# Copyright 2014 VMware, Inc # # 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 oslo_log import log as logging from neutron.api.v2 import attributes as attr from vmware_nsx.common import exceptions as nsxv_exc from vmware_nsx.common import locking from vmware_nsx.db import nsxv_db from vmware_nsx.plugins import nsx_v from vmware_nsx.plugins.nsx_v_drivers import ( abstract_router_driver as router_driver) from vmware_nsx.vshield import edge_utils LOG = logging.getLogger(__name__) class RouterExclusiveDriver(router_driver.RouterBaseDriver): def get_type(self): return "exclusive" def create_router(self, context, lrouter, allow_metadata=True): self.edge_manager.create_lrouter(context, lrouter, dist=False) if allow_metadata: self.plugin.metadata_proxy_handler.configure_router_edge( lrouter['id']) def update_router(self, context, router_id, router): r = router['router'] is_routes_update = True if 'routes' in r else False gw_info = self.plugin._extract_external_gw(context, router, is_extract=True) super(nsx_v.NsxVPluginV2, self.plugin).update_router( context, router_id, router) if gw_info != attr.ATTR_NOT_SPECIFIED: self._update_router_gw_info(context, router_id, gw_info, is_routes_update) elif is_routes_update: # here is used to handle routes which tenant updates. router_db = self.plugin._get_router(context, router_id) nexthop = self.plugin._get_external_attachment_info( context, router_db)[2] self.plugin._update_subnets_and_dnat_firewall(context, router_db) self.update_routes(context, router_id, nexthop) if 'admin_state_up' in r: self.plugin._update_router_admin_state( context, router_id, self.get_type(), r['admin_state_up']) return self.plugin.get_router(context, router_id) def delete_router(self, context, router_id): self.edge_manager.delete_lrouter(context, router_id, dist=False) if self.plugin.metadata_proxy_handler: self.plugin.metadata_proxy_handler.cleanup_router_edge( router_id) def update_routes(self, context, router_id, nexthop): with locking.LockManager.get_lock( self._get_router_edge_id(context, router_id), external=True): self.plugin._update_routes(context, router_id, nexthop) def _update_router_gw_info(self, context, router_id, info, is_routes_update=False): router = self.plugin._get_router(context, router_id) org_ext_net_id = router.gw_port_id and router.gw_port.network_id org_enable_snat = router.enable_snat orgaddr, orgmask, orgnexthop = ( self.plugin._get_external_attachment_info( context, router)) super(nsx_v.NsxVPluginV2, self.plugin)._update_router_gw_info( context, router_id, info, router=router) new_ext_net_id = router.gw_port_id and router.gw_port.network_id new_enable_snat = router.enable_snat newaddr, newmask, newnexthop = ( self.plugin._get_external_attachment_info( context, router)) edge_id = self._get_router_edge_id(context, router_id) with locking.LockManager.get_lock(edge_id, external=True): if new_ext_net_id != org_ext_net_id and orgnexthop: # network changed, so need to remove default gateway before # vnic can be configured LOG.debug("Delete default gateway %s", orgnexthop) edge_utils.clear_gateway(self.nsx_v, context, router_id) # Update external vnic if addr or mask is changed if orgaddr != newaddr or orgmask != newmask: edge_utils.update_external_interface( self.nsx_v, context, router_id, new_ext_net_id, newaddr, newmask) # Update SNAT rules if ext net changed # or ext net not changed but snat is changed. if (new_ext_net_id != org_ext_net_id or (new_ext_net_id == org_ext_net_id and new_enable_snat != org_enable_snat)): self.plugin._update_nat_rules(context, router) if (new_ext_net_id != org_ext_net_id or new_enable_snat != org_enable_snat or is_routes_update): self.plugin._update_subnets_and_dnat_firewall(context, router) # Update static routes in all. self.plugin._update_routes(context, router_id, newnexthop) def add_router_interface(self, context, router_id, interface_info): self.plugin._check_intf_number_of_router(context, router_id) info = super(nsx_v.NsxVPluginV2, self.plugin).add_router_interface( context, router_id, interface_info) router_db = self.plugin._get_router(context, router_id) subnet = self.plugin.get_subnet(context, info['subnet_id']) network_id = subnet['network_id'] address_groups = self.plugin._get_address_groups( context, router_id, network_id) with locking.LockManager.get_lock( self._get_router_edge_id(context, router_id), external=True): edge_utils.update_internal_interface( self.nsx_v, context, router_id, network_id, address_groups, router_db['admin_state_up']) # Update edge's firewall rules to accept subnets flows. self.plugin._update_subnets_and_dnat_firewall(context, router_db) if router_db.gw_port and router_db.enable_snat: # Update Nat rules on external edge vnic self.plugin._update_nat_rules(context, router_db) return info def remove_router_interface(self, context, router_id, interface_info): # If a loadbalancer is attached to this Edge appliance, we cannot # detach the subnet from the exclusive router. subnet = interface_info.get('subnet_id') if not subnet and interface_info.get('port_id'): port = self.plugin.get_port(context, interface_info['port_id']) port_subnets = [ fixed_ip['subnet_id'] for fixed_ip in port.get( 'fixed_ips', [])] subnet = port_subnets[0] if subnet and self.nsx_v.is_subnet_in_use(context, subnet): error = _('Cannot delete router interface while loadbalancers are ' 'provisioned on attached subnet') raise nsxv_exc.NsxPluginException(err_msg=error) info = super(nsx_v.NsxVPluginV2, self.plugin).remove_router_interface( context, router_id, interface_info) router_db = self.plugin._get_router(context, router_id) subnet = self.plugin.get_subnet(context, info['subnet_id']) network_id = subnet['network_id'] with locking.LockManager.get_lock( self._get_router_edge_id(context, router_id), external=True): if router_db.gw_port and router_db.enable_snat: # First update nat rules self.plugin._update_nat_rules(context, router_db) ports = self.plugin._get_router_interface_ports_by_network( context, router_id, network_id) self.plugin._update_subnets_and_dnat_firewall(context, router_db) # No subnet on the network connects to the edge vnic if not ports: edge_utils.delete_interface(self.nsx_v, context, router_id, network_id, dist=False) else: address_groups = self.plugin._get_address_groups( context, router_id, network_id) edge_utils.update_internal_interface(self.nsx_v, context, router_id, network_id, address_groups) return info def _update_edge_router(self, context, router_id): router = self.plugin._get_router(context.elevated(), router_id) with locking.LockManager.get_lock( self._get_router_edge_id(context, router_id), external=True): self.plugin._update_external_interface(context, router) self.plugin._update_nat_rules(context, router) self.plugin._update_subnets_and_dnat_firewall(context, router) def _get_router_edge_id(self, context, router_id): binding = nsxv_db.get_nsxv_router_binding(context.session, router_id) return binding['edge_id']