openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/role/RoleManagerImpl.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 package org.opendaylight.openflowplugin.impl.role;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.base.Verify;
  13 import com.google.common.collect.Iterators;
  14 import com.google.common.util.concurrent.CheckedFuture;
  15 import com.google.common.util.concurrent.FutureCallback;
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.JdkFutureAdapters;
  18 import com.google.common.util.concurrent.ListenableFuture;
  19 import io.netty.util.TimerTask;
  20 import java.util.ArrayList;
  21 import java.util.Iterator;
  22 import java.util.List;
  23 import java.util.concurrent.ConcurrentHashMap;
  24 import java.util.concurrent.ConcurrentMap;
  25 import java.util.concurrent.Future;
  26 import java.util.concurrent.TimeUnit;
  27 import javax.annotation.CheckForNull;
  28 import javax.annotation.Nonnull;
  29 import javax.annotation.Nullable;
  30 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  31 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  32 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
  33 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipChange;
  34 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListener;
  35 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListenerRegistration;
  36 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
  37 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  38 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  39 import org.opendaylight.openflowplugin.api.OFConstants;
  40 import org.opendaylight.openflowplugin.api.openflow.OFPContext;
  41 import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
  42 import org.opendaylight.openflowplugin.api.openflow.device.DeviceInfo;
  43 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceInitializationPhaseHandler;
  44 import org.opendaylight.openflowplugin.api.openflow.device.handlers.DeviceTerminationPhaseHandler;
  45 import org.opendaylight.openflowplugin.api.openflow.lifecycle.LifecycleConductor;
  46 import org.opendaylight.openflowplugin.api.openflow.lifecycle.RoleChangeListener;
  47 import org.opendaylight.openflowplugin.api.openflow.lifecycle.ServiceChangeListener;
  48 import org.opendaylight.openflowplugin.api.openflow.role.RoleContext;
  49 import org.opendaylight.openflowplugin.api.openflow.role.RoleManager;
  50 import org.opendaylight.openflowplugin.impl.services.SalRoleServiceImpl;
  51 import org.opendaylight.openflowplugin.impl.util.DeviceStateUtil;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.OfpRole;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleInput;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleInputBuilder;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleOutput;
  58 import org.opendaylight.yangtools.yang.common.RpcResult;
  59 import org.slf4j.Logger;
  60 import org.slf4j.LoggerFactory;
  61
  62 /**
  63  * Gets invoked from RpcManagerInitial, registers a candidate with EntityOwnershipService.
  64  * On receipt of the ownership notification, makes an rpc call to SalRoleService.
  65  *
  66  * Hands over to StatisticsManager at the end.
  67  */
  68 public class RoleManagerImpl implements RoleManager, EntityOwnershipListener, ServiceChangeListener {
  69     private static final Logger LOG = LoggerFactory.getLogger(RoleManagerImpl.class);
  70
  71     // Maximum limit of timeout retries when cleaning DS, to prevent infinite recursive loops
  72     private static final int MAX_CLEAN_DS_RETRIES = 3;
  73
  74     private DeviceInitializationPhaseHandler deviceInitializationPhaseHandler;
  75     private DeviceTerminationPhaseHandler deviceTerminationPhaseHandler;
  76     private final DataBroker dataBroker;
  77     private final EntityOwnershipService entityOwnershipService;
  78     private final ConcurrentMap<DeviceInfo, RoleContext> contexts = new ConcurrentHashMap<>();
  79     private final ConcurrentMap<Entity, RoleContext> watchingEntities = new ConcurrentHashMap<>();
  80     private final EntityOwnershipListenerRegistration entityOwnershipListenerRegistration;
  81     private final EntityOwnershipListenerRegistration txEntityOwnershipListenerRegistration;
  82     private List<RoleChangeListener> listeners = new ArrayList<>();
  83
  84     private final LifecycleConductor conductor;
  85
  86     public RoleManagerImpl(final EntityOwnershipService entityOwnershipService, final DataBroker dataBroker, final LifecycleConductor lifecycleConductor) {
  87         this.entityOwnershipService = Preconditions.checkNotNull(entityOwnershipService);
  88         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  89         this.entityOwnershipListenerRegistration = Preconditions.checkNotNull(entityOwnershipService.registerListener(RoleManager.ENTITY_TYPE, this));
  90         this.txEntityOwnershipListenerRegistration = Preconditions.checkNotNull(entityOwnershipService.registerListener(TX_ENTITY_TYPE, this));
  91         this.conductor = lifecycleConductor;
  92         LOG.debug("Register OpenflowOwnershipListener to all entity ownership changes");
  93     }
  94
  95     @Override
  96     public void setDeviceInitializationPhaseHandler(final DeviceInitializationPhaseHandler handler) {
  97         deviceInitializationPhaseHandler = handler;
  98     }
  99
 100     @Override
 101     public void onDeviceContextLevelUp(@CheckForNull final DeviceInfo deviceInfo) throws Exception {
 102         final DeviceContext deviceContext = Preconditions.checkNotNull(conductor.getDeviceContext(deviceInfo));
 103         final RoleContext roleContext = new RoleContextImpl(deviceInfo, entityOwnershipService, makeEntity(deviceInfo.getNodeId()), makeTxEntity(deviceInfo.getNodeId()), conductor);
 104         roleContext.setSalRoleService(new SalRoleServiceImpl(roleContext, deviceContext));
 105         Verify.verify(contexts.putIfAbsent(deviceInfo, roleContext) == null, "Role context for master Node %s is still not closed.", deviceInfo.getNodeId());
 106         makeDeviceRoleChange(OfpRole.BECOMESLAVE, roleContext, true);
 107         /* First start to watch entity so we don't miss any notification, and then try to register in EOS */
 108         watchingEntities.put(roleContext.getEntity(), roleContext);
 109         notifyListenersRoleInitializationDone(roleContext.getDeviceInfo(), roleContext.initialization());
 110         deviceInitializationPhaseHandler.onDeviceContextLevelUp(deviceInfo);
 111     }
 112
 113     @Override
 114     public void close() {
 115         LOG.debug("Close method on role manager was called.");
 116         entityOwnershipListenerRegistration.close();
 117         txEntityOwnershipListenerRegistration.close();
 118         for (final Iterator<RoleContext> iterator = Iterators.consumingIterator(contexts.values().iterator()); iterator.hasNext();) {
 119             // got here because last known role is LEADER and DS might need clearing up
 120             final RoleContext roleContext = iterator.next();
 121             watchingEntities.remove(roleContext.getEntity());
 122             watchingEntities.remove(roleContext.getTxEntity());
 123             contexts.remove(roleContext.getDeviceInfo());
 124             if (roleContext.isTxCandidateRegistered()) {
 125                 LOG.info("Node {} was holder txEntity, so trying to remove device from operational DS.");
 126                 removeDeviceFromOperationalDS(roleContext.getDeviceInfo(), MAX_CLEAN_DS_RETRIES);
 127             } else {
 128                 roleContext.close();
 129             }
 130         }
 131     }
 132
 133     @Override
 134     public void onDeviceContextLevelDown(final DeviceInfo deviceInfo) {
 135         LOG.trace("onDeviceContextLevelDown for node {}", deviceInfo.getNodeId());
 136         final RoleContext roleContext = contexts.get(deviceInfo);
 137         if (roleContext != null) {
 138             LOG.debug("Found roleContext associated to deviceContext: {}, now trying close the roleContext", deviceInfo.getNodeId());
 139             if (roleContext.isMainCandidateRegistered()) {
 140                 roleContext.unregisterCandidate(roleContext.getEntity());
 141             } else {
 142                 contexts.remove(deviceInfo.getNodeId(), roleContext);
 143                 roleContext.close();
 144             }
 145         }
 146         deviceTerminationPhaseHandler.onDeviceContextLevelDown(deviceInfo);
 147     }
 148
 149     @VisibleForTesting
 150     static Entity makeEntity(final NodeId nodeId) {
 151         return new Entity(RoleManager.ENTITY_TYPE, nodeId.getValue());
 152     }
 153
 154     @VisibleForTesting
 155     static Entity makeTxEntity(final NodeId nodeId) {
 156         return new Entity(RoleManager.TX_ENTITY_TYPE, nodeId.getValue());
 157     }
 158
 159     @Override
 160     public void ownershipChanged(final EntityOwnershipChange ownershipChange) {
 161
 162         Preconditions.checkArgument(ownershipChange != null);
 163         final RoleContext roleContext = watchingEntities.get(ownershipChange.getEntity());
 164
 165         LOG.debug("Received EOS message: wasOwner:{} isOwner:{} hasOwner:{} inJeopardy:{} for entity type {} and node {}",
 166                 ownershipChange.wasOwner(), ownershipChange.isOwner(), ownershipChange.hasOwner(), ownershipChange.inJeopardy(),
 167                 ownershipChange.getEntity().getType(),
 168                 roleContext != null ? roleContext.getDeviceInfo().getNodeId() : "-> no watching entity, disregarding notification <-");
 169
 170         if (roleContext != null) {
 171             if (ownershipChange.getEntity().equals(roleContext.getEntity())) {
 172                 changeOwnershipForMainEntity(ownershipChange, roleContext);
 173             } else {
 174                 changeOwnershipForTxEntity(ownershipChange, roleContext);
 175             }
 176         } else {
 177             LOG.debug("OwnershipChange {}", ownershipChange);
 178         }
 179
 180     }
 181
 182     @VisibleForTesting
 183     void changeOwnershipForMainEntity(final EntityOwnershipChange ownershipChange, final RoleContext roleContext) {
 184
 185         if (roleContext.isMainCandidateRegistered()) {
 186             LOG.debug("Main-EntityOwnershipRegistration is active for entity type {} and node {}",
 187                     ownershipChange.getEntity().getType(), roleContext.getDeviceInfo().getNodeId());
 188             if (!ownershipChange.wasOwner() && ownershipChange.isOwner() && !ownershipChange.inJeopardy()) {
 189                 // SLAVE -> MASTER
 190                 LOG.debug("SLAVE to MASTER for node {}", roleContext.getDeviceInfo().getNodeId());
 191                 if (roleContext.registerCandidate(roleContext.getTxEntity())) {
 192                     LOG.debug("Starting watching tx entity for node {}", roleContext.getDeviceInfo().getNodeId());
 193                     watchingEntities.putIfAbsent(roleContext.getTxEntity(), roleContext);
 194                 }
 195             } else if ((ownershipChange.wasOwner() && !ownershipChange.isOwner()) || (ownershipChange.inJeopardy())) {
 196                 // MASTER -> SLAVE
 197                 LOG.debug("MASTER to SLAVE for node {}", roleContext.getDeviceInfo().getNodeId());
 198                 conductor.addOneTimeListenerWhenServicesChangesDone(this, roleContext.getDeviceInfo());
 199                 makeDeviceRoleChange(OfpRole.BECOMESLAVE, roleContext, false);
 200             }
 201         } else {
 202             LOG.debug("Main-EntityOwnershipRegistration is not active for entity type {} and node {}",
 203                     ownershipChange.getEntity(), roleContext.getDeviceInfo().getNodeId());
 204             watchingEntities.remove(ownershipChange.getEntity(), roleContext);
 205             if (roleContext.isTxCandidateRegistered()) {
 206                 LOG.debug("tx candidate still registered for node {}, probably connection lost, trying to unregister tx candidate", roleContext.getDeviceInfo().getNodeId());
 207                 roleContext.unregisterCandidate(roleContext.getTxEntity());
 208                 if (ownershipChange.wasOwner() && !ownershipChange.isOwner() && !ownershipChange.hasOwner()) {
 209                     LOG.debug("Trying to remove from operational node: {}", roleContext.getDeviceInfo().getNodeId());
 210                     removeDeviceFromOperationalDS(roleContext.getDeviceInfo(), MAX_CLEAN_DS_RETRIES);
 211                 }
 212             } else {
 213                 contexts.remove(roleContext.getDeviceInfo(), roleContext);
 214                 roleContext.close();
 215                 conductor.closeConnection(roleContext.getDeviceInfo());
 216             }
 217         }
 218     }
 219
 220     @VisibleForTesting
 221     void changeOwnershipForTxEntity(final EntityOwnershipChange ownershipChange,
 222             @Nonnull final RoleContext roleContext) {
 223
 224         if (roleContext.isTxCandidateRegistered()) {
 225             LOG.debug("Tx-EntityOwnershipRegistration is active for entity type {} and node {}",
 226                     ownershipChange.getEntity().getType(),
 227                     roleContext.getDeviceInfo().getNodeId());
 228             if (ownershipChange.inJeopardy()) {
 229                 LOG.warn("Getting 'inJeopardy' flag from EOS. Removing txCandidate and stopping watching txCandidate.");
 230                 watchingEntities.remove(roleContext.getTxEntity());
 231                 roleContext.unregisterCandidate(roleContext.getTxEntity());
 232             } else {
 233                 if (!ownershipChange.wasOwner() && ownershipChange.isOwner()) {
 234                     // SLAVE -> MASTER
 235                     LOG.debug("SLAVE to MASTER for node {}", roleContext.getDeviceInfo().getNodeId());
 236                     makeDeviceRoleChange(OfpRole.BECOMEMASTER, roleContext, false);
 237                 } else if (ownershipChange.wasOwner() && !ownershipChange.isOwner()) {
 238                     // MASTER -> SLAVE
 239                     LOG.debug("MASTER to SLAVE for node {}", roleContext.getDeviceInfo().getNodeId());
 240                     LOG.warn("Tx-EntityOwnershipRegistration lost leadership entity type {} and node {}",
 241                             ownershipChange.getEntity().getType(), roleContext.getDeviceInfo().getNodeId());
 242                     watchingEntities.remove(roleContext.getTxEntity(), roleContext);
 243                     watchingEntities.remove(roleContext.getEntity(), roleContext);
 244                     roleContext.unregisterCandidate(roleContext.getEntity());
 245                     roleContext.unregisterCandidate(roleContext.getTxEntity());
 246                     if (!ownershipChange.hasOwner()) {
 247                         LOG.debug("Trying to remove from operational node: {}", roleContext.getDeviceInfo().getNodeId());
 248                         removeDeviceFromOperationalDS(roleContext.getDeviceInfo(), MAX_CLEAN_DS_RETRIES);
 249                     } else {
 250                         final NodeId nodeId = roleContext.getDeviceInfo().getNodeId();
 251                         contexts.remove(roleContext.getDeviceInfo(), roleContext);
 252                         roleContext.close();
 253                         conductor.closeConnection(roleContext.getDeviceInfo());
 254                     }
 255                 }
 256             }
 257         } else {
 258             LOG.debug("Tx-EntityOwnershipRegistration is not active for entity type {} and node {}", ownershipChange.getEntity().getType(), roleContext.getDeviceInfo().getNodeId());
 259             watchingEntities.remove(roleContext.getTxEntity(), roleContext);
 260             contexts.remove(roleContext.getDeviceInfo(), roleContext);
 261             roleContext.close();
 262             conductor.closeConnection(roleContext.getDeviceInfo());
 263         }
 264     }
 265
 266     @VisibleForTesting
 267     void makeDeviceRoleChange(final OfpRole role, final RoleContext roleContext, final Boolean init) {
 268         final ListenableFuture<RpcResult<SetRoleOutput>> roleChangeFuture = sendRoleChangeToDevice(role, roleContext);
 269         Futures.addCallback(roleChangeFuture, new FutureCallback<RpcResult<SetRoleOutput>>() {
 270             @Override
 271             public void onSuccess(@Nullable final RpcResult<SetRoleOutput> setRoleOutputRpcResult) {
 272                 LOG.info("Role {} successfully set on device {}", role, roleContext.getDeviceInfo().getNodeId());
 273                 if (!init) {
 274                     notifyListenersRoleChangeOnDevice(roleContext.getDeviceInfo(), role);
 275                 }
 276             }
 277
 278             @Override
 279             public void onFailure(@Nonnull final Throwable throwable) {
 280                 LOG.warn("Unable to set role {} on device {}", role, roleContext.getDeviceInfo().getNodeId());
 281                 conductor.closeConnection(roleContext.getDeviceInfo());
 282             }
 283         });
 284     }
 285
 286     @VisibleForTesting
 287     ListenableFuture<RpcResult<SetRoleOutput>> sendRoleChangeToDevice(final OfpRole newRole, final RoleContext roleContext) {
 288         LOG.debug("Sending new role {} to device {}", newRole, roleContext.getDeviceInfo().getNodeId());
 289         final Future<RpcResult<SetRoleOutput>> setRoleOutputFuture;
 290         final Short version = roleContext.getDeviceInfo().getVersion();
 291         if (null == version) {
 292             LOG.debug("Device version is null");
 293             return Futures.immediateFuture(null);
 294         }
 295         if (version < OFConstants.OFP_VERSION_1_3) {
 296             LOG.debug("Device version not support ROLE");
 297             return Futures.immediateFuture(null);
 298         } else {
 299             final SetRoleInput setRoleInput = (new SetRoleInputBuilder()).setControllerRole(newRole)
 300                     .setNode(new NodeRef(DeviceStateUtil.createNodeInstanceIdentifier(roleContext.getDeviceInfo().getNodeId()))).build();
 301             setRoleOutputFuture = roleContext.getSalRoleService().setRole(setRoleInput);
 302             final TimerTask timerTask = timeout -> {
 303                 if (!setRoleOutputFuture.isDone()) {
 304                     LOG.warn("New role {} was not propagated to device {} during 10 sec", newRole, roleContext.getDeviceInfo().getNodeId());
 305                     setRoleOutputFuture.cancel(true);
 306                 }
 307             };
 308             conductor.newTimeout(timerTask, 10, TimeUnit.SECONDS);
 309         }
 310         return JdkFutureAdapters.listenInPoolThread(setRoleOutputFuture);
 311     }
 312
 313     @VisibleForTesting
 314     CheckedFuture<Void, TransactionCommitFailedException> removeDeviceFromOperationalDS(final DeviceInfo deviceInfo, final int numRetries) {
 315         final WriteTransaction delWtx = dataBroker.newWriteOnlyTransaction();
 316         delWtx.delete(LogicalDatastoreType.OPERATIONAL, DeviceStateUtil.createNodeInstanceIdentifier(deviceInfo.getNodeId()));
 317         final CheckedFuture<Void, TransactionCommitFailedException> delFuture = delWtx.submit();
 318
 319         Futures.addCallback(delFuture, new FutureCallback<Void>() {
 320             @Override
 321             public void onSuccess(final Void result) {
 322                 LOG.debug("Delete Node {} was successful", deviceInfo);
 323                 final RoleContext roleContext = contexts.remove(deviceInfo);
 324                 if (roleContext != null) {
 325                     roleContext.close();
 326                 }
 327             }
 328
 329             @Override
 330             public void onFailure(@Nonnull final Throwable t) {
 331                 // If we have any retries left, we will try to clean the datastore again
 332                 if (numRetries > 0) {
 333                     // We "used" one retry here, so decrement it
 334                     final int curRetries = numRetries - 1;
 335                     LOG.debug("Delete node {} failed with exception {}. Trying again (retries left: {})", deviceInfo.getNodeId(), t, curRetries);
 336                     // Recursive call to this method with "one less" retry
 337                     removeDeviceFromOperationalDS(deviceInfo, curRetries);
 338                     return;
 339                 }
 340
 341                 // No retries left, so we will just close the role context, and ignore datastore cleanup
 342                 LOG.warn("Delete node {} failed with exception {}. No retries left, aborting", deviceInfo.getNodeId(), t);
 343                 final RoleContext roleContext = contexts.remove(deviceInfo);
 344                 if (roleContext != null) {
 345                     roleContext.close();
 346                 }
 347             }
 348         });
 349
 350         return delFuture;
 351     }
 352
 353     @Override
 354     public void setDeviceTerminationPhaseHandler(final DeviceTerminationPhaseHandler handler) {
 355         deviceTerminationPhaseHandler = handler;
 356     }
 357
 358     @Override
 359     public void servicesChangeDone(final DeviceInfo deviceInfo, final boolean success) {
 360         LOG.debug("Services stopping done for node {} as " + (success ? "successful" : "unsuccessful"), deviceInfo);
 361         final RoleContext roleContext = contexts.get(deviceInfo);
 362         if (null != roleContext) {
 363             /* Services stopped or failure */
 364             roleContext.unregisterCandidate(roleContext.getTxEntity());
 365         }
 366     }
 367
 368     @VisibleForTesting
 369     RoleContext getRoleContext(final DeviceInfo deviceInfo){
 370         return contexts.get(deviceInfo);
 371     }
 372
 373     /**
 374      * This method is only for testing
 375      */
 376     @VisibleForTesting
 377     void setRoleContext(DeviceInfo deviceInfo, RoleContext roleContext){
 378         if(!contexts.containsKey(deviceInfo)) {
 379             contexts.put(deviceInfo, roleContext);
 380         }
 381     }
 382
 383     @Override
 384     public void addRoleChangeListener(final RoleChangeListener roleChangeListener) {
 385         this.listeners.add(roleChangeListener);
 386     }
 387
 388     /**
 389      * Invoked when initialization phase is done
 390      * @param deviceInfo node identification
 391      * @param success true if initialization done ok, false otherwise
 392      */
 393     @VisibleForTesting
 394     void notifyListenersRoleInitializationDone(final DeviceInfo deviceInfo, final boolean success){
 395         LOG.debug("Notifying registered listeners for role initialization done, no. of listeners {}", listeners.size());
 396         for (final RoleChangeListener listener : listeners) {
 397             listener.roleInitializationDone(deviceInfo, success);
 398         }
 399     }
 400
 401     /**
 402      * Notifies registered listener on role change. Role is the new role on device
 403      * If initialization phase is true, we may skip service starting
 404      * @param deviceInfo
 405      * @param role new role meant to be set on device
 406      */
 407     @VisibleForTesting
 408     void notifyListenersRoleChangeOnDevice(final DeviceInfo deviceInfo, final OfpRole role){
 409         LOG.debug("Notifying registered listeners for role change, no. of listeners {}", listeners.size());
 410         for (final RoleChangeListener listener : listeners) {
 411             listener.roleChangeOnDevice(deviceInfo, role);
 412         }
 413     }
 414
 415     @Override
 416     public <T extends OFPContext> T gainContext(DeviceInfo deviceInfo) {
 417         return (T) contexts.get(deviceInfo);
 418     }
 419 }