117 lines
4.1 KiB
Python
117 lines
4.1 KiB
Python
# Copyright 2014 - Rackspace Hosting
|
|
#
|
|
# 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.
|
|
|
|
"""Common RPC service and API tools for Magnum."""
|
|
|
|
import eventlet
|
|
from oslo_config import cfg
|
|
import oslo_messaging as messaging
|
|
from oslo_service import service
|
|
|
|
from magnum.common import rpc
|
|
from magnum.objects import base as objects_base
|
|
from magnum.service import periodic
|
|
from magnum.servicegroup import magnum_service_periodic as servicegroup
|
|
|
|
|
|
# NOTE(paulczar):
|
|
# Ubuntu 14.04 forces librabbitmq when kombu is used
|
|
# Unfortunately it forces a version that has a crash
|
|
# bug. Calling eventlet.monkey_patch() tells kombu
|
|
# to use libamqp instead.
|
|
eventlet.monkey_patch()
|
|
|
|
# NOTE(asalkeld):
|
|
# The magnum.openstack.common.rpc entries are for compatibility
|
|
# with devstack rpc_backend configuration values.
|
|
TRANSPORT_ALIASES = {
|
|
'magnum.openstack.common.rpc.impl_kombu': 'rabbit',
|
|
'magnum.openstack.common.rpc.impl_qpid': 'qpid',
|
|
'magnum.openstack.common.rpc.impl_zmq': 'zmq',
|
|
}
|
|
|
|
periodic_opts = [
|
|
cfg.BoolOpt('periodic_enable',
|
|
default=True,
|
|
help='Enable periodic tasks.'),
|
|
cfg.IntOpt('periodic_interval_max',
|
|
default=60,
|
|
help='Max interval size between periodic tasks execution in '
|
|
'seconds.'),
|
|
]
|
|
|
|
CONF = cfg.CONF
|
|
CONF.register_opts(periodic_opts)
|
|
|
|
|
|
class Service(service.Service):
|
|
|
|
def __init__(self, topic, server, handlers, binary):
|
|
super(Service, self).__init__()
|
|
serializer = rpc.RequestContextSerializer(
|
|
objects_base.MagnumObjectSerializer())
|
|
transport = messaging.get_transport(cfg.CONF,
|
|
aliases=TRANSPORT_ALIASES)
|
|
# TODO(asalkeld) add support for version='x.y'
|
|
target = messaging.Target(topic=topic, server=server)
|
|
self._server = messaging.get_rpc_server(transport, target, handlers,
|
|
serializer=serializer)
|
|
self.binary = binary
|
|
|
|
def start(self):
|
|
# NOTE(suro-patz): The parent class has created a threadgroup, already
|
|
if CONF.periodic_enable:
|
|
periodic.setup(CONF, self.tg)
|
|
servicegroup.setup(CONF, self.binary, self.tg)
|
|
self._server.start()
|
|
|
|
def stop(self):
|
|
if self._server:
|
|
self._server.stop()
|
|
self._server.wait()
|
|
super(Service, self).stop()
|
|
|
|
@classmethod
|
|
def create(cls, topic, server, handlers, binary):
|
|
service_obj = cls(topic, server, handlers, binary)
|
|
return service_obj
|
|
|
|
|
|
class API(object):
|
|
def __init__(self, transport=None, context=None, topic=None, server=None,
|
|
timeout=None):
|
|
serializer = rpc.RequestContextSerializer(
|
|
objects_base.MagnumObjectSerializer())
|
|
if transport is None:
|
|
exmods = rpc.get_allowed_exmods()
|
|
transport = messaging.get_transport(cfg.CONF,
|
|
allowed_remote_exmods=exmods,
|
|
aliases=TRANSPORT_ALIASES)
|
|
self._context = context
|
|
if topic is None:
|
|
topic = ''
|
|
target = messaging.Target(topic=topic, server=server)
|
|
self._client = messaging.RPCClient(transport, target,
|
|
serializer=serializer,
|
|
timeout=timeout)
|
|
|
|
def _call(self, method, *args, **kwargs):
|
|
return self._client.call(self._context, method, *args, **kwargs)
|
|
|
|
def _cast(self, method, *args, **kwargs):
|
|
self._client.cast(self._context, method, *args, **kwargs)
|
|
|
|
def echo(self, message):
|
|
self._cast('echo', message=message)
|