import akka.actor.Cancellable;
import com.google.common.base.Preconditions;
import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
import java.util.Queue;
import java.util.UUID;
import javax.annotation.Nullable;
+import org.opendaylight.controller.cluster.raft.RaftActorLeadershipTransferCohort.OnComplete;
+import org.opendaylight.controller.cluster.raft.ServerConfigurationPayload.ServerInfo;
import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
import org.opendaylight.controller.cluster.raft.base.messages.SnapshotComplete;
import org.opendaylight.controller.cluster.raft.behaviors.AbstractLeader;
import org.opendaylight.controller.cluster.raft.messages.AddServer;
import org.opendaylight.controller.cluster.raft.messages.AddServerReply;
+import org.opendaylight.controller.cluster.raft.messages.ChangeServersVotingStatus;
import org.opendaylight.controller.cluster.raft.messages.RemoveServer;
import org.opendaylight.controller.cluster.raft.messages.RemoveServerReply;
+import org.opendaylight.controller.cluster.raft.messages.ServerChangeReply;
import org.opendaylight.controller.cluster.raft.messages.ServerChangeStatus;
import org.opendaylight.controller.cluster.raft.messages.ServerRemoved;
import org.opendaylight.controller.cluster.raft.messages.UnInitializedFollowerSnapshotReply;
} else if(message instanceof RemoveServer) {
onRemoveServer((RemoveServer) message, sender);
return true;
+ } else if(message instanceof ChangeServersVotingStatus) {
+ onChangeServersVotingStatus((ChangeServersVotingStatus) message, sender);
+ return true;
} else if (message instanceof ServerOperationTimeout) {
currentOperationState.onServerOperationTimeout((ServerOperationTimeout) message);
return true;
}
}
+ private void onChangeServersVotingStatus(ChangeServersVotingStatus message, ActorRef sender) {
+ LOG.debug("{}: onChangeServersVotingStatus: {}, state: {}", raftContext.getId(), message,
+ currentOperationState);
+
+ onNewOperation(new ChangeServersVotingStatusContext(message, sender));
+ }
+
private void onRemoveServer(RemoveServer removeServer, ActorRef sender) {
LOG.debug("{}: onRemoveServer: {}, state: {}", raftContext.getId(), removeServer, currentOperationState);
boolean isSelf = removeServer.getServerId().equals(raftActor.getId());
protected void persistNewServerConfiguration(ServerOperationContext<?> operationContext){
raftContext.setDynamicServerConfigurationInUse();
- boolean includeSelf = !operationContext.getServerId().equals(raftActor.getId());
- ServerConfigurationPayload payload = raftContext.getPeerServerInfo(includeSelf);
+ ServerConfigurationPayload payload = raftContext.getPeerServerInfo(
+ operationContext.includeSelfInNewConfiguration(raftActor));
LOG.debug("{}: New server configuration : {}", raftContext.getId(), payload.getServerConfig());
raftActor.persistData(operationContext.getClientRequestor(), operationContext.getContextId(), payload);
- currentOperationState = new Persisting(operationContext, newTimer(new ServerOperationTimeout(operationContext.getServerId())));
+ currentOperationState = new Persisting(operationContext, newTimer(new ServerOperationTimeout(
+ operationContext.getLoggingContext())));
sendReply(operationContext, ServerChangeStatus.OK);
}
sendReply(operationContext, replyStatus);
}
- operationContext.operationComplete(raftActor, replyStatus);
+ operationContext.operationComplete(raftActor, replyStatus == null || replyStatus == ServerChangeStatus.OK);
currentOperationState = IDLE;
@Override
public void onServerOperationTimeout(ServerOperationTimeout timeout) {
LOG.warn("{}: Timeout occured while replicating the new server configuration for {}", raftContext.getId(),
- timeout.getServerId());
+ timeout.getLoggingContext());
timedOut = true;
}
void handleInstallSnapshotTimeout(ServerOperationTimeout timeout) {
- String serverId = timeout.getServerId();
+ String serverId = timeout.getLoggingContext();
LOG.debug("{}: handleInstallSnapshotTimeout for new server {}", raftContext.getId(), serverId);
handleInstallSnapshotTimeout(timeout);
LOG.warn("{}: Timeout occured for new server {} while installing snapshot", raftContext.getId(),
- timeout.getServerId());
+ timeout.getLoggingContext());
}
@Override
handleInstallSnapshotTimeout(timeout);
LOG.warn("{}: Timeout occured for new server {} while waiting for prior snapshot to complete",
- raftContext.getId(), timeout.getServerId());
+ raftContext.getId(), timeout.getLoggingContext());
}
}
return clientRequestor;
}
+ void operationComplete(RaftActor raftActor, boolean succeeded) {
+ }
+
+ boolean includeSelfInNewConfiguration(RaftActor raftActor) {
+ return true;
+ }
+
abstract Object newReply(ServerChangeStatus status, String leaderId);
abstract InitialOperationState newInitialOperationState(RaftActorServerConfigurationSupport support);
- abstract void operationComplete(RaftActor raftActor, ServerChangeStatus serverChangeStatus);
-
- abstract String getServerId();
+ abstract String getLoggingContext();
}
/**
}
@Override
- void operationComplete(RaftActor raftActor, ServerChangeStatus serverChangeStatus) {
-
- }
-
- @Override
- String getServerId() {
+ String getLoggingContext() {
return getOperation().getNewServerId();
}
}
}
@Override
- void operationComplete(RaftActor raftActor, ServerChangeStatus serverChangeStatus) {
+ void operationComplete(RaftActor raftActor, boolean succeeded) {
if(peerAddress != null) {
raftActor.context().actorSelection(peerAddress).tell(new ServerRemoved(getOperation().getServerId()), raftActor.getSelf());
}
}
@Override
- String getServerId() {
+ boolean includeSelfInNewConfiguration(RaftActor raftActor) {
+ return !getOperation().getServerId().equals(raftActor.getId());
+ }
+
+ @Override
+ String getLoggingContext() {
return getOperation().getServerId();
}
}
+ private static class ChangeServersVotingStatusContext extends ServerOperationContext<ChangeServersVotingStatus> {
+ ChangeServersVotingStatusContext(ChangeServersVotingStatus convertMessage, ActorRef clientRequestor) {
+ super(convertMessage, clientRequestor);
+ }
+
+ @Override
+ InitialOperationState newInitialOperationState(RaftActorServerConfigurationSupport support) {
+ return support.new ChangeServersVotingStatusState(this);
+ }
+
+ @Override
+ Object newReply(ServerChangeStatus status, String leaderId) {
+ return new ServerChangeReply(status, leaderId);
+ }
+
+ @Override
+ void operationComplete(final RaftActor raftActor, boolean succeeded) {
+ // If this leader changed to non-voting we need to step down as leader so we'll try to transfer
+ // leadership.
+ boolean localServerChangedToNonVoting = Boolean.FALSE.equals(getOperation().
+ getServerVotingStatusMap().get(raftActor.getRaftActorContext().getId()));
+ if(succeeded && localServerChangedToNonVoting && raftActor.isLeader()) {
+ raftActor.initiateLeadershipTransfer(new OnComplete() {
+ @Override
+ public void onSuccess(ActorRef raftActorRef, ActorRef replyTo) {
+ LOG.debug("{}: leader transfer succeeded after change to non-voting", raftActor.persistenceId());
+ ensureFollowerState(raftActor);
+ }
+
+ @Override
+ public void onFailure(ActorRef raftActorRef, ActorRef replyTo) {
+ LOG.debug("{}: leader transfer failed after change to non-voting", raftActor.persistenceId());
+ ensureFollowerState(raftActor);
+ }
+
+ private void ensureFollowerState(RaftActor raftActor) {
+ // Whether or not leadership transfer succeeded, we have to step down as leader and
+ // switch to Follower so ensure that.
+ if(raftActor.getRaftState() != RaftState.Follower) {
+ raftActor.initializeBehavior();
+ }
+ }
+ });
+ }
+ }
+
+ @Override
+ String getLoggingContext() {
+ return getOperation().getServerVotingStatusMap().toString();
+ }
+ }
+
+ private class ChangeServersVotingStatusState extends OperationState implements InitialOperationState {
+ private final ChangeServersVotingStatusContext changeVotingStatusContext;
+
+ ChangeServersVotingStatusState(ChangeServersVotingStatusContext changeVotingStatusContext) {
+ this.changeVotingStatusContext = changeVotingStatusContext;
+ }
+
+ @Override
+ public void initiate() {
+ LOG.debug("Initiating ChangeServersVotingStatusState");
+
+ Map<String, Boolean> serverVotingStatusMap = changeVotingStatusContext.getOperation().getServerVotingStatusMap();
+ List<ServerInfo> newServerInfoList = new ArrayList<>();
+ for(String peerId: raftContext.getPeerIds()) {
+ newServerInfoList.add(new ServerInfo(peerId, serverVotingStatusMap.containsKey(peerId) ?
+ serverVotingStatusMap.get(peerId) : raftContext.getPeerInfo(peerId).isVoting()));
+ }
+
+ newServerInfoList.add(new ServerInfo(raftContext.getId(), serverVotingStatusMap.containsKey(
+ raftContext.getId()) ? serverVotingStatusMap.get(raftContext.getId()) : raftContext.isVotingMember()));
+
+ raftContext.updatePeerIds(new ServerConfigurationPayload(newServerInfoList));
+ AbstractLeader leader = (AbstractLeader) raftActor.getCurrentBehavior();
+ leader.updateMinReplicaCount();
+
+ persistNewServerConfiguration(changeVotingStatusContext);
+ }
+ }
+
static class ServerOperationTimeout {
- private final String serverId;
+ private final String loggingContext;
- ServerOperationTimeout(String serverId){
- this.serverId = Preconditions.checkNotNull(serverId, "serverId should not be null");
+ ServerOperationTimeout(String loggingContext){
+ this.loggingContext = Preconditions.checkNotNull(loggingContext, "loggingContext should not be null");
}
- String getServerId() {
- return serverId;
+ String getLoggingContext() {
+ return loggingContext;
}
}
}