d986a6f280
- adds simple chance scheduling on create pool operation - adds PoolsLoadbalancerAgentBinding db table - adds lbaas_agentscheduler extension to list pools hosted by a particular agent and to get an agent hosting a particular pool - adds agent notifiers mapping to AgentSchedulerDbMixin to make it easier for services to add their agent notifiers to the core plugin Implements blueprint lbaas-agent-scheduler Change-Id: Id98649fd5c7873dcd5be1a2b117b8bed25f06cc2
139 lines
4.3 KiB
Python
139 lines
4.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright (c) 2013 OpenStack Foundation.
|
|
# All rights reserved.
|
|
#
|
|
# 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.
|
|
|
|
from abc import abstractmethod
|
|
|
|
from neutron.api import extensions
|
|
from neutron.api.v2 import base
|
|
from neutron.api.v2 import resource
|
|
from neutron.common import constants
|
|
from neutron.extensions import agent
|
|
from neutron import manager
|
|
from neutron.plugins.common import constants as plugin_const
|
|
from neutron import policy
|
|
from neutron import wsgi
|
|
|
|
LOADBALANCER_POOL = 'loadbalancer-pool'
|
|
LOADBALANCER_POOLS = LOADBALANCER_POOL + 's'
|
|
LOADBALANCER_AGENT = 'loadbalancer-agent'
|
|
|
|
|
|
class PoolSchedulerController(wsgi.Controller):
|
|
def index(self, request, **kwargs):
|
|
lbaas_plugin = manager.NeutronManager.get_service_plugins().get(
|
|
plugin_const.LOADBALANCER)
|
|
if not lbaas_plugin:
|
|
return {'pools': []}
|
|
|
|
policy.enforce(request.context,
|
|
"get_%s" % LOADBALANCER_POOLS,
|
|
{},
|
|
plugin=lbaas_plugin)
|
|
return lbaas_plugin.list_pools_on_lbaas_agent(
|
|
request.context, kwargs['agent_id'])
|
|
|
|
|
|
class LbaasAgentHostingPoolController(wsgi.Controller):
|
|
def index(self, request, **kwargs):
|
|
lbaas_plugin = manager.NeutronManager.get_service_plugins().get(
|
|
plugin_const.LOADBALANCER)
|
|
if not lbaas_plugin:
|
|
return
|
|
|
|
policy.enforce(request.context,
|
|
"get_%s" % LOADBALANCER_AGENT,
|
|
{},
|
|
plugin=lbaas_plugin)
|
|
return lbaas_plugin.get_lbaas_agent_hosting_pool(
|
|
request.context, kwargs['pool_id'])
|
|
|
|
|
|
class Lbaas_agentscheduler(extensions.ExtensionDescriptor):
|
|
"""Extension class supporting l3 agent scheduler.
|
|
"""
|
|
|
|
@classmethod
|
|
def get_name(cls):
|
|
return "Loadbalancer Agent Scheduler"
|
|
|
|
@classmethod
|
|
def get_alias(cls):
|
|
return constants.LBAAS_AGENT_SCHEDULER_EXT_ALIAS
|
|
|
|
@classmethod
|
|
def get_description(cls):
|
|
return "Schedule pools among lbaas agents"
|
|
|
|
@classmethod
|
|
def get_namespace(cls):
|
|
return "http://docs.openstack.org/ext/lbaas_agent_scheduler/api/v1.0"
|
|
|
|
@classmethod
|
|
def get_updated(cls):
|
|
return "2013-02-07T10:00:00-00:00"
|
|
|
|
@classmethod
|
|
def get_resources(cls):
|
|
"""Returns Ext Resources."""
|
|
exts = []
|
|
parent = dict(member_name="agent",
|
|
collection_name="agents")
|
|
|
|
controller = resource.Resource(PoolSchedulerController(),
|
|
base.FAULT_MAP)
|
|
exts.append(extensions.ResourceExtension(
|
|
LOADBALANCER_POOLS, controller, parent))
|
|
|
|
parent = dict(member_name="pool",
|
|
collection_name="pools")
|
|
|
|
controller = resource.Resource(LbaasAgentHostingPoolController(),
|
|
base.FAULT_MAP)
|
|
exts.append(extensions.ResourceExtension(
|
|
LOADBALANCER_AGENT, controller, parent,
|
|
path_prefix=plugin_const.
|
|
COMMON_PREFIXES[plugin_const.LOADBALANCER]))
|
|
return exts
|
|
|
|
def get_extended_resources(self, version):
|
|
return {}
|
|
|
|
|
|
class NoEligibleLbaasAgent(agent.AgentNotFound):
|
|
message = _("No eligible loadbalancer agent found "
|
|
"for pool %(pool_id)s.")
|
|
|
|
|
|
class NoActiveLbaasAgent(agent.AgentNotFound):
|
|
message = _("No active loadbalancer agent found "
|
|
"for pool %(pool_id)s.")
|
|
|
|
|
|
class LbaasAgentSchedulerPluginBase(object):
|
|
"""REST API to operate the lbaas agent scheduler.
|
|
|
|
All of method must be in an admin context.
|
|
"""
|
|
|
|
@abstractmethod
|
|
def list_pools_on_lbaas_agent(self, context, id):
|
|
pass
|
|
|
|
@abstractmethod
|
|
def get_lbaas_agent_hosting_pool(self, context, pool_id):
|
|
pass
|