neutronvpn/impl/src/main/java/org/opendaylight/netvirt/neutronvpn/NeutronRouterChangeListener.java

   1 /*
   2  * Copyright © 2016, 2017 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.netvirt.neutronvpn;
   9
  10 import com.google.common.base.Optional;
  11 import java.util.ArrayList;
  12 import java.util.Collections;
  13 import java.util.HashMap;
  14 import java.util.List;
  15 import javax.annotation.PostConstruct;
  16 import javax.inject.Inject;
  17 import javax.inject.Singleton;
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase;
  21 import org.opendaylight.genius.mdsalutil.NwConstants;
  22 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.l3.attributes.Routes;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.Routers;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.routers.Router;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.routers.router.external_gateway_info.ExternalFixedIps;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkState;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.links.InterVpnLink;
  31 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 @Singleton
  36 public class NeutronRouterChangeListener extends AsyncDataTreeChangeListenerBase<Router, NeutronRouterChangeListener> {
  37     private static final Logger LOG = LoggerFactory.getLogger(NeutronRouterChangeListener.class);
  38     private final DataBroker dataBroker;
  39     private final NeutronvpnManager nvpnManager;
  40     private final NeutronvpnNatManager nvpnNatManager;
  41     private final NeutronSubnetGwMacResolver gwMacResolver;
  42     private final NeutronvpnUtils neutronvpnUtils;
  43     private final JobCoordinator jobCoordinator;
  44
  45     @Inject
  46     public NeutronRouterChangeListener(final DataBroker dataBroker, final NeutronvpnManager neutronvpnManager,
  47                                        final NeutronvpnNatManager neutronvpnNatManager,
  48                                        final NeutronSubnetGwMacResolver gwMacResolver,
  49                                        final NeutronvpnUtils neutronvpnUtils,
  50                                        final JobCoordinator jobCoordinator) {
  51         super(Router.class, NeutronRouterChangeListener.class);
  52         this.dataBroker = dataBroker;
  53         nvpnManager = neutronvpnManager;
  54         nvpnNatManager = neutronvpnNatManager;
  55         this.gwMacResolver = gwMacResolver;
  56         this.neutronvpnUtils = neutronvpnUtils;
  57         this.jobCoordinator = jobCoordinator;
  58     }
  59
  60     @Override
  61     @PostConstruct
  62     public void init() {
  63         LOG.info("{} init", getClass().getSimpleName());
  64         registerListener(LogicalDatastoreType.CONFIGURATION, dataBroker);
  65     }
  66
  67     @Override
  68     protected InstanceIdentifier<Router> getWildCardPath() {
  69         return InstanceIdentifier.create(Neutron.class).child(Routers.class).child(Router.class);
  70     }
  71
  72     @Override
  73     protected NeutronRouterChangeListener getDataTreeChangeListener() {
  74         return NeutronRouterChangeListener.this;
  75     }
  76
  77
  78     @Override
  79     protected void add(InstanceIdentifier<Router> identifier, Router input) {
  80         LOG.trace("Adding Router : key: {}, value={}", identifier, input);
  81         neutronvpnUtils.addToRouterCache(input);
  82         // Create internal VPN
  83         nvpnManager.createL3InternalVpn(input.getUuid(), null, null, null, null, null, input.getUuid(), null);
  84         jobCoordinator.enqueueJob(input.getUuid().toString(), () -> {
  85             nvpnNatManager.handleExternalNetworkForRouter(null, input);
  86             return Collections.emptyList();
  87         });
  88         gwMacResolver.sendArpRequestsToExtGateways(input);
  89     }
  90
  91     @Override
  92     protected void remove(InstanceIdentifier<Router> identifier, Router input) {
  93         LOG.trace("Removing router : key: {}, value={}", identifier, input);
  94         Uuid routerId = input.getUuid();
  95         // Handle router deletion for the NAT service
  96         /*External Router and networks is handled before deleting the internal VPN, as there is dependency
  97         on vpn operational data to release Lport tag in case of L3VPN over VxLAN*/
  98         if (input.getExternalGatewayInfo() != null) {
  99             Uuid extNetId = input.getExternalGatewayInfo().getExternalNetworkId();
 100             List<ExternalFixedIps> externalFixedIps = input.getExternalGatewayInfo().getExternalFixedIps();
 101             jobCoordinator.enqueueJob(input.getUuid().toString(), () -> {
 102                 nvpnNatManager.removeExternalNetworkFromRouter(extNetId, input, externalFixedIps);
 103                 return Collections.emptyList();
 104             });
 105         }
 106         //NOTE: Pass an empty routerSubnetIds list, as router interfaces
 107         //will be removed from VPN by invocations from NeutronPortChangeListener
 108         List<Uuid> routerSubnetIds = new ArrayList<>();
 109         nvpnManager.handleNeutronRouterDeleted(routerId, routerSubnetIds);
 110
 111         neutronvpnUtils.removeFromRouterCache(input);
 112         nvpnNatManager.removeNeutronRouterDpns(input);
 113     }
 114
 115     @Override
 116     protected void update(InstanceIdentifier<Router> identifier, Router original, Router update) {
 117         LOG.trace("Updating Router : key: {}, original value={}, update value={}", identifier, original, update);
 118         neutronvpnUtils.addToRouterCache(update);
 119         Uuid routerId = update.getUuid();
 120         neutronvpnUtils.addToRouterCache(update);
 121         Uuid vpnId = neutronvpnUtils.getVpnForRouter(routerId, true);
 122         // internal vpn always present in case external vpn not found
 123         if (vpnId == null) {
 124             vpnId = routerId;
 125         }
 126         List<Routes> oldRoutes = original.getRoutes() != null ? original.getRoutes() : new ArrayList<>();
 127         List<Routes> newRoutes = update.getRoutes() != null ? update.getRoutes() : new ArrayList<>();
 128         if (!oldRoutes.equals(newRoutes)) {
 129             newRoutes.removeIf(oldRoutes::remove);
 130
 131             if (!oldRoutes.isEmpty()) {
 132                 handleChangedRoutes(vpnId, oldRoutes, NwConstants.DEL_FLOW);
 133             }
 134
 135             //After initial extra-route configuration using cmd-"neutron router-update RouterA destination=IP-A,
 136             // nexthop=prefix-A",if another update is done using command - "neutron router-update RouterA
 137             // destination=IP-A,nexthop=prefix-B",neutron router listener calls update on prefix-A as well as prefix-B.
 138             // On prefix-A , secondary adj (IP-A) is removed ,where as its added on prefix-B. This back-to-back update
 139             // creates race-condition in Vrf Engine ,leading inconsistencies in l3nexthop, VpnExtraRoute,
 140             // VpnInterfaceOp DS. Hence a temporary fix of 2sec delay is introduced in neutron.
 141             // A better fix/design need to be thought to avoid race condition
 142             try {
 143                 Thread.sleep(2000); // sleep for 2sec
 144             } catch (java.lang.InterruptedException e) {
 145                 LOG.error("Exception while sleeping", e);
 146             }
 147
 148             handleChangedRoutes(vpnId, newRoutes, NwConstants.ADD_FLOW);
 149         }
 150
 151         jobCoordinator.enqueueJob(update.getUuid().toString(), () -> {
 152             nvpnNatManager.handleExternalNetworkForRouter(original, update);
 153             return Collections.emptyList();
 154         });
 155         gwMacResolver.sendArpRequestsToExtGateways(update);
 156     }
 157
 158     private void handleChangedRoutes(Uuid vpnName, List<Routes> routes, int addedOrRemoved) {
 159         // Some routes may point to an InterVpnLink's endpoint, lets treat them differently
 160         List<Routes> interVpnLinkRoutes = new ArrayList<>();
 161         List<Routes> otherRoutes = new ArrayList<>();
 162         HashMap<String, InterVpnLink> nexthopsXinterVpnLinks = new HashMap<>();
 163         for (Routes route : routes) {
 164             String nextHop = route.getNexthop().stringValue();
 165             // Nexthop is another VPN?
 166             Optional<InterVpnLink> interVpnLink = neutronvpnUtils.getInterVpnLinkByEndpointIp(nextHop);
 167             if (interVpnLink.isPresent()) {
 168                 Optional<InterVpnLinkState> interVpnLinkState =
 169                         neutronvpnUtils.getInterVpnLinkState(interVpnLink.get().getName());
 170                 if (interVpnLinkState.isPresent() && interVpnLinkState.get().getState()
 171                         == InterVpnLinkState.State.Active) {
 172                     interVpnLinkRoutes.add(route);
 173                     nexthopsXinterVpnLinks.put(nextHop, interVpnLink.get());
 174                 } else {
 175                     LOG.error("Failed installing route to {}. Reason: InterVPNLink {} is not Active",
 176                             route.getDestination().stringValue(), interVpnLink.get().getName());
 177                 }
 178             } else {
 179                 otherRoutes.add(route);
 180             }
 181         }
 182
 183         if (addedOrRemoved == NwConstants.ADD_FLOW) {
 184             nvpnManager.addInterVpnRoutes(vpnName, interVpnLinkRoutes, nexthopsXinterVpnLinks);
 185             nvpnManager.updateVpnInterfaceWithExtraRouteAdjacency(vpnName, otherRoutes);
 186         } else {
 187             nvpnManager.removeAdjacencyforExtraRoute(vpnName, otherRoutes);
 188             nvpnManager.removeInterVpnRoutes(vpnName, interVpnLinkRoutes, nexthopsXinterVpnLinks);
 189         }
 190     }
 191 }