5e8ec9d388
Update all of the rpc client API classes to include a version alias for the latest version implemented in Liberty. This alias is needed when doing rolling upgrades from Liberty to Mitaka. With this in place, you can ensure all services only send messages that both Liberty and Mitaka will understand. Change-Id: I3eabae03483806602d7dea0e4ab737db4917d0fd
83 lines
2.6 KiB
Python
83 lines
2.6 KiB
Python
# Copyright 2013 Red Hat, Inc.
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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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"""
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Client side of the console RPC API.
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"""
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from oslo_config import cfg
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import oslo_messaging as messaging
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from nova import rpc
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rpcapi_opts = [
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cfg.StrOpt('console_topic',
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default='console',
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help='The topic console proxy nodes listen on'),
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]
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CONF = cfg.CONF
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CONF.register_opts(rpcapi_opts)
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rpcapi_cap_opt = cfg.StrOpt('console',
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help='Set a version cap for messages sent to console services')
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CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')
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class ConsoleAPI(object):
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'''Client side of the console rpc API.
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API version history:
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1.0 - Initial version.
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1.1 - Added get_backdoor_port()
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... Grizzly and Havana support message version 1.1. So, any changes to
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existing methods in 1.x after that point should be done such that they
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can handle the version_cap being set to 1.1.
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2.0 - Major API rev for Icehouse
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... Icehouse, Juno, Kilo, Liberty support message version 2.0.
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So, any changes to existing methods in 2.x after that point
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should be done such that they can handle the version_cap being
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set to 2.0.
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'''
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VERSION_ALIASES = {
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'grizzly': '1.1',
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'havana': '1.1',
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'icehouse': '2.0',
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'juno': '2.0',
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'kilo': '2.0',
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'liberty': '2.0',
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}
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def __init__(self, topic=None, server=None):
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super(ConsoleAPI, self).__init__()
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topic = topic if topic else CONF.console_topic
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target = messaging.Target(topic=topic, server=server, version='2.0')
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version_cap = self.VERSION_ALIASES.get(CONF.upgrade_levels.console,
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CONF.upgrade_levels.console)
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self.client = rpc.get_client(target, version_cap=version_cap)
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def add_console(self, ctxt, instance_id):
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cctxt = self.client.prepare()
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cctxt.cast(ctxt, 'add_console', instance_id=instance_id)
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def remove_console(self, ctxt, console_id):
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cctxt = self.client.prepare()
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cctxt.cast(ctxt, 'remove_console', console_id=console_id)
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