82 lines
2.7 KiB
Python
82 lines
2.7 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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from oslo import 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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'''
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VERSION_ALIASES = {
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'grizzly': '1.1',
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'havana': '1.1',
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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 _get_compat_version(self, current, havana_compat):
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if not self.client.can_send_version(current):
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return havana_compat
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return current
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def add_console(self, ctxt, instance_id):
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# NOTE(russellb) Havana compat
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version = self._get_compat_version('2.0', '1.0')
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cctxt = self.client.prepare(version=version)
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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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# NOTE(russellb) Havana compat
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version = self._get_compat_version('2.0', '1.0')
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cctxt = self.client.prepare(version=version)
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cctxt.cast(ctxt, 'remove_console', console_id=console_id)
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