE
@wsme_pecan.wsexpose(listener_types.ListenerRootResponse, wtypes.text,
body=listener_types.ListenerRootPUT, status_code=200)
def put(self, id, listener_):
"""Updates a listener on a load balancer."""
listener = listener_.listener
context = pecan_request.context.get('octavia_context')
db_listener = self._get_db_listener(context.session, id,
show_deleted=False)
load_balancer_id = db_listener.load_balancer_id
project_id, provider = self._get_lb_project_id_provider(
context.session, load_balancer_id)
self._auth_validate_action(context, project_id, constants.RBAC_PUT)
self._validate_listener_PUT(listener, db_listener)
self._set_default_on_none(listener)
if listener.default_pool_id:
self._validate_pool(context.session, load_balancer_id,
listener.default_pool_id, db_listener.protocol)
# 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_and_listener_statuses(lock_session,
load_balancer_id, id=id)
# Prepare the data for the driver data model
listener_dict = listener.to_dict(render_unsets=False)
listener_dict['id'] = id
provider_listener_dict = (
driver_utils.listener_dict_to_provider_dict(listener_dict))
# Also prepare the baseline object data
old_provider_listener = (
driver_utils.db_listener_to_provider_listener(db_listener,
for_delete=True))
# Dispatch to the driver
LOG.info("Sending update Listener %s to provider %s", id,
driver.name)
driver_utils.call_provider(
driver.name, driver.listener_update,
old_provider_listener,
driver_dm.Listener.from_dict(provider_listener_dict))
# Update the database to reflect what the driver just accepted
self.repositories.listener.update(
lock_session, id, **listener.to_dict(render_unsets=False))
# Force SQL alchemy to query the DB, otherwise we get inconsistent
# results
context.session.expire_all()
db_listener = self._get_db_listener(context.session, id)
result = self._convert_db_to_type(db_listener,
listener_types.ListenerResponse)
return listener_types.ListenerRootResponse(listener=result)
@wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
def delete(self, id):
"""Deletes a listener from a load balancer."""
context = pecan_request.context.get('octavia_context')
db_listener = self._get_db_listener(context.session, id,
show_deleted=False)
load_balancer_id = db_listener.load_balancer_id
project_id, provider = self._get_lb_project_id_provider(
context.session, load_balancer_id)
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 db_api.get_lock_session() as lock_session:
self._test_lb_and_listener_statuses(
lock_session, load_balancer_id,
id=id, listener_status=constants.PENDING_DELETE)
LOG.info("Sending delete Listener %s to provider %s", id,
driver.name)
provider_listener = (
driver_utils.db_listener_to_provider_listener(
db_listener, for_delete=True))
driver_utils.call_provider(driver.name, driver.listener_delete,
provider_listener)
@pecan_expose()
def _lookup(self, id, *remainder):
"""Overridden pecan _lookup method for custom routing.
Currently it checks if this was a stats request and routes
the request to the StatsController.
"""
if id and remainder and remainder[0] == 'stats':
return StatisticsController(listener_id=id), remainder[1:]
return None
class StatisticsController(base.BaseController, stats.StatsMixin):
RBAC_TYPE = constants.RBAC_LISTENER
def __init__(self, listener_id):
super(StatisticsController, self).__init__()
self.id = listener_id
@wsme_pecan.wsexpose(listener_types.StatisticsRootResponse, wtypes.text,
status_code=200)
def get(self):
context = pecan_request.context.get('octavia_context')
db_listener = self._get_db_listener(context.session, self.id,
show_deleted=False)
if not db_listener:
LOG.info("Listener %s not found.", id)
raise exceptions.NotFound(
resource=data_models.Listener._name(),
id=id)
self._auth_validate_action(context, db_listener.project_id,
constants.RBAC_GET_STATS)
listener_stats = self.get_listener_stats(context.session, self.id)
result = self._convert_db_to_type(
listener_stats, listener_types.ListenerStatisticsResponse)
return listener_types.StatisticsRootResponse(stats=result)