| /* |
| * 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.cluster.impl; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Maps; |
| |
| 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.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.joda.time.DateTime; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.util.KryoNamespace; |
| import org.onosproject.cluster.ClusterEvent; |
| import org.onosproject.cluster.ClusterMetadataService; |
| import org.onosproject.cluster.ClusterStore; |
| import org.onosproject.cluster.ClusterStoreDelegate; |
| import org.onosproject.cluster.ControllerNode; |
| import org.onosproject.cluster.ControllerNode.State; |
| import org.onosproject.cluster.DefaultControllerNode; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.store.AbstractStore; |
| import org.onosproject.store.cluster.messaging.Endpoint; |
| import org.onosproject.store.cluster.messaging.MessagingService; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.serializers.KryoSerializer; |
| import org.slf4j.Logger; |
| |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.BiConsumer; |
| import java.util.stream.Collectors; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| @Component(immediate = true) |
| @Service |
| /** |
| * Distributed cluster nodes store that employs an accrual failure |
| * detector to identify cluster member up/down status. |
| */ |
| public class DistributedClusterStore |
| extends AbstractStore<ClusterEvent, ClusterStoreDelegate> |
| implements ClusterStore { |
| |
| private static final Logger log = getLogger(DistributedClusterStore.class); |
| |
| public static final String HEARTBEAT_MESSAGE = "onos-cluster-heartbeat"; |
| |
| // TODO: make these configurable. |
| private static final int HEARTBEAT_INTERVAL_MS = 100; |
| private static final int PHI_FAILURE_THRESHOLD = 10; |
| |
| private static final KryoSerializer SERIALIZER = new KryoSerializer() { |
| @Override |
| protected void setupKryoPool() { |
| serializerPool = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(HeartbeatMessage.class) |
| .build() |
| .populate(1); |
| } |
| }; |
| |
| private static final String INSTANCE_ID_NULL = "Instance ID cannot be null"; |
| |
| private final Map<NodeId, ControllerNode> allNodes = Maps.newConcurrentMap(); |
| private final Map<NodeId, State> nodeStates = Maps.newConcurrentMap(); |
| private final Map<NodeId, DateTime> nodeStateLastUpdatedTimes = Maps.newConcurrentMap(); |
| private ScheduledExecutorService heartBeatSender = Executors.newSingleThreadScheduledExecutor( |
| groupedThreads("onos/cluster/membership", "heartbeat-sender")); |
| private ExecutorService heartBeatMessageHandler = Executors.newSingleThreadExecutor( |
| groupedThreads("onos/cluster/membership", "heartbeat-receiver")); |
| |
| private PhiAccrualFailureDetector failureDetector; |
| |
| private ControllerNode localNode; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterMetadataService clusterMetadataService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MessagingService messagingService; |
| |
| @Activate |
| public void activate() { |
| localNode = clusterMetadataService.getLocalNode(); |
| |
| messagingService.registerHandler(HEARTBEAT_MESSAGE, |
| new HeartbeatMessageHandler(), heartBeatMessageHandler); |
| |
| failureDetector = new PhiAccrualFailureDetector(); |
| |
| heartBeatSender.scheduleWithFixedDelay(this::heartbeat, 0, |
| HEARTBEAT_INTERVAL_MS, TimeUnit.MILLISECONDS); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| messagingService.unregisterHandler(HEARTBEAT_MESSAGE); |
| heartBeatSender.shutdownNow(); |
| heartBeatMessageHandler.shutdownNow(); |
| |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public void setDelegate(ClusterStoreDelegate delegate) { |
| checkNotNull(delegate, "Delegate cannot be null"); |
| this.delegate = delegate; |
| } |
| |
| @Override |
| public void unsetDelegate(ClusterStoreDelegate delegate) { |
| this.delegate = null; |
| } |
| |
| @Override |
| public boolean hasDelegate() { |
| return this.delegate != null; |
| } |
| |
| @Override |
| public ControllerNode getLocalNode() { |
| return localNode; |
| } |
| |
| @Override |
| public Set<ControllerNode> getNodes() { |
| return ImmutableSet.copyOf(allNodes.values()); |
| } |
| |
| @Override |
| public ControllerNode getNode(NodeId nodeId) { |
| checkNotNull(nodeId, INSTANCE_ID_NULL); |
| return allNodes.get(nodeId); |
| } |
| |
| @Override |
| public State getState(NodeId nodeId) { |
| checkNotNull(nodeId, INSTANCE_ID_NULL); |
| return MoreObjects.firstNonNull(nodeStates.get(nodeId), State.INACTIVE); |
| } |
| |
| @Override |
| public ControllerNode addNode(NodeId nodeId, IpAddress ip, int tcpPort) { |
| ControllerNode node = new DefaultControllerNode(nodeId, ip, tcpPort); |
| addNode(node); |
| return node; |
| } |
| |
| @Override |
| public void removeNode(NodeId nodeId) { |
| checkNotNull(nodeId, INSTANCE_ID_NULL); |
| ControllerNode node = allNodes.remove(nodeId); |
| if (node != null) { |
| nodeStates.remove(nodeId); |
| notifyDelegate(new ClusterEvent(ClusterEvent.Type.INSTANCE_REMOVED, node)); |
| } |
| } |
| |
| private void addNode(ControllerNode node) { |
| allNodes.put(node.id(), node); |
| updateState(node.id(), node.equals(localNode) ? State.ACTIVE : State.INACTIVE); |
| notifyDelegate(new ClusterEvent(ClusterEvent.Type.INSTANCE_ADDED, node)); |
| } |
| |
| private void updateState(NodeId nodeId, State newState) { |
| nodeStates.put(nodeId, newState); |
| nodeStateLastUpdatedTimes.put(nodeId, DateTime.now()); |
| } |
| |
| private void heartbeat() { |
| try { |
| Set<ControllerNode> peers = allNodes.values() |
| .stream() |
| .filter(node -> !(node.id().equals(localNode.id()))) |
| .collect(Collectors.toSet()); |
| byte[] hbMessagePayload = SERIALIZER.encode(new HeartbeatMessage(localNode, peers)); |
| peers.forEach((node) -> { |
| heartbeatToPeer(hbMessagePayload, node); |
| State currentState = nodeStates.get(node.id()); |
| double phi = failureDetector.phi(node.id()); |
| if (phi >= PHI_FAILURE_THRESHOLD) { |
| if (currentState == State.ACTIVE) { |
| updateState(node.id(), State.INACTIVE); |
| notifyStateChange(node.id(), State.ACTIVE, State.INACTIVE); |
| } |
| } else { |
| if (currentState == State.INACTIVE) { |
| updateState(node.id(), State.ACTIVE); |
| notifyStateChange(node.id(), State.INACTIVE, State.ACTIVE); |
| } |
| } |
| }); |
| } catch (Exception e) { |
| log.debug("Failed to send heartbeat", e); |
| } |
| } |
| |
| private void notifyStateChange(NodeId nodeId, State oldState, State newState) { |
| ControllerNode node = allNodes.get(nodeId); |
| if (newState == State.ACTIVE) { |
| notifyDelegate(new ClusterEvent(ClusterEvent.Type.INSTANCE_ACTIVATED, node)); |
| } else { |
| notifyDelegate(new ClusterEvent(ClusterEvent.Type.INSTANCE_DEACTIVATED, node)); |
| } |
| } |
| |
| private void heartbeatToPeer(byte[] messagePayload, ControllerNode peer) { |
| Endpoint remoteEp = new Endpoint(peer.ip(), peer.tcpPort()); |
| messagingService.sendAsync(remoteEp, HEARTBEAT_MESSAGE, messagePayload).whenComplete((result, error) -> { |
| if (error != null) { |
| log.trace("Sending heartbeat to {} failed", remoteEp, error); |
| } |
| }); |
| } |
| |
| private class HeartbeatMessageHandler implements BiConsumer<Endpoint, byte[]> { |
| @Override |
| public void accept(Endpoint sender, byte[] message) { |
| HeartbeatMessage hb = SERIALIZER.decode(message); |
| failureDetector.report(hb.source().id()); |
| hb.knownPeers().forEach(node -> { |
| allNodes.put(node.id(), node); |
| }); |
| } |
| } |
| |
| private static class HeartbeatMessage { |
| private ControllerNode source; |
| private Set<ControllerNode> knownPeers; |
| |
| public HeartbeatMessage(ControllerNode source, Set<ControllerNode> members) { |
| this.source = source; |
| this.knownPeers = ImmutableSet.copyOf(members); |
| } |
| |
| public ControllerNode source() { |
| return source; |
| } |
| |
| public Set<ControllerNode> knownPeers() { |
| return knownPeers; |
| } |
| } |
| |
| @Override |
| public DateTime getLastUpdated(NodeId nodeId) { |
| return nodeStateLastUpdatedTimes.get(nodeId); |
| } |
| |
| } |