# 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 oslo_config import cfg
from oslo_log import log as logging
import oslo_messaging as messaging
from oslo_utils import excutils
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.v2.controllers import base
from octavia.api.v2.types import amphora as amp_types
from octavia.common import constants
from octavia.common import exceptions
from octavia.common import rpc
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
[docs]
class AmphoraController(base.BaseController):
RBAC_TYPE = constants.RBAC_AMPHORA
def __init__(self):
super().__init__()
topic = cfg.CONF.oslo_messaging.topic
self.target = messaging.Target(
namespace=constants.RPC_NAMESPACE_CONTROLLER_AGENT,
topic=topic, version="1.0", fanout=False)
self.client = rpc.get_client(self.target)
[docs]
@wsme_pecan.wsexpose(amp_types.AmphoraRootResponse, wtypes.text,
[wtypes.text], ignore_extra_args=True)
def get_one(self, id, fields=None):
"""Gets a single amphora's details."""
context = pecan_request.context.get('octavia_context')
with context.session.begin():
db_amp = self._get_db_amp(context.session, id, show_deleted=False)
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ONE)
result = self._convert_db_to_type(
db_amp, amp_types.AmphoraResponse)
if fields is not None:
result = self._filter_fields([result], fields)[0]
return amp_types.AmphoraRootResponse(amphora=result)
[docs]
@wsme_pecan.wsexpose(amp_types.AmphoraeRootResponse, [wtypes.text],
ignore_extra_args=True)
def get_all(self, fields=None):
"""Gets all amphorae."""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ALL)
with context.session.begin():
db_amp, links = self.repositories.amphora.get_all_API_list(
context.session, show_deleted=False,
pagination_helper=pcontext.get(constants.PAGINATION_HELPER))
result = self._convert_db_to_type(
db_amp, [amp_types.AmphoraResponse])
if fields is not None:
result = self._filter_fields(result, fields)
return amp_types.AmphoraeRootResponse(
amphorae=result, amphorae_links=links)
[docs]
@wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
def delete(self, id):
"""Deletes an amphora."""
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_DELETE)
with context.session.begin():
try:
self.repositories.amphora.test_and_set_status_for_delete(
context.session, id)
except sa_exception.NoResultFound as e:
raise exceptions.NotFound(resource='Amphora', id=id) from e
LOG.info("Sending delete amphora %s to the queue.", id)
payload = {constants.AMPHORA_ID: id}
self.client.cast({}, 'delete_amphora', **payload)
@pecan_expose()
def _lookup(self, amphora_id, *remainder):
"""Overridden pecan _lookup method for custom routing.
Currently it checks if this was a failover request and routes
the request to the FailoverController.
"""
if amphora_id and remainder:
controller = remainder[0]
remainder = remainder[1:]
if controller == 'config':
return AmphoraUpdateController(amp_id=amphora_id), remainder
if controller == 'failover':
return FailoverController(amp_id=amphora_id), remainder
if controller == 'stats':
return AmphoraStatsController(amp_id=amphora_id), remainder
return None
[docs]
class FailoverController(base.BaseController):
RBAC_TYPE = constants.RBAC_AMPHORA
def __init__(self, amp_id):
super().__init__()
topic = constants.TOPIC_AMPHORA_V2
version = "2.0"
self.target = messaging.Target(
namespace=constants.RPC_NAMESPACE_CONTROLLER_AGENT,
topic=topic, version=version, fanout=False)
self.client = rpc.get_client(self.target)
self.amp_id = amp_id
[docs]
@wsme_pecan.wsexpose(None, wtypes.text, status_code=202)
def put(self):
"""Fails over an amphora"""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
with context.session.begin():
db_amp = self._get_db_amp(context.session, self.amp_id,
show_deleted=False)
self._auth_validate_action(
context, db_amp.load_balancer.project_id,
constants.RBAC_PUT_FAILOVER)
with context.session.begin():
self.repositories.load_balancer.test_and_set_provisioning_status(
context.session, db_amp.load_balancer_id,
status=constants.PENDING_UPDATE, raise_exception=True)
try:
LOG.info("Sending failover request for amphora %s to the "
"queue", self.amp_id)
payload = {constants.AMPHORA_ID: db_amp.id}
self.client.cast({}, 'failover_amphora', **payload)
except Exception:
with excutils.save_and_reraise_exception(reraise=False):
self.repositories.load_balancer.update(
context.session, db_amp.load_balancer.id,
provisioning_status=constants.ERROR)
[docs]
class AmphoraUpdateController(base.BaseController):
RBAC_TYPE = constants.RBAC_AMPHORA
def __init__(self, amp_id):
super().__init__()
topic = constants.TOPIC_AMPHORA_V2
version = "2.0"
self.target = messaging.Target(
namespace=constants.RPC_NAMESPACE_CONTROLLER_AGENT,
topic=topic, version=version, fanout=False)
self.client = rpc.get_client(self.target)
self.amp_id = amp_id
[docs]
@wsme_pecan.wsexpose(None, wtypes.text, status_code=202)
def put(self):
"""Update amphora agent configuration"""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
with context.session.begin():
db_amp = self._get_db_amp(context.session, self.amp_id,
show_deleted=False)
self._auth_validate_action(
context, db_amp.load_balancer.project_id,
constants.RBAC_PUT_CONFIG)
try:
LOG.info("Sending amphora agent update request for amphora %s to "
"the queue.", self.amp_id)
payload = {constants.AMPHORA_ID: db_amp.id}
self.client.cast({}, 'update_amphora_agent_config', **payload)
except Exception:
with excutils.save_and_reraise_exception(reraise=True):
LOG.error("Unable to send amphora agent update request for "
"amphora %s to the queue.", self.amp_id)
[docs]
class AmphoraStatsController(base.BaseController):
RBAC_TYPE = constants.RBAC_AMPHORA
def __init__(self, amp_id):
super().__init__()
self.amp_id = amp_id
[docs]
@wsme_pecan.wsexpose(amp_types.StatisticsRootResponse, wtypes.text,
status_code=200)
def get(self):
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_STATS)
with context.session.begin():
stats = self.repositories.get_amphora_stats(context.session,
self.amp_id)
if not stats:
raise exceptions.NotFound(resource='Amphora stats for',
id=self.amp_id)
wsme_stats = []
for stat in stats:
wsme_stats.append(amp_types.AmphoraStatisticsResponse(**stat))
return amp_types.StatisticsRootResponse(amphora_stats=wsme_stats)
