# octavia.controller.worker.v1.flows.listener_flows

# Source code for octavia.controller.worker.v1.flows.listener_flows

    # Copyright 2015 Hewlett-Packard Development Company, L.P.
    #
    # 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 taskflow.patterns import linear_flow

    from octavia.common import constants
    from octavia.controller.worker.v1.tasks import amphora_driver_tasks
    from octavia.controller.worker.v1.tasks import database_tasks
    from octavia.controller.worker.v1.tasks import lifecycle_tasks
    from octavia.controller.worker.v1.tasks import network_tasks

    class ListenerFlows(object):

        def get_create_listener_flow(self):
            """Create a flow to create a listener

            :returns: The flow for creating a listener
            """
            create_listener_flow = linear_flow.Flow(constants.CREATE_LISTENER_FLOW)
            create_listener_flow.add(lifecycle_tasks.ListenersToErrorOnRevertTask(
                requires=[constants.LOADBALANCER, constants.LISTENERS]))
            create_listener_flow.add(amphora_driver_tasks.ListenersUpdate(
                requires=constants.LOADBALANCER))
            create_listener_flow.add(network_tasks.UpdateVIP(
                requires=constants.LOADBALANCER))
            create_listener_flow.add(database_tasks.
                                     MarkLBAndListenersActiveInDB(
                                         requires=[constants.LOADBALANCER,
                                                   constants.LISTENERS]))
            return create_listener_flow

        def get_create_all_listeners_flow(self):
            """Create a flow to create all listeners

            :returns: The flow for creating all listeners
            """
            create_all_listeners_flow = linear_flow.Flow(
                constants.CREATE_LISTENERS_FLOW)
            create_all_listeners_flow.add(
                database_tasks.GetListenersFromLoadbalancer(
                    requires=constants.LOADBALANCER,
                    provides=constants.LISTENERS))
            create_all_listeners_flow.add(database_tasks.ReloadLoadBalancer(
                requires=constants.LOADBALANCER_ID,
                provides=constants.LOADBALANCER))
            create_all_listeners_flow.add(amphora_driver_tasks.ListenersUpdate(
                requires=constants.LOADBALANCER))
            create_all_listeners_flow.add(network_tasks.UpdateVIP(
                requires=constants.LOADBALANCER))
            return create_all_listeners_flow

        def get_delete_listener_flow(self):
            """Create a flow to delete a listener

            :returns: The flow for deleting a listener
            """
            delete_listener_flow = linear_flow.Flow(constants.DELETE_LISTENER_FLOW)
            delete_listener_flow.add(lifecycle_tasks.ListenerToErrorOnRevertTask(
                requires=constants.LISTENER))
            delete_listener_flow.add(amphora_driver_tasks.ListenerDelete(
                requires=constants.LISTENER))
            delete_listener_flow.add(network_tasks.UpdateVIPForDelete(
                requires=constants.LOADBALANCER))
            delete_listener_flow.add(database_tasks.DeleteListenerInDB(
                requires=constants.LISTENER))
            delete_listener_flow.add(database_tasks.DecrementListenerQuota(
                requires=constants.LISTENER))
            delete_listener_flow.add(database_tasks.MarkLBActiveInDB(
                requires=constants.LOADBALANCER))

            return delete_listener_flow

        def get_delete_listener_internal_flow(self, listener_name):
            """Create a flow to delete a listener and l7policies internally

               (will skip deletion on the amp and marking LB active)

            :returns: The flow for deleting a listener
            """
            delete_listener_flow = linear_flow.Flow(constants.DELETE_LISTENER_FLOW)
            # Should cascade delete all L7 policies
            delete_listener_flow.add(network_tasks.UpdateVIPForDelete(
                name='delete_update_vip_' + listener_name,
                requires=constants.LOADBALANCER))
            delete_listener_flow.add(database_tasks.DeleteListenerInDB(
                name='delete_listener_in_db_' + listener_name,
                requires=constants.LISTENER,
                rebind={constants.LISTENER: listener_name}))
            delete_listener_flow.add(database_tasks.DecrementListenerQuota(
                name='decrement_listener_quota_' + listener_name,
                requires=constants.LISTENER,
                rebind={constants.LISTENER: listener_name}))

            return delete_listener_flow

        def get_update_listener_flow(self):
            """Create a flow to update a listener

            :returns: The flow for updating a listener
            """
            update_listener_flow = linear_flow.Flow(constants.UPDATE_LISTENER_FLOW)
            update_listener_flow.add(lifecycle_tasks.ListenersToErrorOnRevertTask(
                requires=[constants.LOADBALANCER, constants.LISTENERS]))
            update_listener_flow.add(amphora_driver_tasks.ListenersUpdate(
                requires=constants.LOADBALANCER))
            update_listener_flow.add(network_tasks.UpdateVIP(
                requires=constants.LOADBALANCER))
            update_listener_flow.add(database_tasks.UpdateListenerInDB(
                requires=[constants.LISTENER, constants.UPDATE_DICT]))
            update_listener_flow.add(database_tasks.
                                     MarkLBAndListenersActiveInDB(
                                         requires=[constants.LOADBALANCER,
                                                   constants.LISTENERS]))

            return update_listener_flow

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

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