916d97b5d6
Unifies haproxy reference implementation to make common agent based plugin driver which is suitable for all vendors who wants to use async mechanism. - Agent API as well as device driver API changed to handle loadbalancer objects individually; - Agent loads device drivers according to config; - LogicalDeviceCache class was removed from agent as it was used only as a list - to put and remove entries ant check whether entry is in or not. It was replaced with instance_mapping dict in agent to store known instances and corresponding device_drivers; - Agent reports which device drivers are supported (needs for scheduling on plugin side); - Agent-to-plugin API was extended to provide an ability for agent to update statuses of pools/vips/members/health_monitors; - Vendor should only implement device driver; plugin driver just needs to inherit AgentBasedPluginDriver and override device_driver member; - This patch doesn't move files to make review easier; all rename/replace will be done in a subsequent patch; DocImpact NOTE: Since the change in the agent RPC API is backward-incompatible (major RPC version change), LBaaS server-agent communications will be completely broken until both sides are upgraded so users will be unable to create new or update existing HAProxy loadbalancer instances during upgrade Implements blueprint lbaas-common-agent-driver Change-Id: I9fd90a1321611d202ef838681273081fa6c1686a
101 lines
3.0 KiB
Python
101 lines
3.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2013 New Dream Network, LLC (DreamHost)
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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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# @author: Mark McClain, DreamHost
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from neutron.openstack.common.rpc import proxy
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class LbaasAgentApi(proxy.RpcProxy):
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"""Agent side of the Agent to Plugin RPC API."""
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API_VERSION = '2.0'
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# history
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# 1.0 Initial version
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# 2.0 Generic API for agent based drivers
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# - get_logical_device() handling changed on plugin side;
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# - pool_deployed() and update_status() methods added;
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def __init__(self, topic, context, host):
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super(LbaasAgentApi, self).__init__(topic, self.API_VERSION)
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self.context = context
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self.host = host
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def get_ready_devices(self):
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return self.call(
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self.context,
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self.make_msg('get_ready_devices', host=self.host),
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topic=self.topic
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)
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def pool_destroyed(self, pool_id):
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return self.call(
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self.context,
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self.make_msg('pool_destroyed', pool_id=pool_id),
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topic=self.topic
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)
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def pool_deployed(self, pool_id):
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return self.call(
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self.context,
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self.make_msg('pool_deployed', pool_id=pool_id),
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topic=self.topic
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)
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def get_logical_device(self, pool_id):
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return self.call(
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self.context,
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self.make_msg(
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'get_logical_device',
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pool_id=pool_id
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),
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topic=self.topic
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)
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def update_status(self, obj_type, obj_id, status):
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return self.call(
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self.context,
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self.make_msg('update_status', obj_type=obj_type, obj_id=obj_id,
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status=status),
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topic=self.topic
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)
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def plug_vip_port(self, port_id):
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return self.call(
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self.context,
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self.make_msg('plug_vip_port', port_id=port_id, host=self.host),
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topic=self.topic
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)
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def unplug_vip_port(self, port_id):
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return self.call(
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self.context,
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self.make_msg('unplug_vip_port', port_id=port_id, host=self.host),
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topic=self.topic
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)
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def update_pool_stats(self, pool_id, stats):
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return self.call(
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self.context,
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self.make_msg(
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'update_pool_stats',
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pool_id=pool_id,
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stats=stats,
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host=self.host
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),
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topic=self.topic
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)
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