af3fd782a1
While cascade-deleting a LB, there are cases where the backend is out of sync with the OpenStack DBs. When the entire LB edge is missing, the result is various exceptions which should be handled. Change-Id: I4af46d6cb16dd5ea638b2e53a804b89538d38221
211 lines
8.1 KiB
Python
211 lines
8.1 KiB
Python
# Copyright 2015 VMware, Inc.
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# All Rights Reserved
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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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from oslo_log import helpers as log_helpers
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from oslo_log import log as logging
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from oslo_utils import excutils
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from neutron_lib import exceptions as n_exc
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from vmware_nsx.common import locking
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from vmware_nsx.db import nsxv_db
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from vmware_nsx.plugins.nsx_v.vshield.common import exceptions as nsxv_exc
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from vmware_nsx.services.lbaas import base_mgr
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from vmware_nsx.services.lbaas import lb_const
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from vmware_nsx.services.lbaas.nsx_v import lbaas_common as lb_common
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LOG = logging.getLogger(__name__)
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class EdgeHealthMonitorManagerFromDict(base_mgr.EdgeLoadbalancerBaseManager):
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def _convert_lbaas_monitor(self, hm):
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"""
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Transform OpenStack health monitor dict to NSXv health monitor dict.
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"""
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mon = {
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'type': lb_const.HEALTH_MONITOR_MAP.get(hm['type'], 'icmp'),
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'interval': hm['delay'],
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'timeout': hm['timeout'],
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'maxRetries': hm['max_retries'],
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'name': hm['id']}
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if hm['http_method']:
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mon['method'] = hm['http_method']
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if hm['url_path']:
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mon['url'] = hm['url_path']
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if hm['expected_codes']:
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mon['expected'] = hm['expected_codes']
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return mon
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@log_helpers.log_method_call
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def __init__(self, vcns_driver):
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super(EdgeHealthMonitorManagerFromDict, self).__init__(vcns_driver)
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def create(self, context, hm, completor):
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lb_id = hm['pool']['loadbalancer_id']
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lb_binding = nsxv_db.get_nsxv_lbaas_loadbalancer_binding(
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context.session, lb_id)
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edge_id = lb_binding['edge_id']
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pool_id = hm['pool']['id']
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pool_binding = nsxv_db.get_nsxv_lbaas_pool_binding(
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context.session, lb_id, pool_id)
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if not pool_binding:
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completor(success=False)
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msg = _('Failed to create health monitor on edge: %s. '
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'Binding not found') % edge_id
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LOG.error(msg)
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raise n_exc.BadRequest(resource='edge-lbaas', msg=msg)
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edge_pool_id = pool_binding['edge_pool_id']
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hm_binding = nsxv_db.get_nsxv_lbaas_monitor_binding(
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context.session, lb_id, pool_id, hm['id'], edge_id)
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edge_mon_id = None
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if hm_binding:
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edge_mon_id = hm_binding['edge_mon_id']
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else:
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edge_monitor = self._convert_lbaas_monitor(hm)
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try:
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with locking.LockManager.get_lock(edge_id):
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h = self.vcns.create_health_monitor(edge_id,
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edge_monitor)[0]
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edge_mon_id = lb_common.extract_resource_id(h['location'])
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nsxv_db.add_nsxv_lbaas_monitor_binding(
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context.session, lb_id, pool_id, hm['id'], edge_id,
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edge_mon_id)
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except nsxv_exc.VcnsApiException:
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with excutils.save_and_reraise_exception():
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completor(success=False)
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LOG.error('Failed to create health monitor on edge: %s',
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edge_id)
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try:
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# Associate monitor with Edge pool
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with locking.LockManager.get_lock(edge_id):
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edge_pool = self.vcns.get_pool(edge_id, edge_pool_id)[1]
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if edge_pool.get('monitorId'):
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edge_pool['monitorId'].append(edge_mon_id)
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else:
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edge_pool['monitorId'] = [edge_mon_id]
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self.vcns.update_pool(edge_id, edge_pool_id, edge_pool)
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except nsxv_exc.VcnsApiException:
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with excutils.save_and_reraise_exception():
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completor(success=False)
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LOG.error('Failed to create health monitor on edge: %s',
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edge_id)
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completor(success=True)
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def update(self, context, old_hm, new_hm, completor):
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lb_id = new_hm['pool']['loadbalancer_id']
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lb_binding = nsxv_db.get_nsxv_lbaas_loadbalancer_binding(
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context.session, lb_id)
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edge_id = lb_binding['edge_id']
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hm_binding = nsxv_db.get_nsxv_lbaas_monitor_binding(
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context.session, lb_id, new_hm['pool']['id'],
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new_hm['id'], edge_id)
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edge_monitor = self._convert_lbaas_monitor(new_hm)
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try:
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with locking.LockManager.get_lock(edge_id):
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self.vcns.update_health_monitor(edge_id,
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hm_binding['edge_mon_id'],
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edge_monitor)
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except nsxv_exc.VcnsApiException:
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with excutils.save_and_reraise_exception():
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completor(success=False)
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LOG.error('Failed to update monitor on edge: %s', edge_id)
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completor(success=True)
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def delete(self, context, hm, completor):
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pool_id = hm['pool']['id']
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lb_id = hm['pool']['loadbalancer_id']
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lb_binding = nsxv_db.get_nsxv_lbaas_loadbalancer_binding(
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context.session, lb_id)
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if not lb_binding:
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# Don't fail deletion if the resource is already gone
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LOG.warning("Couldn't find LB %s binding during HM deletion",
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lb_id)
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completor(success=True)
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return
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edge_id = lb_binding['edge_id']
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pool_binding = nsxv_db.get_nsxv_lbaas_pool_binding(
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context.session, lb_id, pool_id)
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if not pool_binding:
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nsxv_db.del_nsxv_lbaas_monitor_binding(
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context.session, lb_id, pool_id, hm['id'], edge_id)
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completor(success=True)
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return
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edge_pool_id = pool_binding['edge_pool_id']
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hm_binding = nsxv_db.get_nsxv_lbaas_monitor_binding(
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context.session, lb_id, pool_id, hm['id'], edge_id)
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try:
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edge_pool = self.vcns.get_pool(edge_id, edge_pool_id)[1]
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except nsxv_exc.VcnsApiException:
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# Pool doesn't exist, so member is obviously gone
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LOG.warning('Edge pool %s does not exist on edge %s',
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edge_pool_id, edge_id)
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nsxv_db.del_nsxv_lbaas_monitor_binding(
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context.session, lb_id, pool_id, hm['id'], edge_id)
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completor(success=True)
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return
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if hm_binding and hm_binding['edge_mon_id'] in edge_pool['monitorId']:
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edge_pool['monitorId'].remove(hm_binding['edge_mon_id'])
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try:
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with locking.LockManager.get_lock(edge_id):
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self.vcns.update_pool(edge_id, edge_pool_id, edge_pool)
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except nsxv_exc.VcnsApiException:
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with excutils.save_and_reraise_exception():
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completor(success=False)
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LOG.error('Failed to delete monitor mapping on edge: %s',
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edge_id)
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# If this monitor is not used on this edge anymore, delete it
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if hm_binding and not edge_pool['monitorId']:
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try:
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with locking.LockManager.get_lock(edge_id):
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self.vcns.delete_health_monitor(hm_binding['edge_id'],
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hm_binding['edge_mon_id'])
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except nsxv_exc.VcnsApiException:
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with excutils.save_and_reraise_exception():
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completor(success=False)
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LOG.error('Failed to delete monitor on edge: %s', edge_id)
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nsxv_db.del_nsxv_lbaas_monitor_binding(
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context.session, lb_id, pool_id, hm['id'], edge_id)
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completor(success=True)
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def delete_cascade(self, context, hm, completor):
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self.delete(context, hm, completor)
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