# octavia.api.v2.controllers.amphora

# Source code for octavia.api.v2.controllers.amphora

    #    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 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__)

    class AmphoraController(base.BaseController):
        RBAC_TYPE = constants.RBAC_AMPHORA

        def __init__(self):
            super(AmphoraController, self).__init__()

        @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')
            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)

        @wsme_pecan.wsexpose(amp_types.AmphoraeRootResponse, [wtypes.text],
                             ignore_extra_args=True)
        def get_all(self, fields=None):
            """Gets all health monitors."""
            pcontext = pecan_request.context
            context = pcontext.get('octavia_context')

            self._auth_validate_action(context, context.project_id,
                                       constants.RBAC_GET_ALL)

            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)

        @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

    class FailoverController(base.BaseController):
        RBAC_TYPE = constants.RBAC_AMPHORA

        def __init__(self, amp_id):
            super(FailoverController, self).__init__()
            if CONF.api_settings.default_provider_driver == constants.AMPHORAV2:
                topic = constants.TOPIC_AMPHORA_V2
                version = "2.0"
            else:
                topic = cfg.CONF.oslo_messaging.topic
                version = "1.0"
            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

        @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')
            db_amp = self._get_db_amp(context.session, self.amp_id,
                                      show_deleted=False)

            # Check to see if the amphora is a spare (not associated with an LB)
            if db_amp.load_balancer:
                self._auth_validate_action(
                    context, db_amp.load_balancer.project_id,
                    constants.RBAC_PUT_FAILOVER)

                self.repositories.load_balancer.test_and_set_provisioning_status(
                    context.session, db_amp.load_balancer_id,
                    status=constants.PENDING_UPDATE, raise_exception=True)
            else:
                self._auth_validate_action(
                    context, context.project_id, constants.RBAC_PUT_FAILOVER)

            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)

    class AmphoraUpdateController(base.BaseController):
        RBAC_TYPE = constants.RBAC_AMPHORA

        def __init__(self, amp_id):
            super(AmphoraUpdateController, self).__init__()

            if CONF.api_settings.default_provider_driver == constants.AMPHORAV2:
                topic = constants.TOPIC_AMPHORA_V2
                version = "2.0"
            else:
                topic = cfg.CONF.oslo_messaging.topic
                version = "1.0"
            self.transport = messaging.get_rpc_transport(cfg.CONF)
            self.target = messaging.Target(
                namespace=constants.RPC_NAMESPACE_CONTROLLER_AGENT,
                topic=topic, version=version, fanout=False)
            self.client = messaging.RPCClient(self.transport, target=self.target)
            self.amp_id = amp_id

        @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')
            db_amp = self._get_db_amp(context.session, self.amp_id,
                                      show_deleted=False)

            # Check to see if the amphora is a spare (not associated with an LB)
            if db_amp.load_balancer:
                self._auth_validate_action(
                    context, db_amp.load_balancer.project_id,
                    constants.RBAC_PUT_CONFIG)
            else:
                self._auth_validate_action(
                    context, context.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)

    class AmphoraStatsController(base.BaseController):
        RBAC_TYPE = constants.RBAC_AMPHORA

        def __init__(self, amp_id):
            super(AmphoraStatsController, self).__init__()
            self.amp_id = amp_id

        @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)

            stats = self.repositories.get_amphora_stats(context.session,
                                                        self.amp_id)
            if 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)

this page last updated: 2020-04-10 18:17:54

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