neutron-ovsdb/src/main/java/org/opendaylight/groupbasedpolicy/neutron/ovsdb/TerminationPointDataChangeListener.java

   1 /*
   2  * Copyright (c) 2015 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.neutron.ovsdb;
  10
  11 import static com.google.common.base.Preconditions.checkNotNull;
  12 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.EndpointHelper.lookupEndpoint;
  13 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.EndpointHelper.updateEndpointRemoveLocation;
  14 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.EndpointHelper.updateEndpointWithLocation;
  15 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.InventoryHelper.checkOfOverlayConfig;
  16 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.InventoryHelper.getInventoryNodeConnectorIdString;
  17 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.InventoryHelper.getInventoryNodeIdString;
  18 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.InventoryHelper.removeTunnelsOfOverlayConfig;
  19 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.InventoryHelper.updateOfOverlayConfig;
  20 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.NeutronHelper.getEpKeyFromNeutronMapper;
  21 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.OvsdbHelper.createTunnelPort;
  22 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.OvsdbHelper.getManagerNode;
  23 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.OvsdbHelper.getOvsdbBridgeFromTerminationPoint;
  24 import static org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.OvsdbHelper.getTopologyNode;
  25
  26 import java.util.ArrayList;
  27 import java.util.Collection;
  28 import java.util.Collections;
  29 import java.util.HashMap;
  30 import java.util.List;
  31 import java.util.Map;
  32 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  33 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  34 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  35 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  36 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  37 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  38 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  39 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  40 import org.opendaylight.ovsdb.southbound.SouthboundConstants;
  41 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.UniqueId;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.EndpointService;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.Endpoint;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointKey;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbBridgeAugmentation;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbNodeAugmentation;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbTerminationPointAugmentation;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.ovsdb.port._interface.attributes.InterfaceExternalIds;
  51 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  52 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  53 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  54 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  55 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
  56 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  57 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  58 import org.slf4j.Logger;
  59 import org.slf4j.LoggerFactory;
  60
  61 public class TerminationPointDataChangeListener implements DataTreeChangeListener<OvsdbTerminationPointAugmentation>,
  62         AutoCloseable {
  63
  64     private static final String NEUTRON_EXTERNAL_ID_KEY = "iface-id";
  65     private final ListenerRegistration<?> registration;
  66     private final DataBroker dataBroker;
  67     private final EndpointService epService;
  68     private static final Logger LOG = LoggerFactory.getLogger(TerminationPointDataChangeListener.class);
  69     private final List<AbstractTunnelType> requiredTunnelTypes;
  70
  71     public TerminationPointDataChangeListener(DataBroker dataBroker, EndpointService epService) {
  72         this.dataBroker = checkNotNull(dataBroker);
  73         this.epService = checkNotNull(epService);
  74         InstanceIdentifier<OvsdbTerminationPointAugmentation> iid = InstanceIdentifier.create(NetworkTopology.class)
  75             .child(Topology.class, new TopologyKey(SouthboundConstants.OVSDB_TOPOLOGY_ID))
  76             .child(Node.class)
  77             .child(TerminationPoint.class)
  78             .augmentation(OvsdbTerminationPointAugmentation.class);
  79         registration = dataBroker.registerDataTreeChangeListener(new DataTreeIdentifier<>(
  80                 LogicalDatastoreType.OPERATIONAL, iid), this);
  81         requiredTunnelTypes = createSupportedTunnelsList();
  82     }
  83
  84     private List<AbstractTunnelType> createSupportedTunnelsList() {
  85         List<AbstractTunnelType> required = new ArrayList<>();
  86         required.add(new VxlanTunnelType());
  87         required.add(new VxlanGpeTunnelType());
  88         return Collections.unmodifiableList(required);
  89     }
  90
  91     @Override
  92     public void close() throws Exception {
  93         registration.close();
  94     }
  95
  96     /*
  97      * When vSwitch is deleted, we loose data in operational DS to determine Iid of
  98      * corresponding NodeId.
  99      */
 100     private static final Map<InstanceIdentifier<OvsdbTerminationPointAugmentation>, NodeId> NODE_ID_BY_TERMIN_POINT =
 101             new HashMap<>();
 102
 103     @Override
 104     public void onDataTreeChanged(Collection<DataTreeModification<OvsdbTerminationPointAugmentation>> changes) {
 105         for (DataTreeModification<OvsdbTerminationPointAugmentation> change: changes) {
 106             DataObjectModification<OvsdbTerminationPointAugmentation> rootNode = change.getRootNode();
 107             InstanceIdentifier<OvsdbTerminationPointAugmentation> ovsdbTpIid = change.getRootPath().getRootIdentifier();
 108             OvsdbTerminationPointAugmentation origOvsdbTp = rootNode.getDataBefore();
 109             switch (rootNode.getModificationType()) {
 110                 case SUBTREE_MODIFIED:
 111                 case WRITE:
 112                     OvsdbTerminationPointAugmentation updatedOvsdbTp = rootNode.getDataAfter();
 113                     OvsdbBridgeAugmentation ovsdbBridge = getOvsdbBridgeFromTerminationPoint(ovsdbTpIid, dataBroker);
 114                     if (origOvsdbTp == null) {
 115                         NODE_ID_BY_TERMIN_POINT.put(ovsdbTpIid,
 116                                 new NodeId(getInventoryNodeIdString(ovsdbBridge, ovsdbTpIid, dataBroker)));
 117                     }
 118
 119                     processOvsdbBridge(ovsdbBridge, updatedOvsdbTp, ovsdbTpIid);
 120                     break;
 121                 case DELETE:
 122                     processRemovedTp(NODE_ID_BY_TERMIN_POINT.get(ovsdbTpIid), origOvsdbTp, ovsdbTpIid);
 123                     break;
 124                 default:
 125                     break;
 126             }
 127         }
 128     }
 129
 130     private void processOvsdbBridge(OvsdbBridgeAugmentation ovsdbBridge, OvsdbTerminationPointAugmentation ovsdbTp,
 131             InstanceIdentifier<OvsdbTerminationPointAugmentation> ovsdbTpIid) {
 132
 133         checkNotNull(ovsdbBridge);
 134         if (ovsdbBridge.getBridgeName().getValue().equals(ovsdbTp.getName())) {
 135             LOG.debug("Termination Point {} same as Bridge {}. Not processing", ovsdbTp.getName(),
 136                     ovsdbBridge.getBridgeName().getValue());
 137             return;
 138         }
 139
 140         String nodeIdString = getInventoryNodeIdString(ovsdbBridge, ovsdbTpIid, dataBroker);
 141         if (nodeIdString == null) {
 142             LOG.debug("nodeIdString for TerminationPoint {} was null", ovsdbTp);
 143             return;
 144         }
 145         String nodeConnectorIdString = getInventoryNodeConnectorIdString(nodeIdString, ovsdbTp, ovsdbTpIid, dataBroker);
 146         if (nodeConnectorIdString == null) {
 147             LOG.debug("nodeConnectorIdString for TerminationPoint {} was null", ovsdbTp);
 148             return;
 149         }
 150
 151         InstanceIdentifier<Node> nodeIid = ovsdbTpIid.firstIdentifierOf(Node.class);
 152         String externalId = getNeutronPortUuid(ovsdbTp);
 153         Endpoint ep = null;
 154         IpAddress hostIp = getIpFromOvsdb(ovsdbBridge);
 155
 156         /*
 157          * Ports created by Nova have an external_id field
 158          * in them, which is the Neutron port UUID. If a port
 159          * has an external_id, get the EndpointKey for the
 160          * Neutron port UUID from neutron-mapper, then look
 161          * up the Endpoint in the Endpoint Registry using
 162          * that key an update it with the location information
 163          * (NodeId and NodeConnectorId from the inventory model)
 164          * and the port name, constructed using the port UUID.
 165          */
 166
 167         if (externalId != null) {
 168             EndpointKey epKey = getEpKeyFromNeutronMapper(new UniqueId(externalId), dataBroker);
 169             if (epKey == null) {
 170                 LOG.debug("TerminationPoint {} with external ID {} is not in Neutron Map", ovsdbTp, externalId);
 171                 return;
 172             }
 173             ReadOnlyTransaction transaction = dataBroker.newReadOnlyTransaction();
 174             ep = lookupEndpoint(epKey, transaction);
 175             if (ep == null) {
 176                 LOG.warn("TerminationPoint {} with external ID {} is in Neutron Map, "
 177                     + "but corresponding Endpoint {} isn't in Endpoint Repository", ovsdbTp, externalId, epKey);
 178                 return;
 179             }
 180             /*
 181              * Look up the Node in Inventory that corresponds to the
 182              * Topology Node that owns this Termination Point (port),
 183              * and see if it already is configured with a complete
 184              * OfOverlay augmentation. If it hasn't, go see if the
 185              * tunnel ports exist, and if not, go and create them.
 186              */
 187             if (!checkOfOverlayConfig(nodeIdString, requiredTunnelTypes, dataBroker)) {
 188                 checkNotNull(nodeIid);
 189                 /*
 190                  * Check to see if we need to create a
 191                  * tunnel port on the parent node
 192                  */
 193                 createTunnelPorts(nodeIid);
 194             }
 195         } else {
 196             LOG.debug("TerminationPoint {} had no external ID, not processing for external ID.", ovsdbTp);
 197
 198         }
 199
 200         /*
 201          * This may be a notification for a tunnel we just created.
 202          * In that case, we need to update the Inventory Node's OfOverlay
 203          * augmentation with missing information
 204          */
 205         AbstractTunnelType tunnel = getTunnelType(ovsdbTp, requiredTunnelTypes);
 206         if (tunnel != null) {
 207             updateOfOverlayConfig(hostIp, nodeIdString, nodeConnectorIdString, tunnel, dataBroker);
 208         }
 209         if (externalId != null) {
 210             ReadWriteTransaction rwTx = dataBroker.newReadWriteTransaction();
 211             updateEndpointWithLocation(ep, nodeIdString, nodeConnectorIdString, rwTx);
 212         }
 213     }
 214
 215     /**
 216      * If removed termination point was a tunnel port,
 217      * removes attached tunnels (namely Vxlan-type) from OVSDB bridge,
 218      * else removes location info from TP.
 219      *
 220      * @param nodeId {@link NodeId}
 221      * @param ovsdbTp {@link OvsdbTerminationPointAugmentation}
 222      * @param ovsdbTpIid termination point's IID {@link InstanceIdentifier}
 223      */
 224     private void processRemovedTp(NodeId nodeId, OvsdbTerminationPointAugmentation ovsdbTp,
 225             InstanceIdentifier<OvsdbTerminationPointAugmentation> ovsdbTpIid) {
 226         if (isTunnelPort(ovsdbTp, requiredTunnelTypes)) {
 227             removeTunnelsOfOverlayConfig(nodeId.getValue(), requiredTunnelTypes, dataBroker);
 228         } else {
 229             deleteLocationForTp(ovsdbTp);
 230         }
 231     }
 232
 233     /**
 234      * Delete location on EP for given TP.
 235      *
 236      * @param ovsdbTp {@link OvsdbTerminationPointAugmentation}
 237      */
 238     private void deleteLocationForTp(OvsdbTerminationPointAugmentation ovsdbTp) {
 239         String externalId = getNeutronPortUuid(ovsdbTp);
 240         if (externalId != null) {
 241             EndpointKey epKey = getEpKeyFromNeutronMapper(new UniqueId(externalId), dataBroker);
 242             if (epKey == null) {
 243                 LOG.debug("TerminationPoint {} with external ID {} is not in Neutron Map.", ovsdbTp, externalId);
 244                 return;
 245             }
 246             ReadOnlyTransaction readOnlyTransaction = dataBroker.newReadOnlyTransaction();
 247             Endpoint ep = lookupEndpoint(epKey, readOnlyTransaction);
 248             readOnlyTransaction.close();
 249             if (ep == null) {
 250                 LOG.warn("TerminationPoint {} with external ID {} is in Neutron Map,"
 251                     + " but corresponding Endpoint {} isn't in Endpoint Repository.", ovsdbTp, externalId, epKey);
 252                 return;
 253             }
 254             updateEndpointRemoveLocation(ep, dataBroker.newReadWriteTransaction());
 255         } else {
 256             LOG.debug("TerminationPoint {} has no external ID, not processing.", ovsdbTp);
 257         }
 258     }
 259
 260     /**
 261      * Check to see if the {@link OvsdbTerminationPointAugmentation} is also a Tunnel port that we
 262      * care about.
 263      *
 264      * @param ovsdbTp {@link OvsdbTerminationPointAugmentation}
 265      * @param requiredTunnelTypes {@link List} of tunnel types
 266      */
 267     private static AbstractTunnelType getTunnelType(OvsdbTerminationPointAugmentation ovsdbTp,
 268             List<AbstractTunnelType> requiredTunnelTypes) {
 269         if (ovsdbTp.getInterfaceType() != null) {
 270             for (AbstractTunnelType tunnelType : requiredTunnelTypes) {
 271                 if (tunnelType.isValidTunnelPort(ovsdbTp)) {
 272                     return tunnelType;
 273                 }
 274             }
 275         }
 276         return null;
 277     }
 278
 279     /*
 280      * Check to see if the {@link OvsdbTerminationPointAugmentation}
 281      * is also a Tunnel port that we care about.
 282      *
 283      * @param ovsdbTp {@link OvsdbTerminationPointAugmentation}
 284      *
 285      * @param requiredTunnelTypes {@link List} of tunnel types
 286      *
 287      * @return true if it's a required tunnel port, false if it isn't
 288      */
 289     private static boolean isTunnelPort(OvsdbTerminationPointAugmentation ovsdbTp,
 290             List<AbstractTunnelType> requiredTunnelTypes) {
 291         if (ovsdbTp.getInterfaceType() != null) {
 292             for (AbstractTunnelType tunnelType : requiredTunnelTypes) {
 293                 if (tunnelType.isValidTunnelPort(ovsdbTp)) {
 294                     return true;
 295                 }
 296             }
 297         }
 298         return false;
 299     }
 300
 301     /**
 302      * Get the Neutron Port UUID from an {@link OvsdbTerminationPointAugmentation}.
 303      * The Neutron Port UUID is stored as an "external-id" in the termination point.
 304      *
 305      * @param ovsdbTp The {@link OvsdbTerminationPointAugmentation}
 306      * @return The String representation of the Neutron Port UUID, null if not present
 307      */
 308     private String getNeutronPortUuid(OvsdbTerminationPointAugmentation ovsdbTp) {
 309         if (ovsdbTp.getInterfaceExternalIds() == null) {
 310             return null;
 311         }
 312         for (InterfaceExternalIds id : ovsdbTp.getInterfaceExternalIds()) {
 313             if (id.getExternalIdKey() != null && id.getExternalIdKey().equals(NEUTRON_EXTERNAL_ID_KEY)) {
 314
 315                 if (id.getExternalIdValue() != null) {
 316                     return id.getExternalIdValue();
 317                 }
 318             }
 319         }
 320         return null;
 321     }
 322
 323     /**
 324      * Check to see if all tunnel ports are present, and if not,
 325      * create them.
 326      *
 327      * @param nodeIid {@link InstanceIdentifier}
 328      */
 329     private void createTunnelPorts(InstanceIdentifier<Node> nodeIid) {
 330
 331         Node node = getTopologyNode(nodeIid, dataBroker);
 332         checkNotNull(node);
 333
 334         if (node.getAugmentation(OvsdbBridgeAugmentation.class) == null) {
 335             LOG.trace("Node {} is not an OVSDB manageable node", nodeIid);
 336             return;
 337         }
 338
 339         /*
 340          * See if this Topology Node has the required tunnel ports,
 341          * and if not, go and create them
 342          */
 343         for (AbstractTunnelType tunnelType : requiredTunnelTypes) {
 344             boolean tunnelPresent = false;
 345             for (TerminationPoint tp : node.getTerminationPoint()) {
 346                 OvsdbTerminationPointAugmentation tpAug = tp.getAugmentation(OvsdbTerminationPointAugmentation.class);
 347
 348                 checkNotNull(tpAug);
 349
 350                 if (tunnelType.isValidTunnelPort(tpAug)) {
 351                     tunnelPresent = true;
 352                     break;
 353                 }
 354             }
 355             if (!tunnelPresent) {
 356                 createTunnelPort(nodeIid, node, tunnelType, dataBroker);
 357             }
 358         }
 359     }
 360
 361     /**
 362      * Get the IP address of the host that owns the {@link OvsdbBridgeAugmentation}.
 363      *
 364      * @param ovsdbBridge The OVSDB bridge node
 365      * @return The IP address of the host that the bridge is on
 366      */
 367     private IpAddress getIpFromOvsdb(OvsdbBridgeAugmentation ovsdbBridge) {
 368         /*
 369          * The manager Node referenced by this node has the
 370          * IP address.
 371          */
 372         OvsdbNodeAugmentation managerNode = getManagerNode(ovsdbBridge, dataBroker);
 373
 374         if (managerNode == null) {
 375             return null;
 376         }
 377
 378         if (managerNode.getConnectionInfo() != null) {
 379             return managerNode.getConnectionInfo().getRemoteIp();
 380         }
 381         return null;
 382     }
 383 }