Load Balancing as a Service (LBaaS) for OpenStack
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octavia/octavia/amphorae/backends/agent/api_server/udp_listener_base.py

103 lines
3.0 KiB

# Copyright 2018 OpenStack Foundation
#
# 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.
import abc
from oslo_config import cfg
from stevedore import driver as stevedore_driver
CONF = cfg.CONF
UDP_SERVER_NAMESPACE = 'octavia.amphora.udp_api_server'
class UdpListenerApiServerBase(object, metaclass=abc.ABCMeta):
"""Base UDP Listener Server API
"""
_SUBSCRIBED_AMP_COMPILE = []
SERVER_INSTANCE = None
@classmethod
def get_server_driver(cls):
if not cls.SERVER_INSTANCE:
cls.SERVER_INSTANCE = stevedore_driver.DriverManager(
namespace=UDP_SERVER_NAMESPACE,
name=CONF.amphora_agent.amphora_udp_driver,
invoke_on_load=True,
).driver
return cls.SERVER_INSTANCE
def get_subscribed_amp_compile_info(self):
return self._SUBSCRIBED_AMP_COMPILE
@abc.abstractmethod
def upload_udp_listener_config(self, listener_id):
"""Upload the configuration for UDP.
:param listener_id: The id of a UDP Listener
:returns: HTTP response with status code.
:raises Exception: If any file / directory is not found or
fail to create.
"""
@abc.abstractmethod
def get_udp_listener_config(self, listener_id):
"""Gets the UDP Listener configuration details
:param listener_id: the id of the UDP Listener
:returns: HTTP response with status code.
:raises Exception: If the listener is failed to find.
"""
@abc.abstractmethod
def manage_udp_listener(self, listener_id, action):
"""Gets the UDP Listener configuration details
:param listener_id: the id of the UDP Listener
:param action: the operation type.
:returns: HTTP response with status code.
:raises Exception: If the listener is failed to find.
"""
@abc.abstractmethod
def get_all_udp_listeners_status(self):
"""Gets the status of all UDP Listeners
This method will not consult the stats socket
so a listener might show as ACTIVE but still be
in ERROR
:returns: a list of UDP Listener status
:raises Exception: If the listener pid located directory is not exist
"""
@abc.abstractmethod
def delete_udp_listener(self, listener_id):
"""Delete a UDP Listener from a amphora
:param listener_id: The id of the listener
:returns: HTTP response with status code.
:raises Exception: If unsupport initial system of amphora.
"""