58 lines
2.5 KiB
Python
58 lines
2.5 KiB
Python
# Copyright 2019 VMware, Inc.
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# All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from neutron_lib import exceptions as n_exc
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from oslo_log import helpers as log_helpers
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from vmware_nsx._i18n import _
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from vmware_nsx.services.lbaas import lb_const
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@log_helpers.log_method_call
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def validate_session_persistence(pool, listener, completor, old_pool=None):
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sp = pool.get('session_persistence')
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if not listener or not sp:
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# safety first!
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return
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# L4 listeners only allow source IP persistence
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if (listener['protocol'] == lb_const.LB_PROTOCOL_TCP and
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sp['type'] != lb_const.LB_SESSION_PERSISTENCE_SOURCE_IP):
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completor(success=False)
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msg = (_("Invalid session persistence type %(sp_type)s for "
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"pool on listener %(lst_id)s with %(proto)s protocol") %
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{'sp_type': sp['type'],
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'lst_id': listener['id'],
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'proto': listener['protocol']})
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raise n_exc.BadRequest(resource='lbaas-pool', msg=msg)
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# Cannot switch (yet) on update from source IP to cookie based, and
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# vice versa
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cookie_pers_types = (lb_const.LB_SESSION_PERSISTENCE_HTTP_COOKIE,
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lb_const.LB_SESSION_PERSISTENCE_APP_COOKIE)
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if old_pool:
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oldsp = old_pool.get('session_persistence')
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if not oldsp:
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return
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if ((sp['type'] == lb_const.LB_SESSION_PERSISTENCE_SOURCE_IP and
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oldsp['type'] in cookie_pers_types) or
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(sp['type'] in cookie_pers_types and
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oldsp['type'] == lb_const.LB_SESSION_PERSISTENCE_SOURCE_IP)):
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completor(success=False)
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msg = (_("Cannot update session persistence type to "
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"%(sp_type)s for pool on listener %(lst_id)s "
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"from %(old_sp_type)s") %
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{'sp_type': sp['type'],
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'lst_id': listener['id'],
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'old_sp_type': oldsp['type']})
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raise n_exc.BadRequest(resource='lbaas-pool', msg=msg)
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