renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/policy/BridgeDomainManagerImpl.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. 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
   9 package org.opendaylight.groupbasedpolicy.renderer.vpp.policy;
  10
  11 import java.util.Collection;
  12 import java.util.Collections;
  13 import java.util.concurrent.ExecutionException;
  14 import java.util.concurrent.TimeoutException;
  15
  16 import javax.annotation.Nonnull;
  17 import javax.annotation.Nullable;
  18
  19 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  20 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  21 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  22 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  23 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  24 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  25 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  26 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  27 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  28 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  29 import org.opendaylight.groupbasedpolicy.renderer.vpp.api.BridgeDomainManager;
  30 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.VppIidFactory;
  31 import org.opendaylight.groupbasedpolicy.util.DataStoreHelper;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.Config;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.bridge.domain.base.attributes.PhysicalLocationRef;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.GbpBridgeDomain;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.GbpBridgeDomainKey;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.l2.types.rev130827.VlanId;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev161214.VxlanVni;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev161214.vpp.state.bridge.domains.BridgeDomain;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev161214.vpp.state.bridge.domains.BridgeDomainKey;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.status.rev161005.BridgeDomainStatusAugmentation;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.status.rev161005.BridgeDomainStatusFields.BridgeDomainStatus;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.NodeVbridgeAugment;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.TopologyTypesVbridgeAugment;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.TopologyTypesVbridgeAugmentBuilder;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.TopologyVbridgeAugment;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.TopologyVbridgeAugmentBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.network.topology.topology.node.BridgeMember;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.topology.rev160129.network.topology.topology.topology.types.VbridgeTopologyBuilder;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.tunnel.vlan.rev160429.NodeVbridgeVlanAugment;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.tunnel.vlan.rev160429.NodeVbridgeVlanAugmentBuilder;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.tunnel.vlan.rev160429.TunnelTypeVlan;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.tunnel.vlan.rev160429.network.topology.topology.tunnel.parameters.VlanNetworkParametersBuilder;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.tunnel.vxlan.rev160429.TunnelTypeVxlan;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vbridge.tunnel.vxlan.rev160429.network.topology.topology.tunnel.parameters.VxlanTunnelParametersBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.vlan.rev161214._802dot1q;
  56 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  57 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  58 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  59 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyBuilder;
  60 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  61 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  62 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
  63 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  64 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.TopologyTypes;
  65 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.TopologyTypesBuilder;
  66 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNodeBuilder;
  67 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  68 import org.opendaylight.yangtools.yang.binding.DataObject;
  69 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  70 import org.slf4j.Logger;
  71 import org.slf4j.LoggerFactory;
  72
  73 import com.google.common.base.Optional;
  74 import com.google.common.base.Preconditions;
  75 import com.google.common.util.concurrent.AsyncFunction;
  76 import com.google.common.util.concurrent.CheckedFuture;
  77 import com.google.common.util.concurrent.FutureCallback;
  78 import com.google.common.util.concurrent.Futures;
  79 import com.google.common.util.concurrent.ListenableFuture;
  80 import com.google.common.util.concurrent.SettableFuture;
  81
  82 public class BridgeDomainManagerImpl implements BridgeDomainManager {
  83
  84     private static final Logger LOG = LoggerFactory.getLogger(BridgeDomainManagerImpl.class);
  85     private static final TopologyId SUPPORTING_TOPOLOGY_NETCONF = new TopologyId("topology-netconf");
  86     private static final TopologyTypes VBRIDGE_TOPOLOGY_TYPE = new TopologyTypesBuilder().addAugmentation(
  87             TopologyTypesVbridgeAugment.class,
  88             new TopologyTypesVbridgeAugmentBuilder().setVbridgeTopology(new VbridgeTopologyBuilder().build()).build())
  89             .build();
  90     private final DataBroker dataProvider;
  91
  92     private static final class ListenableFutureSetter<T extends DataObject>
  93             implements ClusteredDataTreeChangeListener<T> {
  94
  95         private static final Logger LOG = LoggerFactory.getLogger(ListenableFutureSetter.class);
  96         private final SettableFuture<Void> future;
  97         private final ModificationType modificationForFutureSet;
  98         private final DataTreeIdentifier<T> iid;
  99         private final ListenerRegistration<ListenableFutureSetter<T>> registeredListener;
 100
 101         private ListenableFutureSetter(DataBroker dataProvider, SettableFuture<Void> future,
 102                                        DataTreeIdentifier<T> iid, ModificationType modificationForFutureSet) {
 103             this.future = Preconditions.checkNotNull(future);
 104             Preconditions.checkArgument(!future.isDone());
 105             this.modificationForFutureSet = Preconditions.checkNotNull(modificationForFutureSet);
 106             this.iid = Preconditions.checkNotNull(iid);
 107             registeredListener = dataProvider.registerDataTreeChangeListener(iid, this);
 108             LOG.debug("Registered listener for path {}", iid.getRootIdentifier());
 109         }
 110
 111         @Override
 112         public void onDataTreeChanged(@Nonnull final Collection<DataTreeModification<T>> changes) {
 113             changes.forEach(modification -> {
 114                 final DataObjectModification<T> rootNode = modification.getRootNode();
 115                 final ModificationType modificationType = rootNode.getModificationType();
 116                 if (modificationType == modificationForFutureSet) {
 117                     LOG.debug("{} in OPER DS: {}", modificationType.name(), iid.getRootIdentifier());
 118                     final T data = rootNode.getDataAfter();
 119                     // If waiting for bridge domain creation, do more specific check about BD status
 120                     if (data != null && data instanceof BridgeDomain) {
 121                         final BridgeDomain domain = (BridgeDomain) data;
 122                         final BridgeDomainStatusAugmentation statusAugment =
 123                                 domain.getAugmentation(BridgeDomainStatusAugmentation.class);
 124                         final BridgeDomainStatus status = statusAugment.getBridgeDomainStatus();
 125                         switch (status) {
 126                             case Started: {
 127                                 LOG.debug("Bridge domain {} started", domain.getName());
 128                                 unregister(future.set(null));
 129                                 break;
 130                             }
 131                             case Failed: {
 132                                 LOG.warn("Bridge domain {} failed to start", domain.getName());
 133                                 unregister(future.set(null));
 134                                 break;
 135                             }
 136                             case Starting:
 137                             case Stopped: {
 138                                 LOG.debug("Bridge domain {} status changed to {}", domain.getName(), status.getName());
 139                                 break;
 140                             }
 141                         }
 142                     } else {
 143                         unregister(future.set(null));
 144                     }
 145                 }
 146             });
 147         }
 148
 149         private void unregister(boolean _true) {
 150             if (_true) {
 151                 LOG.debug("Unregistering listener for path {}", iid.getRootIdentifier());
 152                 if (registeredListener != null) {
 153                     registeredListener.close();
 154                 }
 155             }
 156         }
 157     }
 158
 159     public BridgeDomainManagerImpl(DataBroker dataProvider) {
 160         this.dataProvider = Preconditions.checkNotNull(dataProvider);
 161     }
 162
 163     private static NodeBuilder createBasicVppNodeBuilder(NodeId nodeId) {
 164         return new NodeBuilder().setNodeId(nodeId).setSupportingNode(Collections.singletonList(
 165                 new SupportingNodeBuilder().setTopologyRef(SUPPORTING_TOPOLOGY_NETCONF).setNodeRef(nodeId).build()));
 166     }
 167
 168     @Override
 169     public ListenableFuture<Void> createVxlanBridgeDomainOnVppNode(@Nonnull final String bridgeDomainName,
 170                                                                    @Nonnull final VxlanVni vni,
 171                                                                    @Nonnull final NodeId vppNodeId) {
 172         TopologyVbridgeAugment topologyAug = new TopologyVbridgeAugmentBuilder().setTunnelType(TunnelTypeVxlan.class)
 173                 .setArpTermination(false)
 174                 .setFlood(true)
 175                 .setForward(true)
 176                 .setLearn(true)
 177                 .setUnknownUnicastFlood(true)
 178                 .setTunnelParameters(new VxlanTunnelParametersBuilder().setVni(vni).build())
 179                 .build();
 180         return createBridgeDomainOnVppNode(bridgeDomainName, topologyAug,
 181                 createBasicVppNodeBuilder(vppNodeId).build());
 182     }
 183
 184     @Override
 185     public ListenableFuture<Void> createVlanBridgeDomainOnVppNode(@Nonnull final String bridgeDomainName,
 186                                                                   @Nonnull final VlanId vlanId,
 187                                                                   @Nonnull final NodeId vppNodeId) {
 188         TopologyVbridgeAugment topologyAug = new TopologyVbridgeAugmentBuilder().setTunnelType(TunnelTypeVlan.class)
 189                 .setArpTermination(false)
 190                 .setFlood(true)
 191                 .setForward(true)
 192                 .setLearn(true)
 193                 .setUnknownUnicastFlood(true)
 194                 .setTunnelParameters(
 195                         new VlanNetworkParametersBuilder().setVlanId(vlanId).setVlanType(_802dot1q.class).build())
 196                 .build();
 197         InstanceIdentifier<GbpBridgeDomain> bridgeDomainConfigIid = InstanceIdentifier.builder(Config.class)
 198                 .child(GbpBridgeDomain.class, new GbpBridgeDomainKey(bridgeDomainName))
 199                 .build();
 200         ReadOnlyTransaction rTx = dataProvider.newReadOnlyTransaction();
 201         CheckedFuture<Optional<GbpBridgeDomain>, ReadFailedException> futureTopology =
 202                 rTx.read(LogicalDatastoreType.CONFIGURATION, bridgeDomainConfigIid);
 203         rTx.close();
 204         return Futures.transform(futureTopology, new AsyncFunction<Optional<GbpBridgeDomain>, Void>() {
 205
 206             @Override
 207             public ListenableFuture<Void> apply(@Nonnull Optional<GbpBridgeDomain> optBridgeDomainConf) throws Exception {
 208                 if (optBridgeDomainConf.isPresent() && optBridgeDomainConf.get().getPhysicalLocationRef() != null) {
 209                     for (PhysicalLocationRef ref : optBridgeDomainConf.get().getPhysicalLocationRef()) {
 210                         if (!ref.getNodeId().equals(vppNodeId)) {
 211                             LOG.debug("Node {} is not referenced node, skipping", ref.getNodeId());
 212                             continue;
 213                         }
 214                         if (ref.getInterface() != null && ref.getInterface().size() > 0) {
 215                             NodeVbridgeVlanAugment vppNodeVlanAug = new NodeVbridgeVlanAugmentBuilder()
 216                                     .setSuperInterface(ref.getInterface().get(0)).build();
 217                             Node vppNode = createBasicVppNodeBuilder(vppNodeId)
 218                                     .addAugmentation(NodeVbridgeVlanAugment.class, vppNodeVlanAug).build();
 219                             return createBridgeDomainOnVppNode(bridgeDomainName, topologyAug, vppNode);
 220                         }
 221                     }
 222                 }
 223                 return Futures.immediateFailedFuture(
 224                         new Throwable("Failed to apply config for VLAN bridge domain " + bridgeDomainName));
 225             }
 226         });
 227     }
 228
 229     /**
 230      * Method checks whether bridge domain already exists in topology under its {@link TopologyId}. If not, BD is
 231      * written into CONF DS (request for VBD) and registers listener which awaits result from VBD. Result can be
 232      * checked in OPER DS as a {@link BridgeDomainStatus}. If status is {@link BridgeDomainStatus#Started}, listener
 233      * unregisters itself and bridge domain creation in VBD is considered successful.
 234      * <p>
 235      * Next part creates request for {@link BridgeMember} in topology CONF DS and registers listener listening on
 236      * topology OPER DS. If bridge member is created in VBD, listener is closed.
 237      * <p>
 238      * This process has limited time, limit is defined in {@link ForwardingManager#WAIT_FOR_BD_PROCESSING} to prevent
 239      * stuck if VBD processing fails in some point.
 240      *
 241      * @param bridgeDomainName serving as a topology-id
 242      * @param vBridgeAug       augmented data in BD
 243      * @param vppNode          transformed into bridge member
 244      * @return composed future which serves as a marker for caller method that the computation is done. If future is
 245      * not returned in time, {@link TimeoutException} will be thrown there.
 246      */
 247     private ListenableFuture<Void> createBridgeDomainOnVppNode(@Nonnull final String bridgeDomainName,
 248                                                                @Nonnull final TopologyVbridgeAugment vBridgeAug,
 249                                                                @Nonnull final Node vppNode) {
 250         LOG.info("Creating bridge domain {} on VPP node {}", bridgeDomainName, vppNode);
 251         final TopologyKey topologyKey = new TopologyKey(new TopologyId(bridgeDomainName));
 252         final ReadOnlyTransaction rTx = dataProvider.newReadOnlyTransaction();
 253         final InstanceIdentifier<Topology> topologyIid = VppIidFactory.getTopologyIid(topologyKey);
 254         final CheckedFuture<Optional<Topology>, ReadFailedException> optTopology =
 255                 rTx.read(LogicalDatastoreType.CONFIGURATION, topologyIid);
 256         rTx.close();
 257         return Futures.transform(optTopology, new AsyncFunction<Optional<Topology>, Void>() {
 258             @Override
 259             public ListenableFuture<Void> apply(@Nonnull final Optional<Topology> optTopology)
 260                     throws InterruptedException, ExecutionException {
 261                 // Topology
 262                 final SettableFuture<Void> topologyFuture = SettableFuture.create();
 263                 if (!optTopology.isPresent()) {
 264                     final WriteTransaction wTx = dataProvider.newWriteOnlyTransaction();
 265                     final Topology topology = new TopologyBuilder().setKey(topologyKey)
 266                             .setTopologyTypes(VBRIDGE_TOPOLOGY_TYPE)
 267                             .addAugmentation(TopologyVbridgeAugment.class, vBridgeAug)
 268                             .build();
 269                     wTx.put(LogicalDatastoreType.CONFIGURATION, topologyIid, topology, true);
 270                     Futures.addCallback(wTx.submit(), new FutureCallback<Void>() {
 271
 272                         @Override
 273                         public void onSuccess(@Nullable final Void result) {
 274                             final InstanceIdentifier<BridgeDomain> bridgeDomainStateIid =
 275                                     VppIidFactory.getBridgeDomainStateIid(new BridgeDomainKey(bridgeDomainName));
 276                             LOG.debug("Adding a listener on bridge domain state", bridgeDomainName);
 277                             final DataTreeIdentifier<BridgeDomain> bridgeDomainStateIidDTI = new DataTreeIdentifier<>(LogicalDatastoreType.OPERATIONAL,
 278                                     bridgeDomainStateIid);
 279                             new ListenableFutureSetter<>(dataProvider, topologyFuture, bridgeDomainStateIidDTI, ModificationType.WRITE);
 280                         }
 281
 282                         @Override
 283                         public void onFailure(@Nonnull Throwable t) {
 284                             LOG.warn("Request create topology for VBD was not stored to CONF DS. {}", topologyIid, t);
 285                             topologyFuture.setException(new Exception("Cannot send request to VBD."));
 286                         }
 287                     });
 288                 } else {
 289                     topologyFuture.set(null);
 290                     LOG.info("Bridge domain {} already exists", optTopology.get().getTopologyId());
 291                 }
 292                 return Futures.transform(topologyFuture, new AsyncFunction<Void, Void>() {
 293                     @Override
 294                     public ListenableFuture<Void> apply(@Nonnull Void topologyInput) throws Exception {
 295                         // Bridge member
 296                         final SettableFuture<Void> futureBridgeMember = SettableFuture.create();
 297                         final InstanceIdentifier<Node> nodeIid = VppIidFactory.getNodeIid(topologyKey, vppNode.getKey());
 298                         LOG.debug("Adding node {} to bridge domain {}", vppNode.getKey(), topologyKey.getTopologyId());
 299                         final WriteTransaction wTx = dataProvider.newWriteOnlyTransaction();
 300                         wTx.put(LogicalDatastoreType.CONFIGURATION, nodeIid, vppNode);
 301                         Futures.addCallback(wTx.submit(), new FutureCallback<Void>() {
 302
 303                             @Override
 304                             public void onSuccess(@Nullable final Void _void) {
 305                                 final DataTreeIdentifier<BridgeMember> bridgeMemberIid =
 306                                         new DataTreeIdentifier<>(LogicalDatastoreType.OPERATIONAL,
 307                                                 nodeIid.augmentation(NodeVbridgeAugment.class).child(BridgeMember.class));
 308                                 LOG.debug("Request create node in topology for VBD was stored to CONF DS. {}", nodeIid);
 309                                 new ListenableFutureSetter<>(dataProvider, futureBridgeMember, bridgeMemberIid,
 310                                         ModificationType.WRITE);
 311                             }
 312
 313                             @Override
 314                             public void onFailure(@Nonnull final Throwable t) {
 315                                 LOG.warn("Request create node in topology for VBD was not stored to CONF DS. {}", nodeIid, t);
 316                                 futureBridgeMember.setException(new Exception("Cannot send request to VBD."));
 317                             }
 318                         });
 319                         return futureBridgeMember;
 320                     }
 321                 });
 322             }
 323         });
 324     }
 325
 326     @Override
 327     public ListenableFuture<Void> removeBridgeDomainFromVppNode(@Nonnull final String bridgeDomainName,
 328                                                                 @Nonnull final NodeId vppNode) {
 329         LOG.info("Removing bridge domain {} from VPP node {}", bridgeDomainName, vppNode);
 330         InstanceIdentifier<Topology> topologyIid =
 331                 VppIidFactory.getTopologyIid(new TopologyKey(new TopologyId(bridgeDomainName)));
 332         ReadOnlyTransaction rTx = dataProvider.newReadOnlyTransaction();
 333         Optional<Topology> topologyOpt =
 334                 DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION, topologyIid, rTx);
 335         WriteTransaction wTx = dataProvider.newWriteOnlyTransaction();
 336         InstanceIdentifier<Node> nodeIid =
 337                 VppIidFactory.getNodeIid(new TopologyKey(new TopologyId(bridgeDomainName)), new NodeKey(vppNode));
 338         wTx.delete(LogicalDatastoreType.CONFIGURATION, nodeIid);
 339         if (topologyOpt.isPresent()) {
 340             Topology topology = topologyOpt.get();
 341             if(topology.getNode() == null || topology.getNode().size() == 1) {
 342                 wTx.delete(LogicalDatastoreType.CONFIGURATION, topologyIid);
 343             }
 344         }
 345         SettableFuture<Void> future = SettableFuture.create();
 346         Futures.addCallback(wTx.submit(), new FutureCallback<Void>() {
 347
 348             @Override
 349             public void onSuccess(Void result) {
 350                 DataTreeIdentifier<BridgeMember> bridgeMemberIid =
 351                         new DataTreeIdentifier<>(LogicalDatastoreType.OPERATIONAL,
 352                                 nodeIid.augmentation(NodeVbridgeAugment.class).child(BridgeMember.class));
 353                 LOG.debug("Request delete node in topology for VBD was stored to CONF DS. {}", nodeIid);
 354                 new ListenableFutureSetter<>(dataProvider, future, bridgeMemberIid, ModificationType.DELETE);
 355             }
 356
 357             @Override
 358             public void onFailure(@Nonnull Throwable t) {
 359                 LOG.warn("Request delete node in topology for VBD was not stored to CONF DS. {}", nodeIid, t);
 360                 future.setException(new Exception("Cannot send request to VBD."));
 361             }
 362         });
 363         return future;
 364     }
 365 }