131 lines
3.4 KiB
Python
131 lines
3.4 KiB
Python
# Copyright (c) 2023 Red Hat, 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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import abc
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import threading
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from neutron_lib.agent import extension
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from neutron_lib import exceptions
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from neutron._i18n import _
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from neutron.agent import agent_extensions_manager as agent_ext_mgr
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OVN_AGENT_EXT_MANAGER_NAMESPACE = 'neutron.agent.ovn.extensions'
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class ConfigException(exceptions.NeutronException):
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"""Misconfiguration of the OVN Neutron Agent"""
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message = _('Error configuring the OVN Neutron Agent: %(description)s.')
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class OVNAgentExtensionManager(agent_ext_mgr.AgentExtensionsManager):
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def __init__(self, conf):
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super().__init__(conf, OVN_AGENT_EXT_MANAGER_NAMESPACE)
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for ext in self:
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if not isinstance(ext.obj, OVNAgentExtension):
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desc = ('Extension %s class is not inheriting from '
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'"OVNAgentExtension"')
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raise ConfigException(description=desc)
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class OVNAgentExtension(extension.AgentExtension, metaclass=abc.ABCMeta):
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def __init__(self):
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super().__init__()
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self.agent_api = None
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def initialize(self, *args):
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"""Initialize agent extension."""
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self.agent_api = None
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def consume_api(self, agent_api):
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"""Configure the Agent API.
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Allows an extension to gain access to resources internal to the
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neutron agent and otherwise unavailable to the extension.
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"""
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self.agent_api = agent_api
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@property
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@abc.abstractmethod
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def ovs_idl_events(self):
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pass
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@property
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@abc.abstractmethod
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def nb_idl_tables(self):
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pass
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@property
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@abc.abstractmethod
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def nb_idl_events(self):
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pass
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@property
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@abc.abstractmethod
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def sb_idl_tables(self):
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pass
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@property
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@abc.abstractmethod
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def sb_idl_events(self):
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pass
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class OVNAgentExtensionAPI(object):
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"""Implements the OVN Neutron Agent API"""
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def __init__(self):
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self._nb_idl = None
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self._sb_idl = None
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self._has_chassis_private = None
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self._ovs_idl = None
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self.sb_post_fork_event = threading.Event()
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self.sb_post_fork_event.clear()
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self.nb_post_fork_event = threading.Event()
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self.nb_post_fork_event.clear()
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@property
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def ovs_idl(self):
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return self._ovs_idl
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@ovs_idl.setter
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def ovs_idl(self, val):
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self._ovs_idl = val
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@property
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def nb_idl(self):
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if not self._nb_idl:
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self.nb_post_fork_event.wait()
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return self._nb_idl
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@nb_idl.setter
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def nb_idl(self, val):
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self.nb_post_fork_event.set()
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self._nb_idl = val
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@property
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def sb_idl(self):
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if not self._sb_idl:
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self.sb_post_fork_event.wait()
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return self._sb_idl
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@sb_idl.setter
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def sb_idl(self, val):
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self.sb_post_fork_event.set()
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self._sb_idl = val
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