234 lines
8.7 KiB
Python
234 lines
8.7 KiB
Python
#
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# Copyright 2013 Radware LTD.
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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: Avishay Balderman, Radware
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from oslo.config import cfg
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from neutron.db import api as qdbapi
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from neutron.db.loadbalancer import loadbalancer_db
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from neutron.openstack.common import importutils
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from neutron.openstack.common import log as logging
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from neutron.plugins.common import constants
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LOG = logging.getLogger(__name__)
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DEFAULT_DRIVER = ("neutron.services.loadbalancer.drivers.haproxy"
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".plugin_driver.HaproxyOnHostPluginDriver")
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lbaas_plugin_opts = [
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cfg.StrOpt('driver_fqn',
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default=DEFAULT_DRIVER,
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help=_('LBaaS driver Fully Qualified Name'))
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]
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cfg.CONF.register_opts(lbaas_plugin_opts, "LBAAS")
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class LoadBalancerPlugin(loadbalancer_db.LoadBalancerPluginDb):
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"""Implementation of the Neutron Loadbalancer Service Plugin.
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This class manages the workflow of LBaaS request/response.
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Most DB related works are implemented in class
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loadbalancer_db.LoadBalancerPluginDb.
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"""
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supported_extension_aliases = ["lbaas"]
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def __init__(self):
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"""Initialization for the loadbalancer service plugin."""
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qdbapi.register_models()
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self._load_drivers()
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def _load_drivers(self):
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"""Loads plugin-driver from configuration.
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That method will later leverage service type framework
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"""
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try:
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self.driver = importutils.import_object(
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cfg.CONF.LBAAS.driver_fqn, self
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)
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except ImportError:
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LOG.exception(_("Error loading LBaaS driver %s"),
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cfg.CONF.LBAAS.driver_fqn)
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def get_plugin_type(self):
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return constants.LOADBALANCER
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def get_plugin_description(self):
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return "Neutron LoadBalancer Service Plugin"
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def create_vip(self, context, vip):
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v = super(LoadBalancerPlugin, self).create_vip(context, vip)
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self.driver.create_vip(context, v)
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return v
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def update_vip(self, context, id, vip):
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if 'status' not in vip['vip']:
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vip['vip']['status'] = constants.PENDING_UPDATE
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old_vip = self.get_vip(context, id)
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v = super(LoadBalancerPlugin, self).update_vip(context, id, vip)
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self.driver.update_vip(context, old_vip, v)
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return v
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def _delete_db_vip(self, context, id):
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# proxy the call until plugin inherits from DBPlugin
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super(LoadBalancerPlugin, self).delete_vip(context, id)
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def delete_vip(self, context, id):
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self.update_status(context, loadbalancer_db.Vip,
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id, constants.PENDING_DELETE)
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v = self.get_vip(context, id)
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self.driver.delete_vip(context, v)
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def create_pool(self, context, pool):
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p = super(LoadBalancerPlugin, self).create_pool(context, pool)
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self.driver.create_pool(context, p)
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return p
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def update_pool(self, context, id, pool):
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if 'status' not in pool['pool']:
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pool['pool']['status'] = constants.PENDING_UPDATE
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old_pool = self.get_pool(context, id)
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p = super(LoadBalancerPlugin, self).update_pool(context, id, pool)
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self.driver.update_pool(context, old_pool, p)
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return p
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def _delete_db_pool(self, context, id):
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# proxy the call until plugin inherits from DBPlugin
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super(LoadBalancerPlugin, self).delete_pool(context, id)
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def delete_pool(self, context, id):
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self.update_status(context, loadbalancer_db.Pool,
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id, constants.PENDING_DELETE)
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p = self.get_pool(context, id)
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self.driver.delete_pool(context, p)
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def create_member(self, context, member):
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m = super(LoadBalancerPlugin, self).create_member(context, member)
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self.driver.create_member(context, m)
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return m
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def update_member(self, context, id, member):
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if 'status' not in member['member']:
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member['member']['status'] = constants.PENDING_UPDATE
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old_member = self.get_member(context, id)
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m = super(LoadBalancerPlugin, self).update_member(context, id, member)
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self.driver.update_member(context, old_member, m)
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return m
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def _delete_db_member(self, context, id):
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# proxy the call until plugin inherits from DBPlugin
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super(LoadBalancerPlugin, self).delete_member(context, id)
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def delete_member(self, context, id):
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self.update_status(context, loadbalancer_db.Member,
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id, constants.PENDING_DELETE)
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m = self.get_member(context, id)
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self.driver.delete_member(context, m)
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def create_health_monitor(self, context, health_monitor):
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# no PENDING_CREATE status sinse healthmon is shared DB object
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hm = super(LoadBalancerPlugin, self).create_health_monitor(
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context,
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health_monitor
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)
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self.driver.create_health_monitor(context, hm)
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return hm
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def update_health_monitor(self, context, id, health_monitor):
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if 'status' not in health_monitor['health_monitor']:
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health_monitor['health_monitor']['status'] = (
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constants.PENDING_UPDATE
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)
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old_hm = self.get_health_monitor(context, id)
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hm = super(LoadBalancerPlugin, self).update_health_monitor(
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context,
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id,
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health_monitor
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)
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with context.session.begin(subtransactions=True):
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qry = context.session.query(
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loadbalancer_db.PoolMonitorAssociation
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).filter_by(monitor_id=hm['id'])
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for assoc in qry:
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self.driver.update_health_monitor(context, old_hm,
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hm, assoc['pool_id'])
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return hm
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def _delete_db_pool_health_monitor(self, context, hm_id, pool_id):
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super(LoadBalancerPlugin, self).delete_pool_health_monitor(context,
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hm_id,
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pool_id)
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def delete_health_monitor(self, context, id):
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with context.session.begin(subtransactions=True):
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hm = self.get_health_monitor(context, id)
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qry = context.session.query(
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loadbalancer_db.PoolMonitorAssociation
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).filter_by(monitor_id=id)
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for assoc in qry:
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self.driver.delete_pool_health_monitor(context,
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hm,
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assoc['pool_id'])
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def create_pool_health_monitor(self, context, health_monitor, pool_id):
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retval = super(LoadBalancerPlugin, self).create_pool_health_monitor(
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context,
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health_monitor,
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pool_id
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)
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# open issue: PoolMonitorAssociation has no status field
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# so we cant set the status to pending and let the driver
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# set the real status of the association
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self.driver.create_pool_health_monitor(
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context, health_monitor, pool_id)
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return retval
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def delete_pool_health_monitor(self, context, id, pool_id):
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hm = self.get_health_monitor(context, id)
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self.driver.delete_pool_health_monitor(
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context, hm, pool_id)
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def stats(self, context, pool_id):
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stats_data = self.driver.stats(context, pool_id)
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# if we get something from the driver -
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# update the db and return the value from db
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# else - return what we have in db
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if stats_data:
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super(LoadBalancerPlugin, self)._update_pool_stats(
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context,
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pool_id,
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stats_data
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)
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return super(LoadBalancerPlugin, self).stats(context,
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pool_id)
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def populate_vip_graph(self, context, vip):
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"""Populate the vip with: pool, members, healthmonitors."""
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pool = self.get_pool(context, vip['pool_id'])
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vip['pool'] = pool
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vip['members'] = [
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self.get_member(context, member_id)
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for member_id in pool['members']]
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vip['health_monitors'] = [
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self.get_health_monitor(context, hm_id)
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for hm_id in pool['health_monitors']]
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return vip
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