# octavia.controller.worker.v2.flows.pool_flows

# Source code for octavia.controller.worker.v2.flows.pool_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.v2.tasks import amphora_driver_tasks
    from octavia.controller.worker.v2.tasks import database_tasks
    from octavia.controller.worker.v2.tasks import lifecycle_tasks

    class PoolFlows(object):

        def get_create_pool_flow(self):
            """Create a flow to create a pool

            :returns: The flow for creating a pool
            """
            create_pool_flow = linear_flow.Flow(constants.CREATE_POOL_FLOW)
            create_pool_flow.add(lifecycle_tasks.PoolToErrorOnRevertTask(
                requires=[constants.POOL_ID,
                          constants.LISTENERS,
                          constants.LOADBALANCER]))
            create_pool_flow.add(database_tasks.MarkPoolPendingCreateInDB(
                requires=constants.POOL_ID))
            create_pool_flow.add(amphora_driver_tasks.ListenersUpdate(
                requires=constants.LOADBALANCER_ID))
            create_pool_flow.add(database_tasks.MarkPoolActiveInDB(
                requires=constants.POOL_ID))
            create_pool_flow.add(database_tasks.MarkLBAndListenersActiveInDB(
                requires=(constants.LOADBALANCER_ID, constants.LISTENERS)))

            return create_pool_flow

        def get_delete_pool_flow(self):
            """Create a flow to delete a pool

            :returns: The flow for deleting a pool
            """
            delete_pool_flow = linear_flow.Flow(constants.DELETE_POOL_FLOW)
            delete_pool_flow.add(lifecycle_tasks.PoolToErrorOnRevertTask(
                requires=[constants.POOL_ID,
                          constants.LISTENERS,
                          constants.LOADBALANCER]))
            delete_pool_flow.add(database_tasks.MarkPoolPendingDeleteInDB(
                requires=constants.POOL_ID))
            delete_pool_flow.add(database_tasks.CountPoolChildrenForQuota(
                requires=constants.POOL_ID, provides=constants.POOL_CHILD_COUNT))
            delete_pool_flow.add(amphora_driver_tasks.ListenersUpdate(
                requires=constants.LOADBALANCER_ID))
            delete_pool_flow.add(database_tasks.DeletePoolInDB(
                requires=constants.POOL_ID))
            delete_pool_flow.add(database_tasks.DecrementPoolQuota(
                requires=[constants.PROJECT_ID, constants.POOL_CHILD_COUNT]))
            delete_pool_flow.add(database_tasks.MarkLBAndListenersActiveInDB(
                requires=(constants.LOADBALANCER_ID, constants.LISTENERS)))

            return delete_pool_flow

        def get_delete_pool_flow_internal(self, pool_id):
            """Create a flow to delete a pool, etc.

            :returns: The flow for deleting a pool
            """
            delete_pool_flow = linear_flow.Flow(constants.DELETE_POOL_FLOW + '-' +
                                                pool_id)
            # health monitor should cascade
            # members should cascade
            delete_pool_flow.add(database_tasks.MarkPoolPendingDeleteInDB(
                name='mark_pool_pending_delete_in_db_' + pool_id,
                requires=constants.POOL_ID,
                inject={constants.POOL_ID: pool_id}))
            delete_pool_flow.add(database_tasks.CountPoolChildrenForQuota(
                name='count_pool_children_for_quota_' + pool_id,
                requires=constants.POOL_ID,
                provides=constants.POOL_CHILD_COUNT,
                inject={constants.POOL_ID: pool_id}))
            delete_pool_flow.add(database_tasks.DeletePoolInDB(
                name='delete_pool_in_db_' + pool_id,
                requires=constants.POOL_ID,
                inject={constants.POOL_ID: pool_id}))
            delete_pool_flow.add(database_tasks.DecrementPoolQuota(
                name='decrement_pool_quota_' + pool_id,
                requires=[constants.PROJECT_ID, constants.POOL_CHILD_COUNT]))

            return delete_pool_flow

        def get_update_pool_flow(self):
            """Create a flow to update a pool

            :returns: The flow for updating a pool
            """
            update_pool_flow = linear_flow.Flow(constants.UPDATE_POOL_FLOW)
            update_pool_flow.add(lifecycle_tasks.PoolToErrorOnRevertTask(
                requires=[constants.POOL_ID,
                          constants.LISTENERS,
                          constants.LOADBALANCER]))
            update_pool_flow.add(database_tasks.MarkPoolPendingUpdateInDB(
                requires=constants.POOL_ID))
            update_pool_flow.add(amphora_driver_tasks.ListenersUpdate(
                requires=constants.LOADBALANCER_ID))
            update_pool_flow.add(database_tasks.UpdatePoolInDB(
                requires=[constants.POOL_ID, constants.UPDATE_DICT]))
            update_pool_flow.add(database_tasks.MarkPoolActiveInDB(
                requires=constants.POOL_ID))
            update_pool_flow.add(database_tasks.MarkLBAndListenersActiveInDB(
                requires=(constants.LOADBALANCER_ID, constants.LISTENERS)))

            return update_pool_flow

this page last updated: 2025-07-16 18:40:57

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