| /* |
| * Copyright 2014-2015 Open Networking Laboratory |
| * |
| * 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. |
| */ |
| package org.onosproject.store.flow.impl; |
| |
| import com.google.common.base.Objects; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Sets; |
| import com.google.common.util.concurrent.Futures; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Modified; |
| import org.apache.felix.scr.annotations.Property; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onlab.util.KryoNamespace; |
| import org.onlab.util.NewConcurrentHashMap; |
| import org.onlab.util.Tools; |
| import org.onosproject.cfg.ComponentConfigService; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.core.IdGenerator; |
| import org.onosproject.mastership.MastershipService; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.flow.CompletedBatchOperation; |
| import org.onosproject.net.flow.DefaultFlowEntry; |
| import org.onosproject.net.flow.FlowEntry; |
| import org.onosproject.net.flow.FlowEntry.FlowEntryState; |
| import org.onosproject.net.flow.FlowId; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.net.flow.FlowRuleBatchEntry; |
| import org.onosproject.net.flow.FlowRuleBatchEntry.FlowRuleOperation; |
| import org.onosproject.net.flow.FlowRuleBatchEvent; |
| import org.onosproject.net.flow.FlowRuleBatchOperation; |
| import org.onosproject.net.flow.FlowRuleBatchRequest; |
| import org.onosproject.net.flow.FlowRuleEvent; |
| import org.onosproject.net.flow.FlowRuleEvent.Type; |
| import org.onosproject.net.flow.FlowRuleService; |
| import org.onosproject.net.flow.FlowRuleStore; |
| import org.onosproject.net.flow.FlowRuleStoreDelegate; |
| import org.onosproject.net.flow.StoredFlowEntry; |
| import org.onosproject.store.AbstractStore; |
| import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
| import org.onosproject.store.cluster.messaging.ClusterMessage; |
| import org.onosproject.store.cluster.messaging.ClusterMessageHandler; |
| import org.onosproject.store.flow.ReplicaInfoEvent; |
| import org.onosproject.store.flow.ReplicaInfoEventListener; |
| import org.onosproject.store.flow.ReplicaInfoService; |
| import org.onosproject.store.serializers.KryoSerializer; |
| import org.onosproject.store.serializers.StoreSerializer; |
| import org.onosproject.store.serializers.custom.DistributedStoreSerializers; |
| import org.osgi.service.component.ComponentContext; |
| import org.slf4j.Logger; |
| |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.stream.Collectors; |
| |
| import static org.apache.commons.lang3.concurrent.ConcurrentUtils.createIfAbsentUnchecked; |
| import static com.google.common.base.Strings.isNullOrEmpty; |
| import static org.onlab.util.Tools.get; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.net.flow.FlowRuleEvent.Type.RULE_REMOVED; |
| import static org.onosproject.store.flow.impl.FlowStoreMessageSubjects.*; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Manages inventory of flow rules using a distributed state management protocol. |
| */ |
| @Component(immediate = true, enabled = true) |
| @Service |
| public class NewDistributedFlowRuleStore |
| extends AbstractStore<FlowRuleBatchEvent, FlowRuleStoreDelegate> |
| implements FlowRuleStore { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private static final int MESSAGE_HANDLER_THREAD_POOL_SIZE = 8; |
| private static final boolean DEFAULT_BACKUP_ENABLED = true; |
| private static final int DEFAULT_BACKUP_PERIOD_MILLIS = 2000; |
| private static final long FLOW_RULE_STORE_TIMEOUT_MILLIS = 5000; |
| |
| @Property(name = "msgHandlerPoolSize", intValue = MESSAGE_HANDLER_THREAD_POOL_SIZE, |
| label = "Number of threads in the message handler pool") |
| private int msgHandlerPoolSize = MESSAGE_HANDLER_THREAD_POOL_SIZE; |
| |
| @Property(name = "backupEnabled", boolValue = DEFAULT_BACKUP_ENABLED, |
| label = "Indicates whether backups are enabled or not") |
| private boolean backupEnabled = DEFAULT_BACKUP_ENABLED; |
| |
| @Property(name = "backupPeriod", intValue = DEFAULT_BACKUP_PERIOD_MILLIS, |
| label = "Delay in ms between successive backup runs") |
| private int backupPeriod = DEFAULT_BACKUP_PERIOD_MILLIS; |
| |
| private InternalFlowTable flowTable = new InternalFlowTable(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ReplicaInfoService replicaInfoManager; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterCommunicationService clusterCommunicator; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ComponentConfigService configService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MastershipService mastershipService; |
| |
| private Map<Long, NodeId> pendingResponses = Maps.newConcurrentMap(); |
| private ExecutorService messageHandlingExecutor; |
| |
| private ScheduledFuture<?> backupTask; |
| private final ScheduledExecutorService backupSenderExecutor = |
| Executors.newSingleThreadScheduledExecutor(groupedThreads("onos/flow", "backup-sender")); |
| |
| protected static final StoreSerializer SERIALIZER = new KryoSerializer() { |
| @Override |
| protected void setupKryoPool() { |
| serializerPool = KryoNamespace.newBuilder() |
| .register(DistributedStoreSerializers.STORE_COMMON) |
| .nextId(DistributedStoreSerializers.STORE_CUSTOM_BEGIN) |
| .register(FlowRuleEvent.class) |
| .register(FlowRuleEvent.Type.class) |
| .build(); |
| } |
| }; |
| |
| private IdGenerator idGenerator; |
| private NodeId local; |
| |
| @Activate |
| public void activate(ComponentContext context) { |
| configService.registerProperties(getClass()); |
| |
| idGenerator = coreService.getIdGenerator(FlowRuleService.FLOW_OP_TOPIC); |
| |
| local = clusterService.getLocalNode().id(); |
| |
| messageHandlingExecutor = Executors.newFixedThreadPool( |
| msgHandlerPoolSize, groupedThreads("onos/store/flow", "message-handlers")); |
| |
| registerMessageHandlers(messageHandlingExecutor); |
| |
| if (backupEnabled) { |
| replicaInfoManager.addListener(flowTable); |
| backupTask = backupSenderExecutor.scheduleWithFixedDelay( |
| flowTable::backup, |
| 0, |
| backupPeriod, |
| TimeUnit.MILLISECONDS); |
| } |
| |
| logConfig("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate(ComponentContext context) { |
| if (backupEnabled) { |
| replicaInfoManager.removeListener(flowTable); |
| backupTask.cancel(true); |
| } |
| configService.unregisterProperties(getClass(), false); |
| unregisterMessageHandlers(); |
| messageHandlingExecutor.shutdownNow(); |
| backupSenderExecutor.shutdownNow(); |
| log.info("Stopped"); |
| } |
| |
| @SuppressWarnings("rawtypes") |
| @Modified |
| public void modified(ComponentContext context) { |
| if (context == null) { |
| backupEnabled = DEFAULT_BACKUP_ENABLED; |
| logConfig("Default config"); |
| return; |
| } |
| |
| Dictionary properties = context.getProperties(); |
| int newPoolSize; |
| boolean newBackupEnabled; |
| int newBackupPeriod; |
| try { |
| String s = get(properties, "msgHandlerPoolSize"); |
| newPoolSize = isNullOrEmpty(s) ? msgHandlerPoolSize : Integer.parseInt(s.trim()); |
| |
| s = get(properties, "backupEnabled"); |
| newBackupEnabled = isNullOrEmpty(s) ? backupEnabled : Boolean.parseBoolean(s.trim()); |
| |
| s = get(properties, "backupPeriod"); |
| newBackupPeriod = isNullOrEmpty(s) ? backupPeriod : Integer.parseInt(s.trim()); |
| |
| } catch (NumberFormatException | ClassCastException e) { |
| newPoolSize = MESSAGE_HANDLER_THREAD_POOL_SIZE; |
| newBackupEnabled = DEFAULT_BACKUP_ENABLED; |
| newBackupPeriod = DEFAULT_BACKUP_PERIOD_MILLIS; |
| } |
| |
| boolean restartBackupTask = false; |
| if (newBackupEnabled != backupEnabled) { |
| backupEnabled = newBackupEnabled; |
| if (!backupEnabled) { |
| replicaInfoManager.removeListener(flowTable); |
| if (backupTask != null) { |
| backupTask.cancel(false); |
| backupTask = null; |
| } |
| } else { |
| replicaInfoManager.addListener(flowTable); |
| } |
| restartBackupTask = backupEnabled; |
| } |
| if (newBackupPeriod != backupPeriod) { |
| backupPeriod = newBackupPeriod; |
| restartBackupTask = backupEnabled; |
| } |
| if (restartBackupTask) { |
| if (backupTask != null) { |
| // cancel previously running task |
| backupTask.cancel(false); |
| } |
| backupTask = backupSenderExecutor.scheduleWithFixedDelay( |
| flowTable::backup, |
| 0, |
| backupPeriod, |
| TimeUnit.MILLISECONDS); |
| } |
| if (newPoolSize != msgHandlerPoolSize) { |
| msgHandlerPoolSize = newPoolSize; |
| ExecutorService oldMsgHandler = messageHandlingExecutor; |
| messageHandlingExecutor = Executors.newFixedThreadPool( |
| msgHandlerPoolSize, groupedThreads("onos/store/flow", "message-handlers")); |
| |
| // replace previously registered handlers. |
| registerMessageHandlers(messageHandlingExecutor); |
| oldMsgHandler.shutdown(); |
| } |
| logConfig("Reconfigured"); |
| } |
| |
| private void registerMessageHandlers(ExecutorService executor) { |
| |
| clusterCommunicator.addSubscriber(APPLY_BATCH_FLOWS, new OnStoreBatch(), executor); |
| clusterCommunicator.<FlowRuleBatchEvent>addSubscriber( |
| REMOTE_APPLY_COMPLETED, SERIALIZER::decode, this::notifyDelegate, executor); |
| clusterCommunicator.addSubscriber( |
| GET_FLOW_ENTRY, SERIALIZER::decode, flowTable::getFlowEntry, SERIALIZER::encode, executor); |
| clusterCommunicator.addSubscriber( |
| GET_DEVICE_FLOW_ENTRIES, SERIALIZER::decode, flowTable::getFlowEntries, SERIALIZER::encode, executor); |
| clusterCommunicator.addSubscriber( |
| REMOVE_FLOW_ENTRY, SERIALIZER::decode, this::removeFlowRuleInternal, SERIALIZER::encode, executor); |
| clusterCommunicator.addSubscriber( |
| REMOVE_FLOW_ENTRY, SERIALIZER::decode, this::removeFlowRuleInternal, SERIALIZER::encode, executor); |
| clusterCommunicator.addSubscriber( |
| FLOW_TABLE_BACKUP, SERIALIZER::decode, flowTable::onBackupReceipt, SERIALIZER::encode, executor); |
| } |
| |
| private void unregisterMessageHandlers() { |
| clusterCommunicator.removeSubscriber(REMOVE_FLOW_ENTRY); |
| clusterCommunicator.removeSubscriber(GET_DEVICE_FLOW_ENTRIES); |
| clusterCommunicator.removeSubscriber(GET_FLOW_ENTRY); |
| clusterCommunicator.removeSubscriber(APPLY_BATCH_FLOWS); |
| clusterCommunicator.removeSubscriber(REMOTE_APPLY_COMPLETED); |
| clusterCommunicator.removeSubscriber(FLOW_TABLE_BACKUP); |
| } |
| |
| private void logConfig(String prefix) { |
| log.info("{} with msgHandlerPoolSize = {}; backupEnabled = {}, backupPeriod = {}", |
| prefix, msgHandlerPoolSize, backupEnabled, backupPeriod); |
| } |
| |
| // This is not a efficient operation on a distributed sharded |
| // flow store. We need to revisit the need for this operation or at least |
| // make it device specific. |
| @Override |
| public int getFlowRuleCount() { |
| AtomicInteger sum = new AtomicInteger(0); |
| deviceService.getDevices().forEach(device -> sum.addAndGet(Iterables.size(getFlowEntries(device.id())))); |
| return sum.get(); |
| } |
| |
| @Override |
| public FlowEntry getFlowEntry(FlowRule rule) { |
| NodeId master = mastershipService.getMasterFor(rule.deviceId()); |
| |
| if (master == null) { |
| log.warn("Failed to getFlowEntry: No master for {}", rule.deviceId()); |
| return null; |
| } |
| |
| if (Objects.equal(local, master)) { |
| return flowTable.getFlowEntry(rule); |
| } |
| |
| log.trace("Forwarding getFlowEntry to {}, which is the primary (master) for device {}", |
| master, rule.deviceId()); |
| |
| return Tools.futureGetOrElse(clusterCommunicator.sendAndReceive(rule, |
| FlowStoreMessageSubjects.GET_FLOW_ENTRY, |
| SERIALIZER::encode, |
| SERIALIZER::decode, |
| master), |
| FLOW_RULE_STORE_TIMEOUT_MILLIS, |
| TimeUnit.MILLISECONDS, |
| null); |
| } |
| |
| @Override |
| public Iterable<FlowEntry> getFlowEntries(DeviceId deviceId) { |
| NodeId master = mastershipService.getMasterFor(deviceId); |
| |
| if (master == null) { |
| log.warn("Failed to getFlowEntries: No master for {}", deviceId); |
| return Collections.emptyList(); |
| } |
| |
| if (Objects.equal(local, master)) { |
| return flowTable.getFlowEntries(deviceId); |
| } |
| |
| log.trace("Forwarding getFlowEntries to {}, which is the primary (master) for device {}", |
| master, deviceId); |
| |
| return Tools.futureGetOrElse(clusterCommunicator.sendAndReceive(deviceId, |
| FlowStoreMessageSubjects.GET_DEVICE_FLOW_ENTRIES, |
| SERIALIZER::encode, |
| SERIALIZER::decode, |
| master), |
| FLOW_RULE_STORE_TIMEOUT_MILLIS, |
| TimeUnit.MILLISECONDS, |
| Collections.emptyList()); |
| } |
| |
| @Override |
| public void storeFlowRule(FlowRule rule) { |
| storeBatch(new FlowRuleBatchOperation( |
| Collections.singletonList(new FlowRuleBatchEntry(FlowRuleOperation.ADD, rule)), |
| rule.deviceId(), idGenerator.getNewId())); |
| } |
| |
| @Override |
| public void storeBatch(FlowRuleBatchOperation operation) { |
| if (operation.getOperations().isEmpty()) { |
| notifyDelegate(FlowRuleBatchEvent.completed( |
| new FlowRuleBatchRequest(operation.id(), Collections.emptySet()), |
| new CompletedBatchOperation(true, Collections.emptySet(), operation.deviceId()))); |
| return; |
| } |
| |
| DeviceId deviceId = operation.deviceId(); |
| NodeId master = mastershipService.getMasterFor(deviceId); |
| |
| if (master == null) { |
| log.warn("No master for {} : flows will be marked for removal", deviceId); |
| |
| updateStoreInternal(operation); |
| |
| notifyDelegate(FlowRuleBatchEvent.completed( |
| new FlowRuleBatchRequest(operation.id(), Collections.emptySet()), |
| new CompletedBatchOperation(true, Collections.emptySet(), operation.deviceId()))); |
| return; |
| } |
| |
| if (Objects.equal(local, master)) { |
| storeBatchInternal(operation); |
| return; |
| } |
| |
| log.trace("Forwarding storeBatch to {}, which is the primary (master) for device {}", |
| master, deviceId); |
| |
| clusterCommunicator.unicast(operation, |
| APPLY_BATCH_FLOWS, |
| SERIALIZER::encode, |
| master) |
| .whenComplete((result, error) -> { |
| log.warn("Failed to storeBatch: {} to {}", operation, master); |
| |
| Set<FlowRule> allFailures = operation.getOperations() |
| .stream() |
| .map(op -> op.target()) |
| .collect(Collectors.toSet()); |
| |
| notifyDelegate(FlowRuleBatchEvent.completed( |
| new FlowRuleBatchRequest(operation.id(), Collections.emptySet()), |
| new CompletedBatchOperation(false, allFailures, deviceId))); |
| }); |
| } |
| |
| private void storeBatchInternal(FlowRuleBatchOperation operation) { |
| |
| final DeviceId did = operation.deviceId(); |
| //final Collection<FlowEntry> ft = flowTable.getFlowEntries(did); |
| Set<FlowRuleBatchEntry> currentOps = updateStoreInternal(operation); |
| if (currentOps.isEmpty()) { |
| batchOperationComplete(FlowRuleBatchEvent.completed( |
| new FlowRuleBatchRequest(operation.id(), Collections.emptySet()), |
| new CompletedBatchOperation(true, Collections.emptySet(), did))); |
| return; |
| } |
| |
| notifyDelegate(FlowRuleBatchEvent.requested(new |
| FlowRuleBatchRequest(operation.id(), |
| currentOps), operation.deviceId())); |
| } |
| |
| private Set<FlowRuleBatchEntry> updateStoreInternal(FlowRuleBatchOperation operation) { |
| return operation.getOperations().stream().map( |
| op -> { |
| StoredFlowEntry entry; |
| switch (op.operator()) { |
| case ADD: |
| entry = new DefaultFlowEntry(op.target()); |
| // always add requested FlowRule |
| // Note: 2 equal FlowEntry may have different treatment |
| flowTable.remove(entry.deviceId(), entry); |
| flowTable.add(entry); |
| |
| return op; |
| case REMOVE: |
| entry = flowTable.getFlowEntry(op.target()); |
| if (entry != null) { |
| entry.setState(FlowEntryState.PENDING_REMOVE); |
| return op; |
| } |
| break; |
| case MODIFY: |
| //TODO: figure this out at some point |
| break; |
| default: |
| log.warn("Unknown flow operation operator: {}", op.operator()); |
| } |
| return null; |
| } |
| ).filter(op -> op != null).collect(Collectors.toSet()); |
| } |
| |
| @Override |
| public void deleteFlowRule(FlowRule rule) { |
| storeBatch( |
| new FlowRuleBatchOperation( |
| Collections.singletonList( |
| new FlowRuleBatchEntry( |
| FlowRuleOperation.REMOVE, |
| rule)), rule.deviceId(), idGenerator.getNewId())); |
| } |
| |
| @Override |
| public FlowRuleEvent addOrUpdateFlowRule(FlowEntry rule) { |
| NodeId master = mastershipService.getMasterFor(rule.deviceId()); |
| if (Objects.equal(local, master)) { |
| return addOrUpdateFlowRuleInternal(rule); |
| } |
| |
| log.warn("Tried to update FlowRule {} state," |
| + " while the Node was not the master.", rule); |
| return null; |
| } |
| |
| private FlowRuleEvent addOrUpdateFlowRuleInternal(FlowEntry rule) { |
| // check if this new rule is an update to an existing entry |
| StoredFlowEntry stored = flowTable.getFlowEntry(rule); |
| if (stored != null) { |
| stored.setBytes(rule.bytes()); |
| stored.setLife(rule.life()); |
| stored.setPackets(rule.packets()); |
| if (stored.state() == FlowEntryState.PENDING_ADD) { |
| stored.setState(FlowEntryState.ADDED); |
| return new FlowRuleEvent(Type.RULE_ADDED, rule); |
| } |
| return new FlowRuleEvent(Type.RULE_UPDATED, rule); |
| } |
| |
| // TODO: Confirm if this behavior is correct. See SimpleFlowRuleStore |
| // TODO: also update backup if the behavior is correct. |
| flowTable.add(rule); |
| return null; |
| } |
| |
| @Override |
| public FlowRuleEvent removeFlowRule(FlowEntry rule) { |
| final DeviceId deviceId = rule.deviceId(); |
| NodeId master = mastershipService.getMasterFor(deviceId); |
| |
| if (Objects.equal(local, master)) { |
| // bypass and handle it locally |
| return removeFlowRuleInternal(rule); |
| } |
| |
| if (master == null) { |
| log.warn("Failed to removeFlowRule: No master for {}", deviceId); |
| // TODO: revisit if this should be null (="no-op") or Exception |
| return null; |
| } |
| |
| log.trace("Forwarding removeFlowRule to {}, which is the master for device {}", |
| master, deviceId); |
| |
| return Futures.get(clusterCommunicator.sendAndReceive( |
| rule, |
| REMOVE_FLOW_ENTRY, |
| SERIALIZER::encode, |
| SERIALIZER::decode, |
| master), |
| FLOW_RULE_STORE_TIMEOUT_MILLIS, |
| TimeUnit.MILLISECONDS, |
| RuntimeException.class); |
| } |
| |
| private FlowRuleEvent removeFlowRuleInternal(FlowEntry rule) { |
| final DeviceId deviceId = rule.deviceId(); |
| // This is where one could mark a rule as removed and still keep it in the store. |
| final boolean removed = flowTable.remove(deviceId, rule); //flowEntries.remove(deviceId, rule); |
| return removed ? new FlowRuleEvent(RULE_REMOVED, rule) : null; |
| } |
| |
| @Override |
| public void batchOperationComplete(FlowRuleBatchEvent event) { |
| //FIXME: need a per device pending response |
| NodeId nodeId = pendingResponses.remove(event.subject().batchId()); |
| if (nodeId == null) { |
| notifyDelegate(event); |
| } else { |
| // TODO check unicast return value |
| clusterCommunicator.unicast(event, REMOTE_APPLY_COMPLETED, SERIALIZER::encode, nodeId); |
| //error log: log.warn("Failed to respond to peer for batch operation result"); |
| } |
| } |
| |
| private final class OnStoreBatch implements ClusterMessageHandler { |
| |
| @Override |
| public void handle(final ClusterMessage message) { |
| FlowRuleBatchOperation operation = SERIALIZER.decode(message.payload()); |
| log.debug("received batch request {}", operation); |
| |
| final DeviceId deviceId = operation.deviceId(); |
| NodeId master = mastershipService.getMasterFor(deviceId); |
| if (!Objects.equal(local, master)) { |
| Set<FlowRule> failures = new HashSet<>(operation.size()); |
| for (FlowRuleBatchEntry op : operation.getOperations()) { |
| failures.add(op.target()); |
| } |
| CompletedBatchOperation allFailed = new CompletedBatchOperation(false, failures, deviceId); |
| // This node is no longer the master, respond as all failed. |
| // TODO: we might want to wrap response in envelope |
| // to distinguish sw programming failure and hand over |
| // it make sense in the latter case to retry immediately. |
| message.respond(SERIALIZER.encode(allFailed)); |
| return; |
| } |
| |
| pendingResponses.put(operation.id(), message.sender()); |
| storeBatchInternal(operation); |
| } |
| } |
| |
| private class InternalFlowTable implements ReplicaInfoEventListener { |
| |
| private final ConcurrentMap<DeviceId, ConcurrentMap<FlowId, Set<StoredFlowEntry>>> |
| flowEntries = new ConcurrentHashMap<>(); |
| |
| private final Map<DeviceId, Long> lastBackupTimes = Maps.newConcurrentMap(); |
| private final Map<DeviceId, Long> lastUpdateTimes = Maps.newConcurrentMap(); |
| private final Map<DeviceId, NodeId> lastBackupNodes = Maps.newConcurrentMap(); |
| |
| private NewConcurrentHashMap<FlowId, Set<StoredFlowEntry>> lazyEmptyFlowTable() { |
| return NewConcurrentHashMap.<FlowId, Set<StoredFlowEntry>>ifNeeded(); |
| } |
| |
| @Override |
| public void event(ReplicaInfoEvent event) { |
| if (event.type() == ReplicaInfoEvent.Type.BACKUPS_CHANGED) { |
| DeviceId deviceId = event.subject(); |
| NodeId master = mastershipService.getMasterFor(deviceId); |
| if (!Objects.equal(local, master)) { |
| // ignore since this event is for a device this node does not manage. |
| return; |
| } |
| NodeId newBackupNode = getBackupNode(deviceId); |
| NodeId currentBackupNode = lastBackupNodes.get(deviceId); |
| if (Objects.equal(newBackupNode, currentBackupNode)) { |
| // ignore since backup location hasn't changed. |
| return; |
| } |
| if (currentBackupNode != null && newBackupNode == null) { |
| // Current backup node is most likely down and no alternate backup node |
| // has been chosen. Clear current backup location so that we can resume |
| // backups when either current backup comes online or a different backup node |
| // is chosen. |
| log.warn("Lost backup location {} for deviceId {} and no alternate backup node exists. " |
| + "Flows can be lost if the master goes down", currentBackupNode, deviceId); |
| lastBackupNodes.remove(deviceId); |
| lastBackupTimes.remove(deviceId); |
| return; |
| // TODO: Pick any available node as backup and ensure hand-off occurs when |
| // a new master is elected. |
| } |
| log.info("Backup location for {} has changed from {} to {}.", |
| deviceId, currentBackupNode, newBackupNode); |
| backupSenderExecutor.schedule(() -> backupFlowEntries(newBackupNode, Sets.newHashSet(deviceId)), |
| 0, |
| TimeUnit.SECONDS); |
| } |
| } |
| |
| private void backupFlowEntries(NodeId nodeId, Set<DeviceId> deviceIds) { |
| log.debug("Sending flowEntries for devices {} to {} as backup.", deviceIds, nodeId); |
| Map<DeviceId, Map<FlowId, Set<StoredFlowEntry>>> deviceFlowEntries = |
| Maps.newConcurrentMap(); |
| flowEntries.forEach((key, value) -> { |
| if (deviceIds.contains(key)) { |
| deviceFlowEntries.put(key, value); |
| } |
| }); |
| clusterCommunicator.<Map<DeviceId, Map<FlowId, Set<StoredFlowEntry>>>, Set<DeviceId>>sendAndReceive( |
| deviceFlowEntries, |
| FLOW_TABLE_BACKUP, |
| SERIALIZER::encode, |
| SERIALIZER::decode, |
| nodeId) |
| .whenComplete((backedupDevices, error) -> { |
| Set<DeviceId> devicesNotBackedup = error != null ? |
| deviceFlowEntries.keySet() : |
| Sets.difference(deviceFlowEntries.keySet(), backedupDevices); |
| if (devicesNotBackedup.size() > 0) { |
| log.warn("Failed to backup devices: {}", devicesNotBackedup, error); |
| } |
| if (backedupDevices != null) { |
| backedupDevices.forEach(id -> { |
| lastBackupTimes.put(id, System.currentTimeMillis()); |
| lastBackupNodes.put(id, nodeId); |
| }); |
| } |
| }); |
| } |
| |
| /** |
| * Returns the flow table for specified device. |
| * |
| * @param deviceId identifier of the device |
| * @return Map representing Flow Table of given device. |
| */ |
| private ConcurrentMap<FlowId, Set<StoredFlowEntry>> getFlowTable(DeviceId deviceId) { |
| return createIfAbsentUnchecked(flowEntries, deviceId, lazyEmptyFlowTable()); |
| } |
| |
| private Set<StoredFlowEntry> getFlowEntriesInternal(DeviceId deviceId, FlowId flowId) { |
| return getFlowTable(deviceId).computeIfAbsent(flowId, id -> Sets.newCopyOnWriteArraySet()); |
| } |
| |
| private StoredFlowEntry getFlowEntryInternal(FlowRule rule) { |
| Set<StoredFlowEntry> flowEntries = getFlowEntriesInternal(rule.deviceId(), rule.id()); |
| return flowEntries.stream() |
| .filter(entry -> Objects.equal(entry, rule)) |
| .findAny() |
| .orElse(null); |
| } |
| |
| private Set<FlowEntry> getFlowEntriesInternal(DeviceId deviceId) { |
| Set<FlowEntry> result = Sets.newHashSet(); |
| getFlowTable(deviceId).values().forEach(result::addAll); |
| return result; |
| } |
| |
| public StoredFlowEntry getFlowEntry(FlowRule rule) { |
| return getFlowEntryInternal(rule); |
| } |
| |
| public Set<FlowEntry> getFlowEntries(DeviceId deviceId) { |
| return getFlowEntriesInternal(deviceId); |
| } |
| |
| public void add(FlowEntry rule) { |
| getFlowEntriesInternal(rule.deviceId(), rule.id()).add((StoredFlowEntry) rule); |
| lastUpdateTimes.put(rule.deviceId(), System.currentTimeMillis()); |
| } |
| |
| public boolean remove(DeviceId deviceId, FlowEntry rule) { |
| try { |
| return getFlowEntriesInternal(deviceId, rule.id()).remove(rule); |
| } finally { |
| lastUpdateTimes.put(deviceId, System.currentTimeMillis()); |
| } |
| } |
| |
| private NodeId getBackupNode(DeviceId deviceId) { |
| List<NodeId> deviceStandbys = replicaInfoManager.getReplicaInfoFor(deviceId).backups(); |
| // pick the standby which is most likely to become next master |
| return deviceStandbys.isEmpty() ? null : deviceStandbys.get(0); |
| } |
| |
| private void backup() { |
| if (!backupEnabled) { |
| return; |
| } |
| try { |
| // determine the set of devices that we need to backup during this run. |
| Set<DeviceId> devicesToBackup = mastershipService.getDevicesOf(local) |
| .stream() |
| .filter(deviceId -> { |
| Long lastBackupTime = lastBackupTimes.get(deviceId); |
| Long lastUpdateTime = lastUpdateTimes.get(deviceId); |
| NodeId lastBackupNode = lastBackupNodes.get(deviceId); |
| NodeId newBackupNode = getBackupNode(deviceId); |
| return lastBackupTime == null |
| || !Objects.equal(lastBackupNode, newBackupNode) |
| || (lastUpdateTime != null && lastUpdateTime > lastBackupTime); |
| }) |
| .collect(Collectors.toSet()); |
| |
| // compute a mapping from node to the set of devices whose flow entries it should backup |
| Map<NodeId, Set<DeviceId>> devicesToBackupByNode = Maps.newHashMap(); |
| devicesToBackup.forEach(deviceId -> { |
| NodeId backupLocation = getBackupNode(deviceId); |
| if (backupLocation != null) { |
| devicesToBackupByNode.computeIfAbsent(backupLocation, nodeId -> Sets.newHashSet()) |
| .add(deviceId); |
| } |
| }); |
| // send the device flow entries to their respective backup nodes |
| devicesToBackupByNode.forEach(this::backupFlowEntries); |
| } catch (Exception e) { |
| log.error("Backup failed.", e); |
| } |
| } |
| |
| private Set<DeviceId> onBackupReceipt(Map<DeviceId, Map<FlowId, Set<StoredFlowEntry>>> flowTables) { |
| log.debug("Received flowEntries for {} to backup", flowTables.keySet()); |
| Set<DeviceId> backedupDevices = Sets.newHashSet(); |
| try { |
| Set<DeviceId> managedDevices = mastershipService.getDevicesOf(local); |
| // Only process those devices are that not managed by the local node. |
| Maps.filterKeys(flowTables, deviceId -> !managedDevices.contains(deviceId)) |
| .forEach((deviceId, flowTable) -> { |
| Map<FlowId, Set<StoredFlowEntry>> deviceFlowTable = getFlowTable(deviceId); |
| deviceFlowTable.clear(); |
| deviceFlowTable.putAll(flowTable); |
| backedupDevices.add(deviceId); |
| }); |
| } catch (Exception e) { |
| log.warn("Failure processing backup request", e); |
| } |
| return backedupDevices; |
| } |
| } |
| } |